RCCB in Series to MCB

[Elekk]

RCBO are available in single pole but I cannot find RCBO in triple pole. Shall I have to use a triple pole RCCB in series with a triple pole MCB?

 

[Apache]

What is the application?

 

[steptoe]

3 phase I assume?

 

[SPECIAL LOCATION]

3 phase I assume?

Steps....

you is gonna have to change you name to Sherlock Holmes!!!!

:xROTFWL:Salute

 

[Elekk]

The application is three phase water heater.

 

[septiclecky]

What make of MCB is it as if you it is a Eaton/MEM/Bill make then you can fit seperate RCD pods to this make.

 

[Andy™]

iirc, there are TP RCBO's available. cant remember the make though

 

[Lurch]

I was asked about these Yesterday, seemed to think they weren't available. Be handy to know if they are.

 

[Andy™]

quick google shows merlin gerin have add-on TP RCBO's, but they are sideways (so you need 6 ways)

couldnt find any proper TP RCBO's

 

[Lurch]

[quote name='Andy

 

[Andy™]

I would imagine though that an enclosure and RCD on the side would be a fair bit cheaper than the MG add ons.

i would expect that too

 

[steptoe]

why do we need RCD protection I would like to ask

 

[Elekk]

We need RCD protection because water heater is a wet load.

 

[daveygh]

had the same thing with a 3 phase ac unit - we used a tp mcb with an rcd in an enclosure next to the board , it was an Memshield 3 board and was told they dont do a triple pole rcbo

 

[septiclecky]

had the same thing with a 3 phase ac unit - we used a tp mcb with an rcd in an enclosure next to the board , it was an Memshield 3 board and was told they dont do a triple pole rcbo

If the MEM3 is like the MEM2 you can fit a seperate pod onto the MCB to convert it into a RCBO.

 

[steptoe]

We need RCD protection because water heater is a wet load.

but where/who is stating RCD protection?

Im assuming this is commercial or industrial, so unless someone somewhere is specifying RCD protection then it wouldnt normally be required.

 

[daveygh]

If the MEM3 is like the MEM2 you can fit a seperate pod onto the MCB to convert it into a RCBO.

they have changed the mem3 - you cant convert the mcb's now, but i think the pods for mem2 are only good for single poles