Current limiter unit for molded case circuit breakers

High-voltage switches with arc preventing or extinguishing devic – Arc preventing or extinguishing devices

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361 13, 335201, 218 22, 218143, H01H 942, H01H 3316

Patent

active

054281954

ABSTRACT:
A self-contained current limiter unit allows lower short-circuit-rated circuit breakers to be utilized within industrial applications. The unit is electrically-connected in series with the circuit breakers and the protected load to limit the short circuit current to a fixed predetermined value while the circuit breaker trip unit responds to interrupt the circuit current. A single unit can be arranged in electrical series connection with a plurality of lower short-circuit-rated circuit breakers to allow a substantial savings in component and equipment costs.

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