Automatic transfer switches for redundant power
Power transfer switches for enabling using redundant ac power sources. i.e. two
UPS inputs, one output
An automatic transfer switch enables redundant UPS, backup generators, or other ac power sources to be used for a single load. TSi Power automatic transfer switches (ATs) are recommended when no downtime from a power outage can be tolerated. Typical applications include Internet service providers, critical servers and telecom equipment, and export markets with bad power. These rack-mountable units permit daisy chaining with any sine wave 120V or 230V UPS up to 40A, providing unlimited redundancy using any combination of independent (separate) ac circuits, UPS systems, photovoltaic, hydro or wind turbine fed dc to ac inverters, 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 ATs and ARm Series features table at the bottom of the page, or the descriptions below, to determine the ATs series you need. If you then want more detailed specifications, click on the model's hyperlink.
Automatic transfer switch series
ATs ~ The ATs Series static
automatic transfer switch is for enabling the use of even asynchronous redundant power
sources, such as uninterruptible power systems and generators feeding industrial
controls, PLC cabinets, internet servers, telecom systems, etc. Another
excellent use of the customizable ATs automatic transfer switch is for
photovoltaic systems used in conjunction with dc to ac inverters and ac
power generators, or the electric utility grid. The ATs Series utilizes
solid-state relays with user selectable transfer times, and allows
asynchronous power sources (ac sources do not have to be in phase with each
other ~ especially useful in mission-critical hospital/dual power grid
situations).
ATs-1000-120V-30A-40A ~ two 120 vac inputs, one 120 vac output,
in 30
amperes and 40 amperes configurations.
ATs-1000E-230V-30A-40A ~
two 208, 230 or 240 vac inputs, one 208, 230 or 240 vac output, in 30 amperes
and 40 amperes configurations.
ARm ~ The
ARm Series automatic redundancy module is designed to provide absolute power
protection for your mission-critical computers and equipment. It can provide
uninterrupted ac to your load in the event of one ac source 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 and preventive maintenance of
UPS, accidental UPS shut down, loose power cords, or UPS failure. (Note: ac
sources DO always have to be in phase with each other. As such, these units
are most often used simply as UPS maintenance bypass switches. For
asynchronous power sources, as from two different power grids, see above ATs
Series units).
ARm-1000 ~ two 120 vac
inputs, one 120 vac output, 15 amperes.
ARm-1000E ~ two 208, 230 or 240 vac inputs, one output, 10 amperes.
Mk
~ Rack-mounting kits enable TSi's ARm and ATs automatic transfer switches 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 or ATs automatic transfer switch,
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 or ATs
transfer switch, XINv inverter, or XUPs/UPs.
Rack-mounting kits ~ for all relevant TSi models.
ATs and ARm Series features table
| Features | Series | |
| ATs | ARm | |
| Dual ac source input, single ac output | ||
| Automatic switchover and restore | ||
| Automatic relays | ||
| Solid-state relays | ||
| Rack-mountable (ARm Series - front kit only) | ||
| Primary and backup may be asynchronous | ||
| Primary and backup must be in phase | ||
| Available in 120 vac or 208/230/240 vac | ||
| Overcurrent protection - fuses | ||
| Overcurrent protection - circuit breaker | ||
| User selectable transfer times | ||
| Audible alarm | ||
| Alarm enable/disable switch | ||
| Alarm contacts interface | ||
TSi Power also manufactures custom/bespoke automatic transfer switches. Please call for more information.
