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- UNS 0121 A-Z,V1 3BHE035301R0004
- Automatic Voltage Regulator
- Sweden (SE)
- 302 x 170 x 85 mm
- 2.8 kg
- Xiamen, China
- New & In Stock
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Product Overview
Stable voltage regulation is essential for ensuring reliable operation of generators, excitation systems, and industrial power equipment. The ABB UNS 0121 A-Z,V1 (3BHE035301R0004) Automatic Voltage Regulator is an advanced control component designed for automatic voltage adjustment and excitation control applications in industrial power systems.
The AVR module continuously monitors generator voltage conditions and adjusts the excitation system output to maintain a stable voltage level. By providing accurate regulation and fast response, it helps improve generator performance, power quality, and system reliability.
The UNS 0121 A-Z,V1 is commonly used in ABB excitation and power control systems where precise voltage management, stable operation, and high availability are required. Its industrial-grade design allows it to operate reliably in demanding environments such as power plants, energy facilities, and heavy industrial installations.
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | ABB |
| Model | UNS 0121 A-Z,V1 |
| Part Number | 3BHE035301R0004 |
| Product Type | Automatic Voltage Regulator |
| Function | Generator Voltage Regulation and Excitation Control |
| Application Category | Power Control and Excitation System |
| Control Function | Automatic Voltage Adjustment |
| Installation Type | Control Cabinet / Excitation System Installation |
| Signal Processing | Voltage Measurement and Regulation Control |
| Dimensions | 302 × 170 × 85 mm |
| Weight | 2.8 kg |
| Operating Environment | Industrial Power System Environment |
| Application | Generator Excitation and Voltage Control Systems |
Function and Working Principle
The ABB UNS 0121 A-Z,V1 Automatic Voltage Regulator operates by monitoring the generator output voltage and controlling the excitation current to maintain the required voltage level.
Its working process includes:
- Measuring generator output voltage
- Comparing actual voltage with the preset reference value
- Calculating voltage deviation
- Sending control signals to the excitation system
- Adjusting excitation current automatically
When the generator load changes, the AVR quickly responds by increasing or decreasing excitation output. This closed-loop control process helps maintain stable generator voltage under different operating conditions.
The regulator provides:
- Accurate voltage control
- Fast dynamic response
- Improved generator stability
- Reduced voltage fluctuations
- Enhanced power system reliability
Role in Industrial Control Systems
The ABB UNS 0121 A-Z,V1 plays a critical role in industrial power generation and excitation control systems.
It is commonly integrated with:
- Generator excitation systems
- Synchronous generators
- Excitation power units
- Power control cabinets
- Industrial automation controllers
- Monitoring and protection systems
Within a power system, the AVR acts as the main voltage control unit, ensuring that generators maintain stable output voltage during:
- Load changes
- Startup conditions
- Parallel operation
- Grid disturbances
- Dynamic power variations
Reliable voltage regulation helps protect electrical equipment and improves overall system efficiency.
Industrial Applications
The ABB UNS 0121 A-Z,V1 Automatic Voltage Regulator is widely used in industrial power applications.
| Industry | Application |
|---|---|
| Power Generation | Generator excitation control |
| Hydropower Plants | Turbine generator voltage regulation |
| Thermal Power Plants | Excitation system control |
| Oil & Gas | Industrial generator systems |
| Marine | Shipboard power generation |
| Mining | Heavy industrial power supply |
| Manufacturing | Backup generator systems |
| Energy Facilities | Power stability management |
Its reliable control capability makes it suitable for continuous-duty applications requiring stable electrical output.
Installation and System Integration
Proper installation is important to ensure accurate voltage regulation and long-term system reliability.
Recommended installation procedures include:
- Install the AVR module inside a suitable control cabinet.
- Verify correct power and signal wiring connections.
- Ensure voltage measurement inputs are correctly connected.
- Confirm communication and control interfaces before startup.
- Check parameter settings according to generator requirements.
- Perform commissioning tests after installation.
Correct configuration helps prevent:
- Voltage instability
- Excitation system errors
- Generator performance problems
- Unexpected shutdowns
Compatible System Components
The ABB UNS 0121 A-Z,V1 is commonly integrated with various ABB power and automation components.
| Component | Function |
|---|---|
| ABB Excitation Control Systems | Generator excitation regulation |
| ABB Power Converter Modules | Excitation power conversion |
| ABB Control Boards | System logic and monitoring |
| ABB Thyristor Modules | Excitation current control |
| ABB Protection Devices | Electrical system protection |
| ABB Communication Modules | Data exchange and monitoring |
| Generator Sensors | Voltage and current feedback |
| Human Machine Interface (HMI) | Operation and parameter monitoring |
Together, these components create a complete generator control and power management system.
Recommended Alternative Models
Depending on system requirements and equipment configuration, the following ABB components may also be considered.
| Model | Type | Key Feature | Application |
|---|---|---|---|
| UNS 0121 A-Z,V1 (3BHE035301R0004) | Automatic Voltage Regulator | Generator voltage control | Excitation systems |
| PCD230A | Excitation Controller Module | Advanced excitation control | Generator systems |
| UFC760BE143 | Control Module | Power regulation applications | Industrial control systems |
| 3BHE013707R0002 | Thyristor Module | High-power switching control | Excitation power units |
| ABB Excitation Control Modules | Control Components | Voltage and current regulation | Power generation systems |
Key Advantages
- Accurate automatic voltage regulation
- Fast response to load changes
- Improves generator stability
- Supports excitation system control
- Reliable industrial-grade construction
- Suitable for continuous operation
- Helps maintain power quality
- Easy integration into ABB power systems
Technical FAQs
What is the ABB UNS 0121 A-Z,V1 used for?
The ABB UNS 0121 A-Z,V1 is an automatic voltage regulator used to control generator voltage by adjusting the excitation system output.
Where is this AVR module commonly installed?
It is typically installed in generator excitation systems, power plants, industrial power control cabinets, and energy management systems.
Why is an automatic voltage regulator important?
An AVR maintains stable generator voltage, improves power quality, protects electrical equipment, and ensures reliable operation during load changes.
What components work together with the UNS 0121 A-Z,V1?
The module is commonly used with excitation power units, control boards, thyristor modules, generator sensors, and monitoring systems.
Conclusion
The ABB UNS 0121 A-Z,V1 (3BHE035301R0004) Automatic Voltage Regulator is a reliable excitation control component designed for industrial generator voltage regulation applications.
With its 302 × 170 × 85 mm dimensions and 2.8 kg weight, it provides accurate voltage control, stable excitation adjustment, and dependable operation in demanding power environments.
For power engineers, automation specialists, and system integrators, the ABB UNS 0121 A-Z,V1 (3BHE035301R0004) offers an effective solution for improving generator performance, maintaining voltage stability, and supporting long-term reliability of industrial power systems.