A work around for low voltage.
Hi All, Due to the campground refusing to reserve a 50 amp site for me (three months in advance), I've been put where there is only a 30 amp outlet and the campground wiring is, shall we say, "chal...
Forum Discussion
GordonThree wrote:2oldman wrote:GordonThree wrote:Not sure I understand your question. The purpose of an AF is to boost sagging voltage, which by definition decreases amps.
If the wiring at the CG is so bad that voltage is severely sagging, how is an autotransformer going to help? As a step-up transformer, it will be trading amps for volts,...
Increased voltage reduces amps only on the output side, the transformer's secondary ... but there is no free lunch, that boost in voltage comes from increased current draw on the input side, the primary.
Say an AC needs 1800 watts to operate. At 125 volts that is 14.4 amps. To deliver 1800 watts, the primary winding, operating at 100 volts, needs to draw 18 amps, plus whatever losses there are in the transformer itself.
Not sure on this but at very low voltage, I suspect the wattage required will increase as the motors turn less efficiently.
So an 1800watt motor may be pulling 1900watts due to low voltage. By giving it full voltage, it needs less watts.
Can any one confirm this?
