Drawout apparatus for electrical switchboards

Details Drawout apparatus for electrical switchboards Drawout apparatus for electrical switchboards

H - Electricity

01

H

306/275

H01H 71/04 (2006.01) H01H 71/02 (2006.01) H02B 11/133 (2006.01)

Patent

CA 1046566

DRAWOUT APPARATUS FOR ELECTRICAL SWITCHBOARDS 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 is powered via a racking screw and cam combination to provide enhanced mechanical advantage. Interlocks and latches are provided to insure authorized, safe operation.

249917

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