12/22/2010 2:41 PM | |
Joined: 6/4/2008 Last visit: 5/10/2024 Posts: 1484 Rating: (322)
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Hi saathiksyed, Bad news, unfortunately Frame Size A to C is generally not repairable (11kW is a FS C). Repairsonly feasible from Frame size D to Px. What were the conditions when the drives failed, were they running at the time? Power supply fluctuations can cause failures of drives, but obviously it has to be quite a large spike/interference. Are the units filtered or fitted with any chokes? Do the drives start the motors from standstill, or are the blowers turning already due to any airflow? The reason you can see 540VDC on the DC Link is the rectifier section of the drive is automatic, i.e. if 400VAC is present, it will produce DC. Best regards, Graeme |
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