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dougc
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auckland nz
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Joined: 6-June 02
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Last Seen: 7th July 2008 - 07:02 PM
Local Time: Jan 7 2009, 01:28 PM
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19 Jun 2002
have been having a few problems with motors burning out when used in conjunction with vsd drives. this particular installation has 3# 5.5 kw 4 pole motors driving fans, all connected to one drive. on dissassembly of motors it was found that the motor closest to the drive had compleatly burnt out one phase, on the next closest motor only 3 coils of one phase had burnt out and the last motor had one coil completly burnt out ond the second coil shown signs of over heat.
the other two phases of all the motors are in perfect condition. all the motors are delta connected and all have the same phase rotation. each motor has its own thermal overload. this is now the third time these motors have failed with the same fault. has any one got any clues or had a simular problem. kind regds |
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Lo-Fi Version | Time is now: 7th January 2009 - 01:28 AM |
