Product Short Description
Triple-redundant protection module within the GE Mark VI turbine control family, dedicated to emergency overspeed, temperature, and synchronization monitoring for gas and steam turbines.
Technical specifications
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Channels
– 3× independent overspeed inputs (magnetic pickup)
– 6× RTD/thermocouple temperature inputs (universal)
– 1× synchronization input (sync-check)
Description
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Processing
– 32-bit DSP core, 40 MHz
– 1 MB SRAM + 512 kB Flash for trip logic and event storage -
Response time
– Overspeed: < 30 ms from detection to trip relay closure
– Temperature: configurable trip delay 0.1 – 10 s -
Outputs
– 6× Form-C trip relays, 250 VAC/DC, 8 A resistive
– 3× status LEDs per channel (green/yellow/red) -
Diagnostics
– Built-in self-test every 100 ms
– Fault logger with 1000-entry ring buffer -
Communication
– 10/100 Mbit Ethernet for configuration and remote diagnostics
– RS-485 Modbus RTU for DCS integration -
Power
– 24 VDC nominal (18 – 30 V range)
– Redundant power inputs with automatic switch-over -
Environmental
– Operating: –40 °C to +70 °C
– Storage: –55 °C to +85 °C
– Humidity: 5 % – 95 % non-condensing
– Shock/Vibration: 10 g, 5 – 500 Hz per IEC 60068-2-6 -
Physical
– 6U single-slot VME board
– Dimensions 233 mm × 160 mm × 20 mm
– Weight 0.9 kg
Key features
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Triple-redundant architecture: three independent processing paths with 2-out-of-3 voting
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Hot-spare capability: failed module can be replaced online without trip
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Fail-safe design: loss of power or communication forces relays to trip
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Configurable set-points and trip curves via Ethernet web interface
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Conformal-coated board for harsh environments
Applications
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Gas turbines: overspeed, exhaust-temperature, and sync-check protection
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Steam turbines: rotor-speed, metal-temperature, and grid-synchronisation trips
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Combined-cycle plants: coordinated protection across HRSG and turbine trains
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Retrofit projects: drop-in replacement for older Mark V protection racks
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