Megger is the manufacturer of current transformer excitation, ratio and polarity test set., model cter-91. The product helps in testing while mounted in transformers, oil circuit breakers or switchgear without moving bushings and cts. The product uses the voltage-comparison method that provides a variable-voltage output up to 1000 volts and precision instrumentation for testing single and multi-ratio cts. The current transformer excitation, ratio and polarity test set carry on tests mounted in transformers or switchgear and tests without changing leads.
