PME & Broken neutral

[Knobhead]

I know some countries use protection to guard against a broken neutral in PME systems.
Anyone know how they work?

 

[snowhead]

There was a post recently on here where someone posted a drawing showing it.

RCD before the N to E connection??

 

[Knobhead]

I thought along those lines but it’s prone to imported faults

 

[Edd]

I know some countries use protection to guard against a broken neutral in PME systems.
Anyone know how they work?

Acording to E54 it never happens, so why bother.

 

[Knobhead]

It happened to my house years back.

 

[Edd]

seen it 3-4 times now, last time it had taken out the flexy hoses under the kitchen sink, when they turned the shower on! scarry stuff. but hey they had a good Ze

As snowhead says wonder why they dont fit a 100A 500ma RCD before the NE join.

 

[plugsandsparks]

Doesn't the white wire on the RCD help with this?

 

[Jimmy Boy]

Speak to the DNO ask them if you can fit an Earth Rod as a back up they will probably say no but do it anyway lol
J

 

[Sintra]

Speak to the DNO ask them if you can fit an Earth Rod as a back up they will probably say no but do it anyway lol
J

That is the way it is done in some countries an external electrode is connected to the N / E juncture within the service head.

 

[plugsandsparks]

Just checked the schneider site and they do an under-voltage module for their C60 din stuff, that may do it