Borri STS300 400V 100A Three Phase Static Transfer Switches

SKU: STS300-100
In stock deliveryIn stock (1), despatch within 20 working days
Lead times delivery guide

Delivery charges are calculated based on weight, country, postcode and service

Price check guarantee

Our Price Check Guarantee ensures value for money when buying this product


The Borri UPS STS300 100A is a centralised static transfer switch (STS) designed to provide an automatic transfer between dual three phase power sources to protect downstream critical loads. The dual power sources can be uninterruptible power supplies, mains power supplies or a combination of these. The STS has a graphical LCD display, mimic LED panel and keypad and operates up to 99% efficiency.


  • Rugged design and high reliability
  • Short circuit transfer inhibit for robust load protection
  • High overload capability and high fault current management
  • Enhanced safety, redundant control logic, SCR fault detection and embedded backfeed protection
  • Minimum maintenance: full front accessibility to all components and high material build quality
  • Dual manual bypass for complete source independence during maintenance
  • Remote monitoring via dry contact relay card, RS232 and RS485 serial ports and MODBUS
  • Bottom and top cable entry for ease of installation
  • True oversized neutral (2x In), redundant cooling with monitored fans and redundant (3×3) internal power supply for system control board reliability
  • Options: customisation for harsh environments and specific applications