Merlin Gerin RCBO options?

pc1966 · Jul 9, 2022

I suspect this has already been covered, but just wanting to check if the Schneider C60H RCBOs are OK for use in a 1990-era MG board:

[ElectriciansForums.net] Merlin Gerin RCBO options?

pc1966 · Jul 9, 2022

OK, a quick check shows they have been discontinued, so anyone (probably @westward10 ) know if Schneider has a current RCBO that is compatible with the above board?

Yes, I know a new board might work out cheaper than a few RCBOs but would like to check first as it was a good product in its day.

westward10 · Jul 9, 2022

Schneider Acti 9 iC60H fit the Multi 9 boards.

pc1966 · Jul 9, 2022

westward10 said:
Schneider Acti 9 iC60H fit the Multi 9 boards.

Looking at pictured of them they lack a flying neutral lead but have some clip, presumably the "plug on neutral (PoN)" feature. Any idea how that would be handled with an older board like the above?

For example:

32A Single Pole and Neutral 1 Module B Curve 10kA 30mA Type A RCBO

Neutral position left

www.cef.co.uk

westward10 · Jul 9, 2022

Not seen them like that they normally have neutral and functional earth fly leads.

Acti9 iC60 RCBO | Schneider Electric UK

Schneider Electric UK. Browse our products and documents for Acti9 iC60 RCBO - Residual current circuit breaker with integrated overcurrent protection (RCBOs)

www.se.com

Vortigern · Jul 9, 2022

Think I have a couple of them and replaced quite a lot of those merlin gerin with them. Pretty straghtforward, and they do have the leads as @westward10 said. I think I bought them for about £60 each.

pc1966 · Jul 9, 2022

Ok seems to be more than one in the range. Still, it is looking like a new board is probably a better bet, more so as the 2nd CU is Memera 21 and probably no sane options for RCD either.

It is a rather odd set up, the MG board on the ground floor feeds the 1st floor via some 16mm T&E from the 63A MCB, but the 1st floor board then feeds some of the ground floor as well (also it feeds the top/attic floor).

Aaron b · Jul 10, 2022

I was told the acti9s would fit but in comparison the bottom terminal doesn't line up exactly. A BG breaker looks like a better match to me...

HappyHippyDad · Jul 10, 2022

I've fairly recently used some acti 9's in the same board as the one you have pictured @pc1966 . They seem to be pretty much an exact match, as if they have been rebranded (this is a guess though).
I have 2 RCBO's spare if you'd like them (No charge) as I hardly ever work on these boards.

freddo · Jul 10, 2022

The plug on neutral type is not compatible, you need the flylead type. I would also recommend replacing the board, merlin made good stuff but its quite common to find the older boards have plastic parts that are deteriorating and have gone brittle. The iso sliders can far apart when operated, MCB dinrail clips crumble and the clips that hold the busbar assembly to the pan backplate can fail.

Aaron b · Jul 10, 2022

Aaron b · Jul 10, 2022

pc1966 · Jul 10, 2022

freddo said:
I would also recommend replacing the board, merlin made good stuff but its quite common to find the older boards have plastic parts that are deteriorating and have gone brittle.

That as another nagging feeling. I have also had the odd bit of older stuff fail when trying to fix it due to brittle plastic, and I found a split blanking cover as well suggesting someone broke it trying to do something in the not too distant past.