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Connection For Vfd To 2 Speed Motor


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#1 niravshah

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Posted 17 June 2010 - 07:51 AM

Dear All,

we have project which has 2 speed motor make siemens & Name Plate rating as per below:

Delta - 67/90/125 0.82 Cos Phi 735 RPMStar - 92/120/150 0.93 Cos Phi 1475 RPM

there is 9 lead termination in motor for high & Low speed but there is no any documetation available for motor wiring.
These motor has been working on MCC Panel as star - delta contact logic.
now customer wants to connect VFD on these Motor.
There is continous current 110 A in three leads & 6 leads 50 A available on full load of motor running condition.
If any body have detail wiring of these 9 Leads terminal to connect with VFD Three connection U, V & W than help me.




#2 jOmega

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Posted 17 June 2010 - 06:09 PM

QUOTE (niravshah @ Jun 17 2010, 02:51 AM) <{POST_SNAPBACK}>
Dear All,

we have project which has 2 speed motor make siemens & Name Plate rating as per below:

Delta - 67/90/125 0.82 Cos Phi 735 RPMStar - 92/120/150 0.93 Cos Phi 1475 RPM

there is 9 lead termination in motor for high & Low speed but there is no any documetation available for motor wiring.
These motor has been working on MCC Panel as star - delta contact logic.
now customer wants to connect VFD on these Motor.
There is continous current 110 A in three leads & 6 leads 50 A available on full load of motor running condition.
If any body have detail wiring of these 9 Leads terminal to connect with VFD Three connection U, V & W than help me.





If I was faced with this problem, I know the first place I'd go to for information would be .............. S I E M E N S .....
(but maybe that's too difficult dry.gif )




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