Testing Techniques for Protection-Class Current Transformers

Dinesh Chhajer and Sughosh Kuber Features, Winter 2020 Features

Relaying current transformers serve as critical components in the design of a protection scheme. CT performance under fault conditions should be within its operating characteristics for a true representation of fault magnitudes and reliable operation of the protection scheme. To ensure proper installation and operation, CTs are often subjected to one or more tests performed in accordance with standards including …