ABB UNITROL1020 UNS0119A-Z V1 (3BHE030579R0007) – In Stock Now | Competitive Price | High-Reliability Digital Excitation Controller from Professional Supplier
The ABB UNITROL1020 UNS0119A-Z V1 (3BHE030579R0007) is a compact and high-performance digital automatic voltage regulator (AVR) and excitation control system designed for small and medium-sized synchronous generators. As part of ABB’s well-known UNITROL 1000 series, it provides precise voltage regulation, stable excitation control, and reliable power system performance.
As a professional industrial automation supplier, we offer ABB UNITROL1020 units with stable inventory, fast global delivery, and competitive pricing, supporting power plants, industrial facilities, and EPC maintenance projects worldwide.
1. Product Overview – What Is ABB UNITROL1020?
The ABB UNITROL1020 is a microprocessor-based excitation control system designed to regulate generator output voltage by controlling the excitation current of synchronous machines.
It is widely used in:
Small and medium-sized power plants
Diesel and gas generator systems
Hydro and steam turbine units
Industrial synchronous motor applications
Marine and offshore power systems
According to industrial specifications, this model belongs to the UNITROL 1000 series, which is known for its stability, compact design, and advanced control capabilities.
Its main function is to maintain stable generator voltage through automatic voltage regulation (AVR) and field current regulation (FCR) methods, ensuring consistent and reliable power output under varying load conditions.
2. System Function – How It Works in Power Systems
The ABB UNITROL1020 operates as a closed-loop excitation controller, continuously monitoring generator output and adjusting excitation in real time.
Core working process:
Measures generator voltage and system parameters
Compares actual values with reference setpoints
Calculates required excitation adjustment
Controls excitation output to stabilize voltage
Continuously adapts to load changes
This process ensures that the generator maintains stable voltage even when load demand fluctuates significantly.
In grid-connected systems, it also helps improve:
Reactive power balance
Grid stability
Power quality consistency
3. Key Features and Technical Advantages
The ABB UNITROL1020 is designed for demanding industrial environments where reliability and precision are essential.
Main features include:
High-precision digital voltage regulation
Supports AVR, FCR, and power factor control modes
Built-in rotating diode monitoring for generator protection
Dual-channel operation support for load sharing
Automatic synchronization with power grid systems
Fast dynamic response to load variations
Integrated communication interfaces for remote monitoring
The system is also capable of supporting industrial communication protocols such as Modbus and Ethernet-based connectivity, enabling integration with SCADA and DCS systems.
4. Technical Specifications (Reference Overview)
Based on ABB technical documentation and industrial references, the UNITROL1020 UNS0119A-Z V1 typically includes:
Model: UNITROL1020 UNS0119A-Z V1
Part Number: 3BHE030579R0007
Type: Digital Automatic Voltage Regulator (AVR)
Series: ABB UNITROL 1000
Input Voltage: 100–240V AC (typical configuration)
Output Current: Up to 10A DC continuous, 20A peak
Operating Temperature: -40°C to +70°C
Communication: RS485 / Ethernet (Modbus supported)
Regulation Accuracy: ±0.25% steady-state performance
Protection Class: Industrial-grade IP-rated design
Response Time: ≤100 ms
These parameters make it suitable for continuous operation in harsh industrial environments.
5. Application Industries
The ABB UNITROL1020 is widely used across multiple industrial sectors where stable power generation is critical:
Power Generation
Gas turbine power plants
Diesel generator sets
Hydropower stations
Steam turbine systems
Industrial Energy Systems
Manufacturing plants
Petrochemical facilities
Mining operations
Steel production systems
Specialized Applications
Marine power systems
Offshore platforms
Emergency backup power systems
In all these environments, the UNITROL1020 ensures stable voltage output and safe generator operation, which is essential for preventing system instability or equipment damage.
6. Why Choose Us as Your Supplier
As a professional supplier of ABB industrial automation components, we focus on delivering reliable sourcing solutions for critical control system parts.
✔ Stable Stock Availability
We maintain ready inventory for fast delivery and urgent replacement needs.
✔ Competitive Pricing
We offer cost-effective procurement solutions for global customers.
✔ Quality Assurance
Each UNITROL1020 module is carefully tested before shipment to ensure stable performance.
✔ Global Shipping Support
We supply to power plants, EPC contractors, and industrial automation companies worldwide.
✔ Technical Support
We assist with model verification, system compatibility, and installation guidance.
