Electricity: circuit makers and breakers – Interlocking – Between plural switches
Patent
1977-06-14
1979-11-27
Scott, James R.
Electricity: circuit makers and breakers
Interlocking
Between plural switches
H01H 920
Patent
active
041762622
ABSTRACT:
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 positions 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 position 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 pantograph 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.
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Westinghouse Corp., "Instructions for Porcel-Line Metal-Clad Switchgear Type DH-P Housings Indoor and Outdoor"; I.B. 32-253 A; Sep. 1967.
McMillen James W.
Tomeo Anthony
Moran M. J.
Scott James R.
Westinghouse Electric Corp.
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