DS200DCFBG1BJB

Description

1. Product Description

• Fiber-Optic Isolation: 2,500 VDC galvanic isolation between the SCR bridge and control system, eliminating ground loops in generator installations.
• Dual Current Inputs: Redundant measurement for fault tolerance, with ±0.1% accuracy at full scale.
• Modular Design: Directly mounts in the exciter cubicle, supporting up to 90 meters of fiber-optic cabling to the EBKP backplane.
• LED Diagnostics: Real-time status indicators for power (green), signal loss (red), and communication (amber).

2. Product Parameters

Parameter	Specification
Module Type	DC Feedback Board (DCFB)
Channels	2x current (0–500 mV), 1x voltage (0–1,000 V)
Isolation	2,500 VDC (fiber-optic to system ground)
Input Impedance	Current: 100 Ω; Voltage: 100 kΩ
Fiber Type	Plastic (10 m) or hard-clad silica (90 m)
Compatibility	GE EX2100 exciters, Mark VIe systems
Voltage Supply	24V DC (from EX2100 auxiliary power)
Operating Temperature	-40°C to +70°C (generator-compatible)

DS200DCFBG1BJB

3. Advantages and Features

• Reliability: MTBF of 1.8 million hours (GE testing), with conformal coating to withstand generator vibrations (3G rms).
• Precision: Detects current changes as small as 0.01%，enabling early detection of SCR bridge faults.
• Cost Savings: A U.S. coal plant reduced unplanned outages by 35% using the DS200DCFBG1BJB’s redundant current measurement, saving $1.2M annually.
• Scalability: Supports up to 8 DCFB boards per EX2100 system for large generators (e.g., 1,000 MW units).

4. Application Areas and Use Cases

• Power Generation (steam/gas turbines, hydro generators)
• Industrial Motors (synchronous motors in mining)
• Oil & Gas (pipeline compressor excitation)

5. Competitor Comparison

• Redundancy: Dual current channels vs. single-channel designs in legacy models.
• Isolation Rating: 2,500 VDC vs. 1,500 VDC for most industrial feedback boards.
• Temperature Range: Operates at +70°C (15°C higher than competitors) for direct exciter mounting.
  

  DS200DCFBG1BJB

6. Selection Recommendations

• System Compatibility: Ensure your EX2100 exciter uses firmware ≥3.2 and EBKP backplane (e.g., DS200EBKPG1ABB).
• Cabling Distance: Use hard-clad silica fiber for >10 meters or high-temperature routes (e.g., turbine hall installations).
• Budget: Refurbished units from Shanxi Xinyeda cost 30% less than new, with a 1-year warranty.

7. Precautions

• Fiber Handling: Maintain a 1.5-inch bend radius to avoid signal loss; use GE-approved cables (P/N: DS200FIBER1A).
• Shunt Calibration: Recalibrate current shunts annually using GE’s Proficy Machine Edition.
• ESD Protection: Use anti-static gloves—static discharge can damage the 16-bit ADC converter.
• Mounting Torque: Secure the module with 0.5 N·m torque to prevent vibration-induced loosening.