How Zero Sequence Current Transformer Does Equipment Maintenance

Zero Sequence Current Transformer has the characteristics of high flexibility, good linearity, reliable operation and convenient equipment. The function of the Zero Sequence Current Transformer is better than that of the ordinary Zero Sequence Current Transformer, and the application scheme is more extensive, not only for electromagnetic relay protection, but also for electronic and microcomputer maintenance equipment. Users can effectively ground the neutral point according to the operating method of the system. Or if the neutral point is not effectively grounded, select the corresponding Zero Sequence Current Transformer.

The basic principle of Zero Sequence Current Transformer current protection is based on the rule: the algebraic sum of the incoming current flowing into any node in the circuit is equal to zero. Under the normal condition of the line and electrical equipment, the vector sum of the currents of each phase is equal to zero. Therefore, the secondary winding of the Zero Sequence Current Transformer has no signal output, and the execution element does not act. When the grounding defect occurs, the vector sum of the currents of each phase is not zero, the defect current causes magnetic flux to be generated in the ring core of the Zero Sequence Current Transformer, and the induced voltage on the secondary side of the Zero Sequence Current Transformer causes the actuating element to act, and the strand moves out. Buckle the device and switch the power supply network.