pianotuna wrote:
Hi Larry,
I find the autoformer useful because, even at 97 volts shore power supply I can run my roof air conditioner safely. The unit raises up the voltage. The unit I have does three layers of boost. One at 110 (10%), 2nd at 100 (20%), and third at 90 (30%) volts. It also bucks at 132.
I believe with 50 pedestals there are 9 on one breaker. If all the roof air and water heaters are on there will be voltage drop. Lots of it.
I'm not doubting that for a select few like yourself something like an autoformer might be a good choice. My comments here are that generally recommending one is NOT THE BEST OVERALL solution in general as a power protection option and certainly not as a substitute for something like the PI units that do MUCH MUCH more than just protect against low voltage and maybe surges. Thus something like the PI units IMO make much more sense for the VAST MAJORITY of folks.
Larry