TRANSFER BREAKER ????????

[TRUE POWER]

Hello Friends,
Can you help me here with this generator/ transfer situation.

What we have is an existing electrical installation where there is a meter bank with a main 1,000 Amps breaker.

The service is 120/208V, 3 - phase. The meter bank currently serves six meters rated at 100 Amps 3 phase, there is also a 400 Amps service tapped off from the 1,000 Amps supply in the meter bank. this 400 Amps is split up to serve two 200 Amps panel after it leaves a set of C.T.

The owner wants to have a gas generator installed on the roof of the building to serve the units that this meter bank takes care of.
We don't want the power company (CUC) KWHM to be reading power consumption when the generator is running. We don't have any room in the electrical for any large equipment's.

I was told that there are breakers that could be fitted in the electrical panels for these units that would work as a automatic transfer switch which could work in conjunction with a generator panel that is link with the generator.



All the panels and meter bank is G.E.

If we have to replace the existing panels with panels that are fitted with these breakers then the owner would even consider this option.

Thanks for your assistance as usual Guys.

TRUEPOWER

 

[kwired]

Looking at your location, one must first ask if NEC applies, or what codes do apply?

For NEC installs, I don't know that I have ever seen anything that will fit in place of existing breakers, and if there were such a thing, not sure what it would cost compared to other options.

You about need individual transfer switch (manual or automatic) for each occupant on load side of their metering, as well as possible distribution equipment for the standby supply conductors if you can't locate these switches where you can easily comply with feeder tap rules, or other overcurrent protection rules. You also have potential for problems with grounded and grounding conductors and undesired current paths and need to carefully watch how those are installed.

 

[ceb58]

The first thing is did/has the owner consulted with a structural engineer to see if the generator can be placed on the roof and is it allowed by the local code.