Basler DECS 125-15-B2C1 Digital Excitation Control System
The Basler DECS 125-15-B2C1 (firmware version 2.0.9) is a digital excitation control system designed for synchronous generators of medium to large capacity. This advanced controller provides automatic voltage regulation (AVR), power system stabilizer (PSS), and comprehensive protection functions, ensuring reliable and stable generator operation under all grid conditions. The B2C1 variant includes specific hardware and firmware enhancements for improved performance and connectivity.
The unit features a high‑speed processor with advanced control algorithms, a user‑friendly front panel with LCD and keypad, and multiple communication options. It supports both AC and DC power supplies, and offers flexible field output control. The DECS 125‑15‑B2C1 is suitable for new installations and retrofits in power plants, industrial facilities, and marine vessels.
Technical Specifications
Model: DECS 125-15-B2C1 (V.2.0.9)
Control modes: AVR, FCR, VAR, PF
Power supply: 125 V DC (80‑150 V DC) or 240 V AC
Field output: 15 A continuous (adjustable)
Voltage sensing: 3‑phase, 0‑600 V AC
Built‑in PSS: Yes, with configurable parameters
Limiters: Over‑excitation (OEL), under‑excitation (UEL), V/Hz, field overcurrent
Communication: Modbus RTU (RS‑485), Ethernet (optional)
Display: 2‑line LCD with backlight
Event recorder: 100 events
Operating temperature: -40°C to +70°C
Dimensions: 250 x 200 x 100 mm
Certifications: CE, UL, RoHS
Functional Enhancements (V.2.0.9)
Improved PSS tuning: Enhanced algorithms for damping inter‑area oscillations.
Expanded communication: Added support for DNP3 and IEC 61850 (optional).
Faster response: Reduced control loop latency for better transient performance.
Enhanced diagnostic logging: More detailed fault and event records.
Typical Applications
Utility and industrial generators: Up to 100 MW range.
Combined cycle plants: Coordinated control with gas and steam turbines.
Hydroelectric plants: Precision voltage control for grid compliance.
Marine power systems: Reliable excitation for shipboard generators.
Installation and Commissioning
Mount the unit in a panel or rack. Connect power, PTs, CTs, and field output. Commissioning involves setting generator parameters, tuning AVR and PSS using the built‑in oscilloscope, and verifying protection setpoints. The front panel provides a step‑by‑step wizard for initial setup.
Compliance
Complies with IEEE 421.5, IEC 60034‑16, CE and UL approved, RoHS compliant.
Conclusion
Basler DECS 125‑15‑B2C1 with firmware V.2.0.9 offers a robust, high‑performance excitation control solution with enhanced features for demanding generator applications.
