30 amp variac instead of an autoformer?
Hi, I've been looking for a 30 amp autoformer for some time. I wonder if this item would "fill the bill". 30 amp variac $169 Here is the company listing: variable ac transformer
Forum Discussion
Gdetrailer wrote:pianotuna wrote:
Hi GDE,
I had already eliminated that unit as it is not quite big enough to handle the surge from the air conditioner.
The A/C was tripping the campground breaker not the RV breaker.
An Autoformer, line conditioner with AVR will NOT HELP you at all.
There is no free lunch, an autoformer may "boost" the voltage on the output but in doing so it requires MORE CURRENT at the INPUT.
In many respects it will most likely end up tripping the campground breaker even faster.
The device you are seeking would essentially break every known laws of physics.. Those types of devices are known as "Over Unity" devices (IE making energy from nothing).. Many have tried and ALL have failed at making perpetual motion or energy devices.
Sorry, but that is the way it works.
Seems like it might still work. It is my understanding that an A/C will draw more current when input voltage is low so when it is fed with correct voltage the decrease in input current might be enough to offset the current draw into the AVR which of course will be higher than the A/C current since the AVR is boosting the line voltage.
Dick
