ELECTRIC MOTOR TROUBLESHOOTING

The life of a three-phase stator winding can be shortened dramatically when the motor is exposed to unfavorable operating conditions — electrical, mechanical or environmental.

It’s one thing to identify the component that’s failed and another thing to isolate the cause of that component failure. Yet determining the cause is a critical step in protecting your motors.

Failures are shown here to help identify the causes of failure, so that, where possible, preventative measures may be taken

00:00 – intro
02:32 – single phasing of motor
04:04 – single phasing of star connected motor
10:14 – single phasing of delta connected motor
12:38 – phase to phase winding short
17:42 – winding turn to turn short
18:42 – winding with shorted coil
19:15 – grounded winding at the edge of slot
21:09 – grounded winding in the slot
21:50 – shorted connection

UNDERSTANDING POWER QUALITY:    • UNDERSTANDING POWER QUALITY ISSUES_VO...  
   • ELECTRIC MOTOR SYSTEM RELIABILITY Part 1  
   • POWER QUALITY ISSUES_HARMONICS  
ELECTRIC MOTOR VIBRATION ANALYSIS:    • ELECTRIC MOTOR VIBRATION MEASUREMENT ...  
ULTRASONIC BEARING GREASING:    • ULTRASONIC BEARING GREASING ON MOTORS  
ELECTRIC MOTOR SYSTEM INFRARED INSPECTION:    • INFRARED THERMOGRAPHY ON ELECTRIC MOTORS