Published for the Basler Electric Power Systems Group #EX-RETRO • January 2012

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Basler Electric's Retrofit Family for Obsolete Excitation SystemsObsolete equipment,

hardware and servicing issuescan create challenges inproviding reliable power.

Today, Basler Electricoffers a full range of productsand services to replace orupgrade the existing voltageregulator or the entire staticexciter, as well as add orupgrade a power systemstabilizer to your system.

From a single shippedloose product to a completeinstallation and commission-ing, Basler can provide anexcitation package to meetyour needs.

Use the chart on page 4to select the manufacturer ofyour generator and theexcitation system type andprime mover. Then check Basler's recommendation fora pre-engineered and packaged voltage regulator orstatic exciter replacement.

Basler Excitation Control SystemsThe Basler Excitation Controls System family is

composed of microprocessor-based digital excitationcontrol systems that work with diesel, steam, gas, orhydro powered synchronous generation, as well asmotors.

The DECS-2100, DECS-400 and DECS-200/200Ncan communicate with SCADA systems via an RS485port via standard Modbus™ communication protocol.

DECS-200/200N Excitation SystemThe DECS-200/200N limits, controls and protects a

generator from operating outside of the machine’scapability. DECS-200N offers negative field forcing withnominal output 63Vdc or 125Vdc at 20Adc.

DECS-200 is UL recognized, CSA certified, CEcompliant, and DNV certified. The DECS-200N iscURus recognition per UL Standard 508, File E97035and CSA Standard C22.2 No. 14.

DECS-200 can accommodate 32Vdc, 63Vdc, or125Vdc applications up to 15Adc. This unique flexibil-ity provides precision control of generators of any size,

built on a pan chassis for easy installation into existingcabinet and interface. See page 4

The DECS-200 incorporates a pulse width modu-lated power stage, which improves system performancesin non-linear load applications . The DECS-200N isdesigned to provide both positive and negative fieldforcing for fast transient into the exciter field.

A redundant AVR system also is available, wherethe backup DECS automaticallytracks the output level of theprimary DECS and offersautomatic fault transfer toredundant DECS, plus:• Built in manual control• Automatic transfer to

manual upon loss of sensing• Generator voltage matching• Single or three phase power

50-420 Hertz• 15 amp single quadrant,

PWM dc outputFor details on the DECS-

200, request Bulletin SZM. TheDECS-200N is detailed inBulletin SZO.

DECS-2100 - excitation control system formain field applications

DECS-400 - dual voltage regulatorexciter cabinet

DECS-200 redundantvoltage regulator panel

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DECS-400 Excitation ControllerThe DECS-400 is a microprocessor-based controller

that provides excitation control, flexible logic control,and optional power system stabilization for synchronousmachines in an integrated package. The controllerprovides an analog output to control the firing ofexternal bridge(s) and monitors machine parameters tocontrol, limit, and protect the synchronous machinefrom operating beyond its capability limitations.

The optional power system stabilizer function is anIEEE-type PSS2A, dual input, “integral of acceleratingpower” stabilizer that provides supplementary dampingfor low-frequency local mode, inter area, and inter unitpower system oscillations.

Other features, but not limited too include:• Multiple Control Modes, with autotracking between

modes: Automatic Voltage Regulation (AVR), FieldCurrent Regulation (FCR), Field Voltage Regulation(FVR), Power Factor (PF), and Var Control

• 0.20% Voltage Regulation Accuracy• Off-line and On-line Excitation Limiter• Dual Slope Voltz/Hz Ratio or Underfrequency

Limiter• Stator Current Limiter (single phase or three phase)• Power system stabilizer PSS2B (optional)• Two pre-position set points for each mode• Two Programmable Analog Outputs

• Setup from FrontPanel HMI or by PC

• 40 Standard StabilitySettings

• Customizable Stabil-ity Setting with twoPID setting groups

• Reactive Droop, LineDrop Compensation

• Voltage Soft-StartBuildup

• Real Time Meteringfor 19 GeneratorParameters (2 Channel Chart Recorder)

• Dynamic System Analyzer (to perform frequencyresponse)

• Voltage Matching• Autotracking with Optional Backup DECS-400• Flexible Remote Set point Control

- Contact inputs- Proportional Analog input, ±10 Vdc or 4-20 mA- Digital Communications

• Local RS-232, ASCII, Modem Capabilities• RS-485, Modbus™, RJ-45 Ethernet• Setup and initial operation are facilitated by

BESTCOMS™, which offers:-real time monitoring test analysis-flexible oscillography, trending, sequence of events-expanded testing capabilities, including means forperforming frequency response tests

• UL Recognized, CSA certified, CE Compliant,GOST-R certified #POCC US.ME05.B03393

An Interactive Display Panel IDP-800, a touch-screen color display has control, status, alarm, meteringand setpoint adjust screens pre-programmed, forremote operation, using the RS-485 COM Port orEthernet of the DECS-400.

To learn more about the DECS-400, requestBulletin SZF; for details on the IDP-800, requestBulletin SZV.

Easy SetupUsers can set up the DECS-200/200N or DECS-400

from the front panel or by PC with providedBESTCOMS Windows®-based setup software, choosingfrom the standard stability selections or customizingtheir own stability selection.

BESTCOMS provides the means to tune yoursystem, commission it and provide analysis of its opera-tion. Recent enhancements include transient boostcapability and PID for field current regulation mode.

DECS-2100 Excitation Control SystemsThe DECS-2100 is a multi-microprocessor excita-

tion control system that provides advanced technologyto precisely control, protect, and monitor synchronousgenerators, including new and existing applications thatare driven by all types of prime movers, such as steam,gas, and hydro. Its multifunctional design allows theDECS-2100 to operate as a voltage regulator or as astatic exciter, providing excitation currents up to 10,000Adc.

BESTCOMS software allows for easy setup and commissioningof the DECS products

BESTCOMS software allows for the creation of settings withoutbeing connected to the unit.

IDP-800Interactive Display Panel

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Features include:• +0.1% Voltage Regulation Accuracy• Performance response <20 ms• Redundant Controllers with Independent Supervi-

sory Channel (options)• Six-SCR Power Rectifier Bridges Fixed or Low-,

Medium- and High-Voltage Drawer types• Patented Active Current Balance Algorithm• Multiple Excitation Limiters with on-line and off-

line settings and dual set points• Generator optimization by real-time limiter set point

recalibration• Optional Integrated Power System Stabilizer

IEEE Type PSS2A/2B with dual settings groups• Negative Field Forcing for highest performance• Multiple Operating Modes with Auto-following and

multiple protection functions with on-line and off-line settings and dual settings groups

• Programmable input/output terminations andsequencing provisions

• Frequency Response Analysis Tools• Autotuning

• Built-in Field Ground Protection (64F)• High Initial Response Per IEEE 421.2• RS-232, RS-485, ethernet and USB ports for

communications and data acquisition• BESTCOMS™Pro, a sophisticated software configu-

ration program for setup and testing• Continuous self diagnostic capabilities• Transient event recording and data logging• Incorporates fiber optics for critical signals• Provisions for Field Flashing from Station Service

Controller Configuration Tool (BESTCOMS™Pro)BESTCOMS™Pro is an easy-to-use software tool for

configuring, monitoring, and maintaining the DECS-2100 Digital Excitation Control System purchased. Itprovides operators and maintenance personnel withpassword access to the operational parameters andoptional configuration management of the DECS-2100Digital Excitation System through a laptop or desktopPC.

For details on DECS-2100, request Bulletin ECB.

Basler Electric's Retrofit Solution for Power System StabilizersIf a power system stabilizer is required due to

geographical location, generator size or a regulatingagency, Basler Electric can provide the PSS-100 PowerSystem Stabilizer.

Basler Electric's PSS-100 Power System Stabilizer is atwo-input, microprocessor-based stabilizer that measureschange of speed and change of power to produce theintegral of accelerating power.

The PSS-100 provides supplementary damping forlow frequency power system oscillations ranging from 0.1to 5.0Hz, which covers local mode, inter-area mode andinter-unit mode power system oscillations.

The PSS-100 can be integrated into new or existingexcitation systems. The open design allows compatibilitywith any size synchronous machine's analog or digitalexcitation system that can accept a bipolar dc inputadjustable to ±10Vdc.

Basler’s PSS-100 has been configured to work with anumber of existing automatic voltage regulators.• Brush Micro AVR and Prismic A30• Cutler Hammer MGR• ABB Unitrol F Digital and Unitrol M Analog• Westinghouse WTA

• Basler DECS-200N, SSE, SSE-N and DECS-300If your AVR is not listed, please contact Technical

Support at 618-654-2341.The PSS-100 also utilizes BESTCOMS software for

easy setup and tuning.To learn more, request Bulletin SRC and Applica-

tion Notes EX-PSS1 and EX-PSS2.

Manufacturer Product Power System Recommended Basler Power SystemName Stabilizing Method Replacement Stabilizing Method

Westinghouse F7 Frequency Based

GE LA300 Frequency Based Basler PSS-100 Integral ofor Speed Based Accelerating Power

LA400 (µPSS) Frequency Based

Power Technologies PTI Integral ofInc. Stabilizer Accelerating Power

The PSS-100 Power System Stabilizer provides control overfactors that influence the stability of a system.

EX-RETRO (1/12) Printed in U.S.A.

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e-mail: info@basler.com

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Tel +65 68.44.6445 Fax +65 65.68.44.8902e-mail: singaporeinfo@basler.com

Basler Electric's Retrofit Solutions

Manufacturer Model Voltage Regulator Excitation System Application Note

General Electric

GFA "Starwheel" DECS-200/200N Pan 3

DECS-400 or DECS-2100

EX-GFA1

GDA "Diactor" EX-DIAC2

Amplidyne DECS-400 or DECS-2100

EX-AMPLIDYNE

Potential Bus Fed EX-BUSFED SCT/PPT DECS-400 Pan 3 EX-SCTPPT

Alterrex DECS-400 or DECS-2100 DECS-2100

EX-ALT_BRDG (bridges) EX-ALT2 (drop-in bridges) EX-ALT3 (power source) EX-ALT_VR (regulator)

GE- Canada Silco 4 and 5 DECS-400 EX-SILCO1

Westinghouse/ Cutler-Hammer

Silverstat DECS-200/200N Pan 3

DECS-400 or DECS-2100

TRA

mag-a-stat (WMA)

DECS-400

BJ-30 EX-BJ30-1

Mag-a-trinistat EX-WTA1

MGR EX-MGR1 WTA 300

WTA 300B

Trinistat (WTA) DECS-2100

PRX DECS-400 Pan 1 EX-GTURB

WDR-2000 ECS/RW DECS-400 or DECS-2100 EX-WDR2000

Allis Chalmers Regulex DECS-400 DECS-400 or

DECS-2100

Statex

BBC AVR4 DECS-400 DECS-400 or DECS-2100

Beloit Portec DECS-400 EX-POR2

Brush MAVR DECS-200/200N Pan 3 EX-D200P3, EX-MAVR1

Electric Machinery VR60 or VR40 Series DECS-200/200N Pan 3

GM-EMD Vickers DECS-400

Siemens Thyrisiem DECS-400

Siemens Allis Siemens DECS-400 or DECS-2100

Basler SRA DECS-200 SSE DECS-400 DECS-400 EX-SSE1

ECS2100 DECS-2100 DECS-2100

For More InformationBasler Electric offers retrofit options for a variety of

existing applications, as shown in the chart above.The Application Notes referenced in the column on

the far right, provide practical information on specific

applications. You can download them from the Baslerweb site - http://www.basler.com.

You also can request additional information viaemail to info@basler.com or call our Customer ServiceDepartment at +1 618.654.2341.