The sudden interruption of the electric hoist during operation may be caused by electrical faults, mechanical faults, or improper operation. The following are the specific reasons and analysis:

1、 Electrical malfunction

Power issue:

The power supply system did not provide power: The power supply system did not provide power to the electric hoist, resulting in the equipment being unable to start.

Phase loss operation: The electrical components of the main and control circuits of the hoist are damaged, the circuit is disconnected, or the contact is poor, resulting in a phase loss that prevents the motor from working properly. Phase loss operation can increase the motor current, cause overheating, and in severe cases, even burn out the motor.

Voltage too low: The motor terminal voltage is more than 10% lower than the rated voltage, and the starting torque of the motor is too small, which makes the hoist unable to lift the goods and unable to work.

Control switch malfunction:

Damaged or poorly connected control switch: The control switch is a critical component for operating the electric hoist. If damaged or poorly connected, it can cause the equipment to fail to start or stop.

Fuse blown: A fuse is a protective device for an electrical system. When the current is too high, the fuse will blow to protect the equipment. If the fuse blows, the electrical system will not function properly.

Poor contact of the circuit:

Poor contact of sliding contact wire: The sliding contact wire is an important component for supplying power to electric hoists. If the plastic shell of the sliding contact wire is fragile or severely deformed during transportation and installation, or if there is displacement at the interface between the sliding wire and the sliding wire, it will often cause poor contact and phase loss or power outage when the current collector passes through the interface.

Poor contact of other circuits: In addition to sliding contact wires, other electrical circuits such as power lines, control lines, etc. may also have poor contact, causing the equipment to malfunction.

2、 Mechanical malfunction

Brake malfunction:

Brake stuck or malfunctioning: The brake is an important safety device for electric hoists. If the brake is stuck or malfunctioning, it will affect the descent control of the hoist and even cause the equipment to fail to stop.

Too small brake clearance: Too small a brake clearance can cause the brake to not fully disengage, resulting in significant friction. Friction heating also increases the additional load, causing the motor speed to decrease and the current to increase, resulting in heat generation.

Mechanical component wear:

Wear and tear of reducers, bearings, etc.: The mechanical components of electric hoists, such as reducers and bearings, may experience wear and tear after prolonged use, leading to unstable operation or noise.

Wear or deformation of components such as chains and hooks: The wear or deformation of components such as chains and hooks can also affect the normal operation of electric hoists.

3、 Improper operation

Overloading usage:

Overloading can cause difficulty or inability to start the electric hoist, and in severe cases, may even burn out the motor. Therefore, when using an electric hoist, it is necessary to ensure that the load is within the rated range.

Slant pulling and hanging:

When using electric hoists improperly to lift equipment, various tilting and pulling phenomena may occur. The electric hoist may tilt under force, causing the current collector to deviate from the normal track, resulting in poor contact between the current collector and the sliding wire, leading to phase loss or circuit breakage.

Inexperienced or misoperated operation:

The operator's unfamiliarity or misoperation with the electric hoist may also lead to sudden interruption of the equipment. For example, not fully pressing or accidentally touching other buttons when pressing the start button.

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