The electric protective device for the sensor is developed in view of ordinary faults in use.
针对工程使用中经常出现的故障，研制了相应的电气保护装置。
In order to reduce the power cut off which caused by electric shock accident and earth-fault power cut off, it must install residual current operated protective device.
低压供用电系统中为了减少发生人身电击事故和接地故障切断电源时引起的停电，必须加装剩余电流动作保护装置。
The utility model discloses a phase interruption protective device for three-phase electric motor.
一种三相电机的断相保护装置。
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