ABB UNITROL 1010 3BHE035301R0002 Excitation Control Module
Product Overview
The ABB UNITROL 1010 3BHE035301R0002 is a compact, high‑performance digital excitation control module (AVR) designed for small‑to‑medium synchronous generators (typically up to 50 MW). As part of ABB’s UNITROL 1010 series, it integrates advanced regulation logic, I/O, and communication in a single unit, serving as the core of the excitation system for gensets, industrial power plants, and hydro/thermal units where space and cost efficiency are critical.
Key Features
Precision Voltage Regulation
Offers ±0.5% voltage regulation accuracy under steady‑state conditions, with fast dynamic response (<30 ms) to load changes. Maintains terminal voltage stability per IEC 61000‑6‑2 and IEEE 421.5 standards.
Multiple Control Modes
Supports automatic voltage regulation (AVR), constant reactive power (VAR), constant power factor (PF), and manual field current control with bumpless transfer, enabling flexible grid and island‑mode operation.
Integrated Protection Functions
Built‑in protection for over‑excitation, under‑excitation, field overcurrent, loss‑of‑excitation, overvoltage/undervoltage, and overtemperature. Triggers de‑excitation and alarm signals to protect the generator and excitation system during faults.
Compact & Modular Design
All‑in‑one package with integrated power supply, control logic, and I/O; IP20 protection. Vertical panel‑mountable with minimal clearance (50 mm top, 20 mm bottom), ideal for tight control cabinets.
Rich I/O Interfaces
Equipped with 4 analog inputs (CT/PT, 0–10 V, 4–20 mA), 2 analog outputs, 8 digital inputs, 6 digital outputs for excitation, grid, and auxiliary signals.
Industrial Communication
Supports Modbus RTU (RS‑485), Modbus TCP, and optional IEC 61850 for connection to PLC, SCADA, DCS, and remote monitoring systems.
Robust Environmental Performance
Conformal‑coated PCB; operating temperature ‑25°C to +60°C (extended to ‑40°C to +70°C optional); storage temperature ‑40°C to +85°C. Humidity 5%–95% non‑condensing.
Diagnostics & Maintenance
Real‑time monitoring, fault logging, and event recording with time stamp; supports remote parameterization and troubleshooting via ABB’s configuration tool, reducing on‑site maintenance.
Technical Specifications
Manufacturer: ABB
Model: 3BHE035301R0002 (UNITROL 1010, UNS0121A‑Z V1)
Product Type: Digital Excitation Controller / AVR Module
Applicable Generators: 50 kW – 50 MW synchronous generators
Input Voltage: 85–264 VAC, 50/60 Hz; 120/230 VAC nominal
Power Consumption: ≤30 VA
Regulation Accuracy: ±0.5% (steady state)
Response Time: <30 ms (95% step response)
Analog I/O: 4 AI / 2 AO
Digital I/O: 8 DI / 6 DO
Communication: Modbus RTU/TCP, RS‑485; IEC 61850 optional
Protection Functions: Over‑excitation, under‑excitation, field overcurrent, loss‑of‑excitation, overvoltage, undervoltage, overtemperature
Operating Temperature: ‑25°C to +60°C
Storage Temperature: ‑40°C to +85°C
Protection Class: IP20
Dimensions (W×H×D): 120 × 260 × 85 mm
Weight: 2.9 kg (approx.)
Certifications: CE, UL, RoHS, DNV‑GL
Core Functions
The 3BHE035301R0002 performs closed‑loop excitation control by sampling generator voltage, current, and grid parameters in real time. It executes PID control and optional PSS (Power System Stabilizer) algorithms to adjust thyristor firing angles, stabilizing output voltage and damping low‑frequency oscillations. It also provides system‑wide health monitoring, fault diagnosis, and protective tripping/de‑excitation commands, with data logging for maintenance and compliance.
Typical Applications
Industrial Power Plants: Steel, chemical, pulp/paper, and petrochemical on‑site generators (5–50 MW).
Hydro & Thermal Power: Small‑to‑medium hydroelectric and thermal units for grid or isolated operation.
Captive Power & Gensets: Critical infrastructure and remote site gensets requiring stable voltage and reactive power control.
Retrofit Projects: Direct replacement for legacy ABB UNITROL 500/1000 series AVRs, offering modern digital features with minimal panel modification.
Compatibility & Compliance
Fully compatible with ABB UNITROL 1010 series rectifiers, power supplies, and accessories. Interfaces with standard CT/PT signals and third‑party PLC/SCADA via Modbus. Complies with IEC 61000‑6‑2/4 (EMC), IEEE 421.5, and global grid codes for safety and performance.
Advantages
Compact & Cost‑Effective: All‑in‑one design saves panel space and reduces system cost for small‑to‑medium generators.
Proven Reliability: Rugged components and conformal coating ensure long‑term operation in harsh industrial environments.
Fast & Precise Control: High accuracy and rapid response enhance power quality and grid stability.
Easy Integration: Standard I/O and communication protocols simplify connection to new or existing control systems.
Global Support: Backed by ABB’s worldwide service network, including technical support and genuine spare parts。
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