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Current Transformer Converter Ratio
Sep 01, 2018

Current transformer converter ratio:

The ratio of primary rated current I1n to secondary rated current I2n of current transformer is called rated converter ratio of current transformer, Ki = I1n / I2n N2 / N1.

Type N1 and N2 are the turns of primary and secondary windings of current transformers. Two.

Current transformer primary side rated current standard ratio (such as 20.30, 40, 50, 75.100, 150 (A), 2Xa / C) and other specifications, secondary side rated current is usually 1A or 5A. 2Xa/C indicates that there are two current ratios for the same product. It is realized by changing the connection mode of the connector outside the oil tank at the top of the product. When the current ratio is a/c in series and 2Xa/C in parallel. Generally speaking, the primary rated current I1n should not be less than the load current in the line (i.e. the calculation IC) when selecting the converter ratio of the current transformer for metering. If the current load of the circuit is 350A, the 400/5 of the current transformer should be chosen. To protect the accuracy of the current transformer, the protection ratio can be greatly improved.

Add: No.38 South Taoyuan Road, Yaozhuang Town,Jiashan County, Jiaxing City, Zhejiang Province, China
Contact person: Elva Zhuang&Sunny Ni
Tel:+86-573-84775555
Fax:+86-573-84776699
Phone:+86-13732570066
E-mail:
sales@great-relay.com