complaints when using a hughes autoformer
I am looking at a used hughes autoformer. I know some parks rules say they are not allowed. Some parks we have been in, I have seen voltage at @ 102 to 104 with my a/c on. I would be using a PI 3o...
Forum Discussion
SoundGuy wrote:
And you do realize all TRC Surge Guard EMS units have always used 102 vac as the low voltage disconnect threshold? :W Clearly those who designed these units are comfortable with this value, just as Progressive designers are obviously comfortable with having chosen 104 vac as their low voltage disconnect threshold. ;) Since I'm not a design engineer I am personally comfortable with those who are having made this decision for me. ;)
valhalla360 wrote:
Kind of scary as the standard design voltage is typically 120v +-10%, so below 108v starts getting sketchy.
Doesn't mean the air/con is going to burn out the first time you see 102v but it's certainly not good for it.
Normal supply voltage in N America is sped'c to be 120 vac +/- 5%, meaning one should find unloaded source voltage no lower than 114 vac, no higher than 126 vac. In reality of course that's often not the case and voltage often does exceed these specified limits, in which case setting low voltage threshold much higher would result in significantly more disconnects. EMS units with low / high voltage disconnects are considered the last defense against damaging source voltage, ergo the reason designers have chosen 102 vac and 104 vac as an acceptable compromise that can protect equipment without excessive disconnects. Those who disagree would be candidates for a voltage regulator designed to maintain incoming source voltage closer to specification ... I don't, and therefore am happy to protect my trailer with a Progressive EMS with a low voltage threshold of 104 vac. :B
