Basler Electric SR4A‑2B01B3E Static Voltage Regulator

The Basler Electric SR4A‑2B01B3E is a state‑of‑the‑art static voltage regulator for synchronous generators, providing automatic voltage control with exceptional accuracy and dynamic performance. It is designed for brushless exciter systems and is capable of handling high field currents. The regulator is used in demanding applications such as utility power stations, industrial co‑generation, and large marine installations.

Control Algorithms

The regulator employs a digital PID control with adaptive gain to optimize response for different load conditions. It includes a built‑in power system stabilizer (PSS) to damp electromechanical oscillations. Voltage setpoint is adjustable from 90‑110% of nominal, with fine trim via external potentiometer. The regulator also supports reactive power control (Q‑control) for voltage‑ or var‑based regulation.

Excitation Output

Output voltage: 0‑150 VDC, current up to 10 A continuous, with short‑term overload capability. The output is fully protected against short circuits and overcurrent. A field flashing circuit is included for initial excitation build‑up. The regulator provides a stable and clean DC output with low ripple.

Protection and Diagnostics

Comprehensive protection includes loss of sensing, over‑excitation limit, under‑excitation limit, thermal overload, and frequency protection. The unit has a front‑panel LCD display showing voltage, current, and fault codes. It includes RS‑485 communication for remote monitoring and integration with plant DCS.

Technical Specifications

Sensing: 100‑480 VAC, 50/60 Hz. Accuracy: ±0.5%. Response:<30 ms. Operating temperature: –25°C to +65°C. Enclosure: IP20, panel‑mount. Compliance: IEEE 421.5, CE.

Applications

Ideal for generators from 500 kVA to 5 MVA in prime and standby roles, including diesel, gas, and hydro turbines. Used in data centers, hospitals, and offshore platforms where voltage stability is critical.

Installation and Commissioning

Mount in a dry, ventilated panel. Connect sensing, field, and auxiliary inputs. Commissioning involves setting parameters via the front panel or software, and performing step‑load tests to verify performance.

Reliability

Basler Electric’s rigorous testing ensures high reliability. The SR4A‑2B01B3E is built with premium components and designed for long‑term continuous operation.

Conclusion

The Basler Electric SR4A‑2B01B3E static voltage regulator combines advanced control, robust construction, and comprehensive protection, making it a superior choice for high‑performance generator voltage regulation.