DECS-250-CN2SN1N | BASLER | Digital Excitation Control System

Product Description

The DECS‑250‑CN2SN1N from Basler Electric is a fully digital excitation control system designed for synchronous generators and motors. It delivers precise voltage regulation, reactive power control, and integrated generator protection in a compact and robust package suitable for power plants and industrial facilities.

Technical Overview

• Model: DECS‑250‑CN2SN1N
• Manufacturer: Basler Electric (USA)
• Type: Digital Excitation Control System (DECS)
• Application: Automatic voltage regulation, power factor management, and generator protection for synchronous machines

Control and Regulation Features

• Voltage Regulation Modes: Automatic Voltage Regulation (AVR), Field Voltage Regulation, Field Current Regulation
• Reactive Power Control: VAR mode and Power Factor (PF) mode
• True RMS voltage and current sensing, supporting single‑phase or three‑phase inputs
• Optional Power System Stabilizer (PSS) for improved grid compliance and dynamic stability

Protection Functions

• Undervoltage (27) and Overvoltage (59)
• Under/Overfrequency (81U/O)
• Reverse Power (32R)
• Loss of Permanent Magnet Generator (PMG)
• Field Short Circuit Protection
• Synchronization Check (25)
• Eliminates the need for separate protective relays

Communication and Connectivity

• Ethernet for remote monitoring and load sharing
• Modbus RTU over RS‑232/RS‑485
• Supports load sharing between multiple generators over Ethernet networks

Mechanical and Environmental

• Compact form factor, easy integration into existing generator panels
• Weight: 3.6 kg
• Operating Temperature: -20°C to +70°C

Applications

• Thermal, hydro, and renewable power plants requiring stable excitation and reactive power control
• Industrial generator sets for factories, hospitals, and critical facilities
• Grid-connected synchronous machines needing voltage, frequency, and VAR stability
• Safety-critical installations where integrated protection and redundancy are required

FAQ

Q: Can the DECS‑250‑CN2SN1N be used with multiple generator units for load sharing?
A: Yes, it supports Ethernet-based load sharing for synchronized operation of multiple generators.

Q: Does it include protection functions for field short circuits?
A: Yes, all key generator protection features, including field short circuit protection, are built into the controller.

Q: Is a Power System Stabilizer included?
A: A PSS is optional and can be installed for applications requiring enhanced grid code compliance.