Uninterruptible
Power
Supply

Battery backup ac power systems with
built-in AVR, wide input voltage windows,
as well as surge protection and filtering
 

TSi Power Corporation uninterruptible power supply (UPS) products are available in rugged steel rack-mountable enclosures; compact with extreme wide temperature batteries; and outdoor IP44/NEMA 3R rated wall or pole-mountable enclosures. They are available with built-in microprocessor-controlled line-interactive automatic voltage regulation, over/under-voltage protection, surge protection with heavy-duty filtering, and wide input voltage windows for long battery life. Long battery backup times are available with extended battery packs.

Uninterruptible power supplies, also called uninterruptible power systems, are for where uptime is critical to an operation's mission fulfillment. Typical UPS backup times are usually less than 20 minutes. If longer times are desirable, choose an uninterruptible power supply with extra battery cabinet flexibility, and enough extra reserve battery cabinets to satisfy your requirements. 

Choosing the optimal size UPS

Please remember that your measured current draw is what will determine your backup time, not the nameplate ratings, which sometimes are double what the actual amperage (or Watts) is that your systems uses. (In other words, you're likely to be pleasantly surprised if you base your backup time estimation on your nameplate ratings, but perhaps not too happy if you find out you bought a UPS one or two sizes larger than you really needed). You are welcome to call for a recommendation for your application.

For calculating actual backup time, a good rule of thumb is that if your actual load is 3/4 of the UPS capacity, you usually can double your backup time, and if it is 1/2 loaded, you can usually triple your backup time.

Of note, redundant uninterruptible power supplies, and/or motor-generators or dc to ac inverters, are possible by adding an automatic transfer switch (ATS). Similar to the RAID concept of redundant arrays of inexpensive hard drives, ATS enables redundant arrays of inexpensive UPS. ATS are highly recommended for mission-critical systems. (Note for use of ATS: Both input power sources must be UPS or inverters that have pure sine wave output, even when running off of the batteries ~ below, that would be the sine wave XUPs or Premium Series, (or Outdoor XUPs on the Outdoor UPS page), and for inverters, the XINv Inverter Series). 

Typical uninterruptible power supply applications are: