The GE IS220PPROS1B is an Emergency Overspeed Protection I/O Module designed for the Speedtronic™ Mark VIe turbine control system,
providing critical safety functions to prevent catastrophic turbine failures.
1. Key Functions
Overspeed Protection:
Monitors turbine shaft speed via magnetic pickups or proximity probes.
Triggers emergency shutdown (ESD) if speed exceeds safe thresholds (typically 110–120% of rated speed).
Redundant Voting Logic:
Uses 2-out-of-3 (2oo3) voting logic for fail-safe operation, minimizing false trips.
Cross-checks signals from multiple sensors to ensure reliability.
Hardware-Based Safety:
Independent of software control, ensuring protection even during system faults.
Directly interfaces with trip solenoids to cut fuel supply or activate brakes.
Diagnostics & Testing:
Self-tests sensor health and circuit integrity at startup and runtime.
Logs overspeed events and fault conditions for maintenance analysis.
2. Technical Specifications
Inputs: Accepts signals from speed sensors (e.g., 5V AC/DC magnetic pickups).
Response Time: <10 ms for emergency actions.
3. Applications
Gas/Steam Turbines: Prevents mechanical damage from overspeed events.
Power Plants: Critical for API 612/ISO 10436 compliance in turbine safety systems.
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