Basler Electric SR8A2B10B3AX Static Voltage Regulator

The Basler Electric SR8A2B10B3AX (part number 9060200126) is a high-performance static voltage regulator module designed for synchronous generators with brushless or DC exciters. It provides precise automatic voltage regulation with an accuracy of ±0.5% and a fast transient response of less than 40 ms. The regulator is suitable for generators operating at 120 VAC sensing input, offering flexible adjustment and comprehensive protection for industrial, marine, and utility power systems.

Control and Adjustment

The regulator features a proportional-integral-derivative (PID) control with adjustable gain and stability to match generator and exciter dynamics. Voltage setpoint is adjustable from 90% to 110% of nominal via a front-panel potentiometer. Droop control (0-5%) enables reactive load sharing in parallel operation. An under-frequency roll-off reduces excitation when frequency drops below a preset threshold to prevent over-excitation. A remote voltage trim input allows external control.

Excitation Output

Output voltage: 0-150 VDC, continuous current up to 10 A (peak 15 A). The output is short-circuit protected and current-limited. A field flashing circuit ensures initial excitation build-up. The regulator includes over-excitation protection and a soft-start function to avoid voltage overshoot. A field current monitor output is provided for external metering.

Protection and Diagnostics

Built-in protections include loss of sensing (shuts down excitation), over-voltage clamping, thermal shutdown, and reverse polarity protection. A fault relay output provides remote alarm. LED indicators show power, regulation status, and fault conditions. The regulator includes a self-test function for rapid diagnostics, accessible via a front-panel pushbutton.

Technical Specifications

Sensing input: 120 VAC ±10%, 50/60 Hz (other voltages configurable). Accuracy: ±0.5%. Response time:<40 ms. Operating temperature: –25°C to +65°C. Enclosure: IP20, panel-mount. Dimensions: 180 mm x 120 mm x 60 mm. Weight: approximately 2.5 kg. Complies with IEEE 421.5 and CE standards.

Applications

This regulator is used on diesel, gas, and hydro generators from 200 kVA to 2 MVA in standby, prime power, and parallel operation. It is ideal for data centers, hospitals, offshore platforms, and cogeneration plants where voltage stability is critical.

Installation and Commissioning

Mount the regulator in a clean, ventilated panel. Connect sensing leads to the generator output, field leads to the exciter, and auxiliary inputs as needed. Commissioning involves setting the voltage setpoint, stability, and droop while performing load tests. The regulator includes a test mode for excitation checkout without running the generator.

Reliability and Quality

Basler Electric’s SR8A2B10B3AX is built with industrial-grade components and conformal-coated circuit boards for moisture and dust resistance. It undergoes rigorous testing for vibration, temperature cycling, and surge immunity. The regulator has a MTBF exceeding 80,000 hours, ensuring long-term dependable operation.

Conclusion

The Basler Electric SR8A2B10B3AX static voltage regulator (9060200126) is a versatile, precise, and robust solution for generator voltage control. Its advanced features and proven reliability make it a preferred choice for power generation professionals.