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Pure Sine Wave UPS

APC UPS for Home and Office Forum

Schneider Electric support forum for our APC offers including Home Office UPS, Surge Protectors, UTS, software and services and associated products designed to share knowledge, installation, and configuration.

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Monchie_apc
Crewman
Crewman
0 Likes
4
75

Pure Sine Wave UPS

This was originally posted on APC forums on 4/26/2009


I understand my old reliable Back-UPS LS 700 is not pure sine wave or sinusoidal. I have 2 questions please;
1. will there be compatibility problem with newer computer power supply units (PSU) that are Active-PFC?
2. can I use my LS 700 to my home theater equipment, i.e. XBR LCD, DVD, DVDR, Blu-ray, Speaker/Subwoofer system?
Thanks.


Accepted Solutions
Erasmus_apc
Sisko
Sisko
0 Likes
0
75

Re: Pure Sine Wave UPS

This was originally posted on APC forums on 4/27/2009


In regards to old Back-UPS units (roughly before mid 2008) and PFC power supplies: yes, you will encounter issues with active-PFC devices/PSUs. Symptoms include: load drops and load "reboots".

Starting in mid 2008 all of our Back-UPS products being manufactured were revised to better handle load requirements for PFC devices, both through small firmware and hardware revisions. This allows the majority of Back-UPS being manufactured now to handle most (not all) PFC loads within their wattage range much better than older units. Their output is still stepped-approximated, however, and we still find the occasional PFC device that they have trouble with, especially those with high inrush currents or those that are just plainly "oversized" in relation to the UPS. If you feel that you would be better suited with a new unit, you can always follow our Trade-UPS program to get a new unit at a discount.

You should be able to use your LS700 with a DVD and DVDR, as well as the Blu-Ray player fine. I would leave the LCD tv and the Speaker/Subs (high inrush) on an AV-dedicated system, or newer/bigger UPS system.

See Answer In Context

4 Replies 4
Erasmus_apc
Sisko
Sisko
0 Likes
0
76

Re: Pure Sine Wave UPS

This was originally posted on APC forums on 4/27/2009


In regards to old Back-UPS units (roughly before mid 2008) and PFC power supplies: yes, you will encounter issues with active-PFC devices/PSUs. Symptoms include: load drops and load "reboots".

Starting in mid 2008 all of our Back-UPS products being manufactured were revised to better handle load requirements for PFC devices, both through small firmware and hardware revisions. This allows the majority of Back-UPS being manufactured now to handle most (not all) PFC loads within their wattage range much better than older units. Their output is still stepped-approximated, however, and we still find the occasional PFC device that they have trouble with, especially those with high inrush currents or those that are just plainly "oversized" in relation to the UPS. If you feel that you would be better suited with a new unit, you can always follow our Trade-UPS program to get a new unit at a discount.

You should be able to use your LS700 with a DVD and DVDR, as well as the Blu-Ray player fine. I would leave the LCD tv and the Speaker/Subs (high inrush) on an AV-dedicated system, or newer/bigger UPS system.

Monchie_apc
Crewman
Crewman
0 Likes
0
75

Re: Pure Sine Wave UPS

This was originally posted on APC forums on 4/28/2009


Thanks for the swift reply. Will it be ok if I just use the "always on surge suppressor" outlets of the LS700 for the LCD TV and speakers/sub?

Erasmus_apc
Sisko
Sisko
0 Likes
0
75

Re: Pure Sine Wave UPS

This was originally posted on APC forums on 4/28/2009


Yes this will be acceptable, as it will give you surge suppression to protect your TV and sub. Just keep in mind that the surge outlets will not do any voltage regulation or back-up of any kind, so other than the surge suppression you are looking at basic wall power.

Monchie_apc
Crewman
Crewman
0 Likes
0
75

Re: Pure Sine Wave UPS

This was originally posted on APC forums on 4/28/2009


I understand. Thank you again for your very enlightening replies.