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GE DS3800HMPK1N1K
Product Name: GE Speedtronic Mark IV Microprocessor Regulator Board
Product Introduction: The DS3800HMPK1N1K is the central microprocessor regulator board for GE Speedtronic Mark IV gas- and steam-turbine control racks. It hosts the primary CPU, high-speed RAM/ROM, and deterministic control algorithms that govern speed PID, load control, temperature limiting, acceleration schedules, and protective tripping.
Detailed content
Technical Specifications:
- Manufacturer: General Electric (GE Energy)
- Product Type: Microprocessor-Based Regulator / CPU Board
- System Compatibility: Speedtronic Mark IV (6BA07 slot)
- CPU: 16-bit, 10 MIPS, deterministic, parity-checked buses
- Memory: 32 kB battery-backed RAM, 64 kB EPROM (expandable to 256 kB)
- Scan Rate: 5 ms (deterministic)
- Analog I/O: 16-bit
- Interfaces: RS-232/485 & Ethernet
- Operating Temperature: -20°C to +70°C
- Safety: SIL-2 safety logic
- Isolation: 1500 V isolation; TVS diodes and opto-isolators clamp >500 V spikes
- Seismic Qualification: IEEE 344
Functional Features:
- Hardware-deterministic (no firmware download)
- Suitable for safety-related turbine control when triple-redundant
- Surge-hardened for turbine deck
- 1500 V isolation prevents ground-fault propagation to I/O cards
- 5 ms control scan and 16-bit analog I/O ensure 25-year service life in baseload duty
Working Principle: The card occupies one 6BA07 slot and provides the central microprocessor, high-speed RAM/ROM, and deterministic control loops for turbine speed, load, temperature, and protection algorithms. It supports real-time data exchange with I/O, servo, and communication daughterboards.
Application Scenarios:
- Gas Turbine Speed & Load Control: Primary CPU for Frame 7/9 heavy-duty units: executes speed PID, acceleration schedule, fuel staging, and grid synchronizing. Triple redundancy ensures 99.97% start reliability and 100 k hours.
- Black-Start & Island Mode Operation: Master timing reference for excitation, synchronizing, and load-sharing when grid is lost. Deterministic voter guarantees phase-angle matching <0.5°, mandatory for NERC PRC-024-2 ride-through.
Usage Notes:
- When triple-redundant, it is suitable for safety-related turbine control.
- Its surge-hardened design and 1500V isolation significantly reduce unplanned replacement compared with commercial CPUs.
