Description

The Basler DECS-200-2L is a digital excitation control system manufactured by Basler Electric,designed to regulate the excitation of synchronous generators.It integrates automatic voltage regulation(AVR),protection features,and advanced diagnostics into one compact module.

This controller ensures accurate output voltage under varying load conditions,supports protective interlocks,and enables remote monitoring and control—making it ideal for power generation,backup power,or industrial generator applications.

Parameter

Main Parameters Value/Description

Product Model DECS-200-2L

Manufacturer Basler Electric

Product Category Digital Excitation Controller(AVR/Generator Exciter Controller)

Input Power(Auxiliary/Control Supply)24 VDC nominal(operating range~18-36 VDC)

Field Output/Excitation Voltage Adjustable DC field voltage(typical ranges e.g.up to~125 VDC or more depending on generator size)

Field Output Current Depends on generator exciter size;standard models handle modest currents(e.g.up to 10-15 A)

Voltage Regulation Accuracy≈±0.25%(some sources list±0.25 or±0.5 depending on model/conditions)

Response Time<5 ms for major step change(90%change in field demand)in some listings;<20 ms in more conservative specs.

Operating Temperature Range-40°C to+70°C

Humidity/Environment 5%to 95%non-condensing;rugged enclosure to resist harsh environment effects

Protections Included Over-voltage,Under-voltage,Over-current,Field loss,Thermal,etc.

Communication Interfaces Modbus RTU(some versions),optional Ethernet/network options in advanced versions

Mounting/Enclosure Panel or rack mount;robust enclosure,possibly NEMA/weather-resistant in certain versions

Technical Principles and Innovative Values

Innovation Point 1:Digital control with precise AVR(Automatic Voltage Regulation)algorithms ensures stable voltage output under rapidly changing load conditions—DECS-200-2L handles dynamic load without major overshoot or undershoot.

Innovation Point 2:Field output feedback loop allows continuous monitoring of the excitation current/field feedback,ensuring the exciter is doing its job and failing safe when not—this helps prevent generator instability or failure.

Innovation Point 3:Protective features built-in(over/under voltage,field loss,overcurrent,thermal protection)make DECS-200-2L more reliable;reduces risk of damage to exciter or main generator in fault scenarios.

Innovation Point 4:Fast response times(<5-20 ms depending on variant)let the controller react quickly to disturbances(e.g.load steps,grid changes),improving generator stability and reducing flicker or voltage swings.

Innovation Point 5:Flexible communication and diagnostics(Modbus,optional Ethernet,local displays,status/alarm outputs)enable integration into modern PLC/DCS/SCADA systems,facilitating remote monitoring and data-driven maintenance.

Application Cases and Industry Value

Project Case 1:A mid-size gas turbine power plant experienced voltage fluctuations during load changes.By installing Basler DECS-200-2L,the plant reduced voltage drift,improving power quality for sensitive downstream loads.The controller’s quick response and accurate regulation also reduced reactive power demands,improving overall efficiency.

Project Case 2:In a backup generator installation for a hospital,reliability and strict voltage regulation are critical.DECS-200-2L provided stable output even during load swings(e.g.when HVAC or medical equipment cycles),enabling the hospital to maintain critical systems without brown-outs or overvoltage stress.Users reported fewer alarms,better performance,and confidence in system readiness.

Related Product Combination Solutions

Here are modules or products often used together with Basler DECS-200-2L or considered alternatives/expansions:

Basler DECS-250–For higher field current/larger generator capacity where DECS-200-2L may be undersized.

Basler DECS-150–A more compact version,good for smaller generator sets.

Basler SPM-A–Synchronizing&protection module,complements DECS-200-2L in multi-generator or distributed generation setups.

Generator Remote Monitoring/SCADA interface units–for connecting DECS-200-2L into DCS/SCADA networks.

Voltage/Current Sensing Transformers/PT/CT Interfaces–feed data into DECS-200-2L for accurate regulation.

Backup Exciter/Field Flash Systems–ensures excitation during startup or backup power modes.

Installation,Maintenance,and Full-Cycle Support

Installation:Mount DECS-200-2L in a clean,ventilated enclosure.Ensure auxiliary supply voltage is stable and matches spec(e.g.,~24-30 VDC if that’s the variant).Connect voltage sensing,field output lines,and ensure proper grounding and cable shielding(especially on sensing inputs)to avoid noise interfering with regulation.

Commissioning:Set regulation parameters(voltage setpoint,droop or no droop,response speed).Run load-step tests to confirm the response of voltage variation is within acceptable tolerances.Calibrate sensing circuits and ensure protection thresholds are set as per the generator manufacturer’s recommendation.

Maintenance:Regularly check for loose connections,inspect cooling or airflow,ensure ventilation.Monitor controller diagnostics for warnings(field loss,thermal alarms,overcurrent).Keep firmware updated if support provided.Have spare potentiometers or sensors as needed.

Support:Basler and authorized distributors typically provide product documentation,local calibration and installation assistance,replacement parts,and warranty(often 12 months).When using DECS-200-2L in mission-critical systems,keep a spare unit ready for quick swap-out to avoid downtime.Ensure compatibility with your DCS/PLC and communication protocols for seamless integration.