ABB UNITROL1005-0011 is a high-precision automatic voltage regulator (AVR) belonging to ABB’s UNITROL1000 series, specifically engineered to maintain stable output voltage of synchronous generators in power generation systems. As a critical component ensuring generator performance and grid stability, ABB UNITROL1005-0011 integrates advanced PID control algorithms, real-time excitation adjustment, and comprehensive protection functions, enabling rapid response to voltage fluctuations caused by load changes or grid disturbances.
Designed for seamless integration with both new and legacy generator sets (ranging from small diesel generators to large industrial turbines), ABB UNITROL1005-0011 features a user-friendly HMI and modular design that simplifies configuration and maintenance. Its industrial-grade components and robust enclosure ensure reliable operation in harsh environments such as power plants, industrial facilities, and remote off-grid sites. Whether optimizing generator efficiency, enhancing grid compatibility, or ensuring safe operation, ABB UNITROL1005-0011 delivers consistent and precise voltage regulation, solidifying its role as a trusted solution for power generation applications.
Technical Specifications
Parameter Name | Parameter Value
Product Model | UNITROL1005-0011
Manufacturer | ABB
Product Type | UNITROL1000 Series Automatic Voltage Regulator
Input Voltage Range (Generator) | 100-240 VAC (Single-Phase)
Excitation Output Current | Up to 20 A (Continuous), 60 A (Peak, 10s)
Excitation Output Voltage | 0-300 VDC
Voltage Regulation Accuracy | ±0.2% of Rated Voltage
Response Time | ≤ 10 ms (to 90% of Adjustment)
Communication Protocols | Modbus RTU, IEC 61850, Profibus DP
Operating Temperature Range | -20°C to 60°C
Relative Humidity | 5% – 95% (Non-Condensing)
Physical Dimensions (W×H×D) | 210mm × 320mm × 180mm
Installation Type | Panel Mount / DIN Rail Mount
Protection Rating | IP20 (Panel Mounted)
Weight | Approximately 4.5 kg
Main Features and Advantages
Ultra-precise voltage regulation: ABB UNITROL1005-0011 achieves a voltage regulation accuracy of ±0.2% through its advanced digital control core, which continuously samples generator terminal voltage and adjusts excitation current in real-time. This level of precision ensures the generator output meets strict grid standards, reducing voltage deviations that could damage sensitive electrical equipment or disrupt power supply.
Rapid dynamic response: With a response time of ≤10 ms, ABB UNITROL1005-0011 quickly compensates for voltage fluctuations caused by sudden load changes (such as motor startup or industrial equipment shutdown). The 3x peak excitation current (60 A) provides sufficient magnetic field strength to stabilize voltage rapidly, preventing generator tripping and ensuring uninterrupted power supply.
Comprehensive protection and compatibility: ABB UNITROL1005-0011 integrates multiple protection functions, including overcurrent, overvoltage, undervoltage, and overtemperature protection, safeguarding both the AVR and generator. It supports mainstream industrial communication protocols, enabling seamless integration with SCADA systems and generator control panels for centralized monitoring and remote operation, reducing on-site maintenance workload.
Application Fields
In industrial power plants (such as thermal, hydro, and gas-fired plants), ABB UNITROL1005-0011 serves as the core excitation control component for synchronous generators, ensuring stable voltage output even during load variations. It works with the plant’s DCS system to adjust excitation parameters based on grid demand, optimizing generator efficiency and reducing fuel consumption, which is crucial for large-scale industrial power supply.
The renewable energy sector relies on ABB UNITROL1005-0011 for voltage regulation in wind and solar hybrid power systems. It compensates for the intermittent nature of renewable energy sources by adjusting generator excitation, ensuring the hybrid system output is compatible with the grid and reducing power quality issues such as voltage flicker. This makes it an essential component for grid-connected renewable energy projects.
In remote off-grid applications (such as mining sites, oil fields, and rural areas), ABB UNITROL1005-0011 maintains stable voltage for standalone generator sets, powering critical equipment like drilling machines, lighting systems, and communication devices. Its rugged design withstands extreme temperatures and harsh environmental conditions, while its user-friendly configuration interface allows on-site personnel to set parameters easily without specialized training.
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Installation and Maintenance
Installation preparation: Before installing ABB UNITROL1005-0011, confirm the installation location has good ventilation and is free from direct sunlight or water splashes. Verify the generator’s rated voltage and excitation requirements match the AVR’s specifications, and ensure the input power supply is stable. Prepare shielded cables for generator voltage sampling and excitation output connections to minimize electromagnetic interference, and use torque wrenches to fasten terminals to the specified torque (2.5 N·m).
Maintenance recommendations: Conduct monthly visual inspections of ABB UNITROL1005-0011 to check for loose terminals, dust accumulation, or abnormal indicator lights. Use a multimeter quarterly to test input voltage and excitation output stability. Clean the AVR’s ventilation slots annually with compressed air, and calibrate the voltage regulation function semi-annually using ABB’s dedicated calibration tool. Regularly back up configuration parameters and update firmware via ABB’s ServicePort software to enhance performance and security.
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