Suitable RCBO for EESS install

[Danny H]

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I mistyped 'I can see' meant to type Can't.

 

[DPG]

I mistyped 'I can see' meant to type Can't.

We've had worse don't worry.

 

[mainline]

I work for a renewable energy company that install PV systems and battery storage and one of the lads mentioned that the tutor on the PV and battery course said that RCBOs are not suitable as they are not Bi directional. Since then i've been trying to get confirmation or any info from manufacturers on this and getting no joy, as a rule we install a new DB but on some retro fits an RCBO would be ideal as installing a separate board would cause to much disruption. Very Frustrating.

16 A 1 Mod DP Compact RCBO 6kA B Curve 30mA Type A - M2 Electrical

Available in 6 A to 40 A 30mA, Type A tripping sensitivity800 mm long Neutral CableSwitched Neutral as standardReduces time for insulation resistance testingBi-directional

m2electrical.co.uk

 

[pc1966]

@mainline has pointed to the M2 RCBO that explicitly say they are bidirectional, I also know the Wylex/Crebtree compact RCBO will be OK as they are also neutral-switching and fully isolated on the output when tripped - they allow you to IR test on the load side without any issue.

Sadly so many companies now have as "data sheet" that has damn-all information of any technical nature.

 

[Danny H]

Thanks mate, I neglected to say we only used DP RCBOs,or SP an N but some manufacturers dont specifically state its Bidirectional. like you say though mate some companies are better than others,

 

[GalaxyTS]

Hi all....just catching up on the subject of bi-directional devices, having recently undertaken the EESS course. I usually fit Elucian boards but don't have an answer on whether their RCBOs are bi-directional at the moment, however I have just downloaded a Proteus datasheet which clearly states that their Type A devices ARE bi-directional

 

[GalaxyTS]

Hi all....just catching up on the subject of bi-directional devices, having recently undertaken the EESS course. I usually fit Elucian boards but don't have an answer on whether their RCBOs are bi-directional at the moment, however I have just downloaded a Proteus datasheet which clearly states that their Type A devices ARE bi-directional

Update....have also just had confirmation from WCED that their full range of RCBO, RCD and MCB are bi-directional and suited to solar/EESS installs

 

[pc1966]

Relating to this discussion I saw this today:

BEAMA Technical Bulletin - Connection of Unidirectional and Bidirectional Protective Devices

www.beama.org.uk

Basically it says if they are marked line/load or have direction arrows they are not suitable, which seems to rule out the Wylex compact RCBO as they have direction arrows on them.

 

[nigeyboyH74]

I'm the QS and my manager doesn't have a sparking back ground, I've stopped using them for the time being until I can get definite answers, we only ever used 2 pole RCBOs but most don't state if they are Bidirectional and like I say very little info out there. I can see a reason why myself. Hopefully will get some Statements/replys of manufacturers soon. Would appreciate any info anyone comes across, and I'll keep the thread updated if/when I find out.

Hi Danny, only just seen this post, but Hager now do a single mod bi-directional rcbo up to 32amp, and a double mod to 40 which will fit straight in a domestic board, some info ADC932R | Hager UK - https://hager.com/uk/products/h/adc932r-rcbo-1m-1pn-6ka-c-32a-30ma-a

ADA940U | Hager UK

Find Hager products, RCBO 1P+N 6kA B-40A 30mA A Class and more on Hager United Kingdom

hager.com