Genset connection as per SANS 10142-1 Figure S.4

[mygoggie]

Yes, essentially you need a 4-pole changeover switch.

Please have a look at this product - http://www.eaton.eu/Europe/Electrica...pole/index.htm

I think it will work with a mechanical interlock and a 220VAC coil on each contactor. I have two questions pertaining to this setup.
1. The grid side contactor will be in the active state for many hours and days on end. Is there any problems with this that I must be aware of?
2. Although the genset has an AVR, I am concerned that there might be chatter on the supply that can damage the genset contactor's coil. How do I check for chatter and what can I install to smooth things out?

Thanks so far!

[mygoggie]

I also have an E/L question. Although SANS states that all circuits must be protected by an E/L all the electrical contractors I have spoken said that they never put the light circuits on the E/L. The reason being that if the E/L trips, the owner then has light to see at night. I do many home inspections a months and out of interest I always look at the DB where I can to see if the light's L+N go through the E/L. Yet to find one .....

Your comments on this please.

[mygoggie]

Bump .... I would appreciate answers on the last two posts.

[Dave A]

Although SANS states that all circuits must be protected by an E/L

Could you please quote the relevant section.
(A.F.A.I.K., SANS 10142-1 does not require all circuits to be protected by an E/L unit).

Please have a look at this product - http://www.eaton.eu/Europe/Electrica...pole/index.htm

I think it will work with a mechanical interlock and a 220VAC coil on each contactor. I have two questions pertaining to this setup.

We're using a different contactor at our office. However, I can report we have no problems with it. The mere fact it is intended for power switching should mean it's designed to hold in for long periods. And we've had no chatter problems either.

[mygoggie]

A.F.A.I.K., SANS 10142-1 does not require all circuits to be protected by an E/L unit.

Thanks Dave, I stand corrected. I have read through SANS 1-42-1 2011 again and you are quite correct.

I have ordered the contactors. Let's see how these work!