PCT701 Customized Precision Current Transformer

Electrical Specification

(Customized is available)

Rated Primary Current	5A
Max Primary Current	50A
Rated Secondary Current	2mA
Accuracy	0.1~2.0
Electrical Strength	3000VAC 1mA60s
Load Resistance	20Ω
Rated Frequency	50/60HZ

From the principle of current transformers, it is known that the ratio of the primary turns to the secondary turns is what determines the transformation ratio of the current transformer. The key reasons that endanger the transformation ratio error of the current transformer are:

(1) The size of the transformer current, the ratio difference The sum angle difference expands with the decrease of the secondary current;

(2) the size of the secondary load, the ratio difference and the angle difference decrease with the decrease of the secondary load;

(3) the power factor of the secondary load of the current transformer, accompanied by the secondary load The expansion of the power factor, the reduction of the ratio difference and the expansion of the angle difference;

(4) the harm of the switching power supply frequency;

(5) Other factors. The main internal parameters of the current transformer are also likely to cause the transformation ratio error, such as the characteristic impedance of the secondary electromagnetic coil, the core cross section, the core material, the number of secondary turns, etc., but it is determined by the design plan and manufacturing decision.