Top navigation bar for CareBase power quality website, homepage and product specification pages focused on mission-critical power systems protection, battery backup, precision voltage regulation and redundant on-line UPS using automatic transfer switches.

The latest news and product announcements. Power/surge protection, conditioning, control, battery backup and voltage regulation products. White Papers-Articles On Understanding and Achieving High Availability & High Quality Power Double Conversion True On-Line Battery Backup - Uninterruptible Power Systems & Single Conversion UPS Outdoor UPS for Extreme Temperature/Weather Environmental Conditions In Exterior Rated NEMA Enclosures AC Automatic Transfer Switches For Redundant Power Sources or UPS Bypass AC Power Conditioners - Low-Impedance Isolation Transformer and Ferroresonant Transformers Left navigation bar for the CareBase website focusing on mission-critical power systems and surge protection, utilizing UPS, precision automatic voltage regulators, line conditioners, battery backups, automatic transfer switches, on-line outdoor UPS, surge protective devices and more.



TSi Power
Automatic Transfer Switch

For Enabling Using 
Redundant Power Sources 
i.e. Two UPs Inputs, One Output

n automatic transfer switch enables redundant UPS, backup generators, DC to AC inverters, or other AC power sources to be used for a single load. TSi Automatic Transfer Switches (ATs) are recommended when no downtime from a power outage is tolerated. Typical applications for transfer switches include Internet Service Providers, critical servers and telecom equipment, and export markets with bad power. These rack-mountable ATS ( using below rack-mount kits ) permit daisy chaining with any sinewave UPS, providing unlimited redundancy using any combination of independent (separate) AC circuits, UPS systems, generator-backed AC circuits, and so on. In a sense you can compare ATS strategy with RAID strategy (Redundant Arrays of Inexpensive Disks). 

Please look at the Features/Series Table, or at the more detailed descriptions further down, to determine the ATs series you need. In the table, click on the hyperlink bookmark, such as 'ARm,' to go to that ATs series summary. If you then want more detailed specifications, click on the underlined PDF hyperlink.

TSi Power ~ Automatic Transfer Switch Table


 Automatic Transfer Switch Features 

            ATS Series


  Dual AC Source Input, Single AC Output
  Automatic Switchover and Restore
  Automatic Relays
  Solid-State Relays
  Primary & Backup MUST Be In Phase
  Primary & Backup May Be Asynchronous

  Available In 120V Or 208/230/240V

  Overcurrent Protection - Fuses
  Overcurrent Protection - Circuit Breaker
  User Selectable Transfer Times
  Rack-mountable ( ARm - Front Kit Only )
  Alarm Contacts Interface
  Audible Alarm
  Alarm Enable/Disable Switch

TSi ~ Automatic Transfer Switch Series
(Click on images below for larger picture view, or underlined hyperlink to view full brochure / specs pdf)

The ATs Series
ATs-1000-30A-40A ~Two 120V inputs, one 120V output.
~Two 208/230/240V inputs, 1 output.
TSi Power’s ATs Series user customizable AC Automatic Transfer Switches are for enabling the use of redundant power sources, such as small Uninterruptible Power Systems feeding industrial controls, PLC cabinets, internet servers, telecom systems, etc. 

The ATs Series rack-mountable automatic transfer switch utilizes solid-state transfer relays with user selectable transfer times, and allows asynchronous power sources (sources do not have to be in phase with each other). ATs units incorporate DB9 communications ports and built-in circuit breakers. They come in a standard hardwire configuration, and can be ordered with optional cords and plug/receptacles. An eight receptacle output unit is also available.

Custom OEM solutions are also possible.


The ARm Series - For UPS Maintenance Bypass
ARm-1000 ~ Two 120V AC inputs, one 120V output, 15 Amps. 
~ Two 208/230/240V AC inputs, one output, 10 Amps.
TSI Power's Automatic Redundancy Module is designed to provide absolute power protection for your mission-critical computers and equipment. It will provide uninterrupted AC to your load even in the event of one UPS failure. ARms your critical equipment against extended power outages and catastrophic system shutdowns caused by accidental circuit breaker trips, UPS overload conditions, weak or old UPS batteries, routine & preventive maintenance of UPS, accidental UPS shut down, loose power cords, or UPS failure.
Note: Since these require two synchronized power inputs, these are most often used as UPS maintenance bypass units.
The ARm-FAA Series - For UPS Maintenance Bypass
ARm-1000FAA  ~ Two 120V AC inputs, one 120V output, 15A. 
Same as above ARm Series, but this redundant transfer switch has a wider and deeper enclosure to facilitate more universal rack-mounting systems.

Rack-Mounting Kits For ARm & ATs Series
Rack-Mount Kits enable TSi's ARm and ATs automatic transfer switch products to be placed virtually anywhere that fits your space considerations.  This includes desktop and floor mount options. If a rack mount configuration is what you require, TSi's ARm-FAA and ATs systems are designed to accommodate most standard component rack enclosures. With a simple rack mount kit option, you can place your ARm, ATs, rack-mountable UPs, and/or INv, in either a 19". 23", and 24" rack and facilitate the space requirements of your systems, not the ARm, ATs, INv, or UPs.

TSi Power is also a custom automatic transfer switch & bypass manufacturer.
For your OEM or special applications, please call. 

Back To Top


                                               CareBase ~ PO Box 2987 ~ Glenwood Springs, Colorado  81602-2987 ~ USA ~ +1 970 945 2770 ~ 800.430.2770 (USA/CAN)
                                                   Please e-mail re: questions, RFQs, applications, etc. Copyright 1988- 2006 CareBase
                                                                                                                                  Hit Counter