What problems should be paid attention to during the operation of Electrical Current Transformer

①Electrical Current Transformer must not open the secondary side during operation. Once the secondary side is open, it will burn out due to excessive iron loss and high temperature, or the secondary winding voltage will rise and the insulation will be broken down, resulting in the danger of high-voltage electric shock. Therefore, when exchanging the meter, such as exchanging ammeter, active meter, reactive meter, etc., the current loop should be short-circuited first, and then the metering meter should be exchanged. When the meter is adjusted, first connect it to the secondary circuit, then remove the shorting wire and check whether the meter is normal.

②If sparks are found when the short-circuit is removed, the Electrical Current Transformer has been opened at this time, and the short-circuit should be re-shorted immediately, and the short-circuit can be removed only when it is confirmed that the circuit of the metering instrument is not open-circuited. When removing the Electrical Current Transformer short circuit, you should stand on the insulating pad, and consider deactivating the protective device of the Electrical Current Transformer circuit. After the work is completed, the protective device can be put into operation.

③If the Electrical Current Transformer has a buzzing sound, check whether the inner iron core is loose, and tighten the iron core bolts. At one end of the secondary side of the Electrical Current Transformer, the shell must be grounded reliably.

④When the insulation resistance of the secondary coil of the Electrical Current Transformer is lower than 10~20 megohms, it must be dried to restore the insulation before use.