Compact circuit interrupter having multiple ampere ratings

Inductor devices – Winding formed of plural coils

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336173, H01H 7108

Patent

active

050159836

ABSTRACT:
A compact circuit breaker containing an electronic trip unit for interrupting overcurrent conditions within a protected circuit is made operable over a wide operating current range by means of current transformers having multiple turn primary windings. The primary windings are selected to provide a constant ampere-turns ratio to the current transformers without changing the size of the secondary winding or the volume of the transformer core.

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