Underoil primary circuit breaker

Details Underoil primary circuit breaker Underoil primary circuit breaker

H - Electricity

01

H

306/229, 306/66

H01H 33/75 (2006.01) H01F 27/40 (2006.01) H01H 3/00 (2006.01)

Patent

CA 1242755

ABSTRACT An underoil primary circuit breaker having a fixed contact assembly and a rod contact, a trip-free latch mechanism for moving the rod contact toward and away from the fixed contact, a temperature responsive magnetically controlled trip assembly for releasing the latch mechanism, and cross blast car interrupter for extinguishing the arc produced between the rod contact and fixed contact assembly, the interrupter including a core formed from an arc extinguishing material and defining within a reinforced case a pressure chamber, a pressure relief chamber, an arc passage connected to the pressure chamber and a vent passage connected to the vent chamber; high and low pressure exhaust ports are provided between the arc passage and the vent passage and a throttling tube is provided in the pressure relief chamber to vent gases into the transformer.

500653

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