Demagnetization refers to the elimination or reduction of residual magnetism accumulated in power equipment due to long-term operation through specific methods. Residual magnetization can have adverse effects on the performance and safety of equipment, therefore demagnetization is one of the important steps in maintaining the normal operation of power equipment.

1、 What is remanence?

Residual magnetism refers to the magnetic induction intensity that remains in ferromagnetic materials (such as transformer cores, motor rotors, etc.) after the external magnetic field is removed. Long term operating power equipment may accumulate residual magnetism in internal ferromagnetic components due to current fluctuations, faults, or other reasons, which can affect the efficiency and stability of the equipment.

2、 The importance of demagnetization

1. Improve equipment efficiency: Residual magnetization can cause additional energy loss during startup or operation of the equipment, and demagnetization can restore the optimal performance state of the equipment. 2. Ensure safe operation: Residual magnetism may cause misoperation or abnormal vibration, increasing the risk of equipment failure. Regular demagnetization can help prevent these problems and ensure the safe and reliable operation of equipment. 3. Extend service life: Reduce the stress impact of residual magnetism on ferromagnetic components, thereby extending the service life of the equipment.

3、 Application scenarios

1. Transformer: Regularly demagnetize the transformer to prevent residual magnetism from affecting its excitation current and no-load losses. 2. Motor: For DC motors or synchronous motors, demagnetization can avoid poor commutation or vibration problems caused by residual magnetism. 3. Relay protection device: Ensure the sensitivity and reliability of the relay protection device, and avoid residual magnetism causing misoperation.

XZTZ4000 Power Quality Analyzer