Basler Electric SR8A2B01A3E Static Voltage Regulator

The Basler Electric SR8A2B01A3E is a static voltage regulator designed for synchronous generators in industrial, marine, and utility applications. It provides automatic voltage regulation with an accuracy of ±0.5% and a fast transient response of less than 50 ms. The regulator is suitable for brushless and DC exciter systems, offering flexible adjustment and comprehensive protection. Its robust construction ensures reliable operation in harsh environments.

Control and Adjustment

The regulator features a proportional‑integral (PI) control loop 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 the frequency drops below a preset threshold, preventing over‑excitation. A remote voltage trim input allows external control.

Excitation Output

Output voltage: 0‑150 VDC, with continuous current capacity up to 10 A (peak higher). The output is short‑circuit protected and current‑limited. 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.

Technical Specifications

Sensing input: 100‑480 VAC, 50/60 Hz, three‑phase or single‑phase. Accuracy: ±0.5%. Response time:<50 ms. Operating temperature: –25°C to +65°C. Enclosure: IP20, panel‑mount. 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, field output, and auxiliary inputs. 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 SR8A2B01A3E is built with industrial‑grade components and conformal‑coated circuit boards. It undergoes rigorous testing for vibration, temperature cycling, and surge immunity. The regulator has a MTBF exceeding 80,000 hours.

Conclusion

The Basler Electric SR8A2B01A3E static voltage regulator delivers reliable, accurate, and cost‑effective voltage control for a broad range of generator applications, making it a trusted choice for engineers and operators.