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Posted by Solar Flare on May 14, 2008, 10:38 am
Please log in for more thread options Agreed! As well as the installation costs.
>
> To be frank, I can't imagine the system that you are describing and I
> have been installing and maintaining generator sets at remote area
> construction sites (jungle of Irian Jaya, Sumatra, Mountains of Java,
> Viet Nam, etc., over the past forty years or more.
>
> In those cases it was usually two generators which could be switched
> on individually to provide camp power allowing the alternate unit to
> be maintained or serviced. When you wanted to switch units the
> electrician went out and started the second unit and manually flipped
> one switch open and the second one closed.
>
> From your description it sounds as though you have a generator that is
> substantially smaller then necessary to power your house/installation
> that you want to use in the event of commercial power failure and that
> you want some sort of automatic device to shed load when the auxiliary
> generator is switched on.
>
> Of course, it is your house and your generator but I would like to
> interject one comment. "The fewer automated devices you have to depend
> on during an emergency, or in a remote area, the few chances there are
> of something failing." Manually operated switches seldom fail,
> automatic stuff does, quite frequently. As an example, see the Trace
> Inverter thread in this group...
>
> (I top posted to continue the thread logically.)
>
> On Tue, 13 May 2008 08:54:08 -0400, "Solar Flare"
>
>>Those boxes are more special and usually only seen with a generator
>>suplied
>>kit.
>>
>>I am quite surprised at the low price. Maybe a nicer way to do it but each
>>circuit has to be transfered. Probably gives some nicer testing facilities
>>though. You could disturb only circuits that don't matter much to test
>>your
>>generator occasionally.
>>
>>The comment about whole house transferring was incorrect and probably not
>>desirable. Who needs the basement dehumidifier on secure power when you
>>generator/wind/solar/batteries may be limited?
>>
>>
>>
>>> Per Bruce in Bangkok:
>>>>Most installations that have more then one power source are simple:
>>>>
>>>>1. A Main entrance switch - possibly a requirement of your electrical
>>>>code.
>>>>
>>>>Essentially is a main switch to connect or disconnect the entire
>>>>"house" from the commercial electrical system. Mainly in case of a
>>>>fire or other catastrophe. Also acts as a isolation switch if work is
>>>>done on the electrical wiring between the "Entrance" and the load
>>>>center.
>>>>
>>>>2. A multi input switch, single output switch, rated at the maximum
>>>>total house current load. For example OFF - Commercial - Generator,
>>>>located after the Main Entrance (if required by local electrical
>>>>codes) or replacing the main entrance switch and before the main load
>>>>center. This switch MUST be the type that disconnects one circuit
>>>>before the next circuit connects..
>>>>
>>>>That is it.
>>>>
>>>>If the generator is not capable of powering the entire house then you
>>>>can restrict current requirements by (1) turning off certain
>>>>appliances, or (2) turning off certain breakers at the main load
>>>>center.
>>>>
>>>>That is all there is to it.
>>>
>>> That's pretty much what I had in mind - albeit in fewer words.
>>>
>>> But where do the multiple "circuits" come in with some transfer
>>> switches? For instance http://tinyurl.com/5sum2h is touted as
>>> having six "circuits".
>>> --
>>> PeteCresswell
>>
>
> Bruce-in-Bangkok
> (correct Address is bpaige125atgmaildotcom)
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