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Motor protectorIt can detect the current, voltage, and temperature of the stator coil of the motor. If one of the three does not work properly, the motor protector will be activated! For example, if the voltage is too low, the current is too high, and the motor temperature is too high, these parameters need to be set. So what causes the motor protector to trip? The following is a detailed introduction.

In practical applications, there are many reasons that can cause motor overload tripping, which can be roughly divided into the following categories:

(1) Motor overload and excessive current caused by various reasons;

(2) Current imbalance caused by voltage being too low or too high, phase imbalance or phase loss (including phase loss caused by contactor failure);

(3) The return air pressure is too low due to refrigerant leakage or pipeline problems, resulting in insufficient motor cooling;

(4) The winding insulation layer is damaged or the refrigerant water content is too high, short circuit burning, etc. In theory, the motor overload protector can effectively deal with the first two situations, and the thermal protector can deal with the first three situations. The "short circuit" in the fourth situation may be related to quality or installation, or it may be related to metal chips or too high water content in the refrigerant.

Currently usedThermal protectorThe limitation of the motor overload protector is that it cannot fundamentally avoid the occurrence of all the above phenomena. Therefore, the protection of the motor can only remain at the post-event "cooling therapy", that is, temporarily shutting down the compressor to let it cool naturally, and then running it again.

Changzhou Ainuo Electronic Technology Co., Ltd. is a professional manufacturer and sellerMotor protectorOur company currently produces products including motor protectors, motor protectors, PTC electric heaters and other products. Our product qualification rate is as high as 99%. If you have any needs, please feel free to consult us!