Current Transformers Test Set

C.T. testing set is meant for determination of PHASE ANGLE ERROR AND RATIO ERROR OF Current transformer having secondary rated for 5 Amps. or 1 Amp. which are intended to be used on 50 Hz. The measurement is on principle of comparison and null indication on magnetic balance bridge.
The basic unit is sensitive magnetic comparator and also it incorporates electronic null detector to facilitate the balance. The reference Current 5A. or IA. obtained from Standard Current Transformer and in comparison to that the vector length and phase displacement is measured. The ratio error in percentage and phase displacement in minutes are directly compared and indicated on dials.