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VFD'S EARTHING TO ARREST EMC PROBLEMS

1/21/2010 4:15 PM	Rate (0)
payyavula Posts: 7 Rating: (0)	SIR, WE ARE HAVING 15 MM440 DRIVES ALL DRIVES & MOTORS&CABLES7MCC PANELSARE CONNECTED TO COMMON GRID EARTH COULD ANYBODY SUGGEST WHETHER WE NEED TO ISSOLATE VFD'S AND ITS MOTORS&CABLES FROM COMMON PLANT GRID EARTH?WHAT IS BEST WAY OF EARTHING VFD'S TO ARREST EMC PLEASE GUIDE US WITH REGARDS P.SRINIVASARAO
payyavula Posts: 7 Rating: (0)
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1/21/2010 4:30 PM	Rate (0)
JensS Posts: 739 Rating: (55)	Pls. have a look into the attachement Attachment EMC Installation.PDF (394 Downloads)
JensS Posts: 739 Rating: (55)
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This contribution was helpful to 1 thankful Users how come

1/25/2010 5:04 PM	Rate (0)
payyavula Posts: 7 Rating: (0)	Sir, Information provided by you is very useful to me but you have not givenyour remarks to my questionwhether earthing of vfd's connected to common grid earthing(all plant electrical system)done by us need to be changed or not ? we are getting fault70 frequently is there any posibility of bad earthing kindly help us with regards, P.Srinivasarao
payyavula Posts: 7 Rating: (0)
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1/26/2010 11:17 AM	Rate (0)
JensS Posts: 739 Rating: (55)	Hello, you didn’t mention f0070. F0070 on MICROMASTER 4 is a Profibus communications failure.A incorrect EMC installation could be the key to this fault; pls have a look into this FAQ: http://support.automation.siemens.com/WW/view/en/22329309
JensS Posts: 739 Rating: (55)
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