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1、Drafted Checked Reviewed Approved Modification-AFANGCHENGGANGNUCLEARPOWER PHASE (21000MW) PROJECT文件编DOC. LNCPRODUCTIONANDDISTRIBUTION 220VAC VITAL SYSTEM MANUALCHAPTER 5 OPERATING工程Project文件类Document子项Sub-Item设计阶EngineeringCBDocument A:B:C:深圳中广核工程设计有限公司 NationalAgradeengineeringCertificationNO:Natio

2、nalAgradeengineeringCertificationNO:内部编码Internal This document is the property of CNPDC It must not be used、reproduced、transmitted or disclosed without the prior written permission of CNPDC 本文件之产权属于中广核工程设文文件种类LNCPRODUCTIONLNCPRODUCTIONANDDISTRIBUTION220VACVITALSYSTEM5OPERATINGRev版本记REVISION版日状编Draft

3、ed校Checked审Reviewed批Approved修改说Modification-文件修改记版日章页修改范围及依A2010-3-FIRSTLNCPRODUCTIONLNCPRODUCTIONANDDISTRIBUTION220VACVITALSYSTEM5OPERATINGRevTOC o 1-2 h z u HYPERLINK l _TOC_250006 OPERATING HYPERLINK l _TOC_250005 HYPERLINK l _TOC_250004 HYPERLINK l _TOC_250003 HYPERLINK l _TOC_250002 STARTUPANDN

4、ORMAL HYPERLINK l _TOC_250001 OTHER HYPERLINK l _TOC_250000 CONTROLLNCPRODUCTIONLNCPRODUCTIONANDDISTRIBUTION220VACVITALSYSTEM5OPERATINGRevOPERATINGNormalUnder normal operation, the charger fed from the emergency-supplied 380V AC switchboard,providestheinverterandfloatsthebatteryorrechargesitasnecess

5、ary. The battery is only required to handle transient load peaks. The charger selector switch (001CC) is set to automatic. The charger is operated in the float mode and voltage is maintained constant at float voltage setting.Followingtheinverterpowersthedistributionunit,whiletheinverterswitch(101CC)

6、 is on position on and the bypass switch (102 CC) is on position inverter.TheinverterisoperatedParticularsteadyChargerfloat Theselectorswitch(001CC)issettofloat.Voltageatchargerterminalsis maintained constant at the float voltage setting.Charger recharge/equalize Theselectorswitch(001CC)issettorecha

7、rge/equalize.Voltageatcharger terminals is maintained constant at recharge/equalize voltage setting.Chargermanualmode(withloadVoltageisadjustedmanuallybyusingapotentiometer(locatedonthecharger regulation printed circuit board). This mode overrides the other three modes (automatic, float, recharge/eq

8、ualize). Voltage adjustment range is 0 to 156 V.Theoperatormonitorschargingcurrentbyusinganotherpotentiometer(alsolocated on the charger regulation printed circuit board) and maintains it at a value not exceeding 0.03 C10(Ah).Inverter In case of loss the 110VDC voltage or an internal defect of the i

9、nverter, the power supplyisautomaticallyprovidedthroughatransformerregulatorpoweredfromthe 380V AC switchboard.Inverter In case of the inverter not available or during maintenance, the power supply is manuallyswitchedovertothe380VACswitchboardthoughamanualbypassswitch ParticulartransientLossofACchar

10、gerinputIntheautomaticmode,chargeroperationisasAfterlossofACpowerforaperiodoftimelessthanaswitchsetting(3-6-12min.), the charger is automatically restored to the pre-transient operating mode i.e. float or recharge/equalize. The switch is mounted in the charger enclosure (switch set to 6 After loss o

11、f AC power for a period of lime greater than the switch setting, the chargerresumesoperationintherecharge/equalizemodeforadurationdeterminedby atimer(alsomountedinchargerenclosure) adjustablefrom0to60hours(timersetto 15 hours). The charger then switches to float service.ChargerShortcircuit Charger p

12、erformance and characteristics are not affected by a short circuit. Selectivetrippingisprovidedbytime-delayedmagneticreleaseinthebattery incoming breaker.Chargerovercurrentprotectioncircuitryactuatesafterabout10ms. Short-circuit downstream of an outgoing breakerThebreakeristrippedafter8msbyitsmagnet

13、icrelease(thistimeincludesrelay inertia and breaker opening time).Short-circuitontheDCAfter90ms,thebatteryincomingbreakertrips; Short -circuit downstream of chargerThechargerisabletosupplyconstantlynominalcurrentalsoincaseofshortcircuit, iftheshortcircuitexitforalongtime(thetimewillbedecidedbytheman

14、ufactory), the charger will switch off the incoming breaker with help the charger over current and under voltage protection. The battery incoming breaker does not trip because of its time-delayed magnetic release.Short-circuitonACsideofThechargerAC(380V)busbreakerisCharger ThechargerincomingandACbus

15、breakers(101JA)areautomaticallyInverter TheinverterDCbreaker(102JA)isautomaticallySuddenvariationsorlossof110Vvoltagefor inverterDuring sodden variations in the inverter power supply voltage (from 96.3V to 121V), the instantaneous variation in the switchboard voltage does not exceed 15% of 220V. Sho

16、uldthevoltagedropbelow96.3VDCorriseabove121VDCtheinverterwilltrip and a transfer to the standby supply will be initiated.Load variations ontheinverterFor instantaneous load variations of 50% when initial power is between nominal powerand30%ofnominalpoweraslongastheinstantaneouspowerdoesnotexceed the nominal power and since the power supply voltage of the inverter is from 85% to 110% Un, the output voltage comes