GE DS3800NMEC1K1K | Mark IV Series Motor Exciter Control Module for Gas/Steam Turbines

Description

DS3800NMEC1K1K: Product Overview​

1. Excitation Control: Adjusts the current supplied to the generator’s exciter winding, ensuring the generator produces a stable voltage (e.g., 11 kV for power plants) regardless of load changes.
2. Turbine Speed Regulation: Works in conjunction with other Mark IV components (e.g., speed sensors, fuel valves) to maintain the turbine’s rotational speed (e.g., 3000 rpm for 50 Hz power generation).
3. Automated Procedures: Triggers pre-programmed sequences (e.g., cooldown after shutdown, emergency stop) to protect the turbine from damage and reduce downtime.

• Precision Regulation: Uses advanced algorithms to adjust excitation current in real time, compensating for fluctuations in load, temperature, or fuel quality. This ensures the generator’s voltage remains within ±0.5% of the setpoint—critical for grid stability.
• Seamless Integration: Conforms to VMEbus Rev. C.1, allowing it to communicate with other Mark IV components (e.g., I/O modules, human-machine interfaces) via RS-485 or CANopen. This compatibility enables centralized control of the entire turbine system from a single interface.
• Rugged Design: Built with industrial-grade components (e.g., solid-state relays, temperature-resistant capacitors) to withstand harsh environments (e.g., high vibration, extreme temperatures) commonly found in turbine halls.

• Reliability: The Mark IV system has a proven track record of 24/7 operation in power plants worldwide, with mean time between failures (MTBF) exceeding 100,000 hours.
• Legacy Compatibility: The module is designed to work with existing Mark IV components (e.g., DS3800HMPG CPU card, DS3800HNMB null modem card), reducing the cost of system upgrades.
• Scalability: Supports expansion with additional I/O modules or communication gateways to accommodate growing system demands (e.g., adding renewable energy sources to the grid).

  

  GE DS3800DMPC1F1E

Technical Specifications​

• Model Number: DS3800NMEC1K1K (Variant: DS3800NMEC1K1K)
• Manufacturer: GE (General Electric)
• Product Type: Motor Exciter Control Module
• Series: Mark IV (Gas/Steam Turbine Control)
• Bus Standard: VMEbus Rev. C.1 (supports 8/16/32-bit data transfer)
• Communication Interfaces: RS-485 (up to 1 Mbps), CANopen (up to 500 kbps)
• Power Supply: 12V DC (±10% tolerance)
• Input Signals: Generator voltage (0–15 V AC), turbine speed (0–10 V DC), fuel flow (4–20 mA)
• Output Signals: Excitation current (0–10 A DC), control signals (5 V DC)
• Operating Temperature: -40°C to +52°C (-40°F to +125°F)
• Storage Temperature: -40°C to +85°C (-40°F to +185°F)
• Humidity: 5–95% non-condensing
• Dimensions: 7.5 x 5.5 x 1.5 inches (190 x 140 x 38 mm)
• Weight: 1.2 lbs (0.54 kg)
• Certifications: CE, UL (inferred from GE industrial product standards)

Core Features & Customer Value​

The module’s ability to trigger emergency stop sequences (e.g., closing fuel valves, activating brakes) in case of a fault (e.g., overspeed, low oil pressure) protects the turbine from catastrophic damage. This is critical for ensuring the safety of personnel and equipment in power plants.

GE DS3800DMPC1F1E

Typical Applications​

1. Power Generation:
   • Controls the excitation system of gas and steam turbines in natural gas, coal-fired, and nuclear power plants.
   • Maintains generator voltage stability and turbine speed, ensuring reliable power output to the grid.
2. Manufacturing:
   • Used in industrial turbines (e.g., for compressed air, steam) to regulate speed and torque in manufacturing processes.
3. Petrochemical Industry:
   • Controls turbines in refineries (e.g., for pumping crude oil, generating process steam), ensuring safe and efficient operation in hazardous environments.