电路的过载电流
The overload current of the circuit
以上为机器翻译结果，长、整句建议使用 人工翻译 。
当电路出现故障使回路电流增大时，过载保护PT C热敏电阻的电阻值因自热温升而出现阻值阶跃，直至把电路切断。
When the circuit breaks down and the return circuit current increases, the resistance of restricting overloading protection PTC Thermistor goes up sharply for being warm, until the circuit is cut off.
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