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bonny
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27 years old
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INDIA
Born Aug-28-1981
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Joined: 3-August 07
Profile Views: 234*
Last Seen: 30th July 2008 - 06:43 AM
Local Time: Jan 7 2009, 06:51 AM
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29 Jul 2008
what are heating time constant & cooling time constant of induction motors.
14 Aug 2007
Sir,
I have a 4Pole,1.5 kW motor, FLC-3.4A, BMR Setting: 3A, Back up Fuse: 16A I have faced a problem of non-tripping of motor on unbalance current. Motor was taking unbalance current due to opening of Y-phase, but BMR didn't operate on unbalance and motor ran for more than 8 hours in this condition. We don't have any additional single phasing supervision relay. I think BMR should operate on unbalance. Am I right? If yes, then please tell me what is the operating range of a BMR on unbalance in terms of % of FLC.
3 Aug 2007
Sir,
In a contactor there are generally two readings 1) thermal current rating Ith, and 2) operational current rating what is the significance of thermal current rating , and which one is considered while selecting a contactor for a particular motor feeder. |
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26 Dec 2007 - 6:03
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Lo-Fi Version | Time is now: 7th January 2009 - 01:21 AM |
