How to use Electrical Current Transformer correctly

1. The wiring of the Electrical Current Transformer should follow the principle of series connection, that is, the primary winding should be connected in series with the circuit under test and the secondary winding should be connected in series with all the instruments.

2. Choose the appropriate method according to the measured current, otherwise the error will increase. The colleague's secondary test end must be grounded to prevent the primary side high voltage from entering the secondary low voltage side once the insulation is damaged, causing personal and equipment accidents

3. No open circuit is allowed on the secondary side. An open circuit on the secondary side causes E2 to reach hundreds of volts, causing an electric shock if touched. Therefore, the secondary side of the Electrical Current Transformer is equipped with a short-circuit switch to prevent the primary side from opening.

4, in order to meet the needs of measuring instruments, relay protection, circuit breaker failure judgment and fault recorder. Electrical Current Transformers with 28 secondary windings are installed in circuits such as generators, transformers, outlets, bus section circuit breakers, bus tie circuit breakers, bypass circuit breakers, etc.

5. The installation location of the Electrical Current Transformer for protection should be set up as far as possible to eliminate the unprotected area of the main protection device.