Test and Calibration of Optical Electric Current Transformer
Guo Zhi-zhong · Dianli xitong zidonghua · 2005
The structure and interface of typical optical electric current transformers are described. Because the traditional calibrating method is not suitable for testing optical electric current transformer, a novel test system is designed based on the IEC standard and error analysis theory. The virtual instrument technique is applied, so that the test system can be modified and extended flexibly. It is pointed out that every part of the reference channel should be evaluated by an authoritative institution, and the tiny error principle should be abided by. This test system has been successfully used to test the performance of the optical electric current transformer developed.