Generator Excitation Control Solution – Basler DECS-250-LN2SN1N | DECS-250 Series
Where This Product Is Used
The Basler DECS-250-LN2SN1N is a high-performance digital excitation control system (AVR) engineered for synchronous generators in demanding power generation environments. Engineers and plant operators specify this unit across a wide range of critical applications:
- Utility & Industrial Power Plants – Precise voltage regulation and reactive power control for grid-connected generators up to large MW-class machines.
- Standby & Emergency Diesel Generator Sets – Reliable automatic voltage regulation ensuring stable output during load transients and fault conditions.
- Hydroelectric & Gas Turbine Generators – Adaptive excitation control compatible with various prime mover dynamics.
- Marine & Offshore Power Systems – Robust design suitable for harsh environments with vibration and temperature variation.
- Cogeneration (CHP) Plants – Coordinated VAR/power factor control for parallel operation with the utility grid.
- Mining & Heavy Industry – Stable voltage supply for large motor loads and variable industrial demand profiles.
Technical Specifications
| Parameter | Value |
|---|---|
| Model | DECS-250-LN2SN1N |
| Series | DECS-250 |
| Manufacturer | Basler Electric |
| Function | Digital Excitation Control System / Automatic Voltage Regulator (AVR) |
| Sensing Voltage Input | Configurable (single-phase or three-phase) |
| Field Voltage Output | Up to 250 VDC (model dependent) |
| Control Modes | AVR, FCR (Field Current Regulation), VAR/PF Control, Droop |
| Communication | RS-232 / RS-485; optional Modbus RTU |
| Protection Functions | Over/under excitation, V/Hz limiting, loss of sensing, soft start |
| Operating Temperature | -40°C to +70°C |
| Mounting | Panel / DIN rail compatible enclosure |
| Weight | 420 g (approx.) |
| Compliance | CE, UL recognized components |
Why Engineers Specify This Model
- Multi-Mode Control Flexibility – Seamlessly switch between AVR, FCR, VAR, and power factor modes without hardware changes, reducing commissioning time.
- Advanced Protection Suite – Built-in V/Hz limiter, loss-of-sensing protection, and soft-start ramp prevent generator damage during fault events.
- Digital Precision – Microprocessor-based control delivers tighter voltage regulation (typically ±0.5%) versus analog AVRs, improving power quality.
- Parallel Operation Ready – Integrated droop and cross-current compensation enable stable load sharing in multi-generator bus configurations.
- Remote Monitoring & SCADA Integration – RS-485 Modbus RTU interface allows integration into plant DCS/SCADA systems for remote setpoint adjustment and diagnostics.
- Wide Temperature Range – Rated for -40°C to +70°C, making it suitable for outdoor switchgear enclosures and arctic/tropical climates.
Complete System Bill of Materials
For a complete generator excitation control system using the DECS-250-LN2SN1N, engineers typically specify the following companion components:
- Basler DECS-250-LN2SN1N – Digital Excitation Control System (this unit)
- Potential Transformer (PT) – Generator sensing voltage step-down
- Current Transformer (CT) – Load current sensing for droop/VAR control
- Exciter Field Diode Bridge – Rotating rectifier assembly
- Power Management Relay (PMR) – Generator protection relay
- RS-485 to USB Converter – For laptop-based commissioning via BESTCOMS software
- Basler BESTCOMS-Plus Software – PC configuration and monitoring tool (free download)
- 24 VDC Auxiliary Power Supply – For DECS-250 control power input
Compliance & Industry Standards
- CE Marking – Compliant with EU Low Voltage Directive and EMC Directive
- UL Recognized Components – Key internal components UL listed
- IEEE Std 421.5 – Excitation system models for power system stability studies
- IEC 60034-16 – Rotating electrical machines excitation systems
- NEMA MG-1 – Compatible with NEMA-rated generator sets
Quality Assurance & Sourcing
Konmask.com sources the Basler DECS-250-LN2SN1N exclusively through authorized distribution channels and verified industrial surplus networks. Every unit undergoes the following before shipment:
- Visual inspection for physical damage, corrosion, and label integrity
- Firmware version verification and documentation
- Functional power-on test where applicable
- Anti-static packaging with humidity indicator card
- Certificate of conformance available upon request
We maintain traceability records for all units and can provide sourcing documentation for regulated industries including utilities, oil & gas, and defense.
How to Source This Part
Ready to order or need a formal quotation? Contact our industrial automation team:
- Online Order – Add to cart and check out directly on this page
- RFQ / Bulk Inquiry – Email [email protected] with quantity and required delivery date
- Phone / WhatsApp – +0086 19859288691 (Mon–Sat, 09:00–18:00 CST)
- Lead Time – In-stock units ship within 1–3 business days; ex-stock orders quoted within 24 hours
- Export & Customs – We handle export documentation (commercial invoice, packing list, CO) for international buyers
Application-Specific FAQ
Q: Is the DECS-250-LN2SN1N compatible with brushless excitation systems?
A: Yes. The DECS-250 series supports both static and brushless (rotating) excitation topologies. The LN2SN1N suffix indicates specific I/O and communication configuration — confirm your exciter type during commissioning.
Q: Can this unit replace an older analog AVR on an existing generator?
A: In most cases, yes. The DECS-250 is designed as a retrofit-friendly digital replacement for legacy analog AVRs. Field wiring is typically compatible; however, a site survey of sensing and field voltage ratings is recommended before installation.
Q: Does Konmask provide BESTCOMS configuration support?
A: Yes. Our technical team can assist with initial parameter setup and BESTCOMS-Plus configuration files for standard generator applications. Contact us with your generator nameplate data.
Q: What is the warranty on this unit?
A: Konmask offers a 90-day functional warranty on all tested units. Extended warranty and service contracts are available — contact us for details.
Q: Can I order in bulk for a multi-unit power plant project?
A: Absolutely. We support project-based procurement with staged delivery, consolidated shipping, and volume pricing. Submit your BOM to [email protected] for a project quotation.
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Contact: [email protected] | +0086 19859288691
