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Show me how to diagnose line voltage distortion using a multimeter and a scope

Scenario:

A variable speed drive on a critical system, the fault indicator LED is on.

According to the VSD (variable speed drive), the error code is F4; the drive has detected an "under voltage" condition and shuts down.

  • How do you identify if the failure is in the drive, in the motor or in a distorted supply voltage?
  • Show me how to diagnose line voltage distortion using a multimeter and a scope.
  • View this video to find out more (.swf) »
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