Requirements for measuring insulation resistance and absorption ratio of windings

Need to measure the winding in the overhaul and repair of the insulation resistance and absorption ratio, measurement requirements:

1 when the transfer and overhaul: the rated voltage is 1000V the insulation resistance should not be less than 0.5M. Rated voltage of 1000V above, in close to the operating temperature of the insulation resistance value, the stator winding is generally not less than 1M. The rotor windings should not be less than 0.5M.

2 minor self rule.

3 absorption ratio.

Explain

1 capacity 500kW above the motor should be measured to absorb ratio.

2.1000V following motor using 1000V, 1000V above the motor using the 2500V.

3 minor when the stator winding may be measured together with cable, together with the measurement of the rotor winding can boot device.

4 conditional, should be separated phase measurement.