Author Topic: EV chargepoint industry suffering from lack of RCDs and DC detectors?  (Read 792 times)

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Online Faringdon

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Hi,
Is it true that chargepoint makers are suffering as they cant source  Proper Type A RCDs and the "DC 6mA" detectors.
...Due to the component shortage, also , because few  companies are allowed to make these devices, as they require serious  saftey approvals.
Also, because chargepoints are seeing huge sales volumes, and more new EVs are meaning offtheshelf RCDs and 6mADC's are getting sold out?
At the moment, only the extremely expensive brands are available fof the shelf....is this true?

Its certainly now very difficult to find a  cheap Type A RCD and a cheap "DC6mA" detector.
 

Online mikeselectricstuff

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Re: EV chargepoint industry suffering from lack of RCDs and DC detectors?
« Reply #1 on: September 24, 2022, 02:08:35 pm »
Seems to be plenty of different DP type A RCDs  in stock at Screwfix. these would typically be used by the installer, not the CP manufacturer. Recent wiring regs changes may have increased demand from type A RCDs and RCBOs as these are now needed pretty much everywhere with AC types depracated.

Not sure about current sensors, but they're just as likely to find MCUs and other parts out of stock.

I hear there's a problem with supply of switchgear in the US delaying machine installations etc.



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Mike's Electric Stuff: High voltage, vintage electronics etc.
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Online Faringdon

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Re: EV chargepoint industry suffering from lack of RCDs and DC detectors?
« Reply #2 on: September 24, 2022, 10:49:13 pm »
Thanks, i actually wonder how many EV chargepoints incorporate the "DC 6mA" detector within the chargepoint?....and how many rely on this detector being installed by the electrician as a separate module, so to speak.

It would be much quicker to install if the "DC 6mA" detector was part of the chargepoint...and much cheaper, since "DC 6mA" detectors are very expensive, and thats if you can source them at all.
 

Online mikeselectricstuff

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Re: EV chargepoint industry suffering from lack of RCDs and DC detectors?
« Reply #3 on: September 25, 2022, 08:35:30 am »
Most decent UK EVSEs do include DC protection, and also PEN fault protection.
(Recent legislation also requires any CP sold in the UK now to have a specified set of smart functionality).
This makes sense as the EVSE needs a contactor/relay to switch power to the car anyway, so only the detection is needed. 
The problem with doing it externally is that type B RCDs are quite expensive and not widely stocked. I don't think anyone makes a type B DP RCBO, so if installing in a typical UK consumer unit it's going to take up 3 slots.

Another issue is that there is that there is a common perception that UK wiring regs imply that you can only install breakers from the same manufacturer as the CU, though this makes no objective sense provideds the busbar height is correct.

There is also some scope for interpretation around the need for a DP RCD, as the EVSE will always have a DP contactor which will disconnect if power is lost, so the wiring regs requirement for DP RCD protection could be interpreted differently depending on exactly where you draw the line between the RCD and the car connector.

There are cheaper Type B RCD  options, like this, which I have tested and taken apart, & seems to be reasonable : https://www.aliexpress.com/item/1005003085547942.html?spm=a2g0o.order_list.0.0.5a0b1802lEFL1m


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Online Gyro

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Re: EV chargepoint industry suffering from lack of RCDs and DC detectors?
« Reply #4 on: September 25, 2022, 09:58:15 am »
Aren't you just rehashing the questions that you asked during your EV chargepoint exploits last year 'Faringdon'. Maybe you should re-visit your old threads, eg:

https://www.eevblog.com/forum/renewable-energy/current-sensing-in-an-ev-wall-box/
Best Regards, Chris

"Victor Meldrew, the Crimson Avenger!"
 
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Offline uer166

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Re: EV chargepoint industry suffering from lack of RCDs and DC detectors?
« Reply #5 on: September 26, 2022, 06:10:10 pm »
Is it true that chargepoint makers are suffering as they cant source  Proper Type A RCDs and the "DC 6mA" detectors.

Some (even better) makers make their own "DC 6mA" detectors, so no issues there. Type A is more tough, but no massive shortages that I know of.
 
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Online mikeselectricstuff

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Re: EV chargepoint industry suffering from lack of RCDs and DC detectors?
« Reply #6 on: September 26, 2022, 06:41:29 pm »
Oh and which idiot decided to use the same letters for RCD types and MCB trip characteristics anyway?
Gets very confusing when they get combined into an RCBO!

Youtube channel:Taking wierd stuff apart. Very apart.
Mike's Electric Stuff: High voltage, vintage electronics etc.
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Online themadhippy

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Re: EV chargepoint industry suffering from lack of RCDs and DC detectors?
« Reply #7 on: September 26, 2022, 07:48:15 pm »
Quote
t there is a common perception that UK wiring regs imply that you can only install breakers from the same manufacturer as the CU,

That'll be 536.4.203 Devices and components used in Consumer Units,Distribution Boards etc. must only be those that have been declared suitable for that purpose by the manufacturer of the assembly.

So in theory its permitted,however in practise can you see mk saying yea its fine to fit a crabtree breaker in our boards
 
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Online Monkeh

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Re: EV chargepoint industry suffering from lack of RCDs and DC detectors?
« Reply #8 on: September 26, 2022, 07:54:23 pm »
Quote
t there is a common perception that UK wiring regs imply that you can only install breakers from the same manufacturer as the CU,

That'll be 536.4.203 Devices and components used in Consumer Units,Distribution Boards etc. must only be those that have been declared suitable for that purpose by the manufacturer of the assembly.

So in theory its permitted,however in practise can you see mk saying yea its fine to fit a crabtree breaker in our boards

The manufacturer of the assembly is, however, the installer.

In reality it's arse covering and provides churn of installation components, to the benefit of the manufacturers and nobody else.
 
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