Institute of Electrical and Electronics Engineers (IEEE)
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ANSI/IEEE Std C57.13.1-1981
Scope
A description is given of field-test methods that will ensure that the current transformers used as a source of relay input current are connected properly, are of marked ratio and polarity, and are in condition to perform as designed both initially and after a period of service. The standard covers safety considerations; current transformer types and construction and the effect of these on test me...