This site uses cookies which allow us to give you the best browsing experience possible. To find out more, please see our Privacy Policy.


Trip Block TripCon

Trip Block, Electro‐hydraulic Trip Block Assembly for Quick Trip, Electro-hydraulic Safety Control Unit, Fast‑Acting Control System for Actuators, Turbine Trip System

The trip block is an extremely flexible electro-hydraulic safety control unit, which is used for releasing the trip valves (quick trip) on steam turbines, gas turbines and in process engineering. The TripCon has a modular design and the components can be combined in a variety of ways. As a result, Voith provides a trip block with optional functions which offers the best fit for your application, both technically and economically.

All variants of the trip block have a triple-redundant design with a 2oo3 selection (2 out of 3 voting). This means that turbine trips do not take place until at least two channels have been deactivated. An integrated 1oo1 partial stroke test enables a simple check of the function of the trip valve, even during operation. The partial stroke test is available with optional 2oo2 redundancy. An expansion module is also available, which allows the replacement of all solenoid valves during operation.

The TripCon is certified with the SIL 3 Safety Integrity Level. The Mean Time Between Failures (MTBF) for the Voith TripCon is over 100,000 years.

When developing the TripCon, our engineers paid particular attention to large dis­charge volumes and a dirt-resistant design. This allows you to achieve quick and safe turbine shutoff.


Voith Digital Solutions GmbH
Actuators and Governors
Voithstr. 1
74564 Crailsheim, Germany

Tel. +49 7951 32-470
Fax +49 7951 32-605

Technical data

Operating pressure 6 to 180 bar [87 to 2,610 psi]
Flow rate max. 320 l/min [85 gpm] at 6 bar [87 psi] differential pressure
Trip function 2oo3 (2-out-of-3)
Valve partial stroke test
  • 1oo1 (1-out-of-1)
  • Optional 2oo2 (2-out-of-2)
MTBF (Mean Time Between Failures) 100,000 years (calculated in accordance to MIL‑HDBK‑217 and Siemens SN 29500, actual MTBF evaluations from installed products show even higher values)
Ambient temperature -20 to +70°C [-4 to 158°F]
Oil temperature +10 to +70°C [50 to 158°F]
Supply voltage 24 VDC
Current consumption 0.8 A per solenoid
Fail Safe Operation Internal return spring on each solenoid valve
Protection class IP 65
Explosion protection (optional) ATEX/IECEx (II 2G IIC T4, Ta = -20°C…+60°C)
Safety integrity level SIL 3

Typical Applications

  • Safety control for steam turbines
  • Safety control for gas turbines
  • Control of process safety valves
  • Retrofit of non-redundant trip systems

Advantages and benefits

Features Advantages Benefits
  • Modular and compact trip block with a 2oo3 configuration.
  • The TripCon has a great degree of functional flexibility.
  • A range of TripCon models are avail­able for different levels of safety re­quirements in the turbine control system.
  • The TripCon model you select will be suited to your system, both econom­ically and functionally.
  • The competitiveness of the turbine is increased in terms of price, per­form­ance, and quality.
  • Integrated solenoid valves for the partial stroke test.
  • Additional valves, sensors, and pipe­lines for an external partial stroke test system are unnecessary.
  • You get a cost-effective and compact partial stroke test system for the trip valve.
  • A partial stroke test is easy to perform.
  • The safety of your system increases.
  • Extended maintenance intervals for the trip valve reduce the maintenance costs and the outage costs during down times.
  • Solenoid valves with large magnetic forces.
  • The valves are extremely dirt-resistant.
  • In the event of a trip, the turbines are safely shut off.
  • You avoid secondary damage re­sulting from turbine overspeed.
  • Turbine lubricating oil is suitable as the operating medium.
  • One oil supply system for both lu­bri­cating and pilot oil suffices. This keeps maintenance simple, which helps you lower operating costs.
  • Large discharge volumes (320 l/min [85 gpm] at Δp = 6 bar [87 psi]) using the integrated NG16 valve.
  • The flow volumes are very high without an additional shutoff valve.
  • The trip time is short.
  • The TripCon provides you with a safe, simple, and cost effective trip system.
  • Solenoid valves with position feedback.
  • Every solenoid valve can be tested individually during operation be­cause of the 2oo3 selection logic.
  • Automatic test routines are possible for regular testing of the solenoid valves.
  • Your turbine control system will achieve increased safety with little effort.
  • Automatic switching from the 2oo3 selection to the 1oo2 selection when replacing a solenoid valve.
  • Replacement of the solenoid valve improves safety results.
  • Your turbine control system has increased safety.
  • All the solenoid valves can be de­coupled from the hydraulic system.
  • It is possible to replace a solenoid valve during operation.
  • Your production continues to run without interruption.
  • Manually adjustable orifice at the pressure connection P.
  • The closing time of the connected trip valve is adjustable.
  • The TripCon can be optimized to your turbine control system.
  • Hydraulic connection via pipe or flange connection.
  • The TripCon is suitable both for standalone mount­ing and for mounting on the cylinder of the trip valve.
  • Integration into your turbine control system is flexible and can be im­ple­mented economically.

Technical information

TripCon – Superior


  • Trip function: 2oo3
  • Partial stroke test: 2oo2 during operation
  • Replacement of the MV1 – MV5 solenoids during operation
  • Replacement of the MV1 – MV5 solenoid valves during operation
  • Optional Atex

TripCon – Advanced


  • Trip function: 2oo3
  • Partial stroke test: 1oo1 during operation
  • Replacement of the MV1 – MV4 solenoids during operation
  • Replacement of the MV1 – MV4 solenoid valves during operation
  • Optional Atex

TripCon – Special


  • Trip function: 2oo3
  • Partial stroke test: 2oo2 during operation
  • Replacement of the MV1 – MV5 solenoids during operation
  • Replacement of the MV4 – MV5 solenoid valves during operation
  • Optional Atex

TripCon – Basic


  • Trip function: 2oo3
  • Partial stroke test: 1oo1 during operation
  • Replacement of the MV1 – MV4 solenoids during operation
  • Replacement of the MV4 solenoid valve during operation
  • Optional Atex