RCD Trips

[steve58]

Two jobs both identical with panels and invertors ect. Ie: Aurora 3.6 TL , 14 panels 235w. Both using Wylex garage boards 16amp mcb and 63a 30ma RCD 4mm T&E. One starts up and works no problem the one next door trips RCD. Done all checks and test all ok. Invertor goes through start up all ok then after about 2 mins trips RCD. Any ideas please

 

[BruceB]

TL inverters can have some leakage.

Don't the Aurora instructions recommend a 300mA rcd if you have one?

 

[Glen Powell]

Wylex are IMO the worst for nucence (sp) tripping, try a different RCD of same design probably be OK lol :S

 

[rich.250]

Earth leakage clamp meter?? Have you ramp tested Rcd to check it is functioning correctly?

 

[steve58]

Yes done a ramp test and all ok but still changed RCD just to be sure

 

[rich.250]

Have you measured leakage? Just incase there is faulty equipment??

 

[mmccx]

any tl inverter will take out 30ma rds all day long. Either scrap the rcd all together of change to 100ma at least - obviously provided installation method of cable allows or its a tt system

 

[Glen Powell]

any tl inverter will take out 30ma rds all day long. Either scrap the rcd all together of change to 100ma at least - obviously provided installation method of cable allows or its a tt system

Really? I have not noticed this, what evidence do you have? I need to ensure our installers are not doing something wrong, saying that we have not had an influx of complaints about RCD trips either which I am sure we would of had with the amount of installs carried out

 

[mmccx]

The amount of ones I have had to change in recent months! Also all manfacturers I use recommend Atleast 100ma SMa solarmax eversolar fronius etc. 30ma rcd's will generally go randomly and from experience will happen mostly on duel tl inverter setups and the larger size inverters 3.5 kwvand up although it has happened on the smaller ones.

Also never put an inverter on a shared rcd's just in case you didn't know

 

[Glen Powell]

I would not expect you to and our company has installed 30ma Type B RCDs for over 7 years and out of all the installs only had to replace about two which were on tin roofs.

Is this not just masking a problem within the houshold or the design? Why would you have residual current on a class II product ??

As a quick question how many other installers increase the RCD size to combat tripping ?