Three phase RCD tripping

[Davido]

Hi Folks,

I have a question about a property in Spain and its power supply

I think I have messed up with my electrical company and asked them to supply me with a lower potential than I require. The house did have a 12,000 KW supply, I asked for a night rate and in order to get this I had to opt for a different power connection either 10,000W or 6500W. I assumed that the 6500W would be per phase I am thinking now it is 6500W in total.

The day they changed the meter the oven started tripping the RCD, the hob also trips it.

Is it usual for an RCD to trip but not latch down just to trip the power? It can be reset by toggling the switch.

Would not having enough power in the one of the phases cause the RCD to trip?

The bumer is if I have to ask to get the higher 10,000W rate I will have to have the house certified again. Is there any way that all three phases can be used together to give me more power?

Thanks in advance

 

[Farmelectrics]

^^^^^^^^^^^^^ agree still waiting for a reason they cant give you a single phase supply

 

[bertt]

So, Who ..got the solution?

:gunsmilie:Man Fights Goose, With Lightsaber - YouTube

 

[RogertheBodger]

The size of the cable supplying a property could be the limiting factor, three phase into domestic properties is common and may well be supplied by 4 x 6mm cable, which would make a single phase supply a bit iffy, the cable could be upgraded but it may be more trouble than it's worth depending on length/difficulty etc.

Edit. OP's probably still in the queue at the electric company office, they're hard work to deal with.

 

[WilcoxElec]

So what are the supply values/bands in France, that you get to choose from, for typical domestic installations??

[TABLE="width: 333"]
[TR]
[TD="width: 149"] Puissance souscrite.
(kVA)
[/TD]
[TD="width: 166"] Réglage Disjoncteur
(A).
[/TD]
[/TR]
[TR]
[TD="width: 149"] 3
[/TD]
[TD="width: 166"] 15
[/TD]
[/TR]
[TR]
[TD="width: 149"] 6
[/TD]
[TD="width: 166"] 30
[/TD]
[/TR]
[TR]
[TD="width: 149"] 9
[/TD]
[TD="width: 166"] 45
[/TD]
[/TR]
[TR]
[TD="width: 149"] 12
[/TD]
[TD="width: 166"] 60
[/TD]
[/TR]
[TR]
[TD="width: 149"] 15
[/TD]
[TD="width: 166"] 75
[/TD]
[/TR]
[TR]
[TD="width: 149"] 18
[/TD]
[TD="width: 166"] 90
[/TD]
[/TR]
[TR]
[TD="width: 149"] 24
[/TD]
[TD="width: 166"] 40
[/TD]
[/TR]
[TR]
[TD="width: 149"] 30
[/TD]
[TD="width: 166"] 50
[/TD]
[/TR]
[TR]
[TD="width: 149"] 36
[/TD]
[TD="width: 166"] 60

[/TD]
[/TR]
[/TABLE]


But this is not the whole story. Lower settings with 3 Phase unlikely - obviously :smile5: .

 

[WilcoxElec]

Often in this case the 4 wires are used as two pairs for monophase giving a total x-section of 12 mm2 - which would be counted as 10mm2 - at least temporarily

 

[WilcoxElec]

Three phase common in the countryside here in France - for agricultural use - pumps and so on. People often buy an old farmhouse and find they have 3 Phases - and usually the first thing they do is get it changed to mono - unless they are farmers and want to run motors and stuff ....... The disjoncteur de branchment is effectively an RCBO type "S" - which means it can be set to different sensibilities - but is sealed by the electricity supplier and can be set by an electrician contracted to do so by the supplier - but otherwise it is a criminal offence to break the seal -- I expect it is the same in Spain - from what I can make out here. A 12kVA three phase supply would probably be OK on three phase - 20 Amps per phase - provided the cookers and hotplates were appropriate and could be wired to more than one phase - which is often the case - (especially with induction). I always encourage customers with 3 phase to change to monophase unless there really is an electromechanical thing that is best with 3 phase ....... like a big irrigation pump !