Megger MFT1730 Code LPE

[CraigB]

In have just tried to perform a RCD test on a split load domestic board, the meter didn't trip the RCD on with of the RCD's, at either a point in the property or at the board, the Ze is good, the meter display showed the voltage in large on the bottom reading, then in the small display above that normally shows the frequency had the letters LPE I have tried the meter on another RCD and all was fine, can anyone shed any light on this please?

 

[telectrix]

LPE could indicate a poor readingof sorts between L and E. the problem i think, lies within the installation, not your megger.

 

[Lister1987]

LPE suggests Line to Protective Earth
Wrong knob selection would be my guess?

 

[MeggerTSG]

Did you try the ramp test on the offending RCD Would be interesting to see the result

 

[CraigB]

Did you try the ramp test on the offending RCD Would be interesting to see the result

Hi Yes tried that. Meter went up to a reading of 46 and didn’t trip
[automerge]1588259637[/automerge]

LPE could indicate a poor readingof sorts between L and E. the problem i think, lies within the installation, not your megger.

 

[MeggerTSG]

As the ramp test showed a result of 46mA with no trip would indicate an issue with that RCD especially as the other RCD in the board tested fine. Even a brand new boards can have faulty RCDs!