FIELD: electrical engineering.
SUBSTANCE: device incorporates temperature pickup fitted on the automatic circuit breaker fixed contact, a potentiometer, a comparator outputting signal in the circuit breaker drive control circuit, a power source with galvanic decoupling and an optical isolator with its inputs connected to the comparator output and its outputs connected to the automatic circuit breaker drive control circuit.
EFFECT: higher accuracy of overload determination and reliability ensured by direct measurement of circuit breaker fixed contact temperature.
1 dwg
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