Did you take you voltage readings with a load on the circuit? Especially The Powervar. Turn on all your equipment, then take a voltage reading at the wall outlet and the output of the Powervar. Let us know what the readings are then. Also when was the last time You had the Fluke calibrated for acuracy. It could be off 2 or 3 volts, maybe more.
One way you can usually tell if you have higher than normal voltage is you are constantly replacing light bulbs.
Jim
One way you can usually tell if you have higher than normal voltage is you are constantly replacing light bulbs.
Jim