Eaton Cutler-Hammer Digitrip RMS 910 Instructions Manual

Also see for Digitrip RMS 910: Instructions Instructional Leaflet Instruction leaflet

11.29-889APage14withouthavingtoremovethebreakerfromits enclosure.The available settingswouldgivethefollowingchoices:LongDelay Settinglr=lnx:.5.6.7 .8.85 .9.95 1.0Plugln=800ALDPUlr=:400480560640 680720760 800APlugln=1600ALDPUlr~.8009601120 1280136014401520 1600ANote:RatingplugsfromDigitripmodels 500/600/700/800CANNOT be usedwithmodel 910TripUnits.The connectionpinsarelocatedindifferentposi-tions,so onecannotaccidentally use theincorrecttypeof plug.RatingPlugsfor the Digitrip RMS910TripUnitsaremarkedfor,andmaybe appliedonboth50and 60Hzsystems.Ratingplugshavetwocurrentratingslistedontheir cov-ers(SeeFig.4).AsindicatedinFigs.2 and4,aback-upbatteryispro-videdto maintainthemodeoftripLEDindicationintheDigitrip RMS910TripUnitwhen externalcontrolpowertothePower/Relaymodule isnotavailable.The back-upbattery islocatedin the rating plug alongwith a batterycheck push-buttonand agreenbatterycheckLED.Thebatteryin theratingplugis“OK”iftheLEDlights“Green”when the “battery check”button nexttoitispushed.(SeeSection4.5.)Note:The batteryisusedonlytomaintainthecauseofTRIPLED indication.Ithas NOpartin the PRO-TECTION FUNCTIONoftheTripUnit,and,it doesNOT lightthedisplay window.1.4 Power/RelayModuleThe Power/RelayModule(PRM) (see Fig.5)isseparatefrom theRMSDigitrip910TripUnit itself,andisnotrequired fortheTripUnittoperform itsprotectionfunc-tions. The Power/ RelayModuleperformstwofunctions.First,itusesavailableexternalcontrol power(120V50/60Hz ac,6VA)tooperatethedisplaywindow, communica-tionscircuitry andreason fortrip LED indicators. Second,itprovides relaycontactsforuse byotherdevicesremotefromthecircuit breaker.•the“MustUse With Frame Rated” currentvalue(or“SensorRated”,ifapplicable),and• “ln(ratedl)=”currentvalue.Thislattervalue(ln)is the basisfortheTripUnitcurrentsettings:•Theinstantaneousand GroundCurrentSettings(ifapplicable)aremultiplesof(ln)(See Sections 3.6and3.8.)•TheLongDelay Current Setting,lr,isamultipleof(ln).Long Delay Current Setting=lr=LDx(ln).(See Section 3.2.)•TheShortDelay CurrentSetting(ifprovided) is amultipleoflr, which inturnisamultipleof(ln).Short DelayCurrent Setting =SD xlr=SDxLDx (ln)(See Section 3.4.)Ifthe rating plugismissingornotwell connected,thenthe display will show“PLUG” and the instantaneous/over-ride LED will belighted.Ifthe circuit breaker is closed,itwill trip;if itis open,it will remain trip-free,as long as 120VACcontrol power is availableto the Power /Relay Mod-ule. Evenifcontrol power is lost, and the rating plug con-dition is not corrected, as soon as the three-phasecurrent through the curcuit breaker reaches 20%(40%ifsingle-phase current) ofthe frame/currentsensor rating,the Trip Unit will trip the breaker again.NOTICETHE POWER/RELAYMODULE HAS120V50/60HZACINPUT AS STANDARD FOR ALL BREAKERTYPES.THEREIS AVAILABLE FOR CERTAINBREAKERTYPESA230V50/60INPUTVOLTAGERATING.BEFORE ENERGIZING THIS CONTROL VOLTAGEPLEASEVERIFYCORRECT VOLTAGE RATINGISEMPLOYED.THEDISPLAY,COMMUNICATION ORTRIP RELAYALARMS MAY BEERRATICORNON-FUNCTIONALIF WRONGVOLTAGE IS USED.lrlrAvailable SettingsLong DelaySettinglr0x ln=lr.5,.6,.7, .8,.85,.9, .95,10InMultiples ofRating PlugAmperes(In)Fig.8.1 Long Delay Current SettingsF:T'N Effective May 1997