Basler SR4A2B01B3A Static Voltage Regulator

The Basler SR4A2B01B3A is a static voltage regulator belonging to the well‑known SR4A series. It is engineered for brushless synchronous generators requiring accurate and responsive voltage regulation. This model offers a comprehensive set of adjustments for voltage setpoint, stability, and reactive droop, making it a versatile choice for both isolated and parallel generator operations.

Key Features

The regulator includes adjustable voltage reference, stability compensation, and droop for reactive power sharing. It features over‑excitation protection, under‑excitation limiting, and a soft‑start function to prevent voltage overshoot. The front panel is equipped with status LEDs and test points for easy commissioning and diagnostics.

Technical Specifications

Sensing input voltage is 110 to 480 VAC at 50/60 Hz. Power supply input is 120 to 240 VAC. The output voltage range is up to 150 VDC for the exciter field, with a continuous current rating of 5 A and a peak of 10 A. Regulation accuracy is ±0.5%. Response time is less than 30 milliseconds. Operating temperature range is -40°C to +70°C. The unit is housed in a durable panel‑mount enclosure.

Operating Principles

The SR4A2B01B3A operates by comparing the sensed generator terminal voltage with a user‑adjustable reference. The resulting error signal drives a PID controller that modulates the excitation current delivered to the field winding. The droop function adjusts the voltage setpoint based on reactive current, ensuring stable reactive power sharing in parallel systems.

Applications

This regulator is used in standby generators, prime power systems, and marine installations. It is suitable for applications ranging from small industrial sets to larger utility‑type generators. The SR4A2B01B3A is often specified for its reliability and ease of configuration.

Installation and Configuration

Install the regulator on a panel in a clean, dry location. Connect the sensing and power inputs as well as the exciter field leads. Configure the voltage setpoint, stability, and droop using the trimpots. A systematic commissioning process, including a step‑load test, is recommended to optimize performance.

Maintenance and Reliability

The solid‑state design ensures high reliability with no wear‑prone parts. Routine maintenance consists of visual inspection and cleaning. The regulator includes built‑in protection circuits to safeguard against external faults.

Conclusion

The Basler SR4A2B01B3A static voltage regulator delivers consistent and precise voltage control, backed by Basler Electric's reputation for quality and durability in excitation systems.