Description
ALSTOM DFI-150-0003
Technical Specifications:
- Input Signals: Field current, field voltage feedback signals, contact status signals
- Output Signals: Digital pulse command for power converter
- Control Power: 24VDC
- Isolation: Galvanic isolation between low voltage control side and high power field side
- Operating Temperature: -10℃ ~ +60℃
- Storage Temperature: -40℃ ~ +85℃
- Humidity: 5%~90% non-condensing
Function Features:
- Field voltage and field current signal acquisition and isolation transmission
- Digital command transfer to excitation power converter
- Field circuit fault detection and alarm signal output
- Electrical isolation between low-voltage control system and high-power field circuit
- Real-time status feedback to main excitation controller
Application Scenarios:
- ALSTOM large generator excitation cabinet
- Thermal and hydropower station excitation system spare parts
- Power plant excitation system maintenance and retrofit
Material Composition:
- Substrate: Multilayer FR4 fiberglass printed circuit board
- Components: Isolation amplifiers, digital logic chips, surge protection components
- Connectors: Gold-plated rack edge connectors
Structural Features:
- Plug-in rack card design for chassis installation
- Front panel with status LED indicators
- Metal shielding cover for electromagnetic interference suppression
- Edge connector connecting to cabinet backplane
Working Principle: The board collects field voltage and field current feedback signals from excitation power circuit. Signals pass through isolation amplifier to isolate high voltage side and low voltage control side. It receives digital control pulses from main controller and transmits these commands to thyristor power converter. It detects abnormal field circuit conditions and sends fault alarm signals back to main controller.
Installation Requirements:
- Install into standard rack inside excitation cabinet
- Implement anti-static protection during handling
- Check backplane connector condition before inserting card
- Maintain cabinet temperature within rated range
- Complete reliable protective grounding of cabinet
Usage Notes:
- Cut off all high voltage and control power before removing or inserting the board
- Wear anti-static wristband when handling PCB
- Avoid contamination on gold-plated connector pins
- Regularly inspect LED status during operation
- Prevent dust buildup on circuit board
