The reliable functions of the phase sequence protector for electric hoists are mainly reflected in the following aspects:

Protecting the electric hoist motor:

The main function of the electric hoist phase sequence protector is to protect the electric hoist motor from damage caused by power phase sequence errors. When there is a phase sequence error in the power supply, the protector can quickly detect the phase sequence error and automatically shut down to avoid motor damage.

Preventing safety accidents:

The electric hoist adopts a three-phase asynchronous conical braking motor as the power device. When the phase sequence of the power supply changes, the direction of motor operation will be opposite to the original direction. This may cause the lifting device to rise when the down button is pressed, and the limit position limiter for the rise is not working, which can easily cause accidents such as crushing of the drum, deformation of the hook assembly, and breakage of the steel wire rope. The phase sequence protector can effectively prevent accidents caused by phase mismatch.

Working principle:

The phase sequence protector of the electric hoist controls the start and stop of the electric hoist by detecting the phase sequence of the power supply. It is installed on the control circuit of the electric hoist, detecting whether the phase of the three power wires in the control circuit is correct. If the phase is correct, the electric hoist can start normally; Otherwise, the phase sequence protector will automatically shut down.

Improve safety and reliability:

The electric hoist phase sequence protector not only protects the electric hoist equipment, but also ensures the safety of workers. Because incorrect phase sequence of electric hoists can lead to abnormal operation of equipment, which may pose a threat to the life and property safety of operators.

Multiple control circuits:

There are two types of control circuits for phase sequence protectors: direct control circuit and relay control circuit. Direct control circuits are usually used for small electric hoists, while relay control circuits are usually used for large electric hoists.

Importance and Wide Application:

In China, many CD and MD electric hoists have not taken phase shifting protection measures. Therefore, adding a phase failure protector to the electrical control system of electric hoists is of great significance for improving the safety and reliability of equipment and reducing accidents, and has been widely applied.

In summary, the electric hoist phase sequence protector effectively protects the electric hoist motor from damage and prevents safety accidents caused by phase sequence errors by detecting the power phase sequence and controlling the start and stop of the electric hoist, thereby improving the safety and reliability of the electric hoist.

The main equipment produced by Hebei Makita: stage electric hoist, electric chian hoist, wire rope electric hoist，Hand chain hoist, lever hoist, pneumatic hoist and other lifting equipment