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• SX440 AUTOMATIC VOLTAGEREGULATOR(AVR) SPECIFICATION,INSTALLATION AND ADJUSTMENTSGeneral description SX440 is a half-wave phase-controlled thyristor typeAutomatic Voltage Regulator(AVR) and kinds a part of theexcitation system for a brush-less generator In addition to regulating the generator voltage, the AVRcircuitry includes under-speed and sensing lossprotection elements Excitation strength is derived directlyfrom the generator terminals Positive voltage increase from residual stages is ensuredby the use of effective semiconductors within the powercircuitry of the AVR The AVR is linked with the key stator windings and theexciter area windings to supply closed loop control of theoutput voltage with load legislation of +/-1% In addition to being powered from the main stator,theAVR additionally derives a sample voltage from the outputwindings for voltage management applications In response to thissample voltage,the AVR controls the power fed to theexciter field,and hence the major field, to maintain themachine output voltage within the specified limits,compensating for load,speed, temperature and powerfactor of the generator A frequency measuring circuit constantly screens thegenerator output and provides output under-speedprotection of the excitation system,by decreasing the outputvoltage proportionally with pace below a pre-settablethreshold A manual adjustment is supplied for factorysetting of the under frequency roll off point,(UFRO) easily be changed to 50 or 60 Hz within the subject by push-on hyperlink choice Provision is made for the connection of a distant voltagetrimmer, permitting the person effective management of the generator&;soutput An analogue enter is supplied permitting connection to aNewage Power Factor controller or other external deviceswith well suited output The AVR has the facility for hunch CT connection,to allowparallel operating with different equally geared up mills Technical specification INPUT Voltage 190-264V ac Frequency 50-60 Hz nominal Phase 1 Wire 2 OUTPUT Voltagemax 90V dc at 207V ac enter Currentcontinuous 4A dc Intermittent 6A for 10 secs Resistance 15 ohms minimum REGULATION +/-1%(see be aware 1) THERMAL DRIFT 0% consistent with deg exchange in AVR ambient(note 2) TYPICAL SYSTEM RESPONSE AVR response 20ms Filed recent to 90%80 ms MachineVolts to 97%300ms EXTERNAL VOLTA GE ADJUSTMENT +/-10%with 1 k ohm 1 watt trimmer(see observe 3) UNDER FREQUENCY PROTECTION Set point 95% Hz(see be aware 4) Slope 170% right down to 30 Hz UNIT POWER DISSIPATION 12 watts maximum BUILD UP VOLTA GE four Volts @ AVR terminals ANALOGUE INPUT Maximum enter +/-5V dc (see word 5) Sensitivity 1v for 5% Generator Volts (adjustable) Input resistance 1k ohm QUADRATURE DROOP INPUT 10 ohms burden Max:0 A for 5% droop 0PF Max: 0 ENVIRONMENTAL Vibration 20-100 Hz50mm/sec 100Hz 2kHz3 Operating temperature -40to+70℃ Relative Humidity 0-70℃95%(see word 6) Storage temperature -55to+80℃ NOTES 1 4% engine governing 2 10 minutes 3 to Mod fame S onwards Generator de-ratemay follow with manufacturing unit 4 set,semi-sealed,jumper selectable 5 system linked to the analogue enter should befully floating (galvanically isolated from ground),with aninsulation strength of 500V ac 6 Non condensing Sensing Input Terminal 0-110V = 90~150V Terminal 0-220V = 175~260V Terminal 0-380V = 350~520V Power Input Voltage 100~264 VAC, Single Phase Output Voltage Max ninety VDC at 207 VAC Current Continuous four ADC, Intermittent 10A for 10 sec Thermal Drift 0% according to °C replace in AVR ambient DROOP Input Max input 0 Burden 10 Ω 0 for 5% slump (PF=0) Under Frequency Protection U/F Potentiometer 45~60 Hz Voltage Regulation < ± 1% (with 4% engine governing) External Volts Adjustment ±8% @ 1 KΩ Voltage Build-up Residual volts at AVR terminal > 5 VAC EMI Suppression Internal Electromagnetic Interference Filtering Exciter Resistor DC Resistance 20~100 Ω Analogue Input Max Input ±5 VDC Input Resistance 1 KΩ 1V for 5% generator volts Unit Power Dissipation Max 12 Watt Environment Vibration : 1 G @ 5~30 Hz , five G @ 30~500 Hz Relative Humidity : < 95% Operating Temperature : -40~60 °C Storage Temperature : -40~85 °C

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