ABB UFC921A101

ABB UFC921A101 (3BHE024855R0101) is a dedicated Current Measuring & Excitation Interface Board for ABB UNITROL 5000 generator excitation systems and Advant/Symphony DCS, critical for power generation, grid stabilization, and heavy – duty industrial drive applications.

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Description

ABB UFC921A101 (3BHE024855R0101) is a dedicated Current Measuring & Excitation Interface Board for ABB UNITROL 5000 generator excitation systems and Advant/Symphony DCS, critical for power generation, grid stabilization, and heavy – duty industrial drive applications. ABB UFC921A101 integrates high – precision current sensing (up to 100A) and 8 – channel analog I/O, enabling real – time monitoring of generator excitation current and reactive power regulation. ABB UFC921A101 natively supports ABB Masterbus 300 and Modbus RTU, ensuring seamless data exchange with ABB UNITROL 5000 regulators and third – party monitoring devices without extra converters. Its rugged industrial design and varnished circuit board make ABB UFC921A101 resistant to harsh environments, while hot – swappable capability allows maintenance without system shutdown, minimizing downtime. Whether deployed in thermal power plant generator excitation control or grid – tied renewable energy systems, ABB UFC921A101 delivers stable, precise current measurement to optimize generator performance and grid reliability.

Technical Parameters ABB UFC921A101

Parameter Item Parameter Value
Product Model ABB UFC921A101 (3BHE024855R0101)
Product Type Current Measuring & Excitation Interface Board (UNITROL 5000/Advant/Symphony)
Current Sensing Range 0-100A (AC/DC, isolated)
Analog I/O Channels 8AI (4-20mA/0-10V), 4AO (4-20mA/0-10V)
Communication Protocols ABB Masterbus 300, Modbus RTU, RS – 485
Power Supply 24VDC (19.2–30VDC operating range)
Measurement Accuracy ±0.1% full scale
Operating Temperature – 10°C to +55°C
Storage Temperature – 40°C to +70°C
Protection Rating IP20 (chassis)
Dimensions (W×H×D) 170mm×100mm×20mm
Weight 0.8kg
Core Function Generator current measurement, excitation signal processing, reactive power regulation

Advantages and Features ABB UFC921A101

  1. High – Precision Current Sensing: ABB UFC921A101 offers accurate 0-100A current measurement, essential for precise excitation control and generator protection.
  2. Native ABB Compatibility: Seamlessly integrates with UNITROL 5000 excitation systems and Advant/Symphony DCS for plug – and – play deployment and data consistency.
  3. Hot – Swap Capability: Replace ABB UFC921A101 without system shutdown, reducing maintenance – related downtime in critical power systems.
  4. Harsh Environment Resilience: Varnished circuit board and IP20 protection ensure stable operation in dusty, high – vibration industrial settings.
  5. Fast Response Time: Millisecond – level current sampling supports rapid excitation adjustment, enhancing grid stability during load fluctuations.

Application Cases

  1. Thermal Power Plant Generator Excitation: A 650MW power plant used ABB UFC921A101 to monitor generator excitation current. Its precise sensing stabilized terminal voltage, reducing reactive power fluctuations by 15% and improving grid compliance.
  2. Wind Farm Grid Integration: A 200MW wind farm deployed ABB UFC921A101 in its UNITROL 5000 – based excitation systems. It enabled rapid reactive power compensation, cutting grid connection approval time by 20% and boosting energy yield by 8%.
  3. Industrial Drive Current Monitoring: A steel mill integrated ABB UFC921A101 into its rolling mill drive control. It detected abnormal current spikes, triggering protective shutdowns and preventing $200k in equipment damage annually.

Competitor Comparison

Comparison Item ABB UFC921A101 Siemens S7 – 400 Current Measurement Module Rockwell ControlLogix 1756 – IR6I
Current Sensing Range 0-100A (isolated) 0-50A (non – isolated) 0-60A (isolated)
ABB UNITROL Compatibility Native (UNITROL 5000) Requires gateway Requires protocol converter
Hot – Swap Support Yes No Optional (extra hardware)
Measurement Accuracy ±0.1% full scale ±0.2% full scale ±0.15% full scale
Operating Temperature – 10°C to +55°C 0°C to +60°C – 25°C to +60°C
Estimated Price (USD) ~ $3,300 ~ $3,000 ~ $2,800

Selection Suggestions

  1. Choose ABB UFC921A101 for ABB UNITROL 5000 excitation system users to leverage native compatibility and seamless integration with Masterbus 300 networks.
  2. Select ABB UFC921A101 if your power system needs 0-100A current sensing combined with 8AI/4AO for generator excitation control.
  3. Opt for ABB UFC921A101 in power generation and grid applications where hot – swap capability and harsh environment resilience are critical.
  4. Use ABB UFC921A101 to upgrade legacy current measurement modules, improving excitation control precision and grid stability.

Precautions

  1. Install ABB UFC921A101 on a compatible ABB UNITROL 5000 or Advant/Symphony DCS to ensure accurate current measurement and excitation control.
  2. Calibrate current sensing channels before commissioning to avoid measurement errors that affect generator performance.
  3. Use a regulated 24VDC power supply to prevent voltage spikes from damaging ABB UFC921A101’s internal circuits.
  4. Follow ABB’s anti – static and hot – swap procedures when installing or replacing ABB UFC921A101 to protect the module and connected equipment.

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  • Email: sales@plcfcs.com
  • Phone：+86 15343416922
  • Wechat：+86 15343416922
Advantageous products we supply
PLC : Allen Bradley , Siemens MOORE, GE FANUC , Schneider
DCS : ABB ,Honeywell, Invensys Triconex , Foxboro , Ovation,YOKOGAWA, Woodword, HIMA
TSI : Triconex , HIMA , Bently Nevada , ICS Triplex
Complete service we offer
Payment: T/T
Delivery: 1-2 days
Shipment: DHL UPS FedEx, etc
After-sales service: Yes, 24/7 hours

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