Allowed operation mode of Electrical Current Transformer

(1) Allowable operating capacity. The Electrical Current Transformer should operate within the rated capacity specified on the nameplate. If the operation exceeds the rated capacity of the nameplate, the accuracy will be reduced, the measurement error will increase, and the meter reading will be inaccurate. This is the same as the voltage transformer.

(2) Allowable current on the primary side. Electrical Current Transformer primary side current allows long-term operation under 1.1 times the rated current. Long-term operation and overload operation will increase the measurement error and cause the winding to overheat or damage. The secondary side current of the Electrical Current Transformer is generally 5A or 1A, and the commonly used is 5A. During normal operation of the Electrical Current Transformer, its secondary circuit is close to a short-circuit state.

(3) The secondary side of the Electrical Current Transformer cannot be opened during operation. If the secondary side of the Electrical Current Transformer in operation is open, high voltage will appear on the secondary side, which will endanger the safety of secondary equipment and personnel. If the work needs to disconnect the secondary circuit (such as removing the instrument), before disconnecting, the secondary side terminal should be reliably shorted with a connecting piece.

(4) Both the secondary side and the iron core of the Electrical Current Transformer should be reliably grounded. (Prevent the primary high voltage from entering the secondary side when the primary and secondary insulation breakdown)

(5) The load impedance of the secondary side shall not be greater than the rated load impedance (to ensure the accuracy of the measurement)

(6) When wiring the Electrical Current Transformer, pay attention to the polarity of its terminals

(7) TA must not be connected to the secondary side of the TV (so as to avoid the risk of high voltage due to the approximate open circuit of TA)

(8) When working, someone must be supervised, use insulating tools, and stand on insulating mats.