XPost: alt.engineering.electrical, sci.electronics.design
From: presence@MUNGEpanix.com
Martin Riddle wrote:
>
>
> wrote in message
> news:5469413c-d7e8-487c-843d-55cb7fa633f8@d17g2000yqb.googlegroups.com...
>> On Aug 8, 9:50 am, "Jon" wrote:
>>> 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
>>
>> Don't forget to add an alarm clock with a "95 decimal" fire alarm
>> bell.
>
> Jon's place,
>
>
>
> Cheers
ha!
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