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Basler DECS-250 Instruction Manual
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Basler DECS-250 Instruction Manual

Digital excitation control system
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Basler Electric's DECS-250 digital excitation control system offers high
performance, high flexibility, and extreme reliability for brushless excited AC
synchronous generators. The DECS-250 offers a 15 amp pulse width modulated
power stage providing high field forcing. Multiple communication options and an
optional integrated power system stabilizer make the DECS-250 a complete system
solution in a reliable and cost effective package.
By utilizing the very intuitive BESTCOMSPlus
configuration, operation and control can be performed quickly and accurately.
The BESTCOMSPlus PC software utilizes the powerful and flexible BESTLogicPlus
programmable logic program. This integrates PLC capabilities allowing users to
customize their control scheme to meet virtually any application.
• True RMS sensing, Single or Three Phase voltage and current
• Full Generator Metering Capabilities
• AVR / FCR / FVR, Power Factor and var modes of operation
• Integrated Generator Protection ( 27/59, 81O/U, 32R, 40Q), EDM, 59F,
51F, Loss of PMG, Field Short Circuit, and 25 Sync Check
• Configurable Protection
• Overexcitation Limiting (with temperature compensation)
• Underexcitation Limiting
• Stator Current Limiting (with temperature compensation)
• Var Limiting
• Underfrequency Limiting or V/Hz Limiting
(continued on next page)
Interface for setting and communicating with Basler products
Request DECS-250-CD
ADDITIONAL INFORMATION
INSTRUCTION MANUAL
Request Publication 9440300990
PC software, the setup,
®
FEATURES
®
WINDOWS
SOFTWARE
12570 STATE ROUTE 143, HIGHLAND, ILLINOIS 62249 USA PHONE 618-654-2341 FAX 618-654-2351
DECS-250 Digital Excitation Control System
DECS-250
Digital Excitation
Control System
FEATURES
Pages 1 and 2
DESCRIPTION and

SPECIFICATIONS

Pages 2 and 3
INTERCONNECT
DIAGRAM
Page 4
FRONT, TOP VIEWS
and DIMENSIONS
Page 5
ACCESSORIES
Pages 6 and 7
ORDERING
Page 8
SZP-2
10-12

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Summary of Contents for Basler DECS-250

  • Page 1: Specifications

    Basler Electric's DECS-250 digital excitation control system offers high performance, high flexibility, and extreme reliability for brushless excited AC synchronous generators. The DECS-250 offers a 15 amp pulse width modulated power stage providing high field forcing. Multiple communication options and an optional integrated power system stabilizer make the DECS-250 a complete system solution in a reliable and cost effective package.
  • Page 2 • Profibus (optional) DECS-250 DESCRIPTION The DECS-250 is a microprocessor based excitation control system. The DECS-250 is designed to control and protect the generator and excitation system. Additionally, it provides extensive metering capabilities, communication capabilities, as well as fully programmable I/O. The DECS-250 provides excitation to the generator via a pulse width modulated power stage capable of 32Vdc, 63Vdc, or 125Vdc nominal voltages with a continuous output rating of 15Adc.
  • Page 3 USB: USB type B connector for communication with local computers. RS-232: RS-232, 9 pin, sub D, used to connect primary and backup DECS-250 or DECS-200 units. This port is only used for optional external autotracking. RS-485: Used to communicate with local and remote devices. Modbus RTU protocol.
  • Page 4 DECS-250 Digital Excitation Control System CONNECTIONS Figure 1 - Typical Connection Diagram...
  • Page 5 DECS-250 Digital Excitation Control System DIMENSIONS Front view Figure 3 - DECS-250 with Optional Escutcheon Plate view Figure 2 - Dimensions...
  • Page 6 Basler Electric offers two add-on modules to increase the already abundant contact input and output capability of the DECS-250. These modules communicate to the DECS-250 via SAE J1939 CANbus and allow the user to program the functionality of these inputs and outputs in Basler's very powerful logic program. The user can add labels for the inputs and outputs that appear in BESTCOMSPlus, on the front panel, and in programmable logic.
  • Page 7 AEM-2020 Basler's optional AEM-2020 module provides eight remote analog inputs, eight remote RTD inputs, two remote thermocouple inputs, and four remote analog outputs to the DECS-250. The AEM-2020 communicates with the DECS-250 through a CANbus interface. The eight analog inputs are user-selectable for 4 to 20 mA or 0 to 10 Vdc. Each analog input has under/over thresholds that can be configured as status only, alarm, or pre-alarm.

  • Page 8: How To Order

    DECS-250 Digital Excitation Control System HOW TO ORDER P .A.E. Les Pins, 67319 Wasselonne Cedex FRANCE Tel +33 3.88.87.1010 Fax +33 3.88.87.0808 e-mail: franceinfo@basler.com No. 59 Heshun Road Loufeng District (N), Suzhou Industrial Park, 215122, Suzhou, P .R.China Tel +86(0)512 8227 2888 Fax +86(0)512 8227 2887 12570 State Route 143, Highland, Illinois 62249-1074 USA e-mail: chinainfo@basler.com...