GE DS200TCEAG1ACB – Emergency Overspeed Protection Board

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Product Introduction

The DS200TCEAG1ACB is a critical safety component designed for the GE Mark V Speedtronic turbine control system, dedicated to emergency overspeed protection for gas, steam, and hydro turbines. It monitors turbine speed in real time and triggers immediate shutdown commands if the speed exceeds safe limits, preventing catastrophic equipment failure and ensuring personnel safety.

Technical Specifications

Manufacturer: General Electric (GE)
Model: DS200TCEAG1ACB
Series: Mark V DS200 Speedtronic
Type: Emergency Overspeed Protection Board (TCEA)
Speed Inputs: 3 × magnetic pickup (MPU) inputs (0–10 kHz)
Overspeed Threshold: Programmable (100%–120% of rated speed)
Response Time: <10 ms (detection to output trigger)
Outputs: 2 × relay outputs (NO/NC, 24 VDC/5 A) for trip valve control
Processor: High-speed safety-grade microprocessor
Redundancy: Triple modular redundant (TMR) architecture (3 independent speed monitoring channels)
Power Supply: +5 VDC (backplane), 24 VDC (relay outputs)
Weight: ~0.95 kg
Operating Temperature: 0°C to +60°C
Safety Certifications: IEC 61508 SIL 3, UL 508, CSA C22.2 No. 142

Key Features

TMR Safety Architecture: Three independent speed monitoring channels with cross-checking voting logic eliminate single-point failures, meeting SIL 3 safety integrity level requirements.
High-Speed Response: <10 ms detection-to-trip response time ensures immediate shutdown before overspeed causes mechanical damage.
Programmable Threshold: User-configurable overspeed setpoint (100%–120% rated speed) adapts to different turbine models and operating conditions.
Dual Relay Outputs: Two independent relay outputs (NO/NC) provide redundant trip signals to shutdown valves, enhancing safety reliability.
Self-Diagnostics: Continuous on-board diagnostics monitor sensor health, channel integrity, and power supply status; triggers alarm and fault logging for proactive maintenance.

Application Scenarios

Power Generation: Gas/steam/hydro turbines in thermal, combined-cycle, and hydroelectric power plants for critical overspeed protection.
Oil & Gas: Turbine-driven compressors and pumps in refineries, pipelines, and LNG facilities for safety-critical overspeed monitoring.
Industrial Plants: Steel mills, paper mills, and chemical plants with large turbine machinery requiring high-safety overspeed protection.

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