World class products and solutions. If you need a quick price, tender or specification review.


Automatic transfer switches (ATS) increase the resilience of your electrical power installation. An ATS has dual power inputs (one primary and one secondary) from which it supplies power to the connected loads. If the primary ‘A’ supply fails, the secondary ‘B’ automatically takes over without interruption to the load. ATS use fast acting (within milliseconds) relays to transfer power between the ‘A’ and ‘B’ supplies. The two power supplies can be two separately derived mains power sources or two UPS system outputs or a combination of the two. The ATS have built-in network connectivity for remote management via Web, SNMP, or Telnet interfaces. ATS are typically rack mounted in a server cabinet. Static Transfer Switches (STS) are floor standing designed for larger loads and incorporate a solid state static switch with a zero transfer time.