This module is a triple-redundant (TMR) turbine protection board, designed to operate independently of the main turbine control system. It provides critical safety protection functions such as emergency overspeed, emergency shutdown, and trip solenoid valve control, meeting the high-integrity and availability requirements of modern turbine units.

Architecture and Reliability

Redundant Structure:

Triple redundancy R8 / S8 / T8 (original X / Y / Z)

Hot-Swap Capability:

Supports online hot plugging without interrupting unit operation

Eliminates single-point failures and maximizes system availability

Core Protection Functions

Emergency Overspeed Protection (EOS)

Emergency Stop (E-Stop)

Trip solenoid valve actuation

Independent protection logic separate from the main control processor

I/O and Communication Interfaces
Signal Inputs

3 × analog current inputs

Pressure / flow protection

9 × thermocouple inputs

Exhaust temperature and over-temperature protection

Communication

IONet communication port

Status reporting and parameter configuration

Communication loss does not affect local trip logic execution

Relay Trip Control

Trip Relay Terminal Board: TREG

Relay Configuration:

12 relays total

9 relays arranged as three independent 2-out-of-3 (2oo3) voting groups

Drives three trip solenoid valves

Ensures:

Reliable trip execution

Prevention of nuisance trips and failure-to-trip events

Power Supply

125 VDC – Trip circuit power

+5 VDC – Core logic power

Integrated multi-voltage monitoring for power integrity supervision

Mechanical & Environmental Specifications

Form Factor:

6U VME single-slot board

Dimensions (H × W × D):

233.4 × 160 × 330 mm

Weight:

Approx. 0.45 kg (1 lb)

Operating Temperature:

–30 °C to +65 °C

Terminal Board Compatibility

TPRO – Signal input terminal board

TREG – Trip relay terminal board

TRPG – Power supply negative terminal board

Core Features and Advantages
Independent Safety Protection

Operates as a stand-alone triple-redundant protection circuit

Provides safety interlocks including:

Emergency overspeed

Over-temperature

Emergency shutdown

Designed to meet SIL safety level requirements for turbine protection systems

Voting Logic Control

2oo3 voting logic implemented via relay groups

High fault tolerance and deterministic trip behavior

Prevents misoperation and refusal-to-trip scenarios

Multi-Signal Protection Coverage

Combined monitoring of:

Process parameters (pressure / flow)

Thermal parameters (exhaust temperature)

Supports backup and synchronous safety inspection

IONet-Based Status Integration

Seamless communication with the main controller via IONet

Protection logic remains fully independent of communication health

Online Maintenance Capability

Triple-redundant architecture allows:

Replacement of a single module during operation

No impact on turbine availability

Improves maintainability and reduces downtime

Hardware Compatibility

Fully compatible with IS215VPROH2B

Functionality and interfaces are equivalent

Supports direct replacement without system reconfiguration

Typical Applications

Steam turbines

Gas turbines

Aeroderivative turbine units

Safety-critical turbine protection systems requiring TMR architecture

GE IS215VPROH2BC｜Turbine Protection Board｜

Triple-redundant architecture allows:

Replacement of a single module during operation

No impact on turbine availability

Improves maintainability and reduces downtime

Hardware Compatibility

Fully compatible with IS215VPROH2B

Functionality and interfaces are equivalent

Supports direct replacement without system reconfiguration

Typical Applications

Steam turbines

Gas turbines

Aeroderivative turbine units

Safety-critical turbine protection systems requiring TMR architecture