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The MVCT performs the ratio test by either selecting Ratio test in the Run All test configuration or using
the ratio test screen. User can also select manual Ratio test by selecting manual option and controlling
the secondary applied voltage.
3.2.2 Polarity Test
The Polarity test proves that the predicted direction of secondary CT current (leaving) is correct for a
given direction of primary current (entering).
CAUTION
In the ratio test screen or the manual operation, do NOT apply the voltage high enough
to the secondary of CT that would cause the CT to saturate; otherwise the readings will
not be accurate.
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