code advocate [RE-wrenches]

Kurt Albershardt info at es-ee.com
Mon Nov 6 08:41:33 PST 2006


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Of course -- but with DC you can (using semiconductors) easily control whether current flows in one direction or the other.  See Texas power grid and its "interconnection" with the rest of the country.  This would allow you to fairly easily create a situation (e.g. using high power Schottky diodes or MOSFET's) where the flows in each direction were protected by separate breakers.

It should even be feasible to build an asymmetric magnetic breaker (two sets of coils and opposite polarity diodes in the coil circuits, thus creating the same effect but not relying on the upstream electronics and more likely to be code approvable.)







--On Monday, November 06, 2006 3:55 PM +0000 Brian Crise <bcrise at nietc.org> wrote:

>
> The type of current flow, (AC or DC) has nothing to do with the
> direction of current flow.  You control direction by how much you are
> producing and how much you are consuming.  Supply and demand.
>
> Kurt Albershardt wrote:
>>
>> Ah, right--and since it's AC there's no way to control direction.
>>
>>
>>
>>
>> --On Friday, November 03, 2006 10:50 AM -0800 "Todd Cory, Mt. Shasta
>> Energy Services" <toddcory at finestplanet.com> wrote:
>>
>> >
>> > Nope, because current flows through this breaker in two directions.
>> >
>> > When RE sources are less than the loads, the breaker supplies up to 50
>> > amps of load to a panel to power circuits that will have back up power
>> > during grid outages.
>> >
>> > When RE sources exceed the loads, backfeeding can supply up to 30 amps
>> > to the bus.
>> >
>> > Todd
>> >
>> >
>> > Kurt Albershardt wrote:
>> >
>> >>
>> >> Couldn't this be solved with the availability of a 100% rated 30A
>> >> breaker?








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