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Unbalance Load |
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 May 24 2008, 05:00 PM
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#1
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Junior Member  Group: Full Member Posts: 6 Joined: 19-May 08 Member No.: 4,570  |
Dear sir
pl;s be informed that wehave power transformer the measurment current display on the digital protection relay un balanced ( 380 ,150 ,380 A) but when we accumalted the all loads found the load balanced on the three phases (380 ,380 ,380) could you advise me what the reason for this strange problem. looking forward your kind replay as soon as possible osama |
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 May 31 2008, 03:58 AM
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#2
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 Member Group: Full Member Posts: 171 Joined: 3-September 04 Member No.: 861 |
QUOTE (osama ali @ May 24 2008, 08:00 PM)  Dear sir pl;s be informed that wehave power transformer the measurment current display on the digital protection relay un balanced ( 380 ,150 ,380 A) but when we accumalted the all loads found the load balanced on the three phases (380 ,380 ,380) could you advise me what the reason for this strange problem. looking forward your kind replay as soon as possible osama Hello Osama, My first line of action will be to check the CT. you can cross check the CT by checking the secondary current of CT with clampmeter and then multipliying with the ratio for example....if you read 4 amps on the secondary of CT and your CT ratio is 1000/5 then your primary currnt is 4 X 1000/5= 800 amps. Cheers |
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