Bruce Carpenter wrote:
>
>
> Some things to think about.....
>
> The rated operating voltage of the MOV needs to be greater than the PEAK AC
> voltage, not the RMS.
The MOV I used is labeled GE N4 130L20
The spec sheet from Littlefuse/Harris/GE
says that the 130 is for RMS voltage.
>
> With respect to the generator surges.... Just from reading the post, my
> thought is that the only load on the generator was the power supply or maybe
> with an additional small resistive load. I suspect this was a switched
> power supply without power factor correction.
The Astron VS-50M I have is decades old and
definitely analog rather than switching.
Still, lots of inductive and little resistive
generator load.
The Onan generator was purchased in 1965 and
has a carburetor and mechanical governor.
The service entrance panel has an industrial
MOV on it to help with spikes.
The majority of receivers and transceivers
are now running on 13.6 Volts from a pair
of 6 volt golf cart batteries. Also we have
LED emergency lighting on the same batteries.
Now the generator only has to directly feed the
refrigerators, furnaces, sump pumps, and TVs.
The PCs are on UPSs.
>
> I hope this is helpful.
Yes, thanks for the information about degradation,
runaway protection, power factor, and peak voltage.
>
> 73
> Bruce, W3YVV
>
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