Discuss Megger MFT PFC error message in the Electrical Forum area at ElectriciansForums.net

gazdkw82

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I used a friends Megger today and we both came up with an error he hasn't seen before.

We was performing a PFC test at the imcoming of a new DB.

Leads were in line and neutral ports and tester set to L-N, 2 lead test, Zmax.

As soon as you make the connection the tester beeped and flashed <PE>

We managed to get a reading but he didn't know what the error meant. Searching the internet doesn't seem to bring up much
 

static zap

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(pure speculation , does it want a PE reference to
confirm "polarity" )
...No I have yet to read that Meggers Instructions..
( So many "features" ... n-tweakable-settings
can get in the way sometimes )
 

westward10

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If it flashed PE this is likely to indicate user error.
 

Strima

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At a guess PE would refer to protective earth??? Possibly seeing the earth as a neutral?
 

Strima

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Can testers differentiate between an incorrect connection between N and E on a TN system assuming that is what it is.
I honestly don't know, just throwing an idea in the really confuse the mix... :D
 

Rob

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Can testers differentiate between an incorrect connection between N and E on a TN system assuming that is what it is.
Not with a 2 wire test they can't.

An they wouldn't really be able to prove a fault with 3 wire testing, but could flag a possible warning message if the resistance of one was out of a pre defined tolerance set in the tester.

I believe the <PE> fault you have seen, is an issue where it detects the touch voltage rising on a conductor above safe limits.

This could point to a fault on the DNO side of things, although only speculation. Call Megger an find out what the code means.

Edit: New batteries in the tester? Or if rechargeable, they weren't low?
 
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telectrix

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as Rob suggests, it would seem that PE would indicate a voltage on the PE. however, OP says he was using 2 leads L-N. possibly be a N not tied down to E due to a poor connection. I found 1 of those causing a high Ze. turned out the jumper from N-E in a PME head was loose.
 

Rob

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as Rob suggests, it would seem that PE would indicate a voltage on the PE. however, OP says he was using 2 leads L-N. possibly be a N not tied down to E due to a poor connection. I found 1 of those causing a high Ze. turned out the jumper from N-E in a PME head was loose.
This was my initial thought too.

Although a call to Megger an probably some more testing will be required.
 

buzzlightyear

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when testing on the megger ,which I think he has from previous posts the megger would show not connected if he has not connected write .
 

Midwest

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Haven’t my 1730 to hand nor instructions, but I neve selected Zmax when measuring Ze/PFC. That if I remember was measuring max Zs figures on a circuit.

There’s a guy at Megger Tchnical, Ian Bentsed or something like that. He’s the one to speak to about error codes and using their MFT’s.
 

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