bryan77
Member
I have a question which is probably just theory related but couldnt find anything in search and didnt know what to look for online.
We have a 4kv to 480v transformers that feed some 480v switchgear that was recently installed. Of course there is a tiebreaker between the 2. We open the shutter and check voltage with the Fluke 87 to see if we are in phase. We get all the correct reading except A to A which reads 280v, out of phase we say.
The Engineer says it is a meter issue, so we get and Analog simpson meter and now read 0v A to A.
I found something about the inout impedance of the fluke and being a solid state device, but cant find something that explains it simply.
Can anyone help with an explanation or link.
Thanks a lot as I am new the the high voltage stuff.
We have a 4kv to 480v transformers that feed some 480v switchgear that was recently installed. Of course there is a tiebreaker between the 2. We open the shutter and check voltage with the Fluke 87 to see if we are in phase. We get all the correct reading except A to A which reads 280v, out of phase we say.
The Engineer says it is a meter issue, so we get and Analog simpson meter and now read 0v A to A.
I found something about the inout impedance of the fluke and being a solid state device, but cant find something that explains it simply.
Can anyone help with an explanation or link.
Thanks a lot as I am new the the high voltage stuff.