Electricity: circuit makers and breakers – Interlocking – Between plural switches
Patent
1975-04-14
1977-03-15
Scott, James R.
Electricity: circuit makers and breakers
Interlocking
Between plural switches
361339, H01H 920, H02B 1100
Patent
active
040126102
ABSTRACT:
A drawout mechanism includes a carriage mounting a circuit breaker and supported on telescoping rails to facilitate racking movement of the circuit breaker between extreme positions of electrical engagement and disengagement with respect to switchboard primary disconnect contacts. In an intermediate test position, the primary contacts are disengaged but secondary contacts of the circuit breaker and switchboard remain engaged for testing of accessorial functions. An indicator identifies these engaged, test and disengaged positions. Racking movement between the test and engaged positions is powered via a racking mechanism. A trip interlock controlled by the racking mechanism operates to enable closure of the circuit breaker only when the carriage is in the test and engaged positions and to trip the circuit breaker incident with initial movement of the carriage away from these two positions, as well as to disable closure of the circuit breaker while the carriage is anywhere therebetween.
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patent: 3663773 (1972-05-01), Powell
Ericson Eric Axel
Kaufhold Frederick Daniel
Bernkopf Walter C.
Cahill Robert A.
General Electric Company
Neuhauser Frank L.
Scott James R.
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