Mr. Wizard
Senior Member
- Location
- Texas
Happy early Thanksgiving everyone...please be safe. For the second time this week we've had a generator start up due to higher than normal voltage. We have two direct feeds to our facility from the poco, and the poco has a transformer vault on-site, where the high voltage is stepped down for our use. I've taken many voltage readings throughout the facility, and we're running a little "hot", meaning our nominal voltage between phases fluctuates between 490 to 503 volts. Our ATS's automatically fire the generators when poco voltage hits 528 volts, and the info from the data screen on the ATS's indicate that was the problem both times. My director called in Holt and their conclusion (which was the same as mine) is we need to get the poco involved in this to see why the incoming voltage is so high. My director disagrees and believes that Holt needs to fix the issue. Anyone out there have any similar issues in the past? Thanks in advance for any info