Current limiter unit ampere rating module

Details Current limiter unit ampere rating module Current limiter unit ampere rating module

H - Electricity

02

H

H02H 3/093 (2006.01) H02H 9/02 (2006.01) H01H 33/16 (2006.01)

Patent

CA 2140605

A self-contained current limiter unit allows lower short-circuit rated circuit breakers to be utilized within industrial applications. The current limiter unit includes a rating module in the form of a positive temperature coefficient material connected in series with an ohmic resistor. The rating module is connected in parallel with the current limiter components to limit short current to a fixed value. A circuit breaker connected in series with the current limiter unit responds to interrupt the circuit current. Additional rating modules are connected in a ladder logic array to meet the distribution circuit short-circuit rating requirements.

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