PRISMIC® A12Excitation System

PRODUCT SPECIFICATION

Features

Complete excitation system mounted on a plate•Available either as a single unit or as a high integrity twin •configurationIntegrated Power System Stabiliser (optional)•Integrated auto synchroniser (optional)•Integrated speed detection eliminating need for seperate •speed switch Rotor earth fault detector input included eliminating the •need for separate unit Negativeforcingofexciterfieldvoltage•Modes of operation include generator terminal voltage •control,powerfactorcontrol,VArcontrolandoffloadVArs Digital Outputs•Analogue Input Signal for special application•Auxiliary power supply input allows easy setting of unit •without PMG supply presentManual Reference•Soft start for controlled application of excitation• Diode Failure Detection and Indication•HMI (Human Machine Interface) software • for advanced maintenance diagnostics and downloading of dataOscilloscope style trending and analogue data logging •(5ms resolution) via HMIEvent Logging •Externally mounted display interface computer (Optional)•Automatic and manual excitation limiters•

The following limiters are included:

Under Excitation Limiter•Over Excitation Limiter•Over Flux (V/Hz) Limiter•Stator Current Limiter•Fast Acting Field Current Limiter•Terminal Voltage Limiter•

Automatic transfer of control to hot standby channel initiated by:

Over Voltage Monitor Triggered•Under Voltage Monitor Triggered•Over Excitation Monitor Triggered•Under Excitation Monitor Triggered•Over Flux Monitor Triggered•Voltage Sensing Error•

The PRISMIC® A12 includes the following communication port

1 x RS232 service port•1 x CANbus port for communication with hot standby •unitintwinconfigurations1 x CANbus port available for connection of display • interface computer1 x RS485 / RS232 Modbus RTU port for SCADA/ • DCS communications1 x PROFIBUS port (optional)•Limiter and Monitor Settings

Introduction The PRISMIC® A12 excitation system has been designed to control the excitation of a brushless generator. It incorporates the latest digital micro controller technology to make it the most comprehensive and compact controller available.

The PRISMIC® A12 is based upon proven technology andcombines the experience and hardware of the BRUSHPRISMIC® A50 excitation controller. It includes, additional features such as intergrated speed detection, power system stabiliser and sychronisation. The PRISMIC® A12 is produced on a plate mounted system either as a single channel or twin channel arrangement. As a twin system each controller acts as a hot standby for the other and is independently controlled with auto tracking, and smooth transfer. An optional colour display screen is also available.

10/2009SM0000288B

BRUSH SEM s.r.o.Edvarda Benese 39/56430100Plzeň,TheCzechRepublicTel: +420 37 8210111Fax: +420 37 8210214Email: prismiccz@brush.euWeb: www.brush.eu

BRUSH Electrical Machines LtdFalcon Works, Nottingham Road,Loughborough, Leics. LE11 1EX EnglandTel: +44 (0)1509 611511 Fax: +44 (0)1509 610440E-mail: prismicuk@brush.euWeb: www.brush.eu

BRUSH HMA b.v.PO Box 3007, 2980 DA RidderkerkThe NetherlandsTel: +31 180 445500Fax: +31 180 445566Email: prismicnl@brush.euWeb: www.brush.eu

BRUSH Turbogenerators Inc.15110 Northwest Freeway, Suite 150,Houston, Texas 77040, USATel: +1281 580 1314Fax: +1281 580 5801Email: prismicus@brush.euWeb: www.brush.eu

BRUSH TurbogeneratorsWorld Trade Tower, Suite 1803,500 Guangdong Road, Shanghai,P.R.ChinaTel: +86 21-63621313Fax: +86 21-63621690Email: prismiccn@brush.euWeb: www.brush.eu

BRUSH TurbogeneratorsPO Box 111209, Abu Dhabi,United Arab EmiratesTel: +971 4362 6391Fax: +971 2550 1920Email: prismicme@brush.euWeb: www.brush.eu

BRUSH TurbogeneratorsLot 7 Jalan Majistret U1/26 HicomGlenmarie Ind. Park, 40150 ShahAlam, Selangor DE, MalaysiaTel: +60 (0) 3 7805 3736Fax: +60 (0) 3 7803 9625Email: prismicmy@brush.euWeb: www.brush.eu

BRUSH PRISMIC® Systems Worldwide Locations

Ratings Max continuous output current: 20AMax 10 second output current: 30AExcitation supply voltage: Single phase 85 to 264VExcitation supply frequency: 48Hz to 480HzNominal sensing voltage: 100V to 120VAuxiliary power supply: 24V d.c.Voltage sensing phases: Either 3 phase or 1 phaseNominal generator frequency: 50Hz or 60HzCurrent transformer input nominal: Either 5A or 1ACurrent transformer input burden: Less than 0.5VAMaximumfieldvoltageforforcing: 75%ofavailablePMGvoltage*Minimumfieldvoltage: -75%ofavailablePMGvoltage*Voltageadjustmentrange Selectablefrom+/-10%to+/-25%Accuracyofcontrol: +/-0.25%Operating temperature range: -20DegC to +50 DegCStorage temperature range: -20DegC to +80 DegCDimensions 570x699x185mm (HxWxD)Weight: 31kg Standards Applicable TheexcitationcontrollerisdesignedaccordingtoIEC61010.ThecontrollerfunctionsaccordingtotheAC8BmodeldefinedintheIEEE Std 421.5 2005 for Excitation Systems Modelling.