Testing a three phase motor and what voltage to use when doing a insulation resistance test (IR)

ledge.
_approved So peeps another day another breakdown, what we got here is a three phase water pump which is part of a combi. Every time it started up it was take out the RCD feed got to the route of the break down by two test I carry out on three phase 1. Checking the resistance across the three phases checking we have balance load 2. Insulation resistance IR checking we have no break down in insulation of the windings leading to voltage leakage phase to phase or down to earth. There's always talk about what voltage should be use when insulation resistance checking should it be 250 volts or 500 volts I always go by rule of thumb three phase I go by 500 volts but if you have any sensitive parts like PCB definitely use 250 volts don't want to start burning circuits out. #threephase #insulationresistancetest tested#engineering #ledgeapproved #ledge #electricalstudent #electricianproblems #technology #electricianproblems#electricalfault #electricalfaultfinding #electricaldrawing #electrcalwiring #breakdown #apprenticesparky #apprenticeelectricianlife #apprenticeengineer #fluke1587fc#electricianapprenticeship #electricianstudent #engineerapprentice