Description
Basler Electric DECS-250-CN1CN1N
Technical Specifications:
- Sensing: 3-phase true RMS voltage and current sampling, maximum 600V AC direct input
- Voltage Regulation Accuracy: ±0.25%
- Control Power Input: 120/240VAC or 24/48/125VDC dual power supply
- Field Output: PWM power stage, continuous rated 20A DC
- Sampling Frequency: High speed multi-channel synchronous sampling
- Communication: RS232, RS485, multiple industrial protocol support
- Operating Temperature: -20℃ ~ +65℃
- Storage Temperature: -40℃ ~ +85℃
- Humidity: 5%~95% non-condensing
Function Features:
- Multiple control modes: AVR, field current regulation, VAR control, power factor control
- Full set of limiters: V/Hz limiter, overexcitation limiter, underexcitation limiter, stator current limiter
- Cross current droop and line drop compensation for multi-generator parallel operation
- Soft build-up, bumpless transfer between control modes
- High-resolution oscillography and sequence of event recording
- Front panel HMI for local monitoring and parameter modification
- Built-in fault diagnosis and self-test function
Application Scenarios:
- Medium and large synchronous generators in thermal power plants
- Hydropower station generator excitation control
- Grid-connected distributed power generation systems
- Combined cycle power generation units
- Power station excitation system reconstruction projects
Material Composition:
- Housing: Die-cast aluminum alloy shell with anti-corrosion powder coating
- PCB: FR4 multilayer fiberglass printed circuit board, lead-free soldering
- Core: High-performance industrial microprocessor, multi-channel ADC chips
- Power section: High power IGBT modules and rectifier assemblies
- Terminals: Tin-plated copper alloy heavy-duty screw terminals
Structural Features:
- Panel-mounted metal enclosure with IP20 front panel protection
- Front panel equipped with color LCD display, function buttons and status LED indicators
- Independent terminal blocks for PT/CT sensing, control power, field output and communication
- Standard cabinet cutout dimension for direct replacement of old excitation controllers
Working Principle: The controller synchronously samples three-phase voltage and current signals of generator. The microprocessor runs advanced control algorithm to calculate excitation demand. PWM power unit adjusts exciter field current continuously to stabilize generator terminal voltage. All limit protection functions run in real time through software. It supports data transmission to SCADA and remote parameter modification via communication ports.
Installation Requirements:
- Install inside ventilated power control cabinet, away from high temperature and strong magnetic field
- Reserve upper and lower space for heat dissipation
- Use shielded twisted pair cables for PT and CT signal wiring
- Separate low voltage signal wiring from high-power cables
- Implement reliable protective grounding following power station standards
Usage Notes:
- Input generator nameplate parameters and PT/CT ratio before commissioning
- Save full parameter backup file after commissioning
- Never exceed rated continuous field output current
- Regularly inspect terminal tightness and cable shielding condition
- Disconnect all power supplies before opening enclosure for maintenance
