Drawout apparatus having improved secondary contact mounting...

Details Drawout apparatus having improved secondary contact mounting... Drawout apparatus having improved secondary contact mounting...

H - Electricity

01

H

306/274

H01H 9/20 (2006.01) H01H 1/46 (2006.01) H02B 11/133 (2006.01)

Patent

CA 1046117

ABSTRACT OF THE DISCLOSURE 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 identified these engaged, test and disengaged positions. Racking movement is powered via a racking screw and cam combination to provide enhanced mechanical advantage. Interlocks and latches are provided to insure authorized, safe operation.

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