Current Transformer Calibration Switch (CTCS)


Meant for testing of instrument-class current transformers, CTCS includes input scaling converters (instrument CTs) and commutation unit.

Its circuit provides that 2 currents (from the reference CT & CT-under-test) are measured and compared.

With Energomonitor 3.3T1, CTCS makes it possible to measure ratio and angle errors of instrument current transformers of 0.2S accuracy class with nominal secondary current 1A or 5A.