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Your problem could possibly be that the step up transformer is of a cheep construction and is probally "primary turn compensated". this would cause the voltage to drop when a 150% load is applied. This transformer 2400/480 Y:Y was manafactured for stepdown applications. See if I am correct...

The Utility is required to provide calibration proof when a dispute arises. But if you still want to go thru the expence of renting equiptment, go fetch at this web site.US and Canada only...

Mr. Magoo2 Go to this site for more info on ground testing. http://ecmweb.com/grounding/electric_ground_testing_techniques/ wt

Thanks LWS, I'm with you in your statement that gross defects can go undetected in a DC Hi-Pot Test. Just like the "Treeing Effect" was not discovered in cross-linked pe for several years after that kind of cable was on the market and installed all over the country. My main concern, is...

The simple way to determine the polarity of the windings Ie: start and finish, is the inductive kick method. 1> Tools Needed---One old Simpson Multimeter, a 6 volt lantern battery,some gator clip jumpers and a book of tape on numbers. 2> Proceedure---Identify the three pair of leads with...

The measured currents were all about the same. The current did have a downward trend.(ie:1-15 min) The cable under test had a insulating level of 133%. What gets me there were two other complete circuits and the test results were similar. Poor workmanship is out of the question, I personally...

The readings were in the range of 60ua after 15 min. Normal readings for this type of cable and environmental conditions would be about 15 ua max. Thank You for responding...

Recently while the contractor was Hi-Pot testing some newly installed 15 KV solid dielectric(EPR) cable, I noticed that he was getting high readings that I don't quite understand. The runs of cable were 3-1/c in the same duct about 4000 ft.in length with 12 X 3 Raychem splices and Raychem...