BASLER DECS-250-CN2SN1N Digital Excitation Control System

Product Description

The BASLER DECS‑250‑CN2SN1N is a fully digital excitation control system designed for precise regulation of voltage and field current in synchronous generators and motors. It ensures stable generator performance under varying load conditions while supporting both industrial and marine applications. Moreover, its compact design integrates voltage regulation, protection, and monitoring, reducing the need for external devices. Configurable parameters and a user-friendly interface enable quick setup, operation, and maintenance. In addition, the module supports advanced power factor and VAR control, making it adaptable to diverse power generation requirements.

Key Benefits

• Precise Digital Excitation Control → Guarantees generator stability and optimal performance.

• Integrated Protection Functions → Protects equipment from over/under voltage, reverse power, and field short circuits.

• Flexible Operation Modes → Supports AVR, VAR, and power factor regulation for industrial and marine generators.

• Compact and Reliable Design → Combines control, protection, and monitoring in a single module.

• Grid Code Compliance → Optional Power System Stabilizer ensures adherence to utility regulations.

Technical Specifications

• Manufacturer: Basler Electric

• Model: DECS‑250‑CN2SN1N

• Series: DECS‑250 Digital Excitation Control System

• Functions: AVR, Field Current Regulation, Field Voltage Regulation, Power Factor/VAR control

• Sensing: True RMS, single‑phase or three‑phase voltage and current

• Integrated Protection: Over/under voltage (27/59), over/under frequency (81O/U), reverse power (32R), reactive power (40Q), loss of PMG, field short circuit, sync check (25)

• Communication: USB Type B, RS‑232, RS‑485 (Modbus RTU), CAN Bus, Ethernet (Modbus TCP)

• Control Power: 90–150 Vdc, 82–132 Vac

• AC Operating Power: 240 Vac nominal

• Full Load Continuous DC Output Current: 15 Adc (up to +60°C)

• 10‑Second Forcing Current: 30 Adc typical

• AC Output Voltage (Full Load): Typically 125 Vdc

• Generator/Bus Voltage Sensing: 1‑phase or 3‑phase

• Voltage Sensing Ranges: 100/120 Vac, 200/240 Vac, 400/480 Vac, 600 Vac (selectable)

• Generator Current Sensing: 1‑phase or 3‑phase; 1 Aac or 5 Aac nominal

• Frequency Range: 50/60 Hz nominal

• Contact Inputs: 16 programmable dry contacts

• Output Contacts: 11 programmable Form A, 1 watchdog Form C

• Operating Temperature: -40°C to +60°C (-40°F to +140°F)

• Dimensions: 159 × 305 × 219 mm

• Weight: 8.0 lb

Typical Applications

The DECS‑250‑CN2SN1N is commonly used in power plants, marine generator systems, and redundant excitation control architectures. For instance, it ensures reliable voltage regulation for industrial synchronous generators while providing protection and monitoring. Its modular design allows integration into both standalone and grid‑connected power systems.

FAQ

Q: Can this module operate in marine environments?
A: Yes, the DECS‑250‑CN2SN1N supports marine synchronous generators and meets strict reliability requirements.

Q: Does it require external protective relays?
A: No, it integrates multiple protection functions including over/under voltage, over/under frequency, and reverse power.

Q: What communication protocols are supported?
A: USB, RS‑232, RS‑485 (Modbus RTU), CAN Bus, and Ethernet (Modbus TCP) are supported for flexible integration.

Q: Can it handle both 50 Hz and 60 Hz generators?
A: Yes, it operates reliably across a 50/60 Hz nominal frequency range.

Q: Is a Power System Stabilizer included?
A: The PSS is optional for grid compliance and can be configured per application requirements.