Excitation Systems PRISMIC A32- Brochure

PRISMIC® A32Excitation ControllerIntroductionThe BRUSH PRISMIC® A32 excitation controller or automaticvoltage regulator (AVR) incorporates all the features usually required for control of a Brushless generator equipped with a single phase permanent magnet generator (PMG) pilot exciter.PRODUCT SPECIFICATIONPRISMIC® A32 Excitation ControllerThe A32 includes two fully featured independent controllers and two independent power circuits within a single 6U 19 inch enclosure. Each controller acts as a hot standby for the other and each channel is independently controlled with automatic tracking included to enable smooth transfer from one controller to the other.The A32 is one of the first excitation controllers to provide features such as an integrated power system stabiliser, a colour TFT display and Ethernet connectivity integrated into a single standard 19 inch rack package. These features also use already proven BRUSH technologies that have been developed for other BRUSH products and which are now in operational service with many large generating sets.FeaturesHigh integrity dual redundant excitation system in a single • 19 inch enclosureBuilt in power system stabiliser• Negative forcing of exciter field voltage• SCADA/DCS communications using Ethernet EGD or • RS232/RS485 Modbus protocolConforms to CE directives and CSA/UL approval pending• Compatible connections with earlier BRUSH products for • easy upgradesAutomatic tracking between channels in all modes• Built in colour TFT operator interface • Including PC Human Machine Interface (HMI) software • for advanced maintenance diagnostics and downloading of dataDigital (discrete) outputs for remote status indication• Analogue input signal for special applications • Modes of operation include generator terminal voltage • control, power factor control, VAr control and offload VArsMonitoring of rotating rectifier health and diode failure • indication The following limiters are included:• - Over excitation limiter- Under excitation limiter- Over flux limiter- Fast acting field current limiter- Stator current limiterAutomatic switching to standby initiated by the • following conditions:- Over voltage monitor triggered- Under voltage monitor triggered- Over excitation monitor triggered- Under excitation monitor triggered- Over flux monitor triggered- Voltage sensing errorSpeed detector included eliminating the need for • separate speed switch unitRotor earth fault detector input included eliminating the • need for separate unitAuxiliary power supply input allows easy setting of unit • without PMG supply presentSoft start for controlled application of excitation• Limiter and Monitor Settings11/2008BRUSH SEM s.r.o.Edvarda Benese 39, 301 00 PlzenCzech RepublicTel: +420 37 8210111Fax: +420 37 8210214Email: salescz@brush.euWeb: www.brush.euBRUSH ELECTRICAL MACHINES LtdFalcon Works, Nottingham Road,Loughborough, Leics. LE11 1EX EnglandTel: +44 (0)1509 611511 Fax: +44 (0)1509 610440E-mail: salesuk@brush.euWeb: www.brush.euBRUSH HMA b.v.PO Box 3007, 2980 DA RidderkerkThe NetherlandsTel: +31 180 445500Fax: +31 180 445566Email: salesnl@brush.euWeb: www.brush.euBRUSH TURBOGENERATORS Inc.15110 Northwest Freeway, Suite 150,Houston, Texas 77040, USATel: +1 (281) 580 1314Fax: +1 (281) 580 5801Email: salesus@brush.euWeb: www.brush.euSM0000259GCertificate No 21024 Certificate No 21025 Certificate No 936683 Certificate No 00282 Certificate No 00066RatingsMax continuous output current: 20A Max 10 second output current: 30A* Excitation supply voltage: Single phase 110V to 330V Supply frequency: 50Hz to 480Hz Nominal sensing voltage: 100V to 120V selectable in 0.1V steps Voltage sensing phases: 3 phase or single phaseNominal generator frequency: 50Hz or 60HzCurrent transformer input nominal: 5A or 1ACurrent transformer input burden: 0.3VALoad taken by sensing inputs: 0.3VAMaximum field voltage for forcing: 70% of available excitation supply voltage*Minimum field voltage: -70% of available excitation supply voltage*Voltage adjustment range: Selectable from +/-10% to +/-25%Accuracy of control: +/-0.5%Auxiliary power supply: 24V d.c.Operating temperature range: 0C to +55CStorage temperature range: -20C to +80CDimensions: Width 483mm, height 266mm, depth 406mmWeight: 23kg* Depending upon regulation of excitation power supply. PRISMIC® A32 Excitation Controller Power Converter A Power Converter B Control Channel A including AVR & PSS Control Channel B including AVR & PSS Field Suppression RS232 & RS485 interfaces TFT Operator Console and KeypadBrushlessSynchronousACGeneratorE~ExciterExciter FieldPMG Ethernet interface Custom interface (ask BRUSH)