The water-cooled rotor winding is measured with a megger or other instruments of 500V and below, and the insulation resistance value should not be less than 5000Ω;
In-water cold rot windings are measured using a 500V or less megameter or other instrument, and the insulation resistance value should not be less than 5000?
The insulation resistance value shall not be lower than 5000 Ω when the inner water cooling rotor winding is measured with a 500V or less megger or other instruments;<br>