Basler DECS-100-B15 Digital AVR (A15/B11/A11) – Fully Configurable Excitation

The Basler DECS-100-B15 with option codes A15, B11, and A11 is a highly flexible digital automatic voltage regulator. The DECS-100 platform is known for its modularity, and this specific configuration includes enhanced analog I/O (A15), expanded digital inputs (B11), and additional protection functions (A11). It is designed for generators of all sizes, from industrial to utility scale.

Digital Control Core

At the heart of the DECS-100 is a dual-processor system that separates control and communication tasks, ensuring deterministic response times. The regulator uses 16-bit ADCs for high-resolution voltage and current sampling, achieving accuracy better than 0.2%.

Options Explained

• A15: Adds two additional analog inputs for remote setpoint or power factor control.

• B11: Provides eight digital inputs and four relay outputs for external logic integration.

• A11: Includes advanced protection such as loss-of-field, reverse power, and overexcitation limit.

Performance Specifications

• Field Output: 15 A continuous, 30 A forcing (for 10 seconds)

• Voltage Regulation: ±0.25%

• Response Time: < 8 ms for 90% recovery

• Frequency Range: 30–70 Hz (nominal 50/60)

• Communication: Modbus RTU, optional Profibus or Ethernet

Protection and Limiting

The regulator includes comprehensive protection: over-excitation limit (OEL), under-excitation limit (UEL), stator current limit, and voltage-dependent reactive current limit. It also features a power system stabilizer (PSS) to dampen electromechanical oscillations.

Setup and Configuration

Configuration is done via a front-panel HMI with a keypad and LCD, or via PC software. Users can create custom logic equations to tailor protection and control sequences.

Installation

Designed for 19-inch rack or flush mounting, with rear-terminal connections. Auxiliary supply: 24–250 VDC or 100–240 VAC.

Applications

Suitable for power plants, cogeneration, marine, and critical standby systems where grid code compliance is required.

Maintenance and Diagnostics

Self-diagnostics and event logging facilitate troubleshooting. Firmware updates are field-upgradable via communication port.

Conclusion

The Basler DECS-100-B15 with A15/B11/A11 options delivers unparalleled flexibility and performance for demanding generator excitation applications.