The General Electric IS200TREAH1A is a specialized Turbine Emergency Trip Terminal Board designed for the Mark VIe control system. This board serves as a critical interface component for turbine safety, facilitating emergency shutdown sequences and monitoring essential turbine parameters in high-reliability industrial environments.

Features

• Designed for integration within the Mark VIe control architecture.
• Supports Triple Modular Redundant (TMR) system configurations for high-availability safety loops.
• Includes six passive pulse rate inputs for monitoring turbine speed via toothed wheel sensors.
• Provides four voltage detection circuits for monitoring trip strings (24-125 V DC).
• Features three TMR-voted 24 V DC solid-state output contacts for emergency trip initiation.
• Compatible with the IS200WREAH1A aero-derivative expansion option board.

Applications

• Thermal Power Stations: Overspeed protection and emergency trip valve management for steam turbines.
• Cogeneration and Combined Heat & Power (CHP) Plants: Safety management for electricity and process steam generation.
• Oil & Gas Refineries: Protection for FCC compressors and high-pressure pump systems.
• LNG Facilities: Rapid trip response for refrigeration compressors during thermal or pressure anomalies.
• Petrochemical Synthesis: Emergency loop control for syngas compressor trains.

Technical Specifications

Installation Guidelines

• Mount the board within a clean, dust-free industrial enclosure.
• For installations near turbine skids, utilize an IP54 or NEMA 4 rated cabinet.
• Ensure the installation area meets Class I, Division 2, Groups A, B, C, D requirements where applicable.
• Maintain ambient temperatures between -30 degC and +65 degC.
• Ensure adequate clearance for free air convection; do not obstruct board ventilation paths.
• Handle as a static-sensitive device; utilize proper ESD protection during installation and maintenance.
• Verify all connections to the 24-point pluggable barrier terminal blocks or Euro-style box terminals are secure before energizing.

FAQs

What is the primary function of the IS200TREAH1A?

The IS200TREAH1A acts as a terminal board for the Mark VIe system, interfacing with field devices to manage safety-critical functions, including turbine overspeed protection and emergency stop logic.

Which I/O packs are compatible with this board?

This terminal board is designed to work with turbine I/O packs within the Mark VIe system and can be expanded using the WREA option card for aero-derivative turbine applications.

How are turbine speeds monitored by this board?

The board utilizes six passive pulse rate inputs, supporting up to three shafts with two sensors each, to detect speed through toothed wheel sensing.