Basler Electric - DECS-200-1C – Digital Excitation Control System

The Basler Electric DECS-200-1C is a microprocessor-based digital excitation control system designed to regulate the output voltage, reactive power (VARs), or power factor of synchronous generators by controlling the DC excitation applied to the generator’s exciter field. This versatile unit is suitable for a wide range of generator sizes and applications, offering precise control and comprehensive protection features. 

🔧 Key Features

• Flexible Output Voltage Options: Supports 32 VDC, 63 VDC, or 125 VDC outputs at 15 ADC, accommodating various excitation requirements. 

• High Regulation Accuracy: Achieves ±0.25% voltage regulation accuracy over the load range at rated power factor and constant generator frequency. 

• Multiple Operating Modes: Includes Automatic Voltage Regulation (AVR), Field Current Regulation (FCR), VAR, and Power Factor (PF) control modes. 

• Advanced Protection Functions: Features overvoltage, undervoltage, overcurrent, loss of sensing, and exciter diode monitoring protections. 

• Comprehensive Monitoring: Provides sequence of events recording (up to 127 events) and oscillography (up to 8 records) for detailed analysis. 

• Communication Interfaces: Equipped with RS-232 and RS-485 ports, supporting Modbus™ protocol for remote monitoring and control. 

• User-Friendly Interface: Front panel includes a backlit LCD display, navigation buttons, and LEDs for easy operation and status indication. 

⚙️ Technical Specifications

• Control Power Input:

  • 16–60 VDC (30 W) 

  • 85–132 VAC, 50/60 Hz (50 VA) 

  • 90–150 VDC (30 W) 

• Operating Power Input:

  • 32 VDC Output: 60 VAC (56–70 VAC ±10%), 780 VA 

  • 63 VDC Output: 120 VAC (100–139 VAC ±10%), 1,570 VA 

  • 125 VDC Output: 240 VAC (190–277 VAC ±10%), 3,070 VA

• Voltage Sensing Input: Single-phase or three-phase line voltage, with nominal ranges of 100 V, 200 V, 400 V, and 500 V at 50/60 Hz 

• Current Sensing Input: 1 A or 5 A AC, 50/60 Hz 

• Analog Setpoint Inputs: ±10 VDC or 4–20 mA 

• Contact Inputs: 11 contact inputs, 24 VDC

• Communication Ports:

  • COM0: RS-232 (front panel) 

  • COM1: RS-232 (side panel)

  • COM2: RS-485 (side panel), Modbus™ protocol 

• Operating Temperature: -40 °C to +60 °C

• Dimensions: Approximately 205 mm (W) × 171 mm (D) × 304 mm (H)

• Weight: Approximately 6.35 kg

📘 Applications

The DECS-200-1C is ideal for applications requiring precise excitation control, such as:

• Power Generation Plants: Ensuring stable voltage and reactive power control for synchronous generators. 

• Industrial Facilities: Maintaining power quality and reliability in manufacturing and processing plants.

• Marine and Offshore Systems: Providing dependable excitation control in challenging environments.