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Static Transfer Switch
Static Transfer Switch
Single Phase STS

Static Transfer Switches

Single & Three Phase STS Systems

BPC Automatic Static Transfer Switches (STS) enable automatic or manual transfer between two AC power supply sources, ensuring a transfer time of less than 1/4 of a cycle.

Static Transfer Switches ensure highest availability of the power supply to sensitive and critical applications. The installation of an STS ensures 2N architecture is achieved and allows loads with single feeds to always be supplied by the highest quality power. 

The use of transfer switches and 2N architecture increases the maintainability of the switch panels and upstream equipment.

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  • Dual Source
  • Industrial
  • Reliable

The use of an STS within an electrical distribution system provides a means of secure protection against any potential disruption of the power supply, due to interruptions of the supply source or failure of distribution lines caused by environmental phenomena or human error.

The Static Transfer Switch provides a guaranteed means of switching between two alternative and independent power sources thus ensuring a continued supply of power to any critical load.

The switching can either be AUTOMATIC, should incoming supply fall outside the predefined window of operation (user-defined), or MANUAL, should an operator want to force switching between the two input supply sources from the mimic display panel or via a remote connection.

  • Increased power quality and increased noise reduction 
  • Selectable preferred source and method of transfer
  • Power redundancy
  • Power blackout protection
  • Automatic static switching ultra fast Break Before Make transfer permits switching between two sources
  • Power event logging
  • Less than 5ms transfer between synchronised sources
  • Switched neutral option maintains isolation between sources
  • Remote management of power events
  • Hot swappable option for 2 pole range
MODEL 2 POLE 3 POLE 4 POLE
Range 32A / 63A / 120A 50A / 100A / 150A / 200A / 250A / 300A / 400A / 600A / 800A
Input Voltage (Ph-Ph) 220 / 230 / 240 VAc (1Ph + N + PE) 380 / 400 / 415 Vac (3Ph + N + PE)
Input Voltage Range 180 - 246 Vac (Line to Neutral)
Input Frequency 50 / 60Hz
Transfer Type ''Break Before Make'
Transfer Methods Automatic / Manual / Remote
Transfer Control Synchron Adjustable display delay (non-synchron) Zero current (non-synchron)
Transfer Time <4ms for synchronous sources, <10ms for non-synchronous sources 
Switching Type 2 poles: 1 phase + neutral switching 3 poles: 3 phase switching 4 poles: 3 phase + neutral switching
Output Current Crest Factor 3:1
Admissable Overload 0 - 100% continuous / 101 - 150% for 1 min / 151 - 200% for 10 sec / >200% for 250ms
LCD Panel and Mimic Standard
Protections Output overload and short circuit protection, over temperature protection, back feed protection, SCR fault protection
Communications RS232 standard / RS485 optional
TCP/IP Connection Optional
Dry Contacts (programmable relay outputs) 3 4
Cooling Forced Cooling (redundant fans)
Operating Temperature 0 - 40°C
Storage Temperature -10°C ~ +50°C
Relative Humidity 90% max. (non-condensed)
Protection Degree IP20
Standards  EN62310-1, EN62310-2

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