Hi All,
Share problem, A genset #1 500 kVA/380VAC LL/50hz with the alternator has fail to supply voltage, check and found on alternator exciter rotor winding damaged, so repair the alternator by rewinding. Before the alternator damaged all synchronizing and loadsharing has no problem, just because the environment - humid and dusty the alternator damaged. After repaired test the set single, voltage 380 L-L balanced then parallel and loadshare (with genset #2 800 kVA/380 VAC LL/50 hz) on 30% load and 0.7 cos phi, ampere read G#1 for U-V-W is 500 amps/phase and neutral amp is 100 amps (high). for G#2 30% load 0.7 cos phi, the U-V-W amps is 825 amps/phase and neutral amps is 5-10 amps.
I suspect that the alternator not wind correctly, so we cannibalize the G#1 alternator with the same size and test load at parallel, the G#1 neutral amps is below 10 amps at same load as previous test.
So please kindly advise what could be wrong with the alternator that has rewinding.
Thanks in advance
Neutral Current is High
Re: Neutral Current is High
