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DECS-250 DECS-250-LN1SN1N

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The DECS-250 (DECS-250-LN1SN1N) is an advanced digital excitation control system developed by Basler Electric to meet the needs of different application scenarios.
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Technical specifications for DECS-250 DECS-250-LN1SN1N

  • Manufacturer:
    Basler Electric
  • Part Number:
    DECS-250 DECS-250-LN1SN1N
  • Product Family:
    Basler Electric
  • Control Method:
    Digital Microprocessor Control
  • Excitation Output Type:
    PWM (Pulse Width Modulation) Power Unit
  • Continuous Rated Output Current:
    15 Adc (20 Adc below 55°C)
  • Power Supply Input Voltage:
    100-600 Vac (Single-phase or Three-phase)
  • Power Supply Input Frequency:
    50-500 Hz
  • Output DC Voltage Options:
    32 Vdc / 63 Vdc / 125 Vdc
  • Frequency Measurement Accuracy:
    ±0.1 Hz
  • FVR Setpoint Range:
    0 to 270 Vdc
  • FVR Regulation Accuracy:
    ±1.0% of Rated Value
  • Power System Stabilizer (PSS):
    Built-in
  • Weight:
    6.62 kg
  • Estimated shipping dimensions:
    15.9 cm x 30.5 cm x 21.9 cm
  • Tariff Code:
    8537101190
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications

Features:

  • Digital Excitation Control for Synchronous Generator and Motor Applications
  • Combines Capability of Voltage/Var/PF Regulation with Integrated Generator Protection
  • Operates in Conjunction with Synchronous Generators and Synchronous Motors
The DECS-250 DECS-250-LN1SN1N operates as a complete digital excitation control system, providing precise regulation and exceptional system response for synchronous machines. It continuously performs true RMS sensing of single-phase or three-phase voltage and current, and distributes control signals through integrated I/O to support steady state operation of generator excitation systems. Seamless mode transfer is standard with the DECS-250, however using an optional power system stabilizer will help meet stringent grid code compliance requirements in the event of dynamic stability challenges. The DECS-250 has made improvements in several areas over previous excitation control designs in addition to incorporating auto tuning capability with two PID stability groups.

The DECS-250 provides essential control functions common to the entire excitation system, and is a critical component of the generator protection path, directly affecting the proper, normal operation of the overall synchronous machine. One DECS-250 unit is required per generator depending on the desired control configuration. The DECS-250 occupies a compact package and delivers total functionality in a cost effective, easy-to-use format.

For Enhanced System Stability applications, the DECS-250 DECS-250-LN1SN1N supports optional integrated power system stabilizer (PSS) per IEEE Std. 421.5 type PSS2A/2B/2C. In addition to standard voltage regulation operation, the PSS configuration also performs automatic damping control. The DECS-250 dual stability group configuration executes tuning using the auto tuning feature specified in the control options. Using this method, the power system stabilizer continually monitors the grid frequency oscillations. If the system detects that the generator is experiencing unstable oscillations (outside configured damping levels), it will automatically apply stabilizing signals to the excitation system and maintain grid code compliance.

The DECS-250 DECS-250-LN1SN1N Basler Electric Digital Excitation Control System may still be available for purchase and support from authorized distributors with conformal coating applied to certain internal circuitry for additional protection and reliability.

Basler Electric DECS-250 DECS-250-LN1SN1N Digital Excitation Control System Manual, Datasheets, Applications, Links Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Basler Electric DECS-250 DECS-250-LN1SN1N Digital Excitation Control System

General

  • Manufacturer Basler Electric
  • Model DECS-250 DECS-250-LN1SN1N
  • Condition New Original ready stock
  • Product Family DECS-250N,DECS-250N-LN1SN1N
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Description
The DECS-250 is an advanced digital excitation control system developed by Basler Electric, specifically designed for excitation regulation of synchronous generators. The series includes multiple specific model configurations, such as DECS-250-LN1SN1N, to meet the requirements of different application scenarios.

The DECS-250 series utilizes full digital control technology to provide precise voltage regulation capabilities. The system supports multiple operating modes, including Automatic Voltage Regulation (AVR) mode, Manual/Field Current Regulation (FCR) mode, as well as Power Factor (PF) and Reactive Power (VAR) control modes. Specific models such as DECS-250-LN1SN1N feature comprehensive excitation limiting functions, including Under-Excitation Limiting (UEL), Over-Excitation Limiting (OEL), Volts-per-Hertz Limiting (V/Hz), and Over-Excitation Instantaneous Limiting protection characteristics.

The DECS-250 series controllers adopt a modular design. Specific models such as DECS-250-LN1SN1N are equipped with abundant input and output interfaces. The system supports multiple communication protocols, including Modbus RTU, Modbus TCP/IP, DNP3.0, and IEC 61850, facilitating integration with power plant automation systems. The series offers flexible power input options to accommodate different on-site power supply conditions.

The DECS-250 series digital excitation control systems are widely applied to various types of synchronous generators, including gas turbines, steam turbines, hydro turbines, and diesel generator sets. Specific models such as DECS-250-LN1SN1N are suitable for both new power plant projects and excitation system upgrade and retrofit projects in existing power plants, providing stable and reliable excitation control solutions for generators.
Alternative Names
DECS-250 DECS-250-LN1SN1N DECS-250N DECS 250
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What protection features are included?
Over/under excitation, stator current limit, reactive/V/Hz limits, EDM, excitation short, synchronism check, PMG loss, fault/event recording.
What communication interfaces are DECS-250 DECS-250-LN1SN1N provided?
USB, RS-232, Ethernet (RJ45/fiber), RS-485, CAN bus (SAE J1939), IRIG-B input.
What is the DECS-250 DECS-250-LN1SN1N environmental range?
-40°C to +60°C, MIL-STD 810E shock/vibration resistant, weight 6.62 kg.
What software and programming are supported?
BESTCOMSPlus® with graphical logic, real-time monitoring, PID auto-match, BESTlogic™Plus custom logic.
What certifications does DECS-250 DECS-250-LN1SN1N have?
CSA, UL, CE, Gost-R, BV, GL, DNV.