Protect STS

Static Transfer Switch

63A – 400A: 2 poles
63A – 1000A: 3 poles / 4 poles
63A: 2 poles/3 poles and 4 poles as 19inch rack version

Static Transfer Switches (STS) transfer supply between independent one-phase or three-phase AC power sources. Unlike traditional automatic transfer switches (ATS), Static Transfer Switches (STS) provide 20 times faster load transfer, which ensures the uninterrupted operation of even the most sensitive electronic equipment. Load retransfer to preferred input source is virtually instantaneous.




  • Three redundant power supplies
  • User friendly control panel
  • Fail-Safe CMOS logic
  • Internal redundancy for power supply systems and SCR drivers
  • Easy to install
  • Easy to operate
  • Low installation and maintenance costs
  • Manual bypass
  • Neutral dimensioned for 200 % of nominal current