For a P.T. the transformation ratio is given by which of the following relation?(a) R = \(\frac{V_s}{V_p}\)(b) R = \(\frac{1}{V_s}\)(c) R = \(\frac{V_p}{V_s}\)(d) R = VpThis question was posed to me by my college professor while I was bunking the class.This key question is from Ratios of Instrument Transformers topic in division Extension of Instrument Ranges of Electrical Measurements

For a P.T. the transformation ratio is given by which of the following

1.	For a P.T. the transformation ratio is given by which of the following relation?(a) R = \(\frac{V_s}{V_p}\)(b) R = \(\frac{1}{V_s}\)(c) R = \(\frac{V_p}{V_s}\)(d) R = VpThis question was posed to me by my college professor while I was bunking the class.This key question is from Ratios of Instrument Transformers topic in division Extension of Instrument Ranges of Electrical Measurements
Answer» Correct CHOICE is (c) R = \(\FRAC{V_p}{V_s}\) The explanation is: In a potential transformer, the transformation ratio is given by the ratio of the magnitude of the actual primary CURRENT to the magnitude of the actual secondary current. R = \(\frac{V_p}{V_s}\) where, R is the transformation ratio Vp is the actual primary WINDING VOLTAGE Vs is the actual secondary winding voltage.

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