Drawout apparatus having improved trip interlock

Details Drawout apparatus having improved trip interlock Drawout apparatus having improved trip interlock

H - Electricity

02

B

306/276

H02B 11/02 (2006.01)

Patent

CA 1075745

41DA-1934 ABSTRACT OF THE DISCLOSURE A drawout mechanism includes a carriage mounting a circuit breaker and supported on telescoping rails to facilitate rack- ing 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. In a intermediate 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 the test and engaged positions 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 the 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.

267440

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