VFD problems motor not running?

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SUMMARY

The discussion centers on issues related to a Variable Frequency Drive (VFD) and a three-phase motor rated at 415 volts and 50 Hz. The user corrected tampered setup parameters, allowing the motor to gain control, but the motor remains unbalanced with phase measurements at 300 VAC instead of the expected 240 VAC. The user suggests that the unbalance may stem from either the VFD output or potential damage to the motor. The importance of using a true RMS voltmeter for accurate voltage measurement is also highlighted.

PREREQUISITES
  • Understanding of Variable Frequency Drives (VFDs)
  • Knowledge of three-phase motor operation
  • Familiarity with electrical measurements using true RMS voltmeters
  • Basic troubleshooting techniques for motor control systems
NEXT STEPS
  • Research VFD output balancing techniques
  • Learn about three-phase motor diagnostics and repair
  • Study the impact of VFD settings on motor performance
  • Explore the use of true RMS voltmeters in electrical troubleshooting
USEFUL FOR

Electrical engineers, maintenance technicians, and anyone involved in the operation and troubleshooting of VFDs and three-phase motors.

vsdguy
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Hi all,

I am new on the forum. I have a customer who is having some problems with running their motor with the VFD. I realized they had tampered with the setup parameters and luckily we corrected all the parameters. However, they have gained control on the motor, but the motor is unbalanced. The maintenance people are measuring between phases 300 vac instead of 240 vac. It's a three phase motor rated 415 volts at 50 Hz.
I told the customer that either the output from the VFD is not balanced or the motor might be damaged.
What else can I help to solve this problem?
Any help?
 
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Are they using a true rms voltmeter to measure the voltage? The VFD changes the wave...
 

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