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GE C994D128-096A224
Product Introduction: The GE C994D128-096A224 is a speed and load control module in the GE Digital Energy C994D series, dedicated to speed control and load distribution of gas turbines and steam turbines. It is a core component of power plant governor systems. “C994D” denotes the C994D series speed/load controller; “128” is the functional code for speed control + load control; “096” represents hardware version/input configuration; “A224” is a specific configuration code for output type/communication.
Detailed content
Technical Specifications:
- Series: C994D
- Function: Speed control / Load control
- Speed input: 4–20 mA or pulse signal (magnetic/electric or Hall-effect)
- Speed measurement range: 0–6000 RPM (adjustable)
- Load command input: 4–20 mA or 0–10 V DC
- Valve position feedback: 4–20 mA (LVDT)
- Valve position output: 4–20 mA (drives electro-hydraulic converter)
- Control accuracy: ±0.1%
- Response time: ≤ 100 ms
- Communication interface: serial communication (RS-485/RS-232)
- Power requirement: 24 V DC or 110/220 V AC/DC
- Operating temperature: -10 °C to +55 °C
- Protection rating: IP54 (panel mounting)
- Certifications: UL, CSA, CE
Functional Features:
- Speed control: receives speed signal, PID-adjusted valve command output
- Load control: receives load command, controls unit output
- Valve position control: closed-loop valve opening control
- Speed droop rate adjustable (typically 3%–5%)
- Acceleration/deceleration rate limiting
- Valve position limits (maximum/minimum opening)
- Cascade control mode supported
- Field parameters set via keys or software
Material Composition:
- Housing: cast aluminum alloy with powder coating (RAL 7035)
- Front panel: brushed stainless steel
- Internal PCB: FR-4 with conformal coating
- Terminals: copper alloy with nickel plating
Structural Features:
- 1/4 DIN (96 mm × 96 mm) panel cutout mounting
- Front panel: 4-digit LED display + 4 push buttons
- Rear panel: current input/output terminals + communication terminals + power terminals
- DIN 35 mm rail mounting
Application Scenarios: Gas turbine control, steam turbine control, industrial governors, generator set governor systems.
Working Principle: The speed sensor signal is processed and compared with the setpoint. The PID controller outputs a valve position command, which drives the regulating valve via an electro-hydraulic converter, thereby changing steam/air intake to control speed and load. In load mode, it receives external load commands to directly control valve opening.
Installation Requirements:
- 96 mm × 96 mm panel cutout
- Use shielded cable for speed sensor signal lines
- Use shielded twisted pair for valve position feedback LVDT signal lines
- Connect power per terminal diagram, observing polarity
Usage Notes:
- Speed signal must match controller input type (4–20 mA or pulse)
- Valve command output must be amplified via electro-hydraulic converter to drive the oil servomotor
- Control parameters (PID parameters, droop rate, etc.) must be tuned according to unit characteristics
- Regularly calibrate speed measurement accuracy
