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Found results for
 patents
1.
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CIRCUIT BREAKER WITH MAGNETICALLY-COUPLED TRIP INDICATOR
| Document Number |
02611346 |
| Status |
In Force |
| Filing Date |
2007-11-21 |
| Open to Public Date |
2008-06-04 |
| Grant Date |
2015-11-03 |
| Owner |
HITACHI ENERGY SWITZERLAND AG (Switzerland)
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| Inventor |
- Eley, Edgar R.
- Baskin, John B.
- Stacy, Fabian D.
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Abstract
An oil-immersed circuit breaker is provided having a mechanical/magnetic trip indicator. In a preferred embodiment, the trip indicator comprises a mechanical drive train (coupled to a conventional trip-sensing mechanism), a push piece, and an indicator piece. The drive train and the push piece are located inside the enclosure immersed in oil. The indicator piece is located outside the enclosure. The push piece is magnetically coupled to the indicator piece. Magnetic coupling eliminates problems encountered with prior art trip indicators associated with oil-seal leakage, electrical component failure, and power source failure.
IPC Classes ?
- H01H 71/04 - Means for indicating condition of the switching device
- H01H 33/04 - Means for extinguishing or preventing arc between current-carrying parts
- H01H 73/12 - Means for indicating condition of the switch
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2.
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METHOD AND DEVICE FOR CHARACTERIZING THE LINEAR PROPERTIES OF AN ELECTRICAL COMPONENT
| Document Number |
02601321 |
| Status |
In Force |
| Filing Date |
2006-01-17 |
| Open to Public Date |
2006-07-27 |
| Grant Date |
2015-03-03 |
| Owner |
HITACHI ENERGY SWITZERLAND AG (Switzerland)
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| Inventor |
- Niayesh, Kaveh
- Berth, Matthias
- Dahlquist, Andreas
- Heitz, Christoph
- Tiberg, Martin
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Abstract
A method and device for determining the linear response of an electrical multi- port component (1) has an "estimation procedure" in which an estimated admittance matrix is determined by applying voltages to the ports of the component and measuring the response of the component. The estimation procedure can e.g. consist of a conventional measurement of the admittance matrix. The method further has a "measurement procedure" in which several voltage patterns are applied to the port. The voltage patterns correspond to the eigenvectors of the estimated admittance matrix. For each applied voltage pattern, the response of the component is measured. This allows to measure the linear response of the component accurately even if the eigenvalues of the admittance matrix differ by several orders of magnitude.
IPC Classes ?
- G01R 27/28 - Measuring attenuation, gain, phase shift, or derived characteristics of electric four-pole networks, i.e. two-port networks; Measuring transient response
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3.
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PACKET COMMUNICATION BETWEEN A COLLECTING UNIT AND A PLURALITY OF CONTROL DEVICES OVER THE POWER SUPPLY LINE
| Document Number |
02520784 |
| Status |
In Force |
| Filing Date |
2004-03-24 |
| Open to Public Date |
2004-10-14 |
| Grant Date |
2016-02-16 |
| Owner |
HITACHI ENERGY SWITZERLAND AG (Switzerland)
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| Inventor |
Frezzolini, Aleandro
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Abstract
A communication method between a collecting unit (5) and a plurality of control devices (7i), each of which is associated with at least an electrical device (1i), via the power line. Messages are exchanged between the collecting unit (5) and the control devices (7i), each of which contains at least: a progressive message number (Pr_N); an addressee identification number (ID_addressee); a portion of information content and/or executable commands (M4). A specific identification number (ID _i) is assigned to each control device and to the collecting unit. The messages are therefore addressable selectively to a specific control device via said addressee identification number.
IPC Classes ?
- H04B 3/54 - Systems for transmission via power distribution lines
- H04L 12/403 - Bus networks with centralised control, e.g. polling
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