TN-C-S extra grounding using ground rod

DIY
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1

In the Netherlands most grid connections are TN-C-S. Basically when installing an ESS, no real need to make things more complex and simply use the existing grounding.

I’m contemplating on adding a generator for emergency use only. Not by using a 4th Multi but by reconfiguring the existing ve-bus setup in such an emergency situation (set grid code to none, un-tick switch as group for the 3 phase setup, etc). The config switch would basically result in an off-grid/island mode only installation where grid N-L1-L2-L3 are switched to generator N-L1 (N - PE bound in transfer switch, not in generator as per recommendation).

So far, so good. But if the actual grid connection is somehow damaged I will end up with a bounded but not grounded generator connection. Not so good?

I still have a decent ground rod from when we first build the house. It was disconnected from the wiring closet in the house when the setup was released for use a long time ago. I have read that it is within standards to restore that connection by merging the ground rod connection with the TN-C-S ground for added safety.

DESS/ESS/Victron and generators aside. Anyone care to comment if my interpretation is correct ? Safety will increase by adding a ground rod to the TN-C-S connection from the provider at the entry point / central grounding terminals ?

2

Gebruik je de aardpen nu niet meer? Krijg je nu aarde van het Net?

Vanwege ess en de nieuwe plannen, laat je huidige aarde doormeten met een installatietester.

Ik ben elektromonteur en uit ervaring komt het niet zelden voor dat de aardpen een veel te hoge weerstand heeft..de aluminium koppeling tussen pen en de dikke koperdraad was dan volledig weg gevreten door kathodisch effect, tegenwoordig is die koppeling van ander materiaal.

De weerstand van een goede aardpen kan nogthans enorm verschillen: 100 Ohm of lager dan 1 Ohm, hier bij is het zo’n 12 Ohm.