SW4024 switching issue [RE-wrenches]

[Kirk Herander, VT Solar]

Kurt N. & Bob-O,

More info: The generator is start / stopped through the Trace auto gen start
circuitry.
Kurt: Are you saying that the Trace automatically switches back to inverter
mode before sending the stop signal? What is the length of this delay?

I instructed the customer to simulate a clean break of generator ac by
flipping the generator disconnect breaker off. This method powers his
electronics off as well. So I don't have much faith in my original idea of an
external relay to cleanly disconnect the gen. AC.

Kirk

sunwise at cheqnet.net wrote:

> Kirk Herander, VT Solar wrote:
> >
> > Hello,
> >
> The switching time of the internal relay between generator and
> battery/inverter AC is now long enough to power down these components
> momentarily.
> >
> Greetings Kirk,
> Is the Generator started by the Trace's Generator Start option?  If so,
> and you use the Auto mode to at least shut down the generator, it should
> transfer loads back to the inverter long before it even signals the
> generator to shut off.  This is the best way to shut down the generator,
> as it cleanly transfers and then lets the genset cool down a bit prior
> to shutting it off.
>
> Here's a related question someone else may have the answer to.... If you
> control the generator from the Trace, but use the manual ON and OFF on
> the Generator Menue (rather than AUTO) does it still drop out the
> internal transfer relay instantly, or does it use the falling voltage
> from AC2 to the relay coil and transfer back to the inverter??
>
> > Would disconnecting the generator AC cleanly, via an external contactor
> > / relay, before it was signaled to turn off help?
>
> If there is a problem with the transfer relay contacts or something, an
> external transfer switch may or may not fix it.  Might be best to figure
> out what is really going on first.  Something's different, what the heck
> is it?   Kurt Nelson
>
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 michael.welch at homepower.com

____________________________________________________________
T O P I C A  -- Learn More. Surf Less. 
Newsletters, Tips and Discussions on Topics You Choose.
http://www.topica.com/partner/tag01