Description
The Basler Electric DECS 125-15 (Part Number: 9265300129) is a powerful, microprocessor-based Digital Excitation Control System. It is engineered to provide precise voltage regulation, excitation control, and system protection for synchronous generators. Designed for reliability and versatility, this unit ensures stable operation across a wide range of power generation applications, from primary power to emergency backup systems.

Technical Parameters
- Model: DECS 125-15
- Part Number: 9265300129
- Output Rating: 125 Vdc, 15 Adc
- Dimensions: 266.7 mm x 212.9 mm x 101.6 mm
- Weight: 3.4 kg
- Origin: USA
Application Areas
- Synchronous generator excitation control
- Standby and prime power generation systems
- Industrial co-generation plants
- Marine and offshore power management
Product Usage Instructions
- Mounting: Mount the unit in a vertical position within a ventilated enclosure, ensuring adequate clearance for heat dissipation.
- Wiring: Connect the generator output, exciter field, and auxiliary power inputs according to the provided wiring diagram, using properly rated shielded cabling.
- Configuration: Access the Basler Electric interface via the communication port to set parameters including voltage setpoint, droop, and limiters.
- Commissioning: Perform a soft-start initial test; verify that all protective functions are enabled and that the output voltage tracks the setpoint accurately under no-load conditions.
Product Description
The DECS 125-15 serves as a comprehensive control solution, integrating advanced digital regulation with robust field-protection capabilities. It features flexible operating modes, including voltage regulation, reactive power (VAR) regulation, and power factor (PF) regulation, allowing it to adapt to varying grid requirements. Its digital architecture allows for high-precision control, reducing maintenance needs and improving the overall transient response of the generator system.
Protection & Environmental Parameters
- IP Rating: IP20 (intended for installation within a protective enclosure).
- Additional Protection: Features internal thermal protection, over-excitation limiting, and field-overvoltage protection.
- Temperature Range: Operating temperature from -40°C to +70°C; storage temperature from -40°C to +85°C.
- Humidity: Up to 95% relative humidity, non-condensing.
Mechanical & EMC Standards
- Mechanical Resistance: Tested to withstand high-vibration environments typical of engine-driven generator sets.
- Military Standard: Designed to comply with robust industrial environmental requirements.
- EMC Compliance: Designed for high immunity to electromagnetic and radio frequency interference in accordance with IEC and IEEE standards.
- Surge Protection: Integrated transient protection to safeguard against electrical spikes and surges.
Frequently Asked Questions
- How do I calibrate the voltage setpoint? This can be done digitally via the communication software or via an external analog input (4–20 mA or DC voltage).
- Can this unit be used for parallel operation? Yes, the DECS 125-15 supports reactive droop compensation for stable parallel operation with other generators.
- What does a solid “Fault” LED indicate? A fault LED indicates that the unit has detected an internal error or an out-of-limits condition; check the error log via the software interface for the specific fault code.
- Is the unit field-programmable? Yes, the software allows users to customize control modes and set protection thresholds to meet specific site requirements.

