Generator Capacity

At the common switchboard, seperate the fan points & the lighting points. Then using a small Pla Relay or a mini contactor & using some N.O. or N.C. logic, it can be easily implemented such that during DG supply only lights would be ON and during mains supply both fans & lights would be ON.

But he says there is only one cable coming from Generator to hostel block. If So, I think we should know how the change over happens and where it happens. The n you can do something as mentioned above by using relays...... For me.. without relays too. by using a small extra wiring.

Dear friend,

Why don't put sub-panel beside the existing panel and just connect the power from the line side of the existing panel? I think that is the most simple and economical way, which you don't requires rewiring. However I assume that the installer is qualified electrician and all safety consideration including wire sizes are taking into accounts. Although I anticipated that you will do personal supervision being BE Electrical and Electronic Engineer with 20 years experience in Power distribution field. as I found in your Biography, so I did not send you the simple one line diagram.

Kind regards

Roman

Assuming that the selector switch / contactors are remote from the board then you could pass a radio signal to operate the necessary contactors or look for one of the suppliers of remote signalling over the existing wires.

You could even do it by GSM. There are a lot of suppliers who can send an signals over the GSM network to operate home automation.

Regards

Chas

Hi,

This may interest you

www.sigtec.eu

regards Chas