Basler DECS100-B15 Digital Automatic Voltage Regulator

The Basler DECS100-B15 is a compact digital automatic voltage regulator (AVR) designed for synchronous generators in industrial, marine, and commercial power applications. This regulator provides precise excitation control to maintain stable generator output voltage under varying load conditions, ensuring reliable power quality for sensitive equipment. The DECS100-B15 is part of Basler's trusted DECS series, known for robust performance and advanced protection features.

The regulator features a microcontroller‑based design with high‑speed processing and advanced PID control algorithms, delivering fast transient response and excellent steady‑state accuracy. It includes comprehensive protection functions such as over‑excitation limiting, under‑excitation limiting, V/Hz protection, and loss‑of‑sensing detection. The DECS100-B15 offers a user‑friendly interface with LED indicators for status monitoring and potentiometers for adjustable settings.

Technical Specifications

• Model: DECS100-B15

• Control mode: AVR (automatic voltage regulation)

• Voltage sensing: 3‑phase, 0‑600 V AC (PT or direct connection)

• Field output: Up to 15 A continuous (adjustable)

• Regulation accuracy: ±0.5% of setpoint

• Protection: Over‑excitation, under‑excitation, V/Hz, loss of sensing

• Adjustments: Voltage setpoint, gain, stability, droop

• Power supply: 56‑277 V AC or 125 V DC

• LED indicators: Power, excitation ON, fault

• Operating temperature: -40°C to +70°C

• Dimensions: 150 x 120 x 60 mm

• Certifications: CE, UL, RoHS

Functional Capabilities

• Precise voltage regulation: Maintains generator terminal voltage within ±0.5% of setpoint.

• Over‑excitation limiter (OEL): Prevents rotor overheating.

• Under‑excitation limiter (UEL): Prevents loss of synchronism.

• V/Hz protection: Protects against overfluxing.

• Soft start: Controlled voltage build‑up during startup.

• Droop compensation: Adjustable reactive power droop for parallel operation.

Typical Applications

• Diesel and gas gensets: Voltage regulation for standby and prime power.

• Marine generators: Shipboard power systems.

• Hydroelectric turbines: Excitation control for small to medium hydro plants.

• Industrial cogeneration: Voltage and reactive power control.

Installation and Configuration

Mount the DECS100-B15 on a panel using the provided brackets. Connect the 3‑phase voltage sensing inputs, field output, and power supply. Commissioning involves setting the generator rated parameters, adjusting the AVR gain and stability controls, and verifying protection functions.

Compliance and Environmental

Complies with IEEE 421.5, IEC 60034‑16, CE and UL marks, RoHS compliant.

Conclusion

The Basler DECS100-B15 delivers precise excitation control and advanced protection for a wide range of generator applications.