GE

1. Full Model & Model Breakdown

Full Model Name: GE IS200WROBH1AAA Mark VI Relay Power Sensing Board

• GE: Brand (Former GE Energy, currently part of Emerson)
• IS200: Unified prefix for all printed circuit boards of GE Mark VI turbine control system
• WROB: Code for Relay Power Sensing Board
• H1: Hardware version code
• AAA: Official full hardware revision suffix

IS200WROBH1A is the shortened designation, while the formal complete part number is IS200WROBH1AAA.

• Mark VI: Dedicated control system platform for GE gas turbine and steam turbine generator units
• Relay Power Sensing Board: Relay power monitoring and sensing circuit board

IS200WROBH1AAA is the original PCB board for GE Mark VI system, widely deployed for excitation circuits and trip relay circuit monitoring of gas turbines.

2. Main Functions

1. Relay power sensing board specially designed for GE Mark VI turbine control system.
2. Continuously collects supply voltage and operating status of trip relays and interlock relay circuits.
3. Real-time detection of abnormal conditions including power loss, undervoltage and short-circuit in relay power loops.
4. Conditions and filters relay control power signals to suppress electromagnetic interference at industrial sites.
5. Transmits converted analog status signals to the main processor through the system backplane.
6. Triggers system diagnostic alarms immediately once power abnormalities are detected and participates in unit protection logic.
7. Ensures reliable power supply for trip relay loops, identifies potential circuit hazards in advance and prevents protection failure to operate.

3. Applications

1. Compatible with control systems of GE Mark VI gas turbine and steam turbine generator units.
2. Mainly installed in turbine control cabinets of thermal power plants and combined-cycle power stations.
3. Focuses on monitoring power supply loops of the Emergency Trip System (ETS) and protection interlock relays.
4. Monitors the health status of power supply for safety protection loops in real time to avoid protection malfunction caused by power failure.
5. Serves as key spare parts for maintenance and fault replacement of gas turbine control systems in power plants.
6. Reduces risks of unplanned unit shutdown resulting from abnormal power supply in trip loops and ensures safe and stable operation of generating units.

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