Is there such a situation in the production processThree-phase asynchronous motorDuring normal operation, for some reason, the power grid suddenly loses power, the motor power supply voltage drops to zero, then it stops running, then the moving parts of the production equipment will stop, and today followsMori machineXiaobian together to understand the content of the loss of voltage protection.

       Depending on the appeal, if action is not taken in time, when the power is restored,Three-phase asynchronous motorIt will automatically start to operate, which may cause the power grid to overcurrent and the current to drop instantaneously, and will also cause personal equipment accidents. In order to prevent the motor from starting on its own or the electrical components from working on their own when the voltage is restored, this protection is called loss of voltage protection.

       This protection uses the contactor and button control start and stop, with the loss of voltage protection, when the power supply voltage disappears, the contactor will automatically release and cut off the motor power, when the power supply voltage recovers, because the contactor self-locking contact will be disconnected, so it can not achieve self-start. If the button is not used, but the manual switch that cannot be automatically restored is used to control the contactor, then a special zero-voltage relay needs to be used. If there is a power failure in the working process of this relay, this relay will be released, and its self-locking circuit will be disconnected, and when the power supply voltage is restored, it will not start by itself.

       The above content is composed ofThree-phase asynchronous motor manufacturersMori machineIt is provided,19Year motor brand,3KWAnd belowSmall power motor manufacturers. If you want to know more about this type of motor or are interested in learning about our products, please leave a message online or call us directly0575-8378-1127.