Question

How we can perform open circuit voltage ratio test on slip ring induction motor,please give correct circuit diagram for this test

Answer 1

A Slip Ring induction motor can be started with external resistance added in its rotor circuit. ... As these motors have external resistance connected to its rotor circuit, the ... There might be also an interlock provided to ensure the proper sequential ... voltage when the rotor is not rotating and gives the measure of turns ratio ...

Slip ring induction motor starter: (i) Rotor Resistance starting: • This method of starting can not be used for squirrel cage induction motor because external resistance ... Open-circuit and short circuit tests are performed to determine the circuit constants, ... These tests give more accurate results than those obtained by taking  the time