ct clamps too close together?

[Bobster]

The line and neutral will be connected together by the DNO in their cutout. It will not effect your RCD as it is before it in the installation.

Leave the rod alone.

 

[Wilko]

Rob means the neutral and earth, I'm sure .

 

[Bobster]

Rob means the neutral and earth, I'm sure .

I do indeed, just sat at the airport in Atlanta after flying for 11 hours. Brains a little shot, getting some funny looks ordering a beer at 5am.

 

[jouleflow]

Still tripping out at random, I noticed this morning that it had tripped out overnight sometime as it did yesterday night. After a few tries it eventually turned on and stayed on. Both meter red lights are on solid and we are generating around 1.5 kW with just a few fridges and lights on. Is this ok?

 

[UKMeterman]

Still tripping out at random, I noticed this morning that it had tripped out overnight sometime as it did yesterday night. After a few tries it eventually turned on and stayed on. Both meter red lights are on solid and we are generating around 1.5 kW with just a few fridges and lights on. Is this ok?

If it trips out overnight the local supply voltage may be too high, get the information from the logs or ask the DNO to do a 7 day trace.

 

[jouleflow]

Does anyone know the minimum distance the ct clamps should be from each other? Would being too close cause false readings or interfere with each other.

 

[jouleflow]

If it trips out overnight the local supply voltage may be too high, get the information from the logs or ask the DNO to do a 7 day trace.

The dno have fitted their monitor to do a 7 day trace. Hopefully this may shed some light on the issues. Will keep you posted.

 

[jouleflow]

The line and neutral will be connected together by the DNO in their cutout. It will not effect your RCD as it is before it in the installation.

Leave the rod alone.

Thanks Rod

could I in theory install loads of new earth rods without affecting anything? I don't propose to do so, but I am curious as I am told that rds's monitor the balance between neutral & earth. Could providing extra routes to earth disrupt this balance and cause the first incoming rcd to trip? This was the reason I questioned if I should only rely on the dno earth for stability.

 

[Wilko]

Hi - I'm guessing you mean RCD? They monitor the difference between the circuit current passing through them, typically the L and N. A difference current of 30mA (say) will cause the RCD to trip off line. That difference current is likely to be returning via E through a fault which may include us ...
That story you've been told sounds like a story to me .

 

[jouleflow]

Today we hope to get some info from the dno. Following their 7 day trace on our home they have completed another 7 day test on the nearest transformer. The information should be with us later, I hope it will be a fault with the supply as there is no pattern to the tripping. I also have an Electrician checking all our system to find earth leaks just in case.

Regarding the original post concerning the 3 ct setup on my Solis inverters. The only news I have is that they have rigged up the same setup at HQ in China & found their system became "unstable". I think they have a solution & eagerly await their conclusions.

Will keep you posted.

 

[jouleflow]

Dno have confirmed the transformer has seen better days and is due for replacement. They suggest that our phase should be changed in the meantime.
I have always wanted a 3 phase supply but at £23k it was too expensive, the price did include a new transformer though. Perhaps when they are renewing the transformer we can strike a better deal. I'm going to check if my 3 inverters will work on 3 phases.

The local Electrician removed our outbuilding supply from the main rcd and now goes through an mcb to the outbuilding cu. The outbuildings are now protected through their own rcd. This has virtually eliminated the trips, so perhaps too many circuits were through the main incoming rcd,

I haven't a definitive answer yet from Solis perhaps it is a bit more complicated that it seems.