ABB SPAU341 Voltage Regulator

• 1. Product Overview

  ABB SPAU341 Voltage Regulator is a high-performance automatic voltage regulator designed for generators, power plants, and distribution systems. It monitors and controls generator output voltage in real-time. By automatically adjusting excitation current, the SPAU341 ensures stable voltage output, improving generator reliability and efficiency.

  It employs advanced digital control technology, offering fast response, precise control, and strong interference immunity, suitable for industrial, energy, and utility applications.

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  2. Main Technical Data

  General

  • Product type:
    Automatic Voltage Regulator (AVR)

  • Input voltage range:
    85% to 110% of rated voltage

  • Output voltage accuracy:
    ±0.5% (typical)

  • Control method:
    Voltage closed-loop control, supports linear/non-linear excitation

  • Response time:
    Fast response, typically <100 ms

  Electrical Characteristics

  • Excitation current output:
    Suitable for synchronous generators

  • Overvoltage/undervoltage protection:
    Built-in protection logic

  • Stability:
    High dynamic stability to suppress voltage fluctuations

  Mechanical and Installation

  • Mounting:
    Control cabinet or panel

  • Housing:
    Industrial metal or flame-retardant plastic

  • Operating temperature:
    -20°C to +60°C

  • Vibration & shock:
    Compliant with industrial environment standards

  Communication and Functions

  • Optional communication interface:
    MODBUS or other industrial protocols (model dependent)

  • Status indication:
    LED or panel display for output voltage and operation status

  Standards and Certification

  • Compliance:
    IEC / EN 61000, IEC 60034, ISO 8528

  • Operating environment:
    Generator control, power plants, and distribution systems

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  3. Key Advantages and Features

  1. Precise and stable voltage control
     Automatically adjusts excitation current to maintain stable generator voltage.

  2. Fast response and dynamic stability
     Effectively suppresses voltage fluctuations, improving system reliability.

  3. Strong interference immunity
     Digital control technology ensures reliable operation in industrial environments.

  4. Comprehensive protection functions
     Built-in overvoltage, undervoltage, and excitation protection safeguard equipment.

  5. Modular design
     Easy installation, suitable for various control cabinets and panels.

  6. Multi-function communication interface
     Supports MODBUS or other industrial protocols for remote monitoring and management.

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  4. Typical Applications

  • Synchronous generator excitation control

  • Power plants and standby power systems

  • Industrial distribution voltage regulation

  • Wind and hydro generator control

  • Marine and mobile generator sets

  • Public infrastructure and energy management systems

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  5. Installation and Application Notes

  1. Verify rated voltage and excitation current
     Ensure the regulator matches generator parameters before installation.

  2. Correct wiring
     Follow manual instructions for power, excitation, and measurement circuits.

  3. Avoid extreme environmental conditions
     Protect against high temperature, humidity, and corrosive gases.

  4. Periodic inspection and maintenance
     Test output voltage, excitation function, and protection logic regularly.

  5. Follow electrical safety standards
     Adhere to safe installation and maintenance procedures.

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The structure and details of the product：

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