[TechAssist] Re: use a battery backup UPS for TV,DVD,surround amp system protection ?

  • From: "J Silverman" <greentron@xxxxxxx>
  • To: <techassist@xxxxxxxxxxxxx>
  • Date: Fri, 30 Apr 2004 12:53:58 -0400

The thing I would worry about the most is the waveform. A standard UPS will
have an output that approaches a square wave. A UPS with a sine wave output
is a much more sophisticated and expensive device. The peak voltage in the
power supply of the equipment being powered will be about 30% lower than
with the sine wave (for equal RMS voltage) so the equipment will draw more
current to compensate. This may not cause any problems but the equipment
should be tested under these circumstances to make sure.
Jerry Silverman
Greentron Inc
4 Newland Ave
Greenville SC 29609
864 232 3889
Fax 271 2080
mailto:greentron@xxxxxxx
----- Original Message -----
From: "Phil Bader" <tjanphyl@xxxxxxxxxxxxxxx>
To: <techassist@xxxxxxxxxxxxx>
Sent: Friday, April 30, 2004 10:06 AM
Subject: [TechAssist] use a battery backup UPS for TV,DVD,surround amp
system protection ?


> I never heard of anyone doing this, but I've had this thought for a few
> years:
> use a heavy battery back up UPS like used on PC systems for an
> entertainment center. Many ills are from power
> fluctuations,sags,surges,etc. TV EEPROMs corrupted, power supplies
> damaged, pro-jo CRTs damaged with  a spot because it went down at once
> without proper power down,etc.
> Most equipement is not a heavy current draw.
> Can this be done and should it?
> I have a Zenith 50" projection TV (not wide screen,standard 3:4) which
> is rated at 215 watts (2.8A) "max".
>  I think my VCR/DVD deck pulls maybe 30 watts.
> My Bose "lifestyle 7" surround amp, I don't know the wattage.
> And a cable box maybe another 30 watts?
> I'm guessing 300-400 watts max running everything
>  if using the sound system as well. Much less if using only the projo's
> speakers.
> Now most of these UPS units are in standby mode and  the connected gear
> is running off line current until there is a power loss, which time
> ultra-fast switching transferrs power to the battery system. This would
> be only needed for intermittant power fluctuations, or if lost totally,
> enough time to safely power off the audio/video system.
> A 6 outlet power strip plugged into the UPS would be convenient.
> What would be a good power rating for a UPS?
> Twice needed wattage? whats rule of thumb, and also whats your feedback
> on this idea?
> Phil Bader
>
> --
>
> Philip Bader
> Jan Phyl TV Inc. (estab. 1976)
> 3420 Recker Hwy. Winter Haven, Fl. 33880
> Fax (863) 299-8821
> email: tjanphyl@xxxxxxxxxxxxxxx
>
>
>
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