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- UNS 0121 A-Z,V1 3BHE035301R0410
- 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
The ABB UNS 0121 A-Z,V1 3BHE035301R0410 Automatic Voltage Regulator (AVR) is a high-performance digital voltage control device designed for generator excitation systems, synchronous machines, and industrial power automation applications.
As a key component in excitation control systems, the ABB UNS 0121 A-Z,V1 provides automatic voltage regulation, excitation adjustment, and stable generator control functions. It continuously monitors generator voltage conditions and automatically adjusts excitation output to maintain stable voltage performance during different operating conditions.
The automatic voltage regulator is designed for industrial applications requiring accurate voltage control, fast response, high reliability, and continuous operation. It helps improve generator stability, optimize electrical performance, and maintain reliable power system operation.
With dimensions of 302 × 170 × 85 mm and a weight of 2.8 kg, the ABB UNS 0121 A-Z,V1 3BHE035301R0410 features a compact industrial structure suitable for installation in excitation cabinets, generator control panels, and electrical automation systems.
Typical applications include:
- Synchronous generator excitation systems
- Automatic voltage regulation systems
- Industrial power generation equipment
- Electrical automation systems
- Generator control panels
- Power management systems
- Industrial energy control applications
Technical Specifications
| Parameter | Details |
|---|---|
| Manufacturer | ABB |
| Model | UNS 0121 A-Z,V1 |
| Part Number | 3BHE035301R0410 |
| Product Type | Automatic Voltage Regulator |
| Function | Automatic Voltage Regulation and Excitation Control |
| Dimensions | 302 × 170 × 85 mm |
| Weight | 2.8 kg |
| Installation Method | Cabinet Mounting |
| Application Area | Generator and Power Control Systems |
Function and Working Principle
The ABB UNS 0121 A-Z,V1 Automatic Voltage Regulator operates through a closed-loop control process to maintain stable generator voltage.
The working principle includes:
- The AVR receives voltage and current feedback signals from the generator system.
- Internal control circuits process electrical measurement data.
- The actual generator voltage is compared with the preset reference value.
- The regulator calculates the required excitation adjustment.
- Control signals are transmitted to the excitation system.
- Generator terminal voltage is maintained within the required operating range.
Through continuous monitoring and automatic correction, the UNS 0121 A-Z,V1 improves voltage stability and ensures reliable operation of synchronous generators and industrial power systems.
Main Features
1. High-Precision Automatic Voltage Regulation
The ABB UNS 0121 A-Z,V1 provides accurate voltage control for industrial generator applications.
Main functions include:
- Generator voltage measurement
- Voltage feedback processing
- Automatic voltage adjustment
- Excitation output control
- Voltage stabilization
The precise regulation capability helps reduce voltage fluctuations and improves power quality.
2. Advanced Excitation Control Capability
The voltage regulator provides reliable excitation management for synchronous machines.
Key advantages:
- Fast response to load changes
- Stable excitation adjustment
- Improved generator performance
- Enhanced power system stability
- Reliable voltage control
The device is suitable for applications where continuous and accurate excitation control is required.
3. Reliable Industrial Performance
The ABB UNS 0121 A-Z,V1 is designed for demanding industrial environments.
Performance advantages:
- Stable digital control operation
- Reliable signal processing
- Strong industrial adaptability
- Long operational service life
- Reduced maintenance requirements
Its industrial-grade design supports reliable operation in critical power systems.
4. Compact Structure and Easy Integration
The compact design allows efficient installation in industrial control cabinets.
Installation advantages:
- Space-saving structure
- Flexible system integration
- Convenient wiring arrangement
- Easy maintenance access
The optimized design helps reduce installation complexity.
5. Flexible Control Functions
The automatic voltage regulator supports various generator control requirements.
Typical functions include:
- Automatic voltage control
- Excitation regulation
- Reactive power control
- Power factor adjustment
- Field current regulation
Industrial Applications
Generator Excitation Systems
The ABB UNS 0121 A-Z,V1 is widely used in generator excitation control systems.
Typical applications:
- Generator voltage stabilization
- Excitation current adjustment
- Generator output control
- Power system stability improvement
Power Generation Equipment
Reliable voltage regulation is essential for modern power generation systems.
Applications include:
- Industrial generators
- Energy production units
- Power generation facilities
- Backup power systems
Industrial Automation Systems
The AVR can be integrated into industrial electrical automation systems.
Typical applications:
- Control cabinets
- Electrical automation equipment
- Power monitoring systems
- Industrial energy management systems
Heavy Industrial Equipment
Large industrial equipment requires stable electrical control performance.
Applications include:
- Manufacturing facilities
- Large motor systems
- Industrial production lines
- Energy-intensive machinery
Installation Guide
Mechanical Installation
Recommended installation steps:
- Verify the ABB UNS 0121 A-Z,V1 3BHE035301R0410 model before installation.
- Inspect the regulator housing and connectors.
- Install the unit in the designated control cabinet.
- Secure mounting points properly.
- Ensure sufficient ventilation around the equipment.
Proper installation improves reliability and prevents overheating.
Electrical Connection
Before operation, check:
- Power supply connections
- Voltage sensing terminals
- Excitation output wiring
- Control signal cables
- Grounding connections
Recommended practices:
- Disconnect power before installation.
- Verify wiring connections carefully.
- Avoid incorrect terminal connections.
- Ensure all connectors are securely fixed.
Commissioning Procedure
Recommended commissioning steps:
- Confirm mechanical installation.
- Check electrical connections.
- Verify feedback signals.
- Configure control parameters.
- Start the excitation system.
- Monitor voltage regulation performance.
Correct commissioning ensures stable AVR operation.
Common Fault Symptoms and Troubleshooting
| Fault Symptom | Possible Cause | Recommended Solution |
|---|---|---|
| Generator voltage unstable | Incorrect regulation parameters | Check control settings |
| No voltage output | Excitation circuit fault | Inspect excitation wiring |
| Voltage fluctuation | Feedback signal problem | Check sensing connections |
| AVR cannot start | Power supply failure | Verify input voltage |
| Overvoltage alarm | Incorrect parameter configuration | Adjust AVR settings |
| Slow response during load changes | Control tuning issue | Review regulation parameters |
Maintenance Recommendations
To maintain reliable operation:
- Inspect electrical connections regularly
- Keep control cabinets clean
- Prevent dust and moisture accumulation
- Check ventilation conditions
- Monitor operating parameters
- Inspect terminals periodically
- Maintain proper installation environment
Regular maintenance reduces unexpected failures and extends equipment service life.
Advantages of ABB UNS 0121 A-Z,V1 3BHE035301R0410
- High-precision automatic voltage regulation
- Reliable excitation system control
- Stable digital control performance
- Fast response capability
- Compact cabinet installation design
- Suitable for synchronous generators
- Strong system integration capability
- Long-term industrial reliability
Technical FAQs
What is ABB UNS 0121 A-Z,V1 3BHE035301R0410?
The ABB UNS 0121 A-Z,V1 3BHE035301R0410 Automatic Voltage Regulator is an industrial AVR device designed for generator voltage regulation and excitation control.
What is the main function of ABB UNS 0121 A-Z,V1?
Its main function is to automatically regulate generator voltage by controlling excitation output and maintaining stable electrical performance.
Where is ABB UNS 0121 A-Z,V1 used?
It is commonly used in generator systems, power generation equipment, industrial automation systems, and electrical control applications.
What are the dimensions of ABB UNS 0121 A-Z,V1?
The automatic voltage regulator dimensions are 302 × 170 × 85 mm, with a weight of 2.8 kg.
Conclusion
The ABB UNS 0121 A-Z,V1 3BHE035301R0410 Automatic Voltage Regulator is a reliable industrial excitation control device designed for accurate voltage regulation and stable generator operation.
With advanced control capability, compact structure, and dependable industrial performance, the UNS 0121 A-Z,V1 provides an effective solution for power generation systems, electrical automation applications, and industrial energy control environments.
Its reliable voltage regulation performance makes it suitable for systems requiring precise control, continuous operation, and long-term industrial reliability.