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Key Technical Specifications
| Parameter | Specification Value |
| Manufacturer | Basler Electric |
| Part Number / Model | DECS-200-2L |
| Control Modes | Automatic Voltage Regulation (AVR), Var Control, Power Factor (PF) Control, Field Current Regulation (FCR) |
| Continuous Field Output | 15 A DC |
| Forcing Field Output | 30 A DC for 10 seconds |
| Maximum Field Voltage | 200 VDC |
| Sensing Input Voltage | 100 to 600 VAC (1-phase or 3-phase, 50/60 Hz) |
| Power Input Range | 100 to 280 VAC, 50 to 400 Hz (or 100 to 300 VDC) |
| Communication Ports | RS-232, RS-485, CANbus (Modbus RTU support) |
| Protection Functions | Overexcitation Limiter, Underexcitation Limiter, Volts/Hz Limiter, Generator Overvoltage/Undervoltage |
| Operating Temperature | -40°C to +70°C (-40°F to +158°F) |
| Enclosure Rating | Panel Mount / NEMA Type 1 equivalent |
Product Introduction & Supply Chain Strategy
The Basler DECS-200-2L is a microprocessor-based digital excitation control system designed to regulate the output voltage and reactive power of brushless or static-excited synchronous generators. It combines primary regulation modes—AVR, Field Current Regulation, Var, and Power Factor control—with integrated protective limiters to guard against generator field damage.
Holding this unit as New Surplus provides crucial risk mitigation for power plants, microgrids, and critical backup generator systems. Replacing a failed excitation controller with a refurbished alternative introduces significant operational risks due to latent semiconductor aging or thermal stress on power output stages. Sourcing a verified New Surplus DECS-200-2L ensures total system reliability, guarantees clean power generation, and minimizes Total Cost of Ownership (TCO).
DECS-200-2L
DECS-200-2L
Installation & Configuration Guide
1.Stage 1: Pre-Installation Prep & Safety Lockout:Prerequisite.
Perform Lock-Out/Tag-Out (LOTO) on the generator prime mover, sensing PT connections, and field supply power inputs. Ensure generator field bus discharge resistors are engaged. Put on a grounded ESD wrist strap before handling terminal connectors.
2.Stage 2: Removal & Mechanical Mounting:Mechanical Mounting.
Label and disconnect all terminal block wiring from the rear panel. Unbolt the old controller from the enclosure sub-panel. Mount the new DECS-200-2L securely using M5 fasteners, ensuring adequate clearance around heat sink fins for proper air circulation.
3.Stage 3: Wiring Verification & Hardware Setup:Wiring & DIP Config.
Land field power (+F, -F), sensing inputs, and current transformer (CT) wires per the original schematic. Replicate hardware jumper positions and terminal links for sensing ranges exactly as configured on the legacy controller.
4.Stage 4: Parameter Load & Generator Testing:Commissioning.
Connect a PC via the RS-232 port using Basler BESTCOMS software to upload the saved configuration settings. Apply auxiliary power, verify normal display startup without active alarm codes, start the engine at idle, and perform no-load voltage buildup verification.
Firmware/Software Versions & Upgrade Notes
- Software Configuration Tool: Parameter management requires Basler BESTCOMS or BESTCOMS Plus software matching the controller’s firmware release.
- Firmware Backup: Always read and save the existing
.cfgparameter file from the active unit before removing it from service. Parameters must be pushed to the new DECS-200-2L before running the generator under load. - Compatibility Notice: Ensure CT ratios and PT sensing secondary voltages match the new unit’s configuration jumpers. Software parameter mismatches in stability settings (P, I, D gains) can lead to output voltage hunting or bus instability upon sync.
Frequently Asked Questions (FAQ)
Q: Is this Basler DECS-200-2L unit brand new or refurbished?
A: This product is 100% Brand New Surplus. It has never been installed on a live generator set, never wired into a field control panel, and never repaired. It remains in original packaging and has passed full quality verification.
Q: Why should I choose New Surplus over a cheaper refurbished AVR?
A: Generator excitation controllers process high power outputs to feed rotor fields. Refurbished boards often contain aged power transistors, dried-out capacitors, or degraded power supplies that fail under heavy electrical step loads. New Surplus provides factory-level endurance and eliminates generator trip risks.
Q: Does the require software programming before it can operate?
A: Yes. While the unit boots out of the box, PID stability parameters, generator rated voltage, CT/PT ratios, and limiter thresholds must be programmed via Basler BESTCOMS software to match your specific generator nameplate data.
Q: Can I run this controller in parallel with the utility grid?
A: Yes. The supports Var and Power Factor (PF) control modes, as well as reactive droop compensation, making it fully capable of operating in parallel with the utility grid or with other generators.
Q: What warranty is included with this Basler module?
A: We provide a comprehensive 1-year replacement warranty on this New Surplus unit from the date of purchase. Any defect discovered during installation or bench testing qualifies for immediate replacement from our warehouse inventory.
