MCB tripping

[Arcsys]

Hi,

Just done first PV install and hit a problem - can anyone assist?

PV system is connected back to a Hager Type C 16 amp MCB in a consumer unit.
2.5mm twin and earth connected from CU to main ac isolator.

Traced a problem existing between AC isolator and kWhr meter:

1. When kWhr meter is disconnected from AC isolator all is OK
2. Connecting the kWhr meter to the AC isolator but not to inverter (on the other side of Kwhr meter) causes the protecting RCD to trip!

Any ideas please?

Thanks

 

[Coleman]

Hi,


Just done first PV install and hit a problem - can anyone assist?

PV system is connected back to a Hager Type C 16 amp MCB in a consumer unit.
2.5mm twin and earth connected from CU to main ac isolator.

Traced a problem existing between AC isolator and kWhr meter:

1. When kWhr meter is disconnected from AC isolator all is OK
2. Connecting the kWhr meter to the AC isolator but not to inverter (on the other side of Kwhr meter) causes the protecting RCD to trip!

Any ideas please?

Thanks

Look very carefully at all the connections this may sound daft have you connected to the right neutral bar in the cu?

 

[telectrix]

think he's fixed it by now. thread was posted august 2010

 

[Coleman]

think he's fixed it by now. thread was posted august 2010

Yer I think you maybe right, didn't see the date

 

[telectrix]

don't worry. it's caught me out a couple of times.

 

[powervan]

lol must be a senior member by now