snarlydwarf;566360 Wrote: > Case in point from today: > http://latimesblogs.latimes.com/lanow/2010/08/power-problems-damage-appliances-electronics-in-glendale.html > A severe enough outage that it damaged electrical meters. A friend knows someone who actually knows this stuff. A 33,000 volt electric line fell upon local distribution. Hundreds of electric meters were blown 20 and 30 feet from the pan. Shattered.
So many who had plug-in protectors had destroyed protectors and appliances. Obviously, a relay inside a UPS (that takes tens of milliseconds to respond) did nothing. Surge went right through that UPS damaging the UPS and electronics. At least one had a circuit breaker that would no longer reset. But my friend installed the only thing that does such protection. The solution that was installed even 100 years ago so that even direct lightning strikes cause no damage. He spend about $1 per protected appliance to earth one 'whole house' protector. He had no damage even to the protector. Only his electric meter was damaged. Read its numeric specs. No UPS claims protection in its numbers. Destructive surges are hundreds of thousands of joules - or higher. Numbers that cannot be obtained using observation. The UPS has only hundreds of joules. How does that hundreds of joules absorb or stop surges that are hundreds of thousands of joules? It does not. And it is not suppose to. It claims near zero protection on the box. Then those without education will proclaims, "That UPS does 100% surge protection!" The naïve are that easily deceived. When does near zero protection do 100% protection? Why did my friend have no damage? He installed the only thing that protects from that type of anomaly. He did not listen to people educated by retail myths. Instead he viewed numbers, knew an engineer, and had zero damage. A solution that costs tens or 100 times less money per protected appliance. Only myth purveyors and fools educated by observation would think a UPS does any real protection. Even the manufacturers numeric specs do not claim surge protection. And still so many only recite what the salesman told them to believe. -- westom ------------------------------------------------------------------------ westom's Profile: http://forums.slimdevices.com/member.php?userid=39650 View this thread: http://forums.slimdevices.com/showthread.php?t=80889
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