Which EMS Surge Protector
Just got our RV back from the repair shop! We had a 5th wheel for 10 years then changed to a motorhome 5 years ago. We had our first electrical failure in October. The Surge, or whatever, fried our...
Forum Discussion
An autotransformer is a different beastie than an autoformer.
Mine has 3 levels of boost and one of buck. Thanks to Mex it is also equipped with surge which is far more effective than the mov's in the much more expensive units in this thread.
I' also point out that ANYONE who has a hybrid inverter/charger with load support has a unit with an autotransforer.
As for the "ruling" it has no force in law.
As for campgrounds--they do not understand that using an autoformer doesn't 'steal' power from other campers. If I connect to a 30 amp outlet the autoformer does not allow me to use more than 30 amps.
For example an air conditioner.
Mine, on a hot day, draws 1900 watts. Let's say I'm running the fridge too, which is another 325 watts.
That totals 2225 watts.
2225/120 = 18.5 amps.
Lets say the park, through no fault of their own is only able to feed 90 volts.
2225/90 =~ 24.7 amps
So I am still 5.3 amps below the 30 amps that I have purchased.
Ah but--the autoformer is not 100% efficient. It does approach 99%--but I'll use 98%.
24.7/ .98 = 25.2 amps. So I'm still well below 30 amps.
The absolute lowest voltage I've seen is 100.
In actual use, I choose to limit my load to 24 amps. I use load support for any extra draws.
I also have solar which reduces my "foot print" to the campground by about 1000 watt-hours per day.
Mine has 3 levels of boost and one of buck. Thanks to Mex it is also equipped with surge which is far more effective than the mov's in the much more expensive units in this thread.
I' also point out that ANYONE who has a hybrid inverter/charger with load support has a unit with an autotransforer.
As for the "ruling" it has no force in law.
As for campgrounds--they do not understand that using an autoformer doesn't 'steal' power from other campers. If I connect to a 30 amp outlet the autoformer does not allow me to use more than 30 amps.
For example an air conditioner.
Mine, on a hot day, draws 1900 watts. Let's say I'm running the fridge too, which is another 325 watts.
That totals 2225 watts.
2225/120 = 18.5 amps.
Lets say the park, through no fault of their own is only able to feed 90 volts.
2225/90 =~ 24.7 amps
So I am still 5.3 amps below the 30 amps that I have purchased.
Ah but--the autoformer is not 100% efficient. It does approach 99%--but I'll use 98%.
24.7/ .98 = 25.2 amps. So I'm still well below 30 amps.
The absolute lowest voltage I've seen is 100.
In actual use, I choose to limit my load to 24 amps. I use load support for any extra draws.
I also have solar which reduces my "foot print" to the campground by about 1000 watt-hours per day.
