Quote:
Originally Posted by astral highway
I am about 5 metres above the main distribution board for the properties here - I've seen the giant busses when the door has been left open!!!  I am 1KM from the main substation. |
Are you able to identify the make, model and ratings of the CBs in the main board?
Is your aim to definitely use an in-rush limiting scheme - in which case your local upstream (or in equipment) CB can be sized to just manage operating rms level, and the trip characteristic to just meet the softened in-rush level expected.
It is also in your best interest to try and use a local CB from the same manufacturer as used in the main board CB, and to confirm co-ordination between your local CB and the main board CB via that manufacturer's technical data.