A system for the verification of the absence of voltage has a first series of resistors and a first voltage limiter connected between a power line and a first voltage sensor and such as to limit a sensed voltage to a set amount above a threshold set by a standard and a first series of LC resonance filters connected between the power line and a RF signal generator. The system has a second series of resistors and a second voltage limiter connected between the power line and a second voltage sensor and a second series of LC resonance filters connected between the power line and an RF signal detector. The system is configured to detect continuity to the voltage line by sending an RF signal generated by the RF signal generator through the first lead line and detecting it at the RF signal detector via the second lead line.
An absence of voltage detection system has an isolation module connected to a voltage source to be detected an 1/0 accessory module connected to the isolation module wherein the 1/0 accessory module is configured to allow remote activation of the isolation module.
3.
CONNECTIVITY VERIFICATION FOR AN ABSENCE OF VOLTAGE TESTER SYSTEM
A permanently installed absence of voltage tester (AVT) may include a connectivity verification system for verifying the connectivity of system cable leads to the main power lines in electrical equipment. An installed AVT may indicate whether the electrical equipment is in an electrically safe state without first requiring direct access to the equipment. One step in the AVT test procedure may include connectivity verification by the connectivity verification system, which may include a sub-procedure to confirm that the installed AVT is directly coupled as intended with direct connection to the equipment being monitored. The connectivity verification system may validate that the AVT is measuring the actual voltage on the power lines of the electrical equipment and has not registered a no-voltage condition due to an unknown disconnection error or installation failure.
A bracket secured to adjacent cable baskets to form a cable routing pathway. The bracket includes a splice and a locking latch slidingly secured to the splice. The splice has a base with a top, a bottom, a first end, and a second end. The first end member extends from the first end of the base and a second end member extends from the second end of the base. The first end member and the second end member each include a vertical slot. The locking latch extends through the vertical slot of the first end member and the vertical slot of the second end member to secure the splice to the adjacent cable baskets.
H02G 3/06 - Joints for connecting lengths of protective tubing to each other or to casings, e.g. to distribution box; Ensuring electrical continuity in the joint
H02G 3/30 - Installations of cables or lines on walls, floors or ceilings
A method for verifying that a disconnect is open includes providing a disconnect verification unit electrically connected to a load side of a disconnect to be verified, having the disconnect verification unit determine whether the contact for each phase of the disconnect is open, having the disconnect verification unit determine whether the leads are connected to the load side of the disconnect; and sending a signal to a user interface of a status of the disconnect.
A cable management system includes multiple cables, each having a unique identifier associated therewith and each including first and second barcodes including the unique identifier, the first barcode located proximate a first end of the cable, the second barcode located proximate a second end of the cable. The system also includes a barcode scanner to scan barcodes of the cables, the barcode scanner including a clip to receive one of the cables. The system also includes a mobile computing device having a processor, data storage medium, communication unit, and user interface including a display. The mobile computing device is configured to receive via the user interface first end location information for a first cable, receive from the barcode scanner the first barcode of the first cable, and save and display the first end location information in association with the unique identifier of the first cable included in the first barcode.
A method for allowing access to an electrical enclosure having a disconnect includes upon initiation by a user or upon a change of state of the disconnect automatically performing the steps of checking for an absence of voltage, giving a positive indication of an absence of voltage, checking the state of each phase of the electrical disconnect to ensure contacts of the disconnect are open, and opening a lock on the enclosure.
A system and method for detecting the connectivity of an absence of voltage detector to the source of power to be detected has a first terminal wire connected to a first terminal and a second terminal wire also connected to the first terminal. An RF signal is placed on the first terminal and then its presence is detected on the second signal wire.This method and system can also be placed on each phase of a three phase system.
Various implementations of insulation piercing connectors are disclosed. The insulation piercing connectors may be used to attach dual independent electrical connections to a power cable for voltage detection purposes. In some implementations, an insulation piercing connector may include a top half, a bottom half, and a blade seal positioned between the top half and the bottom half. A threaded fastener may engage threads in a hole in a post on the bottom half. The threaded fastener may be tightened to compress the insulation piercing connector around a power cable.
H01R 4/2407 - Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation having saw-tooth projections
H01R 4/2408 - Connections using contact members penetrating or cutting insulation or cable strands the contact members having teeth, prongs, pins or needles penetrating the insulation actuated by clamping screws
H01R 13/52 - Dustproof, splashproof, drip-proof, waterproof, or flameproof cases
Examples disclosed herein illustrate various implementations of access ports that are to be mounted to various types of electrical enclosures. In some implementations, the access ports are circular to provide ease of installation and to reduce the overall footprint of the access ports.
An absence of voltage indicator has an isolation circuit, an FM modulator attached to the isolation circuit, a reference oscillator, and a mixer attached to the reference oscillator and the FM modulator, wherein the output of the mixer is the difference of the two signals. In one embodiment, the FM modulator includes a variable capacitor which varies in response to a voltage in parallel to a fixed capacitor and an inductor in parallel to the capacitors.
A voltage display module for a voltage indication device has a well body, communication cable, cap, and battery shuttle. The well body is secured to the door of the electrical enclosure. The communication plug of the communication cable is secured to the well body. The cap is removably secured to the well body and is accessible to a user from outside the enclosure. The battery shuttle is housed within the well body and has a communication jack secured to one end. The communication jack is configured to engage the communication plug when the battery shuttle is fully inserted and configured to be electrically isolated from the plug when the battery shuttle is partially withdrawn.
There is a need for an improved wire harness assembly process that is flexible and easy to assemble for fasting routing of wires. The present invention provides a wire harness (50), which is flexible and inexpensive, and includes a locking mount (110) for receiving a wire routing accessory (150, 160). The locking mount includes a main body with an upper portion (114), a base flange (115), and a lower portion (116). The lower portion (116) includes a locating shaft extending from the base flange (115). The locating shaft has keyed members positioned opposite each other. The locating shaft and the keyed members of the locking mount (110) are positioned in keyed holes (70) in a grid tile (60). The locking mount (110) is rotated to a locked position in the grid tile (60) to secure the locking mount (110) and the wire routing accessory (150, 160) mounted thereto.
H01B 13/012 - Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing wire harnesses
F16B 2/22 - Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material
There is a need for an improved wire harness assembly process that is flexible and easy to assemble for fasting routing of wires. The present invention provides a wire harness (50), which is flexible and inexpensive, and includes a at least one grid tile (60) designed to receive repositionable accessories (110, 150; 110, 160) to route wires along the grid tile. The at least one grid tile includes a plurality of keyed holes (70) extending from the top (62) of the grid tile, through the grid tile, to the bottom (64) of the grid tile. The at least one grid tile also includes a locking surface on the bottom of the grid tile. The locking surface includes a plurality of ramps and a plurality of grooves and complements the plurality of keyed holes to receive the repositionable accessory and to maintain the repositionable accessory in a locked position.
H01B 13/012 - Apparatus or processes specially adapted for manufacturing conductors or cables for manufacturing wire harnesses
F16B 2/22 - Clips, i.e. with gripping action effected solely by the inherent resistance to deformation of the material of the fastening of resilient material, e.g. rubbery material
Embodiments of the present invention generally relate to the field of data center cooling and energy management. In an embodiment of the present invention, multiple PODs within a data center are controlled by a controller via active dampers.
A cradle clamp bracket assembly is disclosed that is efficiently installed thereby significantly reducing installation time and labor costs, while increasing productivity. The cradle clamp bracket assembly secures cables to rungs of a ladder rack. The cradle clamp bracket assembly includes an elongated bracket having a first portion and a raised second portion. The first portion includes a slot located along the center of the first portion. The raised second portion includes a downwardly extending flange and at least one gusset to strengthen the bracket. The cradle clamp bracket assembly also includes a retainer that is received in the slot to engage the rung of the ladder rack to secure the cradle clamp bracket assembly.
A cradle clamp bracket assembly is disclosed that has reduced installation time and labor costs, and increased productivity. The assembly secures cables to ladder rack rungs. The assembly includes a bracket comprising a first portion having a recessed area with a slot therein, and a raised portion with a flange extending downwardly therefrom to receive a cable strap or tie wrapped under the raised portion of the bracket and around the cable to secure the cable to a ladder rung, the raised portion being parallel to the first portion. A ladder rung nut is received in the recessed area. A fastener extends through the slot of the recessed area into the ladder rung nut. A compression spring engages the fastener. The bracket is positioned under the ladder rung and the ladder rung nut is tightened to engage the ladder rung thereby securing the bracket to the ladder rack.
Cable foil tape having random or pseudo-random patterns or long pattern lengths of discontinuous metallic shapes and a method for manufacturing such patterned foil tape are provided. In some embodiments, a laser ablation system is used to selectively remove regions or paths in a metallic layer of a foil tape to produce random distributions of randomized shapes, or pseudo-random patterns or long pattern lengths of discontinuous shapes in the metal layer. In some embodiments, the foil tape is double-sided, having a metallic layer on each side of the foil tape, and the laser ablation system is capable of ablating nonconductive pathways into the metallic layer on both sides of the foil tape.
H05K 3/02 - Apparatus or processes for manufacturing printed circuits in which the conductive material is applied to the surface of the insulating support and is thereafter removed from such areas of the surface which are not intended for current conducting or shielding
19.
METHOD AND SYSTEM FOR IMPROVING CROSSTALK ATTENUATION WITHIN A PLUG/JACK CONNECTION AND BETWEEN NEARBY PLUG/JACK COMBINATIONS
This application describes a jack for improving crosstalk attenuation. The jack has a housing, a foil at least partially surrounding the housing, a printed circuit board, and at least one pair of insulation displacement contacts and vias. Each pair of insulation contacts and vias are associated with a differential signal. A conductive trace stub is routed on the printed circuit board near the edge of the board in order to at least partially balance the coupling from one of the insulation displacement contacts and vias of a pair to the foil with the other insulation displacement contact and via of the pair.
The present invention relates to a barrier tape used as part of a communication cable to improve crosstalk attenuation. The barrier tape is provided with two or more barrier layers of discontinuous conductive segments. Conductive segments of one barrier layer are preferably sized and shaped to overlie gaps between conductive segments of another barrier layer.
A communication connector is described that includes a plug and a jack, into which the plug is inserted. The plug terminates a length of twisted pair cable. The jack includes a sled to support contacts for connecting to wires within the cable, a rigid circuit board that connects to the contacts, and a flex board that contacts the plug interface contacts. The jack also includes circuitry to compensate for crosstalk between wire pairs of the cable by adding capacitance values within the sled, rigid circuit board and/or flex board between traces carrying signals from the wire pairs so that crosstalk caused by the plug between wire pairs that have signals in phase cancels with crosstalk caused by the plug between signals out of phase, and so that the capacitance values added between each trace are about equal. The compensation is performed to reduce differential to common mode signal conversion.
A jack is provided that has compensation and crosstalk zones. At least one of the zones employs a lattice network that couples conductors in the zone to reduce the net crosstalk in the plug/jack system. The lattice network has a frequency response slope that is different from the frequency response slope of a first-order coupling or of a series LC circuit coupling. A variety of lattice networks are provided.
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