Forum Discussion
professor95
Mar 31, 2011Explorer
bill43mx wrote:professor95 wrote:
If over voltage is a concern, spend the $39.95 for a KILLAVOLT and use the surge protectors as a second line of defense.
So the Killavolt monitors the voltage the genny is producing and if it senses an overvoltage condition it shuts the genny off. But I think I remember reading in this thread oh, about a couple of hundred pages ago:D , that you shouldn't shut the genny down with a load on it because that causes an overvoltage (iirc because of the field collapsing?) that could damage equipment hooked up to the genny. Am I remembering this wrong, or do we have a catch 22 here since the Killawatt doesn't shed the load but rather just shuts the genny down?
Which risk is greater? It is a lot like the decision to slam on you brakes to avoid hitting a Semi knowing you will spill your coffee, or ignoring the semi inches from your front bumper in hopes of not spilling your coffee.
Actually, the voltage drops so fast when you turn off a generator with a load attached that there is little chance of doing harm to an appliance in the RV. Any voltage rise due to the generator field collapsing is so short that it should be clipped with the surge protectors I HOPE you are using. Same effect as losing power in a storm - lights dim before they go dark as transformer fields collapse and provide that last few cycles of power. The greatest risk, as the Wiz pointed out, is to the AVR as it ups the current to the field coil in an attempt to maintain output voltage.
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