The electrical equipment of the crane includes electromagnets, motors, relays, and resistors. Due to the large number of electrical equipment inside the crane, the installation location is relatively compact, and the wiring concentration is high, it is more likely to cause electrical failures and lead to the failure of crane connection components.

1. Electromagnetic malfunction. These faults mainly include inability to completely overcome the force of the spring, inability to engage and release normally, high coil temperature, and abnormal sound during operation.

Reason: The power supply voltage in the circuit does not match the rated voltage of the electromagnet. Either too high or too low can make the magnetic attraction too strong or too weak.

2. Motor malfunction. Electric motors provide power for the operation of large and small vehicles as well as lifting mechanisms. During the operation of the crane, possible motor faults may include unstable stator parts, abnormal temperature, abnormal sound or smoke.

Reason: Unstable power supply voltage, mismatched working intensity between motor and model requirements, short circuit, and different performance parameters of the crane after major repairs can all lead to an increase in motor temperature. Abnormal noise from motors is usually caused by stator phase deviation or bearing damage at the factory.