Basler SR8A-2B15B3A Voltage Regulator – High-Performance AVR for Brushless Generators
The Basler SR8A-2B15B3A is a static voltage regulator specifically configured for brushless synchronous generators. The "Rev 6" designation indicates the latest hardware revision with enhanced reliability and updated component specifications. It provides stable excitation control over a wide load range, ensuring consistent output voltage quality.
Technical Highlights
This regulator uses a true RMS sensing circuit for accurate voltage measurement even with distorted waveforms. Its control loop incorporates adaptive gain that adjusts automatically to generator characteristics, reducing the need for manual tuning. The output stage uses high-power MOSFETs for efficient field current control with low heat dissipation.
Specifications
Sensing Input: 110–240 VAC, 50/60 Hz (universal)
Output Current: 8 A continuous, 15 A forcing for 10 seconds
Voltage Regulation: ±0.5%
Droop Adjustment: 0–10% for parallel operation
Under-frequency protection with adjustable roll-off slope
Operating Temperature: -40°C to +70°C
Dimensions: 200 x 160 x 85 mm
Advanced Features
Built-in EMI filter for noise immunity
Remote voltage trim input (0–10 V or 4–20 mA)
External droop CT input
Diagnostic LED for status and fault codes
Loss-of-sensing detection with automatic transfer to manual
Field over-current and over-voltage protection
Installation and Wiring
The SR8A-2B15B3A is designed for panel mounting with a standard cutout. Terminal blocks accept wires up to 10 AWG. The manual provides detailed connection diagrams for both three-phase and single-phase sensing configurations. Revision 6 includes improved terminal labeling and a larger wiring space for easier installation.
Tuning and Commissioning
Initial setup involves setting the voltage setpoint, stability, and droop potentiometers. A built-in test mode allows simulation of load changes to verify transient response. The regulator also includes a soft-start feature that gradually builds up voltage during generator start-up.
Applications
This AVR is ideal for diesel and gas generator sets in industrial, marine, and prime power applications. Its robust design withstands high vibration and temperature extremes.
Maintenance
Routine maintenance is minimal. Periodic inspection of connections and heat sink cleanliness is recommended. The regulator is fully encapsulated for protection against moisture and dust.
Compliance
Meets CE, UL, and CSA requirements, and is designed per IEC 61000-4 for EMC.
Conclusion
The Basler SR8A-2B15B3A Revision 6 offers a reliable, flexible, and high-performance solution for brushless generator excitation, backed by Basler's long-standing reputation.
