Type B RCD (ie AC/DC sensing - NOT RCBOs!) stockists?

[davelx]

Does anyone know of a supplier that holds type B 30mA DP RCDs of any make, as required for EV charging points? I can't find any on TLC, YESSS or CEF web sites. For that matter, I can't find them listed on the common manufacturers' web sites either. (MK, Wylex, Eaton, Hager)

Thanks

 

[PrenticeBoyofDerry]

Type B?? You just want a double pole 30mA RCD without OCP.
https://www.rselectricalsupplies.co...-o6usCBz5HFVvfHdyJT1ihJAMtIUzDldDmhoC80jw_wcB


CEF, a few here http://www.cef.co.uk/catalogue/categories/rcd-s-2-pole-rcd-s
Then TLC https://www.tlc-direct.co.uk/Main_Index/Consumer_Units_Index/CP_Range_Command/index.html

Oh and Yesss https://www.yesss.co.uk/search/rcd

 

[333rocky333]

I always thought the 3 types were
Type A
Type AC
Type S

Edit,
http://www.doepke.co.uk/rcd/rcdB.html

"Type A RCCB / EN61008-1 Suitable for use with AC and pulsating DC with a maximum DC content of <6mA (Fig 1). If more than 6 mA DC flows through the RCCB, the tripping characteristic will be altered due to the saturation effect of the DC current on the A Type sensing coil. As the level of DC current increases the tripping time will increase to a point where the coil is completely saturated and the RCCB will not operate – see clause 133.1.3 IEE Wiring Regulations.

Type B RCCB / IEC60755 / IEC62423 Designed for use in installations subject to AC and DC residual currents, outside of the range of an A type RCCB."

https://www.tlc-direct.co.uk/Technical/DataSheets/Wylex/WylexSolarPV.pdf
Shows a wylex 40 amp

Have you tried EDMUNSON, I recall them selling PV stuff

 

[davelx]

There seems to be some confusion here (it may be mine). Type B are AC-DC sensitive so can trip in the presence of DC currents that would prevent other types operating. They should have the pulsed and continuous DC symbol in addition to the AC symbols. The DC symbols don't appear on the items you linked to.

See 722.531.2.101 of 18th ed BS7671 DPC,

also

http://www.doepke.co.uk/download/Techpub-17

 

[EFLImpudence]

I don't know much about EV charging points but -

are you perhaps wondering unnecessarily?

 

[EFLImpudence]

I think also, after the part I have highlighted, there should be a comma and then a lower case t.

Whatever it is supposed to mean, it is very poorly written. There's a surprise.

 

[securespark]

C'mon, it's a big, big document. And although there are lots and lots of people working on it, they do have other things to worry about, like when their next buffet is coming along or whether they can catch a sneaky peek at their secretary's new dress. And then there's the distractions of the internet...

They can't possibly be expected to get it perfect.

 

[securespark]

Sorry. I forgot to add the keywords stuffy, old and farts.

 

[RF Lighting]

I have just installed some AC/DC type B RCDs supplying inverter driven robots on a dairy farm.

The only supplier we could find was doepke but be warned you're looking at around £350 for double pole and £500 for 4 pole devices.

 

[333rocky333]

578 pound for a wylex
http://www.electrium.co.uk/products/wylex/catalog?main=ABJ&man=0150&sub=AAF&pro=AAB&level=4

 

[davelx]

Thanks, that pretty much means that for domestic charge points, the dc protection has to be built into the charger. Which for a Tesla means it has to be built into the car as they support charging from a standard 32A industrial outlet.

If that's how it is then there's no problem. I think I'll drop them a line to check.

 

[JohnW2]

I think also, after the part I have highlighted, there should be a comma and then a lower case t.

I don't think so - at least for me, that would make it even less understandable (as well as grammatically rather odd {incorrect?}).

Kind Regards, John

 

[EFLImpudence]

Well, it depends what it's supposed to say:
Either what I said or some other correction.

"Each charge point ... ,protective measures against DC fault current shall be taken, except where provided by the EV charging equipment."

doesn't make sense.

 

[JohnW2]

Well, it depends what it's supposed to say: Either what I said or some other correction. .... "Each charge point ... ,protective measures against DC fault current shall be taken, except where provided by the EV charging equipment." .... doesn't make sense.

It doesn't. I would imagine that it's meant to say something like:

"For Eeach charge point ... ,protective measures against DC fault current shall be taken, except where provided by the EV charging equipment."

... which, I would suggest, does make sense.

Kind Regards, John

 

[EFLImpudence]

That may be one way but then neither comma is required.
If the comma before 'except' is used then it implies their would be more after the clause.

As it is the point of the sentence it would be better if it started with 'Except where ...' or

a new sentence started at 'Except where' and then as I suggested.


As the first sentence mandates the use of at least an A type RCD, it is just very badly written.