Coordinate potentiometer. How the phase angle is measured in polar type potentiometers. It is measured from the position of phase shifter. Name some ac potentiometers. Drysdale Tinsley potentiometer Gall Tinsley potentiometer State the advantages of ac potentiometers. Can be used for m/s of both magnitude and phase angle Can be used for m/s of inductance of the coil. It is used in m/s of errors in CTS the applications of ac potentiometers. M/s of self inductance. Ammeter calibration Voltmeter calibration Wattmeter calibration. State the advantages of instrument transformers. Used for extension of range Power loss is minimum High voltage and currents can be measured. State the disadvantage of instrument transformers. Cannot be used for dc measurements. What are the constructional parts of current transformer? Primary winding Secondary winding Magnetic core. Name the errors caused in current transformer. Ratio error Phase angle error Define ratio error. The ratio of energy component current and secondary current is known as the ratio error. How the phase angle error is created.
Coordinate potentiometer. How the phase angle is measured in polar type potentiometers. It is measured from the position of phase shifter. Name some ac potentiometers. Drysdale Tinsley potentiometer Gall Tinsley potentiometer State the advantages of ac potentiometers. Can be used for m/s of both magnitude and phase angle Can be used for m/s of inductance of the coil. It is used in m/s of errors in CTS the applications of ac potentiometers. M/s of self inductance. Ammeter calibration Voltmeter calibration Wattmeter calibration. State the advantages of instrument transformers. Used for extension of range Power loss is minimum High voltage and currents can be measured. State the disadvantage of instrument transformers. Cannot be used for dc measurements. What are the constructional parts of current transformer? Primary winding Secondary winding Magnetic core. Name the errors caused in current transformer. Ratio error Phase angle error Define ratio error. The ratio of energy component current and secondary current is known as the ratio error. How the phase angle error is created.