Three Requirements for Electrical Current Transformer Wiring

①Electrical Current Transformer secondary side is not allowed to open circuit

The secondary open circuit may have serious consequences, one is that the iron core is overheated, and even the transformer is burned; the other is that due to the large number of turns of the secondary winding, a dangerous high voltage will be induced, endangering the safety of people and equipment.

②The secondary side of the high-voltage Electrical Current Transformer must be grounded a little

Since the primary side of the high-voltage Electrical Current Transformer is high-voltage, when the high-voltage breakdown occurs between the primary and secondary coils due to insulation damage, the high-voltage will enter the low-voltage. Personal and equipment safety. But it should be noted that the secondary circuit of the Electrical Current Transformer only allows one point to be grounded, and no more grounding is allowed, otherwise it may cause shunting and affect the use.

③The secondary coil of the low-voltage Electrical Current Transformer should not be grounded

Due to the low voltage of the low-voltage transformer, the degree of insulation between the primary and secondary coils is large, and the possibility of breakdown of the primary and secondary coils is small. In addition, the ungrounded secondary coil will make the secondary circuit and the instrument The insulation capacity is improved, and the accident of the instrument being burned by lightning can also be reduced.