H - Electricity – 02 – B
Patent
H - Electricity
02
B
306/327
H02B 1/14 (2006.01) H02B 11/133 (2006.01)
Patent
CA 1103292
AN AUTOMATIC FAIL-SAFE MECHANISM-OPERATED CELL SWITCH FOR METAL-CLAD SWITCHGEAR ABSTRACT OF THE DISCLOSURE A mechanism-operated cell switch (MOC) is provided for metal-clad switchgear. The cell switch actuates an auxiliary set of contacts for the main circuit interrupter. The main circuit interrupter may be disposed in two posi- tions within the metal enclosed switchgear. In the first position it is connected to the high voltage terminals of the cell for external circuit protection. In the second position it is not connected to the high voltage terminals but nevertheless remains in the cell for test purposes. In either position the mechanism operated cell switch may be actuated in conjunction with the actuation of the main circuit interrupter. However, in the second or test posi- tion the mechanism operated cell switch may be bypassed if desired. Furthermore, when the main circuit interrupter has been moved into the first position an abutment on a panto- graph mounted channel - which controls the MOC switch - is driven into a first operating position in which it stays even after the main circuit breaker has been subsequently moved to the test position, thus providing a fail-safe mode of operation. At this latter position, interlinkage between the circuit breaker and the channel for actuation of the MOC switch must be implemented manually thus providing a choice of operation.
303146
Mcmillen James W.
Tomeo Anthony
Mcconnell And Fox
Westinghouse Electric Corporation
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