Transformer Demagnetization Tester Transformer Tester Residual Magnetism Removal 5A 1A 200mA 5mA| XHXC105A

The XHXC105A power transformer degaussing instrument is a special equipment for eliminating the hazards of residual magnetism after the DC resistance test of large power transformers and instrument transformers. It plays an extremely important role in protecting power transformers from the impact of excitation inrush current and ensuring safe operation.

Due to the inherent hysteresis phenomenon of ferromagnetic materials, residual magnetism remains in the iron core after operations such as voltage ratio and DC resistance measurements. When the transformer is put into operation, the residual magnetism saturates the transformer core for half a cycle and generates a large number of harmonics in the excitation current, which not only increases the reactive power consumption of the transformer, but may also cause relay protection devices to malfunction and cause economic losses. Therefore, degaussing must be performed before the transformer is put into operation to ensure safe and normal operation.

The XHXC105A adopts the DC attenuation frequency conversion principle. It uses the DC demagnetization method: the current amplitude decreases periodically, and the current polarity changes periodically, gradually shrinking the hysteresis loop and canceling the magnetic poles against each other, so as to achieve the purpose of demagnetization. In automatic mode, the system automatically demagnetizes in the sequence of 5A, 1A, 200mA and 5mA until the progress reaches 100%, then discharges automatically. For single-phase transformers, connect to terminals A and X; for three-phase transformers, connect only B and 0.