Strostkovy
Titanium
- Joined
- Oct 29, 2017
We had another power outage for a few hours this morning. After it came back on the compressor was tripping out with phase imbalance errors. Error logs show 50% less current on leg A, but only while the motor is unloaded. While loaded the phase imbalance is less than 50%.
I measured the power and it is fluctuating wildly by several volts, but one phase is always 4-6V lower.
The 40hp compressor pump sup the 400 gallon tank no problem, and then trips out within one minute of running unloaded. Is this 6V phase difference enough to cause that much current imbalance?
I have not yet checked the currents while it is running loaded. I did use a thermal camera on everything between the service entry and the motor and saw no hot connections, even though at a minimum 500 watts would have to be dissipated.
I measured the power and it is fluctuating wildly by several volts, but one phase is always 4-6V lower.
The 40hp compressor pump sup the 400 gallon tank no problem, and then trips out within one minute of running unloaded. Is this 6V phase difference enough to cause that much current imbalance?
I have not yet checked the currents while it is running loaded. I did use a thermal camera on everything between the service entry and the motor and saw no hot connections, even though at a minimum 500 watts would have to be dissipated.