2-o-o-3 Trip Block (TSM)

Provide retrofit solution of Turbine Trip Actuator (2oo3 Trip Block)

We provide the  2-o-o-3 (2-out-of-3)  SIL-3 Trip block to retrofit the existing mechanical trip unit (MOST) or single solenoid design. 

The three gate valves are switched in succession. The trip valve is only actuated once the two switching magnets have been shutdown. Practically speaking, this means a 2-out-of-3 voting logic in hydraulically actuating the trip valve.  All the TSM 2-o-o-3 needs to function is an oil supply and electric auxiliary power.

Key features:

  • Reliable actuation of the trip valve in combination with prevention of erroneous actuations
  • High-availability redundancy system, 2-out-of-3 selection,
  • Compact electro-hydraulic unit
  • Supports testing during operation
  • Replacement of electronic component during operation
  • Optional explosion protection available (ATEX, FM / CSA etc.)
  • Seamless integrate with the Sensonics TMR Overspeed Protection System and others