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The test voltage applied in the HV test of rotor winding of three-phase IM when it is subjected to be reversed or braked by reversing the primary supply while the motor is running is
1000 V + twice the rated voltage with a minimum of 1500 V
1000 V + twice the open circuit standstill voltage as measured between slip rings or secondary terminals
1000 V + four times the open circuit standstill secondary voltage
All of these
1000 V + four times the open circuit standstill secondary voltage
Practice and solve "The test voltage applied in the HV test of rotor winding of three-phase IM when it is subjected to b..." for Electrical - Economics for Engineers. The correct answer is Option C: 1000 V + four times the open circuit standstill secondary voltage. Detailed step-by-step solution, conceptual clarity, and formulas on Examoogle.
Option **(c) **
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