with model cter-91 current transformers can be tested while mounted in transformers, oil circuit breakers breakers or switchgear - without moving bushings and cts. using the voltage-comparison method, model cter-91 provides a variable-voltage output up to 1000 volts and precision instrumentation for testing single and multi-ratio cts.
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megger cter-91 current transformer excitation, ratio and polarity test set
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