Megger Question...

Prince1983 · Feb 12, 2014

Hi All,

does anyone know, when testing Ze on the Megger, and also getting the PFC at the same time, if the PFC provided is the higher of the PEFC and PSSC? ie, does it carry out both PFC tests simultaneously and provide worst case result or does it just test for the PEFC? Thanks in advance! Ps, I hope the question is clear!

telectrix · Feb 12, 2014

which megger do you mean? on the 1552/3, it's a 2 wire test so you measure either pefc or pscc, 1 or the other, depending where you put your leads.assuming you are measuring Ze, then your leadsa are across L -E and so the fault current will be PEFC.

Prince1983 · Feb 12, 2014

On the 1730 it's a three lead test, hence confusion. But I think it tests all PFC combinations. Will call Megger now to confirm. Thanks.

Jay Sparks · Feb 12, 2014

You can normally find a manual for your Megger on a google search. Its a pdf and its free. It should tell you all you need to know.

Jay

Prince1983 · Feb 12, 2014

Thanks tel. You were right as usual! It only tests PEFC even on 3 lead so you still have to use the dial.

GLENNSPARK · Feb 12, 2014

fail, fail and fail again.

how can you measure an accurate PFC whilst carrying out a Ze?

think about where the main earthing needs to be during Ze...then during a PEFC test...

Hawkmoon · Feb 12, 2014

GLENNSPARK said:
fail, fail and fail again.

how can you measure an accurate PFC whilst carrying out a Ze?

think about where the main earthing needs to be during Ze...then during a PEFC test...

Bonding, bonding, bonding...