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1、S Drafted Checked ReviewedApprovedACHENGGANG NUCLEARPHASE (21000MW) PROJECT文件編碼 DOC. S Drafted Checked ReviewedApprovedACHENGGANG NUCLEARPHASE (21000MW) PROJECT文件編碼 DOC. LBB -110V DCERSUPPLY(TRAINB) SYSTEM MANUAL CHAPTER 5 OPERATING PARAMETERSProject文件類Sub-ItemEngineeringCBA:LBA/LBB/LBP-125V DC B:C:

2、國家甲級工咨甲中廣核工程設 CertificationNO:NationalAgradeengineeringCertificationNO:編ernal is the property of CNPDC It must not be used、reproduced、transmitted or disclosed without the prior written permis of CNPDC 本文件之 屬于中廣核工程設計 。未獲本公司 ，任何人不得擅自使用、 、傳遞或 該文件。Rev 版版日狀編Drafted 校Checked 審Reviewed 批Approved 修改說明Modifi

3、cation-Rev 版版日狀編Drafted 校Checked 審Reviewed 批Approved 修改說明Modification-Rev 文件修版日章頁修改范圍及依據(jù)ARev 5OPERATING NORMAL STARTUPANDNORMALOTHERCONTROLLBB -110V ER SUPPLY (TRAIN B) SYSTEM Rev LBB -110V ER SUPPLY (TRAIN B) SYSTEM Rev NormalParticularsteady 5.3.1LossofACheautomaticmode,chargeroperationisas- After

4、 loss of ACer forriod of time lessnaswitchsetting(3-6-12min.), the charger is automatically restored to the pre-transient operating mode i.e. float orFloat The selector switch (001CC) is set to float. Voltage at charger terminals is mathe float voltage setting.Recharge/equalizeTheselectorswitch(001C

5、C)issettorecharge/equalize.Voltageatchargerterminalsis ained constanrecharge/equalize voltage setting.Manual mode(withloadVoltageisadjustedmanuallybyusingapotentiometer(locatedonthechargerregulation ed circuit board). This mode overrides the other three modes (automatic, float, recharge/equalize). V

6、oltage adjustment range is 0 to 156 V.The operator monitors charging current by using anothotentiometer(alsolocatedon the charger regulation pred circuit board) and maains ia value not exceeding0.03 Undernormaloperation,thechargers,fedfromtwo380VACswitchboards(oneofthem fed from the emergency-d380VA

7、Cswitchboard)providetheDCloadinparallel and float the battery or recharges it as nesary. The battery is only required to handle transient loWhen one charger failed or loss of ACer,allofloadscanbetransferredtoanother charger automatically or manually and locally.The charger selector Switch (001CC) is

8、 set to automatic. The charger is operatedfloat mode and voltage is maained constanfloat voltage setting.OPERATING LBB -110V ER SUPPLY (TRAIN B) SYSTEM Rev LBB -110V ER SUPPLY (TRAIN B) SYSTEM Rev StartupandnormalotherNotNotrecharge/equalize. The switch is mountedhechargerenclosure(switchsetto6 -Aft

9、er loss of ACer forriod of time greatern the switch setting, the charger resumes operationhe recharge/equalize mode for a duration determined by a timer (alsomountedinchargerenclosure)adjustablefrom0to60hours(timersetto15hours). The charger then switches to float service.Short-circuitonACandDCbuses

10、erformanceandcharacteristicsarenotaffectedbyashort-Selective tripis provided by time-delayed magnetic releasehebatteryandcharger ing breakers.Chargerover-currentprotectioncircuitryactuatesafterabout10ms. Short-circuit downstream of an outgoing breaker.Thebreakeristrippedafter8msbyitsmagneticrelease(

11、thistimeincludesrelayinertia and breaker opening time).After 90 ms. the batterying breaker trips causing the chargeropen automatically.The chargeringbreakerisopened(after8ms)resultinginautomatictripoftheAC (380 V) bus breaker. The batterying breaker does not trip because of itstime-delayed magnetic release. Short-circuito