About a year ago the power utility for my area replaced a supply transformer on a pole near my house. I assumed that the upgrade was because there were more houses being built in the street. At the same I noticed an improvement in the SQ of my system even though at first I did not relate the two. However after a while I thought that the only explanation was the new transformer.
Also a while ago I noticed even more so than the above that after 9.30 PM the SQ always improved. It had nothing to do with time of the year. So daylight saving and the solar panels on some adjacent houses stopped working was not a factor. There are no factories near me that might be stopping work. I often think bring on 9.30 PM
I have a small plug device that I used tonight to see the voltage going into my system. The voltage was between 250 and 255 volts which seemed high to me. All of a sudden it went down to 245-250 volts and stayed there. I looked at the time and it was just after 9.30 PM. Maybe the voltage drop explains the improvement after 9.30 PM.
Can the new supply transformer be responsible for an overall improvement in the SQ?
Is the voltage too high?
If so how do I get it down?
If I can easily get it down what is an optimum?
John