过载保护：自带热敏保护开关，过载后自动停机；
Over-load protection: self-equipped with heat protection switch. Fan stops work when over loaded.
该泵密封油室内设置有高精度抗干扰漏水检测传感器，及定子绕组内预埋了热敏元件，对水泵电机绝对保护。
The pump seal oil leakage indoor settings are high-precision interference detection sensors, and embedded within the stator windings of the thermal components, absolute protection of the pump motor.
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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