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Old 12-10-2006, 02:43 PM   #1
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Plugged in at a TN State Park and the Voltage booster (Franks) refused to play along. The voltage was 265 volts leg-to-leg and 133V each side to neutral. Franks box didn't give me any kind of error code so I assume the high voltage kicked it out. In the experience of the RV'ers here, is the 133V too high for the RV systems? We stayed there for a couple of days and I kept an eye on the voltage fairly closely. Never saw it above 133 and it stayed around 124-128V most of the time.
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Old 12-10-2006, 02:43 PM   #2
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Plugged in at a TN State Park and the Voltage booster (Franks) refused to play along. The voltage was 265 volts leg-to-leg and 133V each side to neutral. Franks box didn't give me any kind of error code so I assume the high voltage kicked it out. In the experience of the RV'ers here, is the 133V too high for the RV systems? We stayed there for a couple of days and I kept an eye on the voltage fairly closely. Never saw it above 133 and it stayed around 124-128V most of the time.
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Old 12-10-2006, 05:19 PM   #3
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A good rule of thumb is plus or minmus 10%. That means 120 VAC should be within 108-132 volts while the 240 volt legs should be 216-264. It sounds like your voltage just ran over the cutoff limit for your surge protector.
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Old 12-10-2006, 05:43 PM   #4
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Ron,
My Progressive Industries EMS box has a high limit of 132VAC. My Hughs Autoformer does not boost over 116 VAC.
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Old 12-10-2006, 06:37 PM   #5
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My experience in Tenn State park was a reverse polarity. My Progressive EMS would not come on. When I looked, it told me about the reverse problem. I told the young lady at the desk about the problem and she just said okay. I move to another site. Would not leave home without the EMS. s/Toby
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Old 12-11-2006, 04:15 AM   #6
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My EMS (from Automated Engineering Corp) permits up to 135/270 VAC before cutting out, so you are right on the hairy edge. The manual claims that "typical" power ranges are 105/210 to 132/264.

Back in the days when I worked in the computer industry, our engineers claimed the design "spec" for acceptable AC voltage was 117 +/- 10%, which would yield a range of 105-129 VAC. Those were digital electronics guys, though - not much concerned with motors and such.

Whether anything will be damaged by high voltage depends on the design tolerances built into individual devices. I would bet that the a/c compressor would be real happy at high voltage but relays and switches might not - they would have a greater tendency to arc when opening/closing. Transformers and power supplies - who knows? Small power supplies (like cell phone chargers, printer "bricks", etc.) might or might not suffer. Listen for anything that buzzes and feel for things getting warm and disconnect anything you are unsure of.
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Old 12-11-2006, 04:24 AM   #7
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Thanks for the input. I kinda figured there was a polarity problem or some such that the Franks picked up, but we had THE SITE that THE WIFE wanted, so come he11fire and brimstones, we were PARKED! :-)
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Old 12-11-2006, 07:48 AM   #8
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I use the Progressive Industries EMS system. It protects me from High / and or / Low voltage, including surges. Great investment.
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Old 12-11-2006, 12:51 PM   #9
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Well, I have earned my "Duuuhhhh" on at least part of this situation. The Franks unit recognized an open neutral and thus it would not allow the power hookup. Turns out the neutral had burned off the lug and was making intermittent contact with that connector. Still doesn't explain why the new Interstate battery is boiling off water so rapidly when using my normal 30-amp source though. Oh well, a SG check should give some indication of the battery health.

I'm looking forward to getting back behind the wheel and going somewhere. All this maintenance and repair stuff is cutting into my quality time with the Dynasty.
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Old 09-16-2008, 07:24 AM   #10
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Which of the Progressive Units is best the hard wired or the one you just plug in.
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Old 09-16-2008, 05:29 PM   #11
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They both do a fine job on power line monitoring and protection. The hard wired model can't be stolen off the power post and simplifies hook-up at the campground a tiny bit, but other than that there is no material difference.
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Old 09-17-2008, 04:35 AM   #12
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Two other advantages of the hard wired unit;

The inside digital display makes it easy to see what's going on, and with the hardwired unit, you can't forget to use it.
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Old 09-17-2008, 07:56 AM   #13
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Hi Ho: I like the hard-wired unit becauses it can be wired so that both shore power and generator power can be handled. I have had it kick out with the generator (due to overload) as much as with shore power.
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