The Basler DECS-200-2L is an advanced digital excitation regulator designed for synchronous generators in power generation applications, delivering ±0.25% voltage regulation accuracy under ISO 8528-5 standards. This ruggedized control system features dual-channel redundancy with automatic bumpless transfer, ensuring uninterrupted operation in 300MW steam turbine installations. The DECS-200-2L variant specifically supports 150VDC field voltage output with 0-200A continuous current capacity, making it ideal for hydroelectric plant excitation systems.
As part of Basler’s DECS-200 series, this unit integrates advanced PID algorithms with 5ms response time for grid code compliance during 30% step load changes. The dual Ethernet ports enable simultaneous Modbus TCP communication with DCS systems and IEC 61850 protocol support for smart grid integration. Its NEMA 4X-rated enclosure withstands 95% relative humidity in coastal power stations while maintaining stable operation from -40°C to +70°C.
Technical Specifications
| Parameter Name | Parameter Value |
|---|---|
| Product Model | DECS-200-2L |
| Manufacturer | Basler Electric |
| Product Type | Digital Excitation Control System |
| Input Voltage | 85-264VAC, 50/60Hz ±10% |
| Field Output | 0-200ADC @ 150VDC |
| Regulation Accuracy | ±0.25% of setpoint |
| Response Time | <5ms for 90% field forcing |
| Communication | Dual Ethernet, RS-485 Modbus |
| Protection Class | IP52 (NEMA 4X equivalent) |
| Operating Temp | -40°C to +70°C |
| Dimensions | 430mm x 320mm x 200mm |
| Weight | 15.8kg |
| Certifications | UL 508, CE, IEEE C37.90 |
Key Features and Advantages:
Adaptive control architecture: The DECS-200-2L employs real-time parameter estimation to automatically adjust PID coefficients based on generator Xd” reactance changes during black start operations. Its dual DSP processors achieve 0.01° phase measurement accuracy for grid synchronization.
Multi-function protection: Integrated 50/27 protection relay functionality detects under-voltage conditions within 1/4 cycle. The arc flash mitigation system reduces fault current within 2ms through dynamic braking resistor control.
Diagnostic capabilities: Continuous monitoring of 38 parameters including bearing insulation resistance (min 5MΩ) and rotor temperature (via RTD inputs). Front-panel LCD displays vector diagrams and oscillographic records for quick fault analysis.
Application Areas:
The Basler DECS-200-2L excels in:
- Power Plants: 600V brushless excitation for gas turbines
- Marine: 440V 60Hz shipboard power generation
- Mining: Excitation control for 10MW diesel generators
- Steel Mills: VAR compensation in arc furnace systems
In pumped-storage hydropower plants, this unit enables 0-100% field current reversal within 500ms for turbine braking. Offshore platforms utilize its salt fog corrosion resistance (ISO 9227 compliant) for generator paralleling operations. The system maintains 0.5% voltage droop during 15% frequency excursions in island mode operation.
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- DECS-150: Compact version for 75A applications
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Installation and Maintenance:
Installation preparation: Before mounting the DECS-200-2L, verify generator CT ratios (5000:5A max) and PT connections (120VAC nominal). Ensure minimum 150mm clearance around ventilation slots for proper heat dissipation in switchgear rooms.
Maintenance recommendations: Perform annual insulation resistance tests using 2500VDC meggers. Calibrate AVR potentiometers every 24 months using Basler’s DECS-200-CAL kit. Replace cooling fans after 50,000 operational hours in dusty environments.
Product Assurance:
HONG KONG SAUL ELECTRICAL LIMITED provides 12-month warranty for DECS-200-2L units with lifetime technical support. All units undergo 168-hour load cycling tests simulating 0-100-0% field current transitions. Our service network offers 48-hour emergency response with legacy DECS-100 system upgrade packages. Complete documentation including ANSI/IEEE C37.90.1 compliance certificates accompanies each unit.
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