solar metering faults

[Gavin A]

Hi thanks for that, M C S is currently chasing the installer company.Sorry the photos are the best I can do as I find it difficult to get down to the floor level to do anything,But thank you for the reply I now know that with the wonderful respounce I have had the fault in this system is not my imagination and now I wont be fobed off by the installation company

actually, it doesn't look like a fault in the installation to me from those photos.

 

[Worcester]

Nope, doesn't look like a fault in the installtion of the PV causing that problem, however as you say no overload protection on the connection as it looks as it goes to the tails on the main incoming switch. Not the best practice..

2.3.5 a.c. Cable Protection
Protection for the cable from the inverter(s) must be provided at the distribution board. This protective measure shall be specified and installed in accordance with the requirements of BS 7671. In very many cases the current limiting nature of the PV array and inverter(s) omits the requirements for overload protection and therefore the designer only need to consider fault current protection. The protection afforded at the origin of the circuit (the distribution board) in accordance with BS 7671, means there is no requirement for additional overcurrent protection to be installed at the inverter end of the a.c. installation.

So although no overcurrent protection exists, without an MCB it is relying on the main fuse to provide the fault protection (BS7671: 411.3.2.1) which I doubt it would meet (0.4sec), else we'd not need to put MCB's in at all

 

[Matt_M]

Is the cable run from the inverter to the fuse box very long? If it is; it could be an issue with Volt drop/incorrectly sized cable

 

[justoldmikey]

Thanks for that,I thought something along that line,i did think it may be some high resistance in the wiring.the MCS without checking has said nothing is wrong with the system.So in the summer(as I live in the north on Scotland)I will get an independent registered sparks out to look at the whole system.But once again thank you for your incite to this problem

 

[Noddy67]

where abouts are you in the UK. If you're very local to St Albans I wouldn't mind having a look - pictures are difficult to check.

 

[whinmoor]

where abouts are you in the UK. If you're very local to St Albans I wouldn't mind having a look - pictures are difficult to check.

I think he's in the Scottish Highlands!! mg_smile:

 

[justoldmikey]

Your a gentleman sir, thank you for that.Problem is I live on the north east coast of Scotland,but again thank you

 

[justoldmikey]

Thats correct not much sun ether at the moment,thank you