That "magic device" is called Metal Oxide Varistor. As I already said, MOVs dissipates spikes and surges in itself, lowering it's internal resistance, and that is proven fact.
Now learn basic electricity. If its resistance decreases, then less energy is absorbed - not more. The equation from high school physics is:
W = I^2 * R
Decrease the current (I) or decrease the resistance (R) means a decrease in watts (and energy. How does a MOV that "lowers it's internal resistance" dissipate more energy? It doesn't. But when knowledge comes from retail myths, then basic science gets forgotten. Which do you believe? Lies to promote profit centers? Or basic science even taught in high school?
Please learn how easily scammers have promoted junk science. Difficult is for most people to admit the first thing they believed was an intentional lie. Why does that equation contradict what they told you? View the manufacturer spec number. Why do you ignore this? Where is the spec number that lists protection from each type of surge? Does not exist because it does near zero surge protection. But I am only repeating again why you intentionally ignore. No spec number. Explain that?
Lightning is the typical surge. Few surges overwhelm protection already insde every appliance. Lightning is one. But lightning is not the highest energy. Utility generated surges may be even higher energy. And even less frequent.
For example, a 33,000 volt wire fell on local distribution. Therefore hundreds of electric meters were blown 30 feet from their pans - in pieces. So many people who had plug-in protectors had damage even to the protectors. Unacceptable. At least one had failed circuit breakers.
But my friend knows someone who actually knows this stuff (including that above equation). Therefore he had no plug-in protectors, one properly earthed 'whole house' protector, and no damage (except to his meter). Even the protector was undamaged.
If that UPS offered protection (and it did not for so many of my friend's neighbors), then you can post manufacture numeric specs that say so. But you cannot - which explains why you ignore the challenge. For reason after reasons posted previously. And becaue the manufacturer does not even claim that protection. Please learn how easily you have been conned by myths. It even violates high school physics equations.
A UPS connects an appliance directly to AC mains when not in battery backup mode. That is when the destructive surge seeks earth ground, destructively, through a UPS via the appliance. Why does your UPS not claim any protection in its numeric specs? Again, you cannot avoid that damning reality. So stop listening to hearsay myths about an MOV doing the protection. It doesn't. Even though it is a best protector device available, it does not do any protection. But again, I will keep repeating it until you grasp it. There is a reason why I designed this stuff; and you did not.
Or learn from the NIST (US government research agency) who does this stuff and who is not selling profit centers:
> A very important point to keep in mind is that your surge protector will work
> by diverting the surges to ground. The best surge protection in the world can
> be useless if grounding is not done properly.
How does that MOV without an 'always required' short (low impedance) connection to earth provide protection? It does not. Did you see the word "useless"? Take a $3 power strip. Add those ten cent protector parts. And sell it to those who can be told how to think for $25 or $150. It is not a surge protector. It is a profit center.
How to identify each ineffective protector? 1) It has no dedicated wire for the always short connection to single point earth ground. 2) Its manufacturer will not even discuss earthing. It is that easy. Or, where does your UPS discuss what is always required for protection? It doesn't. At what point is the evidence damning? Near zero joules means no effective protection. And means retail advertising can claim 100% protection.
That should be more than enough to convince you. But I am not done.
Please. Good chance I was doing this stuff professionally before you ever touched a computer. To know about surge protection means learning about wire impedance. Current source. How does low voltage electricity flow through a tube of low pressure, inert, and non-conductive gas? Most is taught in a first year engineering course. Without basic electrical equations from high school physics, then scammers view you as a mark.
MOVs are some of the best protectors available (when capacitance is not problematic). But no protector does protection. Not even MOVs. That was posted before. If you did not understand that, then you did not yet grasp what a protector does. Or learn from another professionals such as Dr Schneider:
> As previously mentioned, the connection to earth ground can not be over
> emphasized. ...
> Conceptually, lightning protection devices are switches to ground. Once a
> threatening surge is detected, a lightning protection device grounds the
> incoming signal connection point of the equipment being protected. Thus,
> redirecting the threatening surge on a path-of-least resistance
> (impedance) to ground where it is absorbed.
> Any lightning protection device must be composed of two "subsystems," a
> switch which is essentially some type of switching circuitry and a good
> ground connection-to allow dissipation of the surge energy. The switch, of
> course, dominates the design and the cost. Yet, the need for a good
> ground connection can not be emphasized enough. Computer equipment
> has been damaged by lightning, not because of the absence of a
> protection device, but because inadequate attention was paid to
> grounding the device properly.
So who is lying? Those advertisers who spin what an MOV does? Of people who do this stuff professionally including the NIST, Dr Schneider, or well how about AT&T:
> Surge protection for DSL and dialup service.
> Surge protection takes on many forms, but always involves the following
> components: Grounding bonding and surge protectors. ...
> Grounding is required to provide the surge protector with a path to dump
> the excess energy to earth. A proper ground system is a mandatory
> requirement of surge protection. Without a proper ground, a surge protector
> has no way to disburse the excess energy and will fail to protect
> downstream equipment.
> Bonding is required to electrically connect together the various grounds of the
> services entering the premises. Without bonding, a surge may still enter a
> premise after firing over a surge protector, ... traveling into and through
> protected equipment, damaging that equipment in the process. ...
> Now, if all the various service entrance grounds are bonded together there
> are no additional paths to ground through the premise. ...
> By far, the whole house hardwired surge protectors provide the best
> protection. When a whole house primary surge protector is installed at the
> service entrance, it will provide a solid first line of defense against surges
> which enter from the power company's service entrance feed. These types
> of protectors can absorb/pass considerably more energy than any other type
> of protector, and if one does catastrophically fail, it will not typically be
> in a living space. ...
> Plug in strip protectors are, at best, a compromise. At worst, they may
> cause more damage than they prevent. While they may do an acceptable
> job of handling hot to neutral surges, they do a poor job of handling any
> surge that must be passed to ground. ...
> Then, to add insult to injury, some strip protectors add Telco and/or LAN
> surge protection within the same device, trying to be an all-in-one sale.
> Remember bonding? When Telco or LAN protection is added to a strip
> protector, if the premise ground, which is not designed to handle surges,
> cannot handle all of the energy, guess where that excess energy seeks
> out the additional grounds? You got it! The Telco and LAN connections now
> becomes the path, with disastrous results to those devices. ...
Now, reread it. Things this new are not understood in the first reading. AT&T is also saying how protectors adjacent to appliances makes surge damage easier.
We who did this stuff even traced surge damage to a network of powered off computers BECAUSE plug-in protectors earthed that surge destructively through those computers. Again, once energy is inside, then nothing can avert that destructive hunt.
Either energy dissipates harmlessly outside the building. Or that energy is inside hunting for earth destructively via appliances. Plug-in protectors sometimes make damage easier.
Please grasp this. No protector does protection. Either a protector makes the always required, short (ie 'less than 10 foot') connection to single point ground. Or it is ineffective (what the NIST calls "useless").
This soundbyte says it all - a protector is only as effective as its earth ground. At what point does the word "useless" get your attention? But that mean you must reject advertising myths that you were posting. For many, that is difficult. Advertising is that manipulative.
After a little reading I agree on this. Ups provide lesser protection from surges than surge protector, because it has less powerful MOV inside.
Surge protector and UPS, and PSU are in parallel with each other and wall outlet. That means that every MOV is parallel too, thus doubling protection (joule ratings).
, they are to stop random surges from anything such as a faulty transformer... or a power line arcing. they are definetly not intended to stop lightning....
