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Motor Starting Problems |
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 Dec 6 2009, 06:22 PM
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#1
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 Group: Members Posts: 1 Joined: 6-December 09 Member No.: 7,267  |
Hi, I am having problems with a 230v 3ph 10hp baldor motor on a compressor.
The problem is that it burns up the contacts (blows them apart). I have ran it on the contact starter that came with it for a few months and I started having problems with a 40 amp contactor so i switched to a 50 amp and it lasted about a week. I checked voltage at the panel and it was 240 across the phases. The motor requires 28 amps, the latest suggestion was to go tos nema 2 rated box but it will cost 2 times the price of the motor! Any help will be much appreciated. Thanks Fredster |
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Dec 12 2009, 08:16 AM
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#2
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Junior Member Group: Members Posts: 3 Joined: 22-November 09 Member No.: 7,159 |
welcome
I think , your problem with contactor ( it is not good ) , if the voltage 240 , because this voltage is normal but when voltage become high , in that time you can to drop it by : 1- by control on the tap changer of transformer 2- by using stabilizer( it cost ) and thanks |
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Dec 12 2009, 09:52 AM
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#3
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Member Group: Full Member Posts: 78 Joined: 13-June 09 Member No.: 5,502 |
[quote name='fredster' date='Dec 6 2009, 07:22 PM' post='10534']
Hi, I am having problems with a 230v 3ph 10hp baldor motor on a compressor. The problem is that it burns up the contacts (blows them apart). I have ran it on the contact starter that came with it for a few months and I started having problems with a 40 amp contactor so i switched to a 50 amp and it lasted about a week. I checked voltage at the panel and it was 240 across the phases. The motor requires 28 amps, the latest suggestion was to go tos nema 2 rated box but it will cost 2 times the price of the motor! Any help will be much appreciated. Thanks Fredster [/quoteHello/ Hello. Maybe the compressor is needing now an overhaul, or it now is made to start with a higher dP accros it (such as the starting differential may have been decreased for instance). |
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