An actuation assembly that is part of and operates to open and close a cut-out mounted switching device. The actuation assembly includes components that cause the switching device to be released from an upper coupling assembly when the actuation assembly opens the switching device and causes the switching device to be closed when the switching device is dropping out of the coupling assembly.
A system and method for operating a vacuum interrupter in a self-resetting interrupter. The method includes detecting fault current, opening the vacuum interrupter a first time using power harvested from the current transformer when the fault current is detected, and storing a polarity of the detected fault current when the vacuum interrupter is opened. The method then determines a close time to close the vacuum interrupter so that the current has the same polarity that was stored when the vacuum interrupter was opened and that actuation of closing the vacuum interrupter ends at a current zero crossing, closes the vacuum interrupter at the close time, and opens the vacuum interrupter a second time after the vacuum interrupter is closed using power harvested from the current transformer.
An electrical device including a first cylindrical capacitor, a first terminal electrically coupled to one end of the first capacitor, a first electrical line electrically coupled to the first terminal and a first annular conductive end shield formed over the first terminal and being electrically coupled to the first terminal and the one end of the first capacitor, where the first end shield has a greater diameter than the diameter of the first capacitor. The device also includes a second cylindrical capacitor, a second terminal electrically coupled to one end of the second capacitor, a second electrical line electrically coupled to the second terminal and a second annular conductive end shield formed over the second terminal and being electrically coupled to the second terminal and the one end of the second capacitor, where the second end shield has a greater diameter than the diameter of the second capacitor.
H01H 33/66 - Interrupteurs dans lesquels la coupure s'effectue dans le vide
H04B 3/54 - Systèmes de transmission par lignes de réseau de distribution d'énergie
H01H 33/53 - Enveloppes; Réservoirs, cuves, tuyauterie ou robinetterie pour le fluide d'extinction d'arc; Accessoires pour ces dispositifs, p.ex. dispositifs de sécurité, dispositifs de décompression
A system and method for generating phasors having a phase angle and magnitude from a sinusoidal power signal, and using the phasors to generate a frequency and RoCoF of the power signal. The system and method provide improvements over known systems and methods by correcting the frequency of sensor signals, providing a simplified phasor correction equation, reducing errors in a non-recursive DFT algorithm, improving frequency estimation by spacing out DFTs, correcting the sampling rate, providing linear interpolation of frequency and/or providing a variable DFT window length.
G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique
G06F 17/14 - Transformations de Fourier, de Walsh ou transformations d'espace analogues
A system and method for estimating fault current using a sliding observation window that is shorter than one cycle. The method may also include providing a pickup level that defines a current threshold for opening a switch in response to detecting the fault current; estimating the fault current from current measurement signals; accumulating time from a reset zero position during the time that the estimation of the fault current is greater than the pickup level; subtracting time from the accumulated time during the time that the estimation of the fault current is less than the pickup level after time has been accumulated from when the estimation of the fault current is greater than the pickup level; detecting the fault current if the accumulated time reaches a predetermined accumulation time; and opening the switch if the fault current is detected.
H02H 3/26 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un angle de déphasage entre tensions ou courants
H02H 3/353 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un angle de déphasage entre tensions ou courants comprenant la comparaison des valeurs de tension ou de courant en des points correspondants des différents conducteurs d'un même système, p.ex. de courants dans des conducteurs d'aller et retour d'un système triphasé impliquant une comparaison des tensions de phase
H02H 3/46 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à des écarts de fréquence
H02H 3/50 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à l'apparition de formes d'ondes anormales, p.ex. d'un courant alternatif dans des installations à courant continu
H02H 3/52 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à l'apparition de formes d'ondes anormales, p.ex. d'un courant alternatif dans des installations à courant continu sensibles à l'apparition d'harmoniques
H02H 3/44 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles aux taux de variation de quantités électriques
H02H 3/06 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec reconnexion automatique
H02H 3/08 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une surcharge
H02H 3/10 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une surcharge sensibles de plus à quelque autre condition électrique anormale
H02H 3/16 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un courant de défaut à la terre ou à la masse
An insulator that has particular application for enclosing a switching device, such as a vacuum interrupter. The insulator includes a body having a top portion and a bottom portion, and a plurality of ring-shaped sheds extending from the body between the top portion and the bottom portion. The sheds are asymmetrical in an axial direction such that an axial dimension of the sheds at one side towards the front of the switching device is shorter than an axial dimension of the sheds at an opposite side towards the rear of the switching device. The axial dimension of the sheds uniformly increases from the one side to the opposite side.
H01H 33/53 - Enveloppes; Réservoirs, cuves, tuyauterie ou robinetterie pour le fluide d'extinction d'arc; Accessoires pour ces dispositifs, p.ex. dispositifs de sécurité, dispositifs de décompression
H01H 33/66 - Interrupteurs dans lesquels la coupure s'effectue dans le vide
An anti-bounce dampener assembly for dampening the closing impact force between vacuum interrupter contacts. The dampener assembly includes a dampening spring positioned within a contact adapter, a guide tube extending through the contact adapter and the spring, where the guide tube is coupled to a fixed contact stem, and a bolt extending through the guide tube and being rigidly secured to the fixed contact stem. An impact force caused when the vacuum interrupter contacts contact each other when the vacuum interrupter is closed causes the fixed contact stem, the guide tube, the bolt and the vacuum interrupter to move against the bias of the spring and dampen the impact force. A flexible strap is electrically coupled to the fixed contact stem and the contact adapter, and flexes when the stem moves so as to maintain electrical coupling between the fixed contact stem and the contact adapter.
A switching device for controlling power flow on a power line. The device includes a current sensor for measuring primary current on the line, a first voltage sensor for measuring primary voltage on the line at one side of the switching device, and a second voltage sensor for measuring primary voltage on the line at another side of the switching device. An ADC converts measurement signals from the current sensor and the voltage sensors to digital signals, and a PMU calculates magnitude and phase angle synchrophasor data using the current and voltage measurement digital signals and calibration data.
H02H 3/48 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une rupture de synchronisme
G01R 19/257 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique utilisant des convertisseurs analogiques/numériques du type effectuant la comparaison de différentes valeurs de référence avec la valeur de la tension ou du courant, p.ex. utilisant une méthode par approximations successives
G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique
G01R 19/252 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique utilisant des convertisseurs analogiques/numériques du type à conversion de la tension ou du courant en fréquence et mesure de cette fréquence
G01R 27/28 - Mesure de l'atténuation, du gain, du déphasage ou des caractéristiques qui en dérivent dans des réseaux électriques quadripoles, c. à d. des réseaux à double entrée; Mesure d'une réponse transitoire
H02H 3/26 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un angle de déphasage entre tensions ou courants
A method for determining an optimized TCC operating curve for an electronic interrupting device that protects a distribution transformer in a power distribution network, where the TCC operating curve is some optimized predetermined percentage above a TCC curve for normal transformer operation. The method includes providing a TCC transformer curve that identifies an allowed transformer operation current once the transformer magnetics have been stabilized and the transformer is operating normally, and determining a TCC operating curve that is defined by points along the transformer curve plus a predetermined percentage above the transformer curve, where the operating curve identifies a response time for when the electronic interrupting device will open in response to a certain current flow.
H02H 7/04 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan pour transformateurs
H02H 3/093 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une surcharge avec des moyens de temporisation
H02H 3/10 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une surcharge sensibles de plus à quelque autre condition électrique anormale
G01R 22/10 - Dispositions pour la mesure de l'intégrale dans le temps d'une puissance électrique ou d'un courant, p.ex. compteurs d'électricité par des méthodes électroniques en utilisant des techniques numériques
H02H 3/06 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec reconnexion automatique
10.
METHOD FOR REDUCING LOCALIZED DEFORMATION IN SNAP-IN FEATURES
A snap-in link that provides a snap-in connection between two devices. The link includes an elongated portion and first and second flexible arms coupled to the elongated portion at one end and having a first snap-in slot at an opposite end. The flexible arms include an outer side, an inner side, a plurality of stress-concentration indentations formed in the outer side and a plurality of stress-concentration indentations formed in the inner side, where a nub is formed in each of the indentations along the outer side and the flexible arms define a slot therebetween.
A vacuum interrupter including a vacuum bottle, a fixed contact extending through one end of the vacuum bottle and a movable contact positioned within the vacuum bottle relative to the fixed contact so that a gap is defined between the fixed contact and the movable contact when the vacuum interrupter is open and the fixed contact and the movable contact are in contact with each other when the vacuum interrupter is closed. An insulated drive rod is rigidly coupled to the movable contact opposite to the fixed contact and a circular flexible conductor is coupled to the movable contact and flexes when the movable contact is moved by the drive rod. The flexible conductor can be, for example, a laminate structure including a plurality of stacked conductive laminates each having a plurality of spirals separated by gaps or a linear spring trampoline conductor.
H01H 33/66 - Interrupteurs dans lesquels la coupure s'effectue dans le vide
F04B 45/02 - Pompes ou installations de pompage, ayant des organes de travail flexibles, spécialement adaptées pour fluides compressibles ayant des soufflets
H01H 1/50 - Moyens pour accroître la pression de contact, empêcher la vibration des contacts, maintenir ensemble les contacts après l'entrée en contact, ou pour ramener les contacts à la position d'ouverture
12.
HIGH-VOLTAGE TRIGGERED PULSECLOSER WITH CRITICAL RECLOSING TIME ESTIMATION
a prioria priori knowledge or real-time behaviour. If the fault is not present, then the method determines a desired time to perform a reclose operation.
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
G01R 31/11 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux en utilisant des méthodes de réflexion d'impulsion
H02H 3/06 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec reconnexion automatique
A system and method for identifying an earth fault in a resonant grounded medium voltage network that employs a REFCL compensation system. The method derives a zero sequence real power from a phase voltage to ground on each phase and a current on each phase and aligns the zero sequence real power in time with a magnitude of a zero sequence voltage provided by the REFCL compensation system. The method determines when the zero sequence real power and the zero sequence voltage exceed predetermined thresholds. The method delays the magnitude of the zero sequence voltage for a predetermined period of time when the zero sequence voltage exceeds the threshold and determines that the fault is occurring when both the time aligned zero sequence real power exceeds the threshold and the magnitude of the zero sequence voltage exceeds the threshold for the predetermined period of time at the same time.
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
H02H 3/16 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un courant de défaut à la terre ou à la masse
G01R 31/52 - Test pour déceler la présence de courts-circuits, de fuites de courant ou de défauts à la terre
H02H 9/08 - Limitation ou suppression des courants de défaut à la terre, p.ex. bobine Petersen
14.
TRANSMISSION LINE FAULT LOCATION, ISOLATION & SYSTEM RESTORATION (FLISR) SYSTEM
An electrical power network employing fault location, isolation and system restoration. The system includes a plurality of switching devices electrically coupled along a power line downstream of a fault interrupting device. The switching devices each have current and voltage sensing capability and the capability to provide pulse tests for detecting fault presence. The fault interrupting device performs reclosing operations, and when the plurality of switching devices detect fault presence a predetermined number of times in coordination with a number of reclosing operations performed by the fault interrupting device and detect loss of voltage, each switching device opens. The fault interrupting device closes when the switching devices open, and the switching devices sequentially pulse test and close from a furthest upstream switching device when detecting return of voltage and no fault presence until a switching device closest to the fault pulse tests and detects fault presence and locks open.
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
G06Q 50/06 - Fourniture d'électricité, de gaz ou d'eau
G01R 19/165 - Indication de ce qu'un courant ou une tension est, soit supérieur ou inférieur à une valeur prédéterminée, soit à l'intérieur ou à l'extérieur d'une plage de valeurs prédéterminée
G01R 31/52 - Test pour déceler la présence de courts-circuits, de fuites de courant ou de défauts à la terre
H02H 3/30 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un angle de déphasage entre tensions ou courants comprenant la comparaison des valeurs de tension ou de courant des deux portions séparées d'un même système, p.ex. à deux bouts opposés d'une ligne, à la sortie et à l'entrée d'un appareil utilisant des fils pilotes ou autre canal de signalisation
H02H 7/26 - Protection sectionnelle de systèmes de câbles ou de lignes, p.ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits
15.
HIGH-VOLTAGE TRIGGERED PULSECLOSER WITH ADAPTIVE CIRCUIT TESTING
A system and method for maintaining electrical stability of a high-voltage transmission power system in response to a fault. The method includes detecting the fault, opening a switch to clear the fault, performing a first pulse test for a predetermined duration of time to determine if the fault is still present, preventing a reclosing operation from occurring if the pulse test indicates that the fault is still present, and allowing the reclosing operation to occur if the first pulse test indicates that the fault is not present. One or more subsequent pulse tests can be performed if the first pulse test is inclusive about the persistence of the fault, where the reclosing operation is prevented from occurring if the pulse tests indicate that the fault is still present and the reclosing operation is allowed if the pulse tests indicate that the fault is no longer present.
An energy harvesting circuit for harvesting energy from a medium voltage power line. The energy harvesting circuit includes an input capacitor electrically coupled to the power line and storing power therefrom, and a flyback converter including a primary coil and a secondary coil. The harvesting circuit further includes a switching circuit electrically coupled in series with the primary coil and being operable to electrically connect and disconnect the input capacitor to and from the primary coil, where the switching circuit includes an input voltage regulation feedback circuit for regulating an input voltage provided to the switching circuit from the input capacitor. The harvesting circuit also includes an output capacitor electrically coupled to the secondary coil and the actuator, where the output capacitor is charged by the secondary coil when the switching circuit is closed to provide power to an actuator to close a vacuum interrupter.
H02J 50/00 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique
H02J 11/00 - Circuits pour pourvoir au service d'alimentation des auxiliaires de stations, dans lesquels la puissance électrique est produite, distribuée ou convertie
17.
SERIES Z-SOURCE CIRCUIT BREAKER WITH PULSE-TESTING CAPABILITY
A series Z-source circuit breaker including a semiconductor switch that breaks source power being provided to a load in response to overcurrent. An electromechanical switch is electrically coupled in parallel with the semiconductor switch, a first capacitor is electrically coupled to an output side of the semiconductor switch, a second capacitor is electrically coupled in parallel with the semiconductor switch, and a delay circuit is electrically coupled in series with the first capacitor. The semiconductor switch is in an open position and the electromechanical switch is in a closed position when overcurrent is not present. Upon detection of overcurrent the semiconductor switch is closed, the electromechanical switch is opened and the delay circuit is controlled to delay when reverse bias current is provided from the first capacitor to the semiconductor switch to prevent source power from being provided to the load to give the electromechanical switch time to open.
H02H 3/087 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une surcharge pour des systèmes à courant continu
H01H 33/66 - Interrupteurs dans lesquels la coupure s'effectue dans le vide
H01H 33/59 - Circuits non adaptés à une application particulière de l'interrupteur et non prévus ailleurs, p.ex. pour assurer le fonctionnement de l'interrupteur en un point déterminé de la période du courant alternatif
An insulating rotary diaphragm for a vacuum interrupter (VI) electrical switch. The insulating diaphragm is designed for use in underground or pad-mounted VI switches where an external lever is rotated by a line worker to manually open the switch. A torsional insulating rod is coupled between a switch actuator and the external lever, and the diaphragm maintains constant contact with the insulating rod and an outer housing when the lever and rod are rotated, thus ensuring adequate isolation between the actuator and the lever. The diaphragm deforms torsionally when the lever and rod are rotated. This configuration allows the actuator to be at medium voltage, eliminates the need for a translational insulating rod between the medium voltage switch components and the lever, and thereby reduces the overall length of the VI switch.
A61M 60/126 - Pompes ou dispositifs de pompage implantables, c.-à-d. que le sang est pompé à l’intérieur du corps du patient implantables par, dans, à l’intérieur, en ligne, se ramifiant dans ou autour d’un vaisseau sanguin
A system and method for determining when an electronic interrupting device will open in response to detecting overcurrent, where the interrupting device protects a transformer in a power distribution network. The method includes obtaining a time/current through fault protection curve that is defined by a plurality of time/current points for the transformer that identifies when the transformer may experience thermal or mechanical damage in response to a certain current flow over a certain time in the transformer windings, selecting a time multiplier, and determining an operating curve for the interrupting device by multiplying the multiplier and a time portion of each of the plurality of time/current points on the through fault protection curve, where the operating curve identifies when the interrupting device will open in response to a certain current flow over a certain time.
H02H 7/04 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan pour transformateurs
G01R 22/10 - Dispositions pour la mesure de l'intégrale dans le temps d'une puissance électrique ou d'un courant, p.ex. compteurs d'électricité par des méthodes électroniques en utilisant des techniques numériques
H02H 7/00 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan
H02H 7/045 - Protection différentielle de transformateurs
A system and method for representing the topology of a power distribution network, where the network includes at least one power source, a feeder and a plurality of switching devices positioned along the feeder. The method includes providing a device list in each switching device that includes a local device index of each of the switching devices, a local team index of the team on an X-side of each of the switching devices, the local team index of the team on a Y-side of each of the switching devices and device specific data, where the X and Y-sides of the switching device is the physical orientation of the device when it is installed, and providing a team list in each switching device that includes the local team index of each of the teams, the local device indices of the switching devices on each team and team specific data.
G05B 19/042 - Commande à programme autre que la commande numérique, c.à d. dans des automatismes à séquence ou dans des automates à logique utilisant des processeurs numériques
A phase balancer switching device that switches input phases on one side of the device to select output phases on an opposite side of the switch for load balancing purposes in a low voltage power distribution network. The device includes an X-terminal having a first phase X-terminal line, a second phase X-terminal line and a third phase X-terminal line, a Y-terminal having a first phase Y-terminal line, a second phase Y-terminal line and a third phase Y-terminal line, and a switch electrically coupled to the X-terminal and the Y-terminal, where the switch includes a configuration of switch parts that are controlled to selectively connect the first, second and third phase X-terminal lines to the first, second and third phase Y-terminal lines.
A system and method for quickly detecting fault current on a power line in an electrical power distribution network. A switch assembly includes a detecting circuit for quickly detecting the fault current on the power line. The circuit includes a Rogowski coil wrapped around the power line that provides an output measurement signal that is proportional to a change in the current flow on the line, and a passive integrator responsive to the output measurement signal from the Rogowski coil that integrates the output measurement signal over time. The circuit also includes an amplifier responsive to and amplifying the integrated output measurement signal and a microcontroller responsive to the amplified output measurement signal that calculates the current flow on the line using the amplified output measurement signal. A current transformer harvests energy from the power line to power the circuit when the fault current is occurring.
G01R 19/30 - Mesure de la valeur maximale ou minimale d'un courant ou d'une tension atteinte dans un intervalle de temps
G01R 15/18 - Adaptations fournissant une isolation en tension ou en courant, p.ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs inductifs, p.ex. des transformateurs
G01R 15/20 - Adaptations fournissant une isolation en tension ou en courant, p.ex. adaptations pour les réseaux à haute tension ou à courant fort utilisant des dispositifs galvano-magnétiques, p.ex. des dispositifs à effet Hall
G01R 19/145 - Indication de l'existence d'un courant ou d'une tension
G01R 19/165 - Indication de ce qu'un courant ou une tension est, soit supérieur ou inférieur à une valeur prédéterminée, soit à l'intérieur ou à l'extérieur d'une plage de valeurs prédéterminée
23.
TRANSFORMER PROTECTOR WITH INTERNAL FAULT DETECTOR
A fault detection system that includes a recloser configured to perform a reclosing operation in response to detecting overcurrent. The system also includes a sensor adapted to be mounted to a can of a transformer and extending into the can for measuring pressure therein, where the sensor includes a mechanical indicator that extends when overpressure is detected. The transformer further includes a radio mounted to the can and coupled to the sensor, where the radio includes a switch coupled to the mechanical indicator and a transmitter. When the mechanical indicator extends in response to detecting overpressure in the can it causes the switch to close which causes the transmitter to send a signal that is received by a communications device, which prevents the recloser from reclosing.
H01H 71/62 - Mécanismes à réarmement manuel avec des moyens pour empêcher le réarmement pendant l'existence de conditions anormales, p.ex. dispositions à poignée libre
H01H 77/00 - Disjoncteurs de protection à maximum de courant actionnés par un courant en excès et nécessitant une manœuvre de réarmement séparée
H01F 27/40 - Association structurelle de composants électriques incorporés, p.ex. fusibles
H02H 7/04 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan pour transformateurs
A system and method for restoring power in a power distribution network. The network includes at least two power sources, at least one feeder and a plurality of switching devices positioned along the at least one feeder and being in communications with each other. The method determines that one or more of network sections is not receiving power, and determining a plurality of possible power restoration solutions that identify what sections each of the power sources that are available to provide power can provide power to based on a power capacity of the sources and a load requirement of the sections.
G01R 19/25 - Dispositions pour procéder aux mesures de courant ou de tension ou pour en indiquer l'existence ou le signe utilisant une méthode de mesure numérique
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
G06F 1/30 - Moyens pour agir en cas de panne ou d'interruption d'alimentation
H02H 1/06 - Dispositions pour fournir la puissance d'actionnement
H02H 3/06 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec reconnexion automatique
H02H 7/26 - Protection sectionnelle de systèmes de câbles ou de lignes, p.ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits
25.
VOLTAGE READINGS USING HIGH VOLTAGE RESISTOR ACROSS VACUUM INTERRUPTER
A switch assembly including a switch and a high impedance element used for energy harvesting purposes that are connected to a power line and assembly electronics. The high impedance element has higher impedance than the switch so that current flows through the switch from the power line when the switch is closed and through the high impedance element from the power line when the switch is open. The switch assembly also includes a current sensing device, such as a current sensing resistor, electrically coupled in series with the high impedance element and the electronics. By measuring the current flow using the current sensing device, it is possible to infer the voltage across the high impedance element since its impedance is known. This voltage can be used to provide point on wave closing of the switch and to determine the line voltage magnitude.
H01H 75/00 - Disjoncteurs de protection à maximum de courant dans lesquels un courant excessif ouvre les contacts en libérant automatiquement une énergie mécanique emmagasinée par l'actionnement précédent d'un mécanisme réarmé par un moteur
A center post assembly for eliminating sagging of a roof panel in a cabinet, where doors of the cabinet latch to the post assembly. The post assembly includes a base portion and a post portion, where one of the base portion or the post portion includes a plurality of slots and the other one of the base portion or the slot portion includes a plurality of threaded studs. The base portion further includes a first bracket and a jackscrew threaded into a threaded opening in the first bracket and the post portion further includes a second bracket, where the jackscrew engages the second bracket so that rotation of the jackscrew causes the second bracket to move relative to the first bracket so that the studs slide in the slots and increase the length of the post assembly to remove the sag.
A47B 96/14 - Barreaux, montants, traverses ou supports similaires pour meubles à tiroirs, tasseaux ou analogues
A47B 45/00 - Meubles à tiroirs, étagères ou rayonnages caractérisés par la possibilité de les étendre en hauteur, en longueur ou en profondeur
A47B 55/00 - Meubles à tiroirs, étagères ou rayonnages dont la rigidité de structure est une caractéristique essentielle
A47B 96/00 - TABLES; BUREAUX; MOBILIER DE BUREAU; MEUBLES À TIROIRS; TIROIRS; PARTIES CONSTITUTIVES GÉNÉRALES DES MEUBLES - Parties constitutives des meubles à tiroirs, étagères ou rayons non couvertes par un seul des groupes ; Eléments généraux de meubles
F16B 12/30 - Jointure des meubles ou objets similaires, p.ex. masquée de l'extérieur par chevilles, boulons, tenons, brides, clips ou dispositifs similaires pour éléments de meubles métalliques utilisant des écrous filetés
A transformer fault detection, where the transformer includes a primary winding coupled to a medium voltage power line and a secondary winding providing a stepped down voltage of the medium voltage. The detection system includes a switching device, where the switching device includes a first voltage measuring device for measuring the voltage on the primary winding, a controller for processing measured voltages and a transceiver for receiving and transmitting messages. The detection system also includes a second voltage measuring device for measuring the stepped down voltage on the secondary winding, where the second voltage measuring device includes a transmitter for transmitting the measured step down voltage to the switching device. The controller uses the measured voltages to calculate a transformer turns ratio (TTR) of the transformer to determine whether a transformer fault.
G01R 31/50 - Test d’appareils, de lignes, de câbles ou de composants électriques pour y déceler la présence de courts-circuits, de continuité, de fuites de courant ou de connexions incorrectes de lignes
G01R 31/52 - Test pour déceler la présence de courts-circuits, de fuites de courant ou de défauts à la terre
H02H 3/32 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un angle de déphasage entre tensions ou courants comprenant la comparaison des valeurs de tension ou de courant en des points correspondants des différents conducteurs d'un même système, p.ex. de courants dans des conducteurs d'aller et retour
H02H 7/04 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan pour transformateurs
A switch assembly including a switch and a high impedance element used for energy harvesting purposes that are connected to a power line at one end and assembly electronics at an opposite end, where in one non-limiting embodiment the switch assembly has particular application for use in connection with a vacuum interrupter. The high impedance element has higher impedance than the switch so that current flows through the switch from the power line when the switch is closed and through the high impedance element from the power line when the switch is open, where power from the high impedance element can power a switch closing device, such as a solenoid actuator. The high impedance element can be a resistive element, a capacitive element or a combination of a resistive and capacitive element.
H01H 33/66 - Interrupteurs dans lesquels la coupure s'effectue dans le vide
H01H 75/00 - Disjoncteurs de protection à maximum de courant dans lesquels un courant excessif ouvre les contacts en libérant automatiquement une énergie mécanique emmagasinée par l'actionnement précédent d'un mécanisme réarmé par un moteur
H02J 50/00 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique
A method for performing a low energy pulse testing in a power distribution network that causes contacts to close and then open in about one fundamental frequency cycle of current flow time and close on a voltage waveform that produces symmetrical fault current. The method includes energizing a magnetic actuator to move the actuator against the bias of a spring to move a movable contact towards a fixed contact. The method also includes de-energizing the actuator when the movable contact makes contact with the fixed contact so as to allow the spring to move the movable contact away from the fixed contact so that the amount of time that the current conducts is about one fundamental frequency cycle of the current, where energizing the magnetic actuator occurs when an applied voltage on the switch assembly is at a peak of the voltage wave so that the current is symmetric.
G01R 31/327 - Tests d'interrupteurs de circuit, d'interrupteurs ou de disjoncteurs
G01R 31/333 - Tests du pouvoir de coupure des disjoncteurs à haute tension
H02H 3/06 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec reconnexion automatique
H02H 7/00 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan
H01H 81/00 - Interrupteurs de protection dans lesquels les contacts sont normalement fermés, mais sont ouverts et fermés d'une façon répétée aussi longtemps que la cause persiste qui crée le courant excessif, p.ex. pour limiter le courant
A control system and method for sectionalizing switches and pulse-testing interrupter/reclosers in a distribution grid feeder which enables fault location, isolation and service restoration without requiring an external communications infrastructure to pass information between the switches. The method includes switches entering an armed state when they experience a high fault current during an initial fault event. Then, when the interrupter/recloser runs its test pulse sequence, any armed switch counts all test pulses as fault pulses, while non-armed switches count the test pulses as load pulses. Switches open to isolate the fault based on threshold values of fault pulse count and load pulse count. When an initially active interrupter/recloser completes its test pulse sequence, another interrupter/recloser begins its sequence, and all switches reconfigure their threshold values based on the new interrupter/recloser. Interrupter/reclosers after the initial device use a fast close-open event if necessary to arm some switches for proper fault-count opening.
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
H02H 3/033 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec plusieurs déconnexions selon un ordre préférentiel
H02H 7/26 - Protection sectionnelle de systèmes de câbles ou de lignes, p.ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits
A control system and method for sectionalizing switches and a source interrupter/recloser in a feeder, or portion of the distribution grid, which enables fault location, isolation and service restoration without requiring a communications infrastructure and communications equipment at the switches. The method includes each switch adaptively configuring fault-count, load-count and voltage-count thresholds upon which the switch should open. The thresholds for each switch are based on the switch's proximity to the active feeder source, which requires a determination of which source is powering the feeder at a particular time. Five different methods are disclosed to determine which source is active. When a fault is detected, the source interrupter/recloser opens and then begins a pulse testing or reclosing sequence, where the switches open to isolate the fault when reaching their fault-count or voltage-count threshold. When the fault is isolated, the source recloses to restore power to unaffected portions of the feeder.
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
H02H 3/033 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec plusieurs déconnexions selon un ordre préférentiel
H02H 7/26 - Protection sectionnelle de systèmes de câbles ou de lignes, p.ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits
32.
POWER DISTRIBUTION LATERAL PROTECTION SYSTEM AND METHOD
A fault protection system for providing protection from fault current for components and devices on a lateral line proximate to a distribution transformer in a power distribution network. The system includes a single-phase recloser having a vacuum interrupter that is controlled by a controller. In one embodiment, the recloser has an insulating body that is molded in combination with an insulating body of a bushing that is connected to the distribution transformer. In this embodiment, the controller can be powered by a current transformer within the recloser. In another embodiment, the recloser is mounted to a utility pole separate from the distribution transformer, where the controller is powered by the low voltage side of the transformer and the current transformer is eliminated. An isolated power supply is provided between the transformer and the controller to provide voltage isolation.
H02H 7/04 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan pour transformateurs
H01H 47/00 - Circuits autres que ceux appropriés à une application particulière du relais et prévue pour obtenir une caractéristique de fonctionnement donnée ou pour assurer un courant d'excitation donné
H01H 73/00 - Disjoncteurs de protection à maximum de courant dans lesquels un courant excessif ouvre les contacts en libérant automatiquement une énergie mécanique emmagasinée par l'actionnement précédent d'un mécanisme à réarmement manuel
H01H 75/00 - Disjoncteurs de protection à maximum de courant dans lesquels un courant excessif ouvre les contacts en libérant automatiquement une énergie mécanique emmagasinée par l'actionnement précédent d'un mécanisme réarmé par un moteur
H01H 77/00 - Disjoncteurs de protection à maximum de courant actionnés par un courant en excès et nécessitant une manœuvre de réarmement séparée
A guiding pull ring member for guiding a unit top contact in a switch assembly into a mounting contact. The guide ring member includes a mounting ring defined in a first plane, a grasping ring coupled to one side of the mounting ring and being defined in a second plane perpendicular to the first plane, and a V-shaped guide piece coupled to the mounting ring at a side opposite from the grasping ring and extending perpendicular to the first plane. The guiding pull ring member has particular application for a solenoid operated vacuum interrupter recloser switch mounted to a utility pole.
A method for identifying a location of a fault in an electrical power distribution network that includes identifying an impedance of an electrical line between each pair of adjacent utility poles, measuring a voltage and a current of the power signal at a switching device during the fault, and estimating a voltage at each of the utility poles downstream of the switching device using the impedance of the electrical line between the utility poles and the measured voltage and current during the fault. The method calculates a reactive power value at each of the utility poles using the estimated voltages, where calculating a reactive power value includes compensating for distributed loads along the electrical line that consume reactive power during the fault, and determines the location of the fault based on where the reactive power goes to zero along the electrical line.
G01R 31/02 - Essai des appareils, des lignes ou des composants électriques pour y déceler la présence de courts-circuits, de discontinuités, de fuites ou de connexions incorrectes de lignes
G05F 1/70 - Régulation du facteur de puissance; Régulation du courant réactif ou de la puissance réactive
H02H 9/00 - Circuits de protection de sécurité pour limiter l'excès de courant ou de tension sans déconnexion
A method of determining the topology of a portion of the electrical distribution grid such as a feeder based on voltage and current measurements. The method employs Bayesian-based topology detection, where voltage and current data is measured at switches in the feeder at numerous sample times. A voltage variance is calculated for each switch, along with a voltage correlation coefficient for each pair of switches. Voltage variance is used to establish a preliminary position of a switch in the feeder, where switches closest to the substation source are expected to exhibit the least variance, and vice versa. The voltage correlation coefficient is used to provide a first determination of whether two switches are in series with each other in a parent-child relationship, and a current magnitude comparison is used to confirm or refute the preliminary parent-child relationship between the two nodes.
A control system and method for a group of interconnected feeders which enables fault location, isolation and service restoration without requiring each switch to have topology knowledge of devices in adjacent feeders. The method defines, for each switch, connectivity and X/Y directional information about its neighboring switches and propagates this information throughout each feeder. A leader device is also determined for each feeder. Information about topology of adjacent feeders is not needed by all devices. Only normally-open tie switches which define a boundary between two adjacent feeders have knowledge of the devices in both feeders. Switches which open during fault isolation automatically find open tie switches in a direction opposite the fault, and request service restoration downstream of the fault by providing power from an adjacent feeder. Leader devices ensure an overload condition is not created before initiating opening and closing operations of switches downstream of the fault.
H02J 13/00 - Circuits pour pourvoir à l'indication à distance des conditions d'un réseau, p.ex. un enregistrement instantané des conditions d'ouverture ou de fermeture de chaque sectionneur du réseau; Circuits pour pourvoir à la commande à distance des moyens de commutation dans un réseau de distribution d'énergie, p.ex. mise en ou hors circuit de consommateurs de courant par l'utilisation de signaux d'impulsion codés transmis par le réseau
37.
FAULT PROTECTION CONFIGURATION FOR A RESETTABLE TRANSFORMER PROTECTOR
Described are curve shapes that may be implemented in a transformer protector that provide enhanced fault protection. A transformer protector curve rating structure relates response curves to the transformer size and simplifies selection of response curves implemented within a transformer protector and associated transformer. In a system, a transformer protector is configured with a response curve selected in respect to the size of an associated transformer.
H02H 7/04 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan pour transformateurs
H02H 3/00 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion
H02H 3/02 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails
A method for separating welded contacts in a magnetically actuated switch assembly that includes providing multiple actuator hammer blows to the contacts. The method includes causing the contacts to close using, for example, a manual actuation device and detecting a high current condition that occurs when the contacts are closed. The method further includes electrically actuating the actuator to open the contacts in response to detecting the high current condition and determining that the contacts have not opened in response to the actuator being actuated because they are welded together. The method also includes electrically actuating the actuator to close the contacts when it is determined that they are welded together and again electrically actuating the actuator to open the contacts.
B60L 11/12 - avec alimentation supplémentaire d'énergie électrique, p.ex. par accumulateur
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
G01R 31/327 - Tests d'interrupteurs de circuit, d'interrupteurs ou de disjoncteurs
H01H 1/50 - Moyens pour accroître la pression de contact, empêcher la vibration des contacts, maintenir ensemble les contacts après l'entrée en contact, ou pour ramener les contacts à la position d'ouverture
A method for closing an actuator in a magnetically actuated switch assembly, where the actuator includes an armature and a winding, and the switch assembly includes a manual actuation device coupled to one end of the armature and a movable terminal in a vacuum interrupter coupled to an opposite end of the armature. The method includes commencing a closing operation of the actuator using the manual actuation device to move the armature towards a closed latch position, detecting that the actuator is being manually closed, and energizing the winding to assist moving the armature to the closed latch position when the armature gets to a predetermined distance from the closed latch position.
H01F 7/08 - Electro-aimants; Actionneurs comportant des électro-aimants avec armatures
H01H 3/42 - Mécanismes-moteurs, c. à d. pour transmettre la force motrice aux contacts utilisant des cames ou excentriques
H01H 13/02 - Interrupteurs ayant un organe moteur à mouvement rectiligne ou des organes adaptés pour pousser ou tirer dans une seule direction, p.ex. interrupteur à bouton-poussoir - Détails
A system and method for determining if a fault condition exists in an electrical network. The method includes determining that a fault protection device has been opened and monitoring a voltage angle of a voltage waveform across a vacuum gap switching arrangement if the fault protection device is open, where the vacuum gap switching arrangement includes at least one vacuum gap switching element. The method also includes triggering a breakdown of a vacuum gap in the at least one vacuum gap switching element when the voltage angle corresponds to a predetermined switching angle to enable a temporary current flow through the vacuum gap switching arrangement, measuring the current flow through the vacuum gap switching arrangement, and determining whether the fault condition exists based at least in part on the measured current flow.
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
H02H 3/02 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails
H02H 3/08 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une surcharge
H02H 3/16 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un courant de défaut à la terre ou à la masse
41.
ENERGY STORAGE SYSTEMS AND METHODS FOR FAULT MITIGATION
Electrical systems and related operating methods are provided. One exemplary electrical system includes a power conversion system, a plurality of battery strings, a plurality of switching arrangements configured electrically in series between the respective battery strings and an interface to the power conversion system, and a control system coupled to the plurality of switching arrangements. The switching arrangements are operated to electrically connect a selected one of the battery strings to the power conversion system while concurrently isolating remaining battery strings from the power conversion system and the selected battery string.
A pole unit including a vacuum interrupter switch having a fixed contact extending into one end of a vacuum chamber and being electrically coupled to a first terminal, and a moving contact extending into an opposite end of the chamber. A sliding contact is rigidly coupled to the moving contact and slidably coupled to a second terminal. The pole unit also includes an electromagnetic actuator including a coil, a rod coupled to the sliding contact and a spring positioned against the rod. The pole unit further includes a transmitter coil and a receiver coil that are electromagnetically coupled, where the receiver coil is electrically coupled to the actuator and is electrically isolated from the transmitter coil. In this configuration, the interrupter switch, the actuator and the receiver coil are at a line potential and the transmitter coil is at ground potential.
G01V 3/00 - Prospection ou détection électrique ou magnétique; Mesure des caractéristiques du champ magnétique de la terre, p.ex. de la déclinaison ou de la déviation
H01H 9/20 - Mécanismes d'interverrouillage, verrouillage ou accrochage
H01H 33/66 - Interrupteurs dans lesquels la coupure s'effectue dans le vide
43.
FAULT PROTECTION DEVICES AND RELATED RECLOSING METHODS
Fault protection devices for electrical distribution systems and related reclosing methods are provided. One exemplary method of reclosing a switching element of a fault protection device after fault detection involves pulsing the switching element closed to enable a temporary current flow through the fault protection device and verifying absence of a fault condition based at least in part on the temporary current flow using a testing fault detection threshold. After verifying the absence of the fault condition, the method closes the switching element to enable current flow through the fault protection device, monitors the current flow through the fault protection device for the fault condition using the testing fault detection threshold for a transition period, and monitors the current flow through the fault protection device for the fault condition using a different fault detection threshold after the transition period.
H01H 71/04 - Moyens pour indiquer l'état du dispositif de commutation
H01H 71/10 - Mécanismes d'actionnement ou de déclenchement
H01H 83/06 - Interrupteurs de protection, p.ex. disjoncteur ou relais de protection actionné par des conditions électriques anormales autres que seulement les courants excessifs actionnés par un courant dont l'intensité tombe au-dessous d'une valeur prédéterminée
H01H 83/20 - Interrupteurs de protection, p.ex. disjoncteur ou relais de protection actionné par des conditions électriques anormales autres que seulement les courants excessifs actionnés par un courant excessif ainsi que par une autre condition électrique anormale
H02H 3/02 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails
H02H 9/02 - Circuits de protection de sécurité pour limiter l'excès de courant ou de tension sans déconnexion sensibles à un excès de courant
44.
SPIRAL CORE CURRENT TRANSFORMER FOR ENERGY HARVESTING APPLICATIONS
A current transformer assembly for harvesting power from a primary conductor, such as a power line, for operating electronics, where the assembly is secured to the conductor while the conductor is connected. The assembly includes a current transformer having a transformer structure with a central opening that accepts the primary conductor and a spindle member for accepting a current transformer magnetic tape operating as the core of the current transformer. The assembly also includes a tape carrier secured to the structure on which the transformer tape is wound, and a winding device operable to unwind the transformer tape from the tape carrier and wind the tape onto the spindle member.
H02J 11/00 - Circuits pour pourvoir au service d'alimentation des auxiliaires de stations, dans lesquels la puissance électrique est produite, distribuée ou convertie
H02J 50/00 - Circuits ou systèmes pour l'alimentation ou la distribution sans fil d'énergie électrique
A method for detecting a voltage disturbance on an electrical line coupled to a utility that provides three-phase electrical AC power signals to a critical load that includes a transformer. The method includes reading instantaneous voltage measurements at a high sample rate of each of the three-phase power signals, and calculating a flux in the transformer at the sample rate for each of three-phase power signals by adding the instantaneous voltage measurements at the current sample point and at a previous sample point. The method includes calculating a flux error for each of the three-phase signals at the sample rate as a difference between the newly calculated flux and the oldest calculated flux. The method determines whether the flux error for any of the three-phase power signals is greater than a first predetermined percentage or less than a second predetermined percentage, and if so, identifies a voltage disturbance.
H02H 3/32 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à un angle de déphasage entre tensions ou courants comprenant la comparaison des valeurs de tension ou de courant en des points correspondants des différents conducteurs d'un même système, p.ex. de courants dans des conducteurs d'aller et retour
H02H 7/04 - Circuits de protection de sécurité spécialement adaptés pour des machines ou appareils électriques de types particuliers ou pour la protection sectionnelle de systèmes de câble ou ligne, et effectuant une commutation automatique dans le cas d'un chan pour transformateurs
H01F 27/42 - Circuits spécialement adaptés à la modification ou la compensation des caractéristiques électriques des transformateurs, réactances ou bobines d'arrêt
46.
METHOD FOR AUTOMATICALLY COORDINATING PROTECTION SETTINGS IN AN ELECTRIC POWER DISTRIBUTION NETWORK
Methods and systems are provided for automatically coordinating protection settings for relays within an electrical power distribution network. A method includes using a graph traversal mechanism to analyze geographical-based equipment data that contains information about overcurrent relays within the electrical power distribution network. A customizable rule base is applied to protection guidelines. Protection settings are determined based upon the applied customizable rule base and the direction of fault current flow from each source. The determined protection settings are used for the overcurrent relays to control switches in the electrical power distribution network in response to a detected fault.
H02H 7/26 - Protection sectionnelle de systèmes de câbles ou de lignes, p.ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits
H02H 7/28 - Protection sectionnelle de systèmes de câbles ou de lignes, p.ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits pour réseaux maillés
H02H 1/00 - CIRCUITS DE PROTECTION DE SÉCURITÉ - Détails de circuits de protection de sécurité
H02H 9/00 - Circuits de protection de sécurité pour limiter l'excès de courant ou de tension sans déconnexion
47.
COORDINATED FREQUENCY LOAD SHEDDING PROTECTION METHOD USING DISTRIBUTED ELECTRICAL PROTECTION DEVICES
A method for providing frequency load shedding in a power distribution network. The network includes a number of distributed switch-gear assemblies that control whether AC power is provided to groups of loads. The distributed switch-gear assemblies monitor the frequency of the AC signal to determine if a frequency event is occurring and also determine the direction of the power flow at the time of the event. The switch-gear assembly may open in an underfrequency event only if the loads are drawing power from the network, and the switch-gear assembly may open in an overfrequency event only if there is reverse power flow during the event. In addition, the order of operation of which switch-gear assemblies may open first in response to the frequency event is determined in advance by the location of the switch-gear assembly in the network and a corresponding time delay and coordinated frequency set-points.
H02J 3/14 - Circuits pour réseaux principaux ou de distribution, à courant alternatif pour règler la tension dans des réseaux à courant alternatif par changement d'une caractéristique de la charge du réseau par interruption, ou mise en circuit, des charges du réseau, p.ex. charge équilibrée progressivement
G05B 17/02 - Systèmes impliquant l'usage de modèles ou de simulateurs desdits systèmes électriques
H02J 3/12 - Circuits pour réseaux principaux ou de distribution, à courant alternatif pour règler la tension dans des réseaux à courant alternatif par changement d'une caractéristique de la charge du réseau
A method for determining whether a fault is on a feeder line or a lateral line so as to allow an upstream recloser on the feeder line to immediately open in response to the fault if it determines the fault is on the feeder line. The method includes measuring a downstream voltage on the feeder line at a downstream recloser during the fault and transmitting the downstream voltage from the downstream recloser to the upstream recloser. The method can determine that the fault is on the feeder line or the lateral line by determining whether the fault voltage is approximately the same as the downstream voltage, or by comparing a first distance from the upstream recloser to the fault location using the fault voltage and a second distance from the upstream recloser to a last location of the fault current on the feeder line using the downstream voltage.
H02J 3/00 - Circuits pour réseaux principaux ou de distribution, à courant alternatif
H02J 3/12 - Circuits pour réseaux principaux ou de distribution, à courant alternatif pour règler la tension dans des réseaux à courant alternatif par changement d'une caractéristique de la charge du réseau
A method for detecting a voltage disturbance on an electrical line coupled to a utility that includes calculating a sliding window actual root mean squared (RMS) voltage for each three-phase power signal, calculating a sliding window filtered RMS average voltage for each actual RMS voltage to identify normal changes in the voltage of the power signals from a nominal voltage, and obtaining a difference between the actual RMS voltage and the RMS average voltage for each of the power signals. The method determines whether the difference between the actual RMS voltage and the RMS average voltage for any of the three-phase signals is greater than a first predetermined percentage, or whether the difference between the actual RMS voltage and the RMS average voltage for any of the three-phase signals is less than a second predetermined percentage, and if so, disconnects a load from the utility.
G01R 19/165 - Indication de ce qu'un courant ou une tension est, soit supérieur ou inférieur à une valeur prédéterminée, soit à l'intérieur ou à l'extérieur d'une plage de valeurs prédéterminée
G01R 19/02 - Mesure des valeurs efficaces, c. à d. des valeurs moyennes quadratiques
G01R 31/02 - Essai des appareils, des lignes ou des composants électriques pour y déceler la présence de courts-circuits, de discontinuités, de fuites ou de connexions incorrectes de lignes
50.
METHOD FOR FLUX RESTORATION FOR UNINTERRUPTIBLE POWER SUPPLY STARTUP
Apparatuses and methods are provided for restoring flux in a startup of an uninterruptible power supply device. The uninterruptible power supply device passes voltage to loads while offline. Upon occurrence of a utility disturbance, the output voltage is adjusted while maintaining RMS voltage within a pre-specified window in order to restore flux during startup of the uninterruptible power supply device.
H01F 27/42 - Circuits spécialement adaptés à la modification ou la compensation des caractéristiques électriques des transformateurs, réactances ou bobines d'arrêt
H02M 1/32 - Moyens pour protéger les convertisseurs autrement que par mise hors circuit automatique
H02J 9/06 - Circuits pour alimentation de puissance de secours ou de réserve, p.ex. pour éclairage de secours dans lesquels le système de distribution est déconnecté de la source normale et connecté à une source de réserve avec commutation automatique
An electrical power distribution network that is able to provide power to a plurality of loads, such as electric vehicle charging stations, on demand. The network includes a DC bus and a plurality of power sources that may be a number of renewable energy power sources, such as an array of photovoltaic (PV) cells and wind turbines, and a number of energy storage devices, such as batteries, that are electrically coupled to the DC bus. The network also includes a DC-to-AC power conversion system (PCS) that is electrically coupled to the DC bus and an AC utility feed line that is part of an electrical grid. The network further includes a system controller that controls which of the power sources and the utility grid provides power to the loads in response to a power demand from the loads and the available power from the power sources and the grid.
B60L 11/00 - Propulsion électrique par source d’énergie intérieure au véhicule (B60L 8/00, B60L 13/00 ont priorité;agencements ou montage de moteurs primaires constitués de moteurs électriques et de moteurs à combustion interne pour une propulsion réciproque ou commune B60K 6/20)
B60L 8/00 - Propulsion électrique à partir d'énergie tirée des forces de la nature, p.ex. du soleil ou du vent
H02J 7/00 - Circuits pour la charge ou la dépolarisation des batteries ou pour alimenter des charges par des batteries
Methods for energizing microgrids and microgrid energy distribution systems are provided. A method for energizing a microgrid includes energizing a storage management system (SMS) that is configured to control power distribution in the microgrid. The method further includes connecting a plurality of reactive components to the SMS based on a configuration control programmed into the SMS. The method yet further includes ramping up an output voltage of the SMS based on limiting inrush currents of the plurality of reactive components in the microgrid.
G06F 19/00 - Équipement ou méthodes de traitement de données ou de calcul numérique, spécialement adaptés à des applications spécifiques (spécialement adaptés à des fonctions spécifiques G06F 17/00;systèmes ou méthodes de traitement de données spécialement adaptés à des fins administratives, commerciales, financières, de gestion, de surveillance ou de prévision G06Q;informatique médicale G16H)
53.
ELECTRICAL SYSTEMS AND METHODS FOR ISLANDING TRANSITIONS
Electrical systems and related operating methods are provided. One exemplary electrical system includes a sensing arrangement coupled to an electrical grid interface to measure an electrical characteristic of the electrical grid interface, a power conversion module having an output coupled to the electrical grid interface, and a control module coupled to the sensing arrangement and the power conversion module. The control module determines a reference value for the electrical characteristic, identifies an islanding condition based on a difference between a value for the electrical characteristic and the reference value, determines a target output value for the power conversion module based on the difference, and in response to the islanding condition, operates the power conversion module to provide the target output value for the electrical characteristic at the output. The target output value reduces the difference while a connection arrangement is being opened to achieve islanding.
Electrical systems and related operating methods are provided. One exemplary electrical system includes a sensing arrangement coupled to an electrical grid interface to measure an electrical characteristic of the electrical grid interface, a power conversion module having an output coupled to the electrical grid interface, and a control module coupled to the sensing arrangement and the power conversion module. The control module determines an estimated frequency of the electrical characteristic based on a phase error corresponding to a measured value of the electrical characteristic obtained from the sensing arrangement, determines a frequency correction power command based on a difference between the estimated frequency and a target frequency, and operates the power conversion module in accordance with the frequency correction power command. The frequency correction power command regulates the frequency of the electrical characteristic of the electrical grid interface to the target frequency, for example, by charging or discharging a battery.
Electrical systems and related operating methods are provided. One exemplary electrical system includes a sensing arrangement coupled to an electrical grid interface to measure an electrical characteristic of the electrical grid interface, a power conversion module having an output coupled to the electrical grid interface, and a control module coupled to the sensing arrangement and the power conversion module. The control module determines an estimated frequency of the electrical characteristic based on a measured value of the electrical characteristic from the sensing arrangement, adjusts a commanded reactive power for the power conversion module to increase a difference between the estimated frequency and a reference frequency, operates the power conversion module in accordance with the adjusted reactive power command, and thereafter initiates a remedial action when the difference between the estimated frequency and the reference frequency exceeds a threshold amount.
H02J 3/38 - Dispositions pour l’alimentation en parallèle d’un seul réseau, par plusieurs générateurs, convertisseurs ou transformateurs
H02H 3/46 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à des écarts de fréquence
H01L 31/05 - Moyens d’interconnexion électrique entre les cellules PV à l’intérieur du module PV, p.ex. connexion en série de cellules PV
H02H 3/48 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion sensibles à une rupture de synchronisme
H02J 3/44 - Synchronisation d'un générateur pour sa connexion à un réseau ou à un autre générateur avec moyens pour assurer une séquence de phase correcte
H02J 5/00 - Circuits pour le transfert d'énergie électrique entre réseaux à courant alternatif et réseaux à courant continu
Method of controlling distribution of energy within an energy distribution system and energy distribution systems are provided. An energy distribution system includes a central controller and one or more remote distribution control units. A method includes obtaining, with the central controller from the remote distribution control units, operational data indicating an operational condition of the energy distribution system. The method further includes comparing the operational condition to a polling rate threshold that indicates when the operational condition is approaching a condition threshold at which the central controller will operably control operation of the remote distribution control unit. The method further includes adjusting a polling rate at which the operational data is obtained in response to the operational condition crossing the polling rate threshold. The method yet further includes polling and controlling the remote distribution control unit with the central controller at the adjusted polling rate.
G06F 1/26 - Alimentation en énergie électrique, p.ex. régulation à cet effet
G06F 15/16 - Associations de plusieurs calculateurs numériques comportant chacun au moins une unité arithmétique, une unité programme et un registre, p.ex. pour le traitement simultané de plusieurs programmes
H01L 31/05 - Moyens d’interconnexion électrique entre les cellules PV à l’intérieur du module PV, p.ex. connexion en série de cellules PV
Methods and apparatus are provided for fault detection and direction determination with a phase overcurrent relay using individual phase torques and the negative sequence torque, and with a ground overcurrent relay using the zero sequence torque. A directional element includes a ground element logic circuit, a negative element logic circuit and a phase element logic circuit to evaluate the operation state of the system, detect a fault condition and determine the direction of the fault condition in an electrical power distribution system having multiple sources on a power grid.
G01R 31/08 - Localisation de défauts dans les câbles, les lignes de transmission ou les réseaux
H02H 3/00 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion
H02J 3/18 - Dispositions pour réglage, élimination ou compensation de puissance réactive dans les réseaux
An electrical equipment connector having a replaceable bushing for an electrical power connector is disclosed. The replaceable bushing includes an insulator body having a tapered exterior surface formed on the first end, and a tapered interior surface formed in a second end. A conductor body extends through the insulator body and has a through bore with a counterbore at one end. A captured bolt in the counterbore engages a threaded tap in a conductor body disposed in the housing such that the tapered interior surface fits over and conforms to a tapered exterior surface on the housing connector.
H01R 13/58 - Moyens pour atténuer l'effort de tension sur le câble de connexion, p.ex. serre-câble
H01R 13/621 - Boulon, vis de serrage ou attache à vis
H01R 43/26 - Appareils ou procédés spécialement adaptés à la fabrication, l'assemblage, l'entretien ou la réparation de connecteurs de lignes ou de collecteurs de courant ou pour relier les conducteurs électriques pour engager ou séparer les deux pièces d'un dispositif de couplage
59.
CIRCUIT INTERRUPTERS WITH MASSES IN CONTACT SPRING ASSEMBLIES
Devices and assemblies are provided for operating circuit interrupters. A circuit interrupter assembly includes a circuit interrupter and a contact spring assembly. The circuit interrupter is located within the housing and includes a moving contact and a stationary contact. Contact spring assembly includes a mass, a plunger, a ferrule, a spring, and a dielectric drive rod. The mass defines an inner bore with a first diameter at a first portion of the mass and a second diameter that is larger than the first diameter at a second portion of the mass. The plunger has a flange portion and a body portion. The flange portion is located within the inner bore at the second portion and has a flange diameter that is larger than the first diameter. The spring is disposed within the inner bore between the plunger and the ferrule.
H01H 33/02 - Interrupteurs pour haute tension ou courant fort comportant des moyens d'extinction ou de prévention des arcs - Détails
H01H 33/59 - Circuits non adaptés à une application particulière de l'interrupteur et non prévus ailleurs, p.ex. pour assurer le fonctionnement de l'interrupteur en un point déterminé de la période du courant alternatif
H02H 3/02 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails
An enclosure includes a body portion, a top portion having a lid component configured to rotate with respect to the body portion to provide access to an interior compartment of the enclosure, and a counterweight assembly coupled between the lid component and the body portion. The counterweight assembly is configured such that the force required to rotate the lid component from the enclosure's closed position to its full-open position is substantially constant.
A busbar assembly for interconnecting electrical equipment units is disclosed. The busbar assembly includes one or more conductors have a conductive rod. Each end of the conductive rod has an end forming a ball member. The busbar assembly also includes two or more connectors having a clamp mechanism to receive the ball member of the conductive rod, A fastener threadably couples with a conductor on an electrical equipment unit to rigidly secure the busbar assembly to the electrical equipment units.
An electrical connector system includes a socket component and a plug component. The socket component includes a contact region, a first socket contact centrally located within the circular contact region, and a second socket contact radially offset from the first socket contact by a first distance. The plug component includes a plug having a plug face, a first plug contact centrally located substantially within the circular plug face, and an annular, elastically deformable conductor having a radius approximately equal to the first distance which functions as a second plug contact. The socket contact region is configured to mate with the plug face to provide electrical continuity, in a connected state, between the first socket contact and the first plug contact, and to provide electrical continuity between the second socket contact and the second plug contact.
A motor operator assembly is described, which is releasably secured and selectively coupled to a switchgear unit. The motor operator assembly includes a support plate, and a latch mechanism secured to the support plate that has a latch member configured to releasably secure the support plate to the switchgear unit. A guide tube is secured to the support plate and includes a cylinder assembly having a motor mount and an indexing mechanism for selectively positioning the cylinder assembly between a stowed position and a use position. A motor operator is attached to the motor mount and has a socket configured to engage an input drive shaft on the switchgear unit.
Methods, systems, and non-transitory, tangible computer-readable medium for generating a graphical user interface to view status events for devices operating within an electrical distribution system over various time interval granularities and ranges are disclosed. The graphical user interface provides users with the ability to select various overall ranges of time and time intervals within these ranges. By generating a simple graphical user interface in this manner, operating personnel can more easily view an aggregation of data for the electrical power system, predict trends, and isolate and rectify recurring problems.
An enclosure includes a body portion having a first slotted opening, a top portion including a rotatable lid component to provide access to an interior compartment of the enclosure. A locking assembly integral with the lid component includes an actuator component rotatably coupled to a side surface of the lid component and having a first threaded end portion and an actuator axis. The locking assembly further includes a drive cylinder having a second threaded end portion configured to receive the first threaded portion of the actuator component, wherein the drive cylinder is slideably coupled to the lid component, Rotation of the actuator component from a first position to a second position causes the drive cylinder to translate parallel to the actuator axis. The locking assembly further includes a first latch structure rigidly coupled to the drive cylinder to engage and disengage the first slotted opening.
E05B 65/52 - Autres serrures pour caisses, boîtes, malles, paniers, sacs de voyage ou similaires
E05C 9/02 - Aménagement de pênes à action simultanée ou d'autres dispositifs de blocage en des emplacements bien distincts sur le même battant avec deux barres coulissantes déplacées dans le même sens lors de l'immobilisation ou de la libération
An operating mechanism for a switchgear unit is disclosed. The operating unit includes an input drive shaft operable to rotate and counter-rotate. A trip linkage has a cam disk rotatably coupled to the input drive shaft and is coupled to a spring-drive mechanism for opening and closing the vacuum interrupter. An over-center linkage has a drive link rotatably coupled to the input drive shaft, and a follower link for opening and closing the isolating disconnect. Rotation of the input drive shaft through a first range drives the trip linkage for opening the vacuum interrupter and moves the drive link though an over-center position without opening the isolating disconnect. Rotation of the input drive shaft though a second range drives the over-center linkage for opening the isolating disconnect after the vacuum interrupter is opened.
A fuse link includes a conductive terminal component having a cylindrical insertion region with a knurled region formed therein and a fusible element electrically coupled thereto. A tubular sheath is configured to form a press-fit connection with the knurled region such that the tubular sheath substantially encloses the fusible element. The inner radius, the wall thickness, and the length of the tubular sheath are together configured to remain substantially intact when the fusible link experiences a first overload event within a first range of fault current values and burst when the fusible link experiences an overload event within a second range of fault current values that is greater than the first range.
Circuit interrupting devices, power distribution switchgear assemblies, and pole units for power distribution are provided. A circuit interrupting device includes a solid insulation housing, a disconnect, a window, and an insulating fluid. The solid insulation housing defines a first external opening and a first cavity extending into the solid insulation housing from the first external opening. The disconnect has a moving contact in selective engagement with a stationary contact in the first cavity. The window is secured to the solid insulation housing at the first external opening. The insulating fluid is disposed within the first cavity. The window, the solid insulation housing, or a combination thereof is configured to form a trap region that is in fluid communication with the first cavity and is configured to trap air bubbles in the insulating fluid.
A system and method for improving operation of power systems using global filtering criteria across multiple reports or dashboards is provided herein. The system and method may receive data regarding electric power system components, along with a filter selection from a power system operator. The operator' s filter selection is applied to the received data, and a first summary is generated. Upon receiving a request to generate a second summary, the system and method apply the filters to the received data to generate a second summary without requiring additional filter selection. The power system operator may then use the generated data in operating the power system.
Distributed energy storage within the distribution network of an electric power network at least partially supplied by time varying and unpredictable generation sources provides smoothing of energy flow within the distribution network. The distributed energy storage may include a plurality of distributed energy storage units operating under the control of a single controller or regional controllers. The distributed energy storage units may operate as groups of units or as separate units.
A dropout recloser is capable of in accordance with its operating programming after a predetermined number of fault interrupting operations, e.g., 1, 2, 3 or more but typically 3, to drop out of a cutout and hang freely in a hinge contact of the cutout providing sectionalization with an observable visible gap. The recloser includes fault interrupting and reclosing components, a drop out mechanism and a controller. The drop out mechanism may include a bi-stable actuator to affect fault interrupting operation and dropout operation. The device may include motion limiting structures. The recloser may have a number of operating modes or sequences.
This patent describes embodiments of systems, apparatus and methods to provide improved control and coordination of a multiplicity of electric distribution grid-connected, energy storage units deployed over a geographically-dispersed area.
H02J 3/28 - Dispositions pour l'équilibrage de charge dans un réseau par emmagasinage d'énergie
H02J 3/16 - Circuits pour réseaux principaux ou de distribution, à courant alternatif pour règler la tension dans des réseaux à courant alternatif par changement d'une caractéristique de la charge du réseau par réglage de puissance réactive
73.
DISTRIBUTED ENERGY SYSTEM THERMAL MANAGEMENT SYSTEM AND METHOD
A distributed energy storage or community energy storage unit incorporates a geothermal temperature regulation system. The system includes a sealed, chemically inert storage energy container or "pack" disposed within an underground chamber. The underground chamber is defined by a support structure or box pad 14 that includes side walls and a top or pad. Mechanical and electrical interfaces both to the utility connections and to the CES converter unit are also included.
An electric power distribution switch incorporates a stress-reiievi connection structure, a closing guiding structure, a weather shield structure an contact structure.
A multiple operation cutout and a method of operating the same and providing multiple fuse operation provides an assembly for a plurality of fuses. A mechanism individually and sequentially engages the fuses responsive to operation of the fuses.
A system for automated reconfiguration of a commodity distribution system is provided. The system includes a plurality of nodes located in the distribution system and a plurality of node controllers. The node controllers control respective nodes in accordance with a first or second operating mode to affect system reconfiguration in response to a fault condition, loading, system optimization, system expansion and combinations thereof.
Communications links can be established between a plurality of communications nodes to form an at least partially connected mesh network. Establishing a link can include transmitting synchronization data from a first communications node. The synchronization data can be transmitted symbol synchronously on a plurality of narrowband radio channels. A second communications node can combine energy received from the plurality of narrowband radio channels and use the combined energy to synchronize to the first communications node. Data transmissions can be demultiplexed by the first communications node into a plurality of lower rate streams for transmission across the plurality of narrowband radio channels. The second communications node can receive and multiplexed back together the lower rate streams.
A circuit testing closer is capable of closing a power distribution circuit and interrupting the resulting current at the next current zero. Upon detecting a fault, the circuit testing closer is operable to open contacts to isolate the fault. Next, the circuit testing closer tests the faulted line to determine whether the fault has cleared. The circuit testing closer may employ one or more dynamic thresholds to determine the existence of a fault.
H02H 3/06 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec reconnexion automatique
H01H 75/04 - Mécanismes à réarmement pour refermer automatiquement un nombre limité de fois
A mounting assembly includes a trunnion body portion (38) and a coupled guiding member (54). The guiding member (54) may be a spring or spring like and may further include a blocking structure (58). The trunnion body portion may include a loop (62).
A reclosing fault protection device detects a partial bypass state. Upon detecting the partial bypass state, the fault protection device implements a ground trip delay operating slate. The ground trip delay operating state provides a delayed ground trip response characteristic.
H02H 3/06 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec reconnexion automatique
H02H 1/04 - Dispositions pour prévenir la réponse à des conditions transitoires anormales, p.ex. à la foudre
H02H 11/00 - Circuits de protection de sécurité pour empêcher la commutation de mise en service dans le cas où une condition électrique de travail indésirable pourrait en résulter
81.
WEAR INDICATOR FOR A CIRCUIT INTERRUPTER EXHAUST CONTROL DEVICE
An exhaust control device (10) includes a wear indicator (90) disposed within a housing of the exhaust control device. The wear indicator (90) is arranged to be exposed to a flow of exhaust gas through the exhaust control device (10). The wear indicator has a first observable state indicative of remaining useful life of the exhaust control device. The wear indicator is responsive to a flow of exhaust gas through the exhaust control device to assume a second observable state indicative of the exhaust control device having reached the end of its useful life.
Fault protection is provided with fuse saving in a power distribution system. An operating characteristic of a fault protection device protecting a portion of the power distribution system is configured in view of fuse melting characteristics. In this manner, fault protection is provided with fuse saving, when possible, with reduced service disruptions.
H02H 3/07 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec reconnexion automatique et avec déconnexion permanente après un nombre prédéterminé de cycles de reconnexion
83.
POWER DISTRIBUTION SYSTEM SECURE ACCESS COMMUNICATION SYSTEM AND METHOD
A power distribution system may have source, switching and load components, wherein at least one of the source, switching and load components has a wireless communication capability such that it is operable to act as a wireless communication access point. A mobile station seeking to associate with the one component may use a secure access protocol to gain such access. The secure access protocol may provide for receiving at the one component a management message from the mobile station. From the management message the component may obtain mobile identification information used to verify the identity of the mobile station and to initiate communication by sending an association message. Until after successful verification of the mobile station identity the component remains radio silent.
A virtual closed loop power distribution system couples a parallel source to a feeder upon an initial indication of a fault existing on a distribution feeder. If the fault is persistent, a fault protection system including fault protection devices segmenting the distribution feeder operates to isolate the fault segment of the distribution feeder from each of the coupled sources. The coupled sources provide substantially uninterrupted service to the non-faulted segments of the distribution feeder until a circuit reconfiguration and return-to- normal function operates to restore the system upon repair of the fault.
H02H 7/26 - Protection sectionnelle de systèmes de câbles ou de lignes, p.ex. pour déconnecter une section dans laquelle un court-circuit, un défaut à la terre, ou une décharge d'arc se sont produits
H02H 3/06 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec reconnexion automatique
85.
POWER DISTRIBUTION SYSTEM COMMUNICATION SYSTEM AND METHOD
A power distribution system may incorporate a network communication capability The network (100) communication capability may be configured or may be configurable as a multi- tiered, mesh network The network may have two tiers of fixed node meshes (tier 2 and tier 3) and one tier of mobile nodes mesh (tier 1) Each tier and each node (106, 108) of each tier has distinct characteristics relative to application, type of routing, transmit power control, physical configuration and message priorities The configuration and the characteristics of the network change based upon varying application and communication needs of the network.
H04L 12/28 - Réseaux de données à commutation caractérisés par la configuration des liaisons, p.ex. réseaux locaux [LAN Local Area Networks] ou réseaux étendus [WAN Wide Area Networks]
86.
APPARATUS AND METHOD FOR AUTHENTICATING FUSE PRODUCTS
A fault protection device such as a fuse may have a body portion and a displaceable portion mounted to the body portion and displaceable from the body portion as a result of use or operation of the fault protection device. An authentication device is secured to the fault protection device. The authentication device may have a first portion secured to the body portion and a second portion secured to the displaceable portion in a manner that removal of the first portion or the second portion from the body portion and the displaceable portion, respectfully, results in irreparable damage to the authentication device. Furthermore, displacement of the displaceable portion from the body portion as a result of use or operation of the fault protection device results in irreparable damage to the authentication device. The authentication device may also include verifiable indicia authenticating a characteristic of the fault protection device as being genuine.
A power distribution protection system and method uses communications to coordinate operation of fault protection devices. Communications may be prioritized wherein messages of a lower priority are held or discarded in favor of messages of a higher priority, for example, messages indicating a fault condition. The devices may use multiple channel access schemes in accordance with a priority of a message to be communicated.
An electromagnetic actuator (100) is capable of providing a high speed driving force, for example, for driving the contacts of a circuit breaker or similar power distribution equipment. The electromagnetic actuator may use a directly powered moving coil element (110) in combination with one or more energized stationary coils (106,108) to generate an output force using reduced requirements for current, voltage and current/voltage rate-of-change. Precise control of actuator motion is obtained by permitting different supply voltages, firing times and capacitor supplies. The electromagnetic actuator (100) may further incorporate a return spring arrangement (138) and a magnetic latch arrangement (120).
A fault interrupting and reclosing device includes a circuit interrupter coupled to an actuator. The actuator includes at least one force generating element for generating an opening force for opening the circuit interrupter and for generating a restoring force to close the circuit interrupter. The device further includes a latch to engage the actuator to hold the contacts open once opened. In a preferred arrangement, the device is provided with an automatic mode of operation including a reclose process and a non-reclosing mode of operation. The device also preferably includes a method of determining the end-of-life of a vacuum interrupter monitors characteristics and/or parameters of a fault current or vacuum interrupter operation to predict a percent of life consumed with each fault current interruption operation. A cumulative percent of life consumed may also be determined, and an end-of-life may be predicted based upon the cumulative percent of life consumed.
A circuit interrupting device is manufacturable in a number of different configurations providing current path options, conductor connectivity options and sensing options. The device may include a configurable solid insulation housing into which various operable components are installed. The device may include a core element including a sensor assembly and conductor members, from which the various configurations may be established including a plurality of different current path configurations. A plurality of circuit interrupting devices (302) may be configured together in an assenbly with corresponding disconnect assemblies (306) . An interlock is provided to prevent operation of the disconnect assemblies (306) unless the circuit interrupting devices (302) are in an open state .
A circuit testing closer is capable of closing a power distribution circuit and interrupting the resulting current at the next current zero. Upon detecting a fault, the circuit testing closer is operable to open contacts to isolate the fault. Next, the circuit testing closer tests the faulted line to determine whether the fault has cleared. The circuit testing closer may generate a first test signal having a first polarity and a second test signal having a second polarity opposite the first polarity. Generation of the second test signal may be limited to occur when the first test signal indicates a fault.
H02H 3/06 - Circuits de protection de sécurité pour déconnexion automatique due directement à un changement indésirable des conditions électriques normales de travail avec ou sans reconnexion - Détails avec reconnexion automatique
H02H 11/00 - Circuits de protection de sécurité pour empêcher la commutation de mise en service dans le cas où une condition électrique de travail indésirable pourrait en résulter
92.
FAULT PROTECTION SYSTEM AND METHOD FOR AN ELECTRICAL POWER DISTRIBUTION SYSTEM
A fault protection system for an electrical power distribution system and a method of configuring and operating a fault protection system for an electrical power distribution system accepts device fault protection parameters, such as the time-current-characteristics (TCCs), of boundary devices, and selects and sets fault protection parameters for one or more fault protection devices, such as fault-interrupters, that thus coordinate with the boundary devices. Fault protection parameter selection for each fault protection device may occur automatically, and each device may reconfigure its fault protection parameters based upon changes in the electrical power distribution system, for example, as the result of fault isolation and/or service restoration.
An arc-interrupting compound, such as melamine, and to a method of extinguishing an arc by disposing the composition along the path of the arc, for contacting the arc. In one embodiment, the binder, or at least a portion of the binder, is a polymer that contains a functional group that binds to a coupling agent that is included in the arc-extinguishing composition. The coupling agent ties the polymeric binder to the arc-extinguishing compound, e.g., melamine, to provide new and unexpected physical strength and stability to the composition. In this embodiment, the molded composition, including the arc-interrupting compound coupled to the binder, maintains excellent arc-interrupting capability, while providing chemical stability and electrical insulating properties as well as unexpected physical strength.
H01H 85/42 - Moyens pour éteindre ou supprimer l'arc utilisant un gaz extincteur d'arc
H01H 33/73 - Interrupteurs comportant des moyens séparés pour diriger, obtenir ou augmenter l'écoulement du fluide extincteur d'arc comportant des organes fixes pour diriger l'écoulement du fluide extincteur d'arc, p.ex. chambre d'arc dans lesquels la coupure s'opère dans de l'air à pression atmosphérique, p.ex. à l'air libre
brevets
