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Rating Of Ac3 Contactors For Auto Transformer Motor Starting |
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 Dec 9 2009, 05:54 PM
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#1
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 Group: Members Posts: 1 Joined: 7-December 09 Member No.: 7,278  |
can any one help me to solve my problem
This is my problem I have to start 90KW air blower motor using auto transformer Having 50%, 65%, 80% taping. I use 5 contactors for controlling start operation. 1 for 65%tapping, 1 for 80% tapping, 1 for disconnecting transformer after completing startring operation, 1 for tr. star connecting and last one is main line contactor. How calculate contactor rating for this type starting. kks |
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Dec 11 2009, 05:27 PM
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#2
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Member Group: Full Member Posts: 78 Joined: 13-June 09 Member No.: 5,502 |
QUOTE (saheer @ Dec 9 2009, 05:54 PM)  can any one help me to solve my problem This is my problem I have to start 90KW air blower motor using auto transformer Having 50%, 65%, 80% taping. I use 5 contactors for controlling start operation. 1 for 65%tapping, 1 for 80% tapping, 1 for disconnecting transformer after completing startring operation, 1 for tr. star connecting and last one is main line contactor. How calculate contactor rating for this type starting. kks Hello. Why do not you want to use just one variable speed drive for your air blower motor? |
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