Posted by John B [108.162.216.121] on Wednesday, December 11, 2019 at 09:02:09 :
In Reply to: Re: Paging Tom Petroff posted by Tom Petroff (IL) [162.158.74.24] on Tuesday, December 10, 2019 at 20:25:00 :
Yes, the high voltage regulator could be stuck in a high position, and therefore not dropping back as the high load decreases.
If it is a pad mount transformer (on the ground) then it probably is built with several , maybe 6, taps on the high side winding. If the voltage is extra high the LDC (Line Distribution Company) / Power Provider would check it out and pick a higher tap on the high side. Yes by using a higher tap on the high side it lowers the voltage on the low side.
To simplify that let's say the length of the high side winding conductor is 1000 feet. Number 1 tap would be at 900 feet, "2 at 920' #3 at 940' #4 at 960' #5 at 980' and #6 (the end of the line) at 1000'. Therefore by picking a higher tap on the high side decreases the voltage on the low side. I would suggest having them check it out if the house power voltage is high. JJB.