The secondary rated capacity of current transformer is larger than the actual secondary load, the actual secondary load should be 25 ~ 100% of the secondary rated capacity.

Capacity determines the secondary side of the load impedance, load impedance and affect the measurement or control accuracy. The load impedance is mainly affected by the resistance of the measuring instrument and relay coil, the reactance and the contact resistance of the connection, and the resistance of the secondary connection wire.

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