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Old 08-20-2015, 12:19 PM   #51
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Good point, but would that harm the autoformer? Having the ems after the autoformer would still prevent power being allowed into the rv if those conditions were present.

Rich
Unless the autoformer is protected internally against 240V input, an open neutral will destroy it. IMHO, an open neutral is a worse situation by far compared to under/over voltage, etc. It basically, applies 240V to the entire coach. So I've been told anyhow.

Boowho??
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Old 08-20-2015, 03:39 PM   #52
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Just a source of info for both ems and autoformer
Electrical Tutorial - Chapter 13 - Surge Protection


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Old 08-23-2015, 10:20 AM   #53
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Surge Protector... booster... or both?

Progressive EMS-HW50C, this is what I have mounted in the cabinet under the inverter.


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Old 08-24-2015, 10:17 PM   #54
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gasman94:
I read the information you sent and I noticed that the autoformer should be first in line before the EMS. BooWoo has a point. The only way your going to find out if there's an open ground is to check circuitry with EMS first, then if everything is good, install the autoformer ahead of the EMS.
What do you think?
Roger
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Old 08-25-2015, 05:45 AM   #55
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gasman94:
I read the information you sent and I noticed that the autoformer should be first in line before the EMS. BooWoo has a point. The only way your going to find out if there's an open ground is to check circuitry with EMS first, then if everything is good, install the autoformer ahead of the EMS.
What do you think?
Roger

Roger, I don't really know the answer to this question. I'm thinking that even though the autoformer is first in line, if there is an open ground and the ems detects it, there will be no current flow since the ems will not allow it. Will that harm the autoformer? I don't know. That being said, this is only my thought and should be confirmed with Hughes.


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Old 08-25-2015, 06:34 AM   #56
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don't go cheap on this purchase. Get the Progressive EMS series. Mine has saved me from several different issues, and none of those have been a surge. Had I just bought a cheaper "surge only" protector, I would have replaced lots of components by now.
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Old 08-25-2015, 07:15 AM   #57
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I can second the don't go cheap. Just got through replacing microwave, converter my surge with a Progressive EMS. No neutral on post and burned up all. The surge let it through. About $1000.00 worth of stuff. Park insurance is paying back. Now have the 50 amp portable EMS.
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Old 08-25-2015, 07:53 AM   #58
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dave sue

what exactly does your post mean.???? converter my surge with a Progressive EMS... huh???
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Old 08-25-2015, 07:53 AM   #59
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I can second the don't go cheap. Just got through replacing microwave, converter my surge with a Progressive EMS. No neutral on post and burned up all. The surge let it through. About $1000.00 worth of stuff. Park insurance is paying back. Now have the 50 amp portable EMS.
Not sure I am comprehending this (forgive me, it is early). You replaced your microwave & converter? Now you are replacing your surge protection to a Progressive EMS?
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Old 08-25-2015, 08:15 AM   #60
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As I read DaveandSue, their microwave, converter and not-named surge protector burnt up. They will now be using an EMS protector and advise everyone to not go cheap.
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