Basler KR4F Voltage Regulator

The Basler KR4F is a static voltage regulator designed for synchronous generators operating at voltages up to 600 VAC, 50/60 Hz. Identified by part number 9042600100, this regulator provides precise excitation control to maintain stable generator terminal voltage under varying load conditions. It is engineered for reliability in industrial, utility, and marine power generation applications.

Key Features

The KR4F features adjustable voltage setpoint, stability compensation, and droop control for parallel operation. It includes over‑excitation and under‑excitation protection. The unit is housed in a rugged enclosure suitable for panel mounting in demanding environments. Status LEDs indicate power and fault conditions.

Technical Specifications

Sensing voltage: up to 600 VAC, 50/60 Hz. Auxiliary power: 120‑240 VAC. Output: up to 150 VDC for exciter field. Continuous current: 5 A, peak 10 A. Regulation accuracy: ±0.5%. Response time:<30 ms. Operating temperature: -20°C to +65°C. Enclosure: IP20.

Operating Principles

The regulator compares sensed generator voltage with a reference. The error signal controls the firing angle of the SCR bridge, modulating the exciter field current. The PID control loop ensures stable performance. Droop compensation enables reactive power sharing in parallel systems.

Applications

Used in standby and prime power generators, marine vessels, and co‑generation plants with high voltage systems.

Installation and Configuration

Mount the unit on a panel. Connect sensing, power, and field wiring. Adjust voltage setpoint, stability, and droop using potentiometers. A load test is recommended for commissioning.

Maintenance and Reliability

Solid‑state design ensures high reliability. Routine inspection of connections and cleaning is sufficient.

Conclusion

The Basler KR4F voltage regulator delivers precise and dependable excitation control for high‑voltage generator applications, ensuring stable power quality.