ABB ACBU‑A1 (3AFE68312574) Active Crowbar Control Board for ACS800‑67 DFIG Wind Turbine Converter
ABB ACBU‑A1 (3AFE68312574) Active Crowbar Control Board for ACS800‑67 DFIG Wind Turbine Converter - Image 2

ABB ACBU‑A1 (3AFE68312574) Active Crowbar Control Board for ACS800‑67 DFIG Wind Turbine Converter

  1. ACBU‑A2 — Upgraded second‑generation active crowbar unit
  2. AINT‑14C — Main Interface Board
  3. AINP‑01C — Power Supply Board for Converter
  4. AFIN‑01C — Fiber Communication Board
  5. APOW‑01C — Auxiliary Power Trigger Board
  6. ASFC‑02 — Current Measurement Board
  7. ARTU‑01 — Temperature Monitoring Unit
  8. ‑67‑0730‑7 — Complete 7.3MW DFIG wind converter
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Description

ABB ACBU‑A1 (3AFE68312574) Active Crowbar Control Board for ACS800‑67 DFIG Wind Turbine Converter

 

Product Introduction

The ABB ACBU‑A1 is a core active crowbar circuit board exclusively developed for ABB ACS800‑67 doubly‑fed induction generator (DFIG) wind power converters. It integrates high‑power thyristor, gate drive circuit, signal sampling and fault detection hardware on one single PCB assembly. During grid voltage dip or grid short‑circuit failure, the unit triggers the crowbar loop within microseconds to provide a low‑impedance bypass path for rotor surge current. This protection mechanism prevents overcurrent burnout of the rotor‑side IGBT power modules and the generator winding. Communicating with the main converter control unit via fiber DDCS link, it executes fast protection action and feeds back crowbar working status and fault codes. As a critical nacelle spare part for onshore and offshore wind farms, the ACBU‑A1 is widely stocked for preventive maintenance and emergency replacement of aging ACS800‑67 converter cabinets.

ACBU‑A1

Specific Application Information

  • Grid fault protection for DFIG turbines: Activate crowbar bypass under grid voltage sag, short‑circuit and unbalanced grid events.
  • Rotor overcurrent diversion: Discharge the induced high surge current from generator rotor winding to avoid converter damage.
  • Thyristor firing & gate driving: Output high‑precision trigger pulses to control the high‑power crowbar thyristor stack.
  • Real‑time circuit monitoring: Sample crowbar current, thyristor temperature and power supply status continuously.
  • Fault signal feedback: Send crowbar activation, overheat, trigger failure alarms back to ACS800 main control board.
  • Low voltage ride‑through (LVRT) cooperation: Assist the whole converter to fulfill grid code LVRT requirements of wind farms.
  • Converter cabinet interlock: Trigger system safe shutdown when crowbar hardware failure is detected.

 

Technical Parameters

Parameter Specification
Model ACBU‑A1
ABB Part No. 3AFE68312574
Product Type Active Crowbar Control Board
Compatible Converter ABB ACS800‑67 DFIG wind turbine converter
Main Power Device Integrated high‑power thyristor assembly
Communication DDCS fiber optical communication with main controller
Logic Power Supply 24 VDC internal cabinet power
Operating Temperature -20°C ~ +50°C (inside wind turbine nacelle cabinet)
Response Time Microsecond‑level crowbar triggering
Mounting Built‑in installation inside ACS800‑67 power cabinet
Approx. Weight ~11.4 kg
Origin Finland
Certification CE compliant for wind power application

 

Main Features

✅ Microsecond fast triggering: Ultra‑fast crowbar response to suppress rotor inrush current the instant grid failure occurs. ✅ Integrated thyristor stack assembly: Thyristor, trigger drive and monitoring circuit assembled as one complete unit for direct replacement. ✅ DDCS fiber communication: Noise‑immune optical link to avoid EMI interference inside high‑power converter cabinet. ✅ Multi‑point condition monitoring: Real‑time detection of thyristor temperature, trigger circuit health and crowbar current. ✅ LVRT grid‑code support: Hardware foundation for wind turbine low voltage ride‑through capability. ✅ High vibration resistant design: Reinforced PCB and locking components adapted to continuous nacelle vibration. ✅ Complete fault diagnosis: Record fault event logs for post‑failure analysis by wind farm service engineers. ✅ Plug‑in cabinet spare unit: Modular assembly for quick swap to cut wind turbine downtime.

 

Application Scenarios

  1. Onshore DFIG Wind Farms: ‑67 converter cabinet crowbar protection replacement.
  2. Offshore Wind Turbine Nacelles: Critical power electronic spare for offshore wind generator maintenance.
  3. Wind Farm Retrofit Projects: Upgrade aging crowbar assemblies to restore turbine LVRT performance.
  4. Wind Turbine Condition Repair: Emergency spare for sudden converter crowbar board failure.
  5. DFIG Generator Protection System: Rotor winding and power converter overcurrent safeguard.

 

Supporting Components

  • ABB ‑67 main control unit
  • DDCS optical fiber cables
  • Converter cabinet 24V DC power supply
  • High‑power thyristor heat sink assembly
  • Current sampling sensors
  • DriveWindow commissioning & diagnostic software
  • Cabinet wiring harness and high‑voltage busbar connectors
  • Spare cooling fans for power cabinet

 

Related Series Models (ABB Wind ‑67 Converter Family, 8 Models)

  1. ACBU‑A2 — Upgraded second‑generation active crowbar unit
  2. AINT‑14C — Main Interface Board
  3. AINP‑01C — Power Supply Board for Converter
  4. AFIN‑01C — Fiber Communication Board
  5. APOW‑01C — Auxiliary Power Trigger Board
  6. ASFC‑02 — Current Measurement Board
  7. ARTU‑01 — Temperature Monitoring Unit
  8. ‑67‑0730‑7 — Complete 7.3MW DFIG wind converter

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