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Old 08-28-2014, 07:15 AM   #31
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I disagree, an MOV is the devise that clip the voltage, in this case it is any voltage above 130V. The devices that you are referring to are Electrical management systems which monitor for correct polarity, open ground, under voltage etc. Most of these conditions are already accounted for in the devices they supply ie. thermal protection on motors from under voltage, breakers for overcurrent but to protect the electronic devices you do require surge protection. The EMS devices also use MOV's to prevent overvoltage.
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Ron
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Old 08-28-2014, 07:28 AM   #32
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Ron, exactly what are you disagreeing with?

For this discussion is limited to RV surge protection and EMS.

MOV's do not clamp the voltage and hold it to 130V. They present a low impedance path for extremely short duration spikes (Nanoseconds). This effect will begin around 300V.

These MOV's will not protect you from a source voltage of 150V. Only an EMS that can cut the power will do that.
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Old 09-02-2014, 09:27 AM   #33
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Quote:
Originally Posted by tnchuck100 View Post
Ron, exactly what are you disagreeing with?

For this discussion is limited to RV surge protection and EMS.

MOV's do not clamp the voltage and hold it to 130V. They present a low impedance path for extremely short duration spikes (Nanoseconds). This effect will begin around 300V.

These MOV's will not protect you from a source voltage of 150V. Only an EMS that can cut the power will do that.
Thanks tnchuck,
I don't disagree on your explanation...the original question was "does the breaker panel provide surge protection"....the discussion offered that user only a total protection solution which included a very expensive EMS. I understand that this is without doubt the ultimate protection, but only a small percentage of the EMS is dedicated to surge protection. I have installed surge protection using MOV's for only penny's and it may be a solution for others, if they so choose. It is certainly not for those that have no electrical background or understanding. As I said before, most of the devices in a trailer have safe guards in the form of thermal protection that will shut them off should you have under-voltage conditions or any conditions that will cause excessive heat in the unit. The trailer also has protection from overcurrent via the breakers to protect the integrity of the wiring and to limit the current drawn by the device. Most people do not have EMS protection in there homes which can be exposed to the same issues....but most people do have surge protection on their electronic devices in their homes. This forum should be open to different ways and methodologies.

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Ron
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Old 09-03-2014, 09:37 AM   #34
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Think of a surge protector as health insurance. You hope you never need it, but woe unto you if you ever do but don't have it.
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Old 09-03-2014, 10:18 AM   #35
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Very informative thread! I, for one, appreciate the back & forth amongst us. It offers different perspectives and brings out volumes of information that we wouldn't otherwise have access to, thereby making us far more intelligent and informed consumers, not simply being left to the mercy of the sales staff! This is really great stuff at this forum and I've learned so much here and just want to say thanks to everyone here!

That being said, and on another note, if you're surge protection device detefcts a problem, low voltage, faulte ground, loose wire, etc., what do you do about it? I'm certainly not qualified to be messing around with power pedestals & wiring. I usually know just enough to be dangerous...usually to myself, lol!
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Old 09-04-2014, 04:36 AM   #36
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That being said, and on another note, if you're surge protection device detefcts a problem, low voltage, faulte ground, loose wire, etc., what do you do about it?
1. Report it to the campground manager. It IS their responsibility.
2. Consider it a boondocking experience.
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