Re: Remote Desktop

A typical computer grade UPS uses a relay to connect computer either
directly to AC mains or temporarily to battery backup. Does that relay
stop or eliminate harmonics, surges, or noise? Of course not. Then we
review that UPS's numerical specs. Even there, no such claims.

A UPS that would address all five problems (blackouts, brownouts,
surges, harmonics, and noise) is typically many tens of thousands of
dollars: a building wide system found in high reliability facilities
such as telephone switching stations and hospitals. Will that less
than $100 UPS solve harmonics, noise, and surge problems? It does not
even claim to in its numerical specifications.

Meanwhile, when does a computer grade UPS output dirtiest power?
When in battery backup mode. This one outputs a modified sine wave at
120 volts. What is it? Two 200 volt square waves with a spike of up
to 270 volts between those square waves. This is clean power? This
is a sine wave? Yes. Does this UPSt eliminate noise, harmonics and
surges? Of course not. Since computers have such robust power
supplies, then those 200 volt square waves and that 270 volt spike
(which is a modified sine wave) is not harmful to computer.

Widespread are technically naive myths that all UPSes do more than
just blackouts and brownout protection. Most UPSes are only for data
protection from short power loss. Myth promoters will hype that an
adjacent UPS does surge, noise, and harmonic protection. Noise and
harmonic solutions must already be inside a computer. They are called
computer grade UPes - selling for less than $100. A plug-in UPS is for
data protection from power loss. Other 'solutions' are located
elsewhere.

Leythos wrote:
In article <1148131537.126516.174340@xxxxxxxxxxxxxxxxxxxxxxxxxxxx>,
w_tom1@xxxxxxx says...
Five general type of power problems exist: blackouts, brownouts,
surges, harmonics, and noise. Which one(s) need to be solved?
Different devices address different problems.

So, how about telling us which of the above, in your list, a Quality UPS
solution, one that is on a 3 wire circuit, can provide any means of
protection against.

You left that out of your last reply.

We know that UPS's handle 1) Blackouts, 2) Brownouts, 3) Surges, 4)
Harmonics, and 5) Noise.

.

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