Basler Electric SR8A-2B15B3A – Solid‑State Static Voltage Regulator

The Basler Electric SR8A-2B15B3A is a high‑performance static voltage regulator that provides precise, reliable excitation control for synchronous generators. Engineered with advanced solid‑state technology, this regulator ensures stable terminal voltage across varying load conditions, making it an ideal choice for industrial power generation, marine applications, and standby systems.

Regulation and Control Features

The SR8A series employs a fast‑response thyristor power stage with a precision voltage sensing circuit. The regulator continuously compares the generator output voltage against a user‑adjustable reference and modulates the field current to maintain the setpoint within ±0.5% accuracy. Built‑in droop compensation allows parallel operation of multiple generators without cross‑current circulation, while an adjustable stability control ensures optimal response for different machine sizes and inertia.

• Input voltage: 120/240 V AC, 50/60 Hz (sensing)

• Output field voltage: up to 150 V DC

• Output current: 15 A continuous (20 A surge)

• Regulation accuracy: ±0.5% of nominal voltage

• Voltage adjustment range: ±10% of rated value

• Droop compensation: adjustable 0–5% for paralleling

• Under‑frequency roll‑off: adjustable knee point

• Protections: over‑excitation limiting, loss of sensing, short circuit

• LED indicators: power, regulation, and fault status

• Operating temperature: –20 °C to +65 °C

Typical Applications

This regulator is suitable for generators ranging from 50 kVA to 1000 kVA, commonly found in industrial plants, hospitals, data centres, and marine vessels. The SR8A-2B15B3A can be used with both brushless and static excitation systems, providing reliable voltage support for motor starting, transformer energisation, and nonlinear loads.

Installation and Configuration

Mounting is via a standard panel cutout with front‑accessible controls. All connections are made through clearly labelled terminal blocks for AC sensing, field output, and auxiliary power. On‑board trimpots allow fine adjustment of voltage setpoint, stability, and droop without specialised tools. The regulator also supports remote voltage adjustment via an external potentiometer.

Reliability and Construction

Built with industrial‑grade components and conformal‑coated circuitry, the SR8A-2B15B3A withstands harsh environments including high humidity, vibration, and temperature extremes. It is fully tested for surge immunity and dielectric strength, complying with IEEE C37.90 and IEC 60255 standards. Basler Electric’s decades of experience in excitation control ensure long‑term dependability and minimal maintenance.

In summary, the Basler Electric SR8A-2B15B3A static voltage regulator delivers accurate, stable excitation control with flexible adjustment and robust protection, making it a trusted solution for generator voltage regulation.