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Quazi Haque
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Joined: 8-August 07
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Last Seen: 22nd August 2007 - 05:08 AM
Local Time: Jan 9 2009, 06:14 AM
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8 Aug 2007
Can someone please answer why Thyristors in Soft starters burn?
We are using a 400 KW AC3 (690V 60Hz) rated soft starter to start a 300KW (690V 60Hz) motor. Power is supplied by a 750KVA Generator set. The soft starter is configured according the motor datasheet. The soft starter manufacturer is saying that we have to use power form the grid; the generator set is not big enough for this application. I don't quite understand the reason though. The motor starts with no load. Soft starter is bypassed using a bypass contactor after top of ramp is reached. So far four soft starters are burnt during testing with seperate motors. |
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Lo-Fi Version | Time is now: 8th January 2009 - 08:14 PM |
