Three phase motor ko kesay test keya jata hay k motor thek hy ya kharab hy to boohat he asan treky say aaj men apko samjhany wala hon.
es test ko ap test lamp say bhe kar sagty hen or multimeter say bhe kar sagty hen
The basic steps to check three-phase AC motor
General Inspections - Earth Continuity and Resistance Test - Power Supply Test - AC Motor Winding Continuity Test - AC Motor Winding Resistance Test - Insulation Resistance Test - Running Amps Test - continuity test - resistance test - ground test

Earth Continuity and Resistance Test
With a multimeter, measure the resistance between motor frame (body) and earth.
AC Motor Winding Continuity Test
Using a multimeter, check the continuity of motor winding from phase to phase ( U to V, V to W , W to U ).Each phase to phase must have a continuity if winding is OK. If any particular phase fails the continuity test, your motor is probably burnt.
Please see how to identify three phase windings for proper winding identification. U, V, W is a European winding designation.
AC Motor Winding Resistance Test
Check the motor winding resistance or ohms reading using a multimeter or ohmmeter for phase to phase terminal ( U to V,V to W ,W to U ).The ohms reading for each winding must be the same (or nearly the same). Remember that the three phases have identical windings or nearly so!
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Three phase motor testing with multimeter | How to check 3 phase motor| continuity resistance test
#motortesting #3Phasemotor #motorwinding
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