ABB KUC711AE (3BHB004661R0001)

Excitation Control Unit – English Specification

1. General Information

• Model: KUC711AE

• ABB Part Number: 3BHB004661R0001

• Type: Generator Excitation Controller / Power Drive Unit

• System: ABB Symphony Plus DCS, Excitation Systems (EX2000/EXCITE)

• Application: Power plants (turbine/generator), oil & gas, marine, industrial drives

• Function: Precision excitation current regulation, voltage control, grid stabilization

• Origin: Sweden

• Weight: ~2.5 kg

• Form: Rack‑mount, conformal coated, compact power stage

  

  

2. Electrical Specifications

• Control Supply: 24 VDC ±20%, 5 W typical

• Power Stage Input: 400 VAC, 50/60 Hz

• Output (Excitation Field):

  • Voltage: 0–500 VDC

  • Current: 0–10 A continuous

  • Power: Up to 4 kW

• Control Signals:

  • Analog In: 4–20 mA, 0–10 V (setpoint/feedback)

  • Analog Out: 4–20 mA, 0–10 V (monitoring)

  • Digital I/O: 16DI / 16DO, 24 VDC logic

• Accuracy: ±0.1% FS

• Response Time: ≤10 ms

• Isolation: 1500 VAC (control vs power)

• Protection: Overvoltage, undervoltage, short‑circuit, thermal overload, loss of excitation

3. Communication & Interfaces

• Internal Bus: ABB proprietary (Symphony Plus)

• Protocols: Modbus RTU/TCP, RS‑485, Ethernet

• Diagnostics: Onboard LEDs (PWR, RUN, FAULT), fault logging, remote monitoring

4. Environmental Ratings

• Operating Temp: -20 °C to +60 °C

• Storage Temp: -40 °C to +85 °C

• Humidity: 5%–95% RH, non‑condensing

• Vibration: IEC 60068‑2‑6 compliant

• Certifications: CE, RoHS, UL

• Protection: IP20 (module), coated for harsh environments

5. Mechanical & Installation

• Dimensions (mm): ~120 × 80 × 50

• Mounting: Standard ABB rack, hot‑swap compatible

• Cooling: Natural convection

• Wire Gauge: Up to 2.5 mm²

6. Key Features

• High‑Precision Excitation: Fast, stable voltage regulation for generators

• Robust Power Stage: 4 kW output, wide AC input range

• Comprehensive Protection: Guards against common excitation faults

• Seamless DCS Integration: Native support for Symphony Plus and Modbus

• Industrial Hardening: Wide temperature, conformal coating, high isolation

7. Applications

• Synchronous generator excitation (hydro/thermal/gas turbines)

• Grid voltage & reactive power control

• Industrial motor drive excitation

• Marine & offshore power systems

• Backup power plants