Prev: 10 points to you..
Next: Backplanes and daughter boards. Connecting the same signal lines to a large number of boards/chips
From: Very Sick Edmond Wollmann on 11 Aug 2010 21:23

"Jon" <jon8338(a)peoplepc.com> wrote in message
news:4YqdnV_GCaqgWcPRnZ2dnUVZ_gudnZ2d(a)earthlink.com...
> The electrical service goes to the house. There are 3 underground 000
> cables that go to the barn from the house. The barn has a 60 amp breaker
> in the breaker box at the house. The 12,000 watt generator is in the
> barn. It has a 50 amp 240vac outlet, a 30 amp 240vac outlet and several
> others. I am hooking the 50 amp outlet to the house. I am using the same
> 3 underground 000 cables to send generator power to the house during a
> power outage.
>
> A 90 amp contactor in the barn won't connect the generator to the house
> unless:
> 1. The electrical service to the house is off, and
> 2. The service disconnect switch at the house is off.
>
> When the generator is turned on, it tests the service disconnect at the
> house to assure the above two conditions are met. This is done by sending
> a 1 second electrical pulse to the house to see if it will actuate a coil.
> If the coil actuates, the 90 amp contactor latches open and prevents
> backfeed into the grid. If the service power turns on during that 1
> second, the generator power and service power will clash and throw a 50
> amp breaker to the generator.
>
> http://jons-math.bravehost.com/transfer.html
>
>
>



 | 
Pages: 1
Prev: 10 points to you..
Next: Backplanes and daughter boards. Connecting the same signal lines to a large number of boards/chips