Eaton Cutler-Hammer Digitrip RMS 910 Instructions Manual

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

I.L.29-889APage9TABLE3-DIGITRIPRMS910 TRIPUNITMESSAGECODESANDTHEIR MEANINGSMESSAGE MEANING COMMENT SEC.DISCDiscriminatorTrip!(Highinitial CurrentRelease)EXTernal TripBreaker trippedbecausephasecurrentexceeded11xratingplug currentlnValue11 3EXTTBreakertrippedduetoexternalcommunicationscontrolsignal-forexample5.8fromIMPACC'MGNDTGrouND-faultJrip-SBreakertrippedbecausegroundcurrent exceededGroundFaultprotectionsettingsPhasecurrenthasexceeded85%ofLong-TimeCurrentSettingformorethan 40seconds3839HILDHighLoaDAlarmALARM:NearingOverloadConditionApp'xBCasefINSTINStantaneousTripaTBreakertrippedinstantaneouslybecausephasecurrentexceededInstantaneousprotectionsettingPhasecurrenthas exceededLong-Timecurrentsetting.Tripunitistimingto tripbreaker.3.6Long-TimeDelay Pick-UpALARM:OverloadConditioninProgressLong-TimeDelayIripv4(OverloadTrip)NegativePOWerflowLDPU 3.2LDTBreakertrippedbecausephasecurrentexceededLong-TimeprotectionsettingsPower isflowinginto“load”side(bottom)ofbreaker,andoutfrom“line"side(top)ofthebreaker.Breakertrippedinstantaneouslybecausephase currentexceededshort-time ratingofcircuitbreakerValueofcurrentexceedsdisplay capability32,33NPOW1 21 3OverRIDeTripX.3ORID1.14QverRaNGeTrip£3.(Currenttoohightomeasure.)RatingPLUG Problem1.2.2ORNGRatingPlugis missing,damaged,ornotwellconnected.Ifbreakerisclosed,itwilltrip,andtheinstantaneous/overrideLEDwilllight.Ifbreaker isopen,itwill not close.Protection functionsstilloperate,butmaybeupto12%out-of-tolerance.Replacetripunitatfirstopportunity.BreakertrippedbecausephasecurrentexceededShort-TimeDelayprotectionsettingsBreakertrippedbecauseambienttemperatureofSURE+chipexceeded95degreesCAtriptestwillbeginassoonasyoureleasethepushto testbuttonand'‘TEST'messagewilldisappear. Thebreakerwilltrip,andthecause oftripisdisplayed.ANoTrip Unittestwillbeginassoon asyoureleasepushtotestbutton,andthedisplayshows theelapsedtimeoftest.1.3PLUG12 21Nonfatal memoryerrorROMERROR...34.3.5Short-TimeDelayTip*SDTOverTEMPeratureTrip 1.1TEMP40TESTandtripbreakerisreadytobeginTEST40Test(withouttrippingbreaker)isreadyto begin[blank]or14Controlpoweris notavailable,or wrongpotentialappliedTrip UnitdoesnotcalculateTHDvaluesbecauseofaprotectionrelatedactivity.Tripunitnot“ON"1 21 4AbortedTHDCalculationNOTES:1Inthecaseofahigh-levelfaultcondition,theTripUnit willoperatewheneveracompleteRMS currentvalue exceeds thetriplevel.Forthisreason,thedisplayed valuemaybelessthantheactualRMSfaultcurrent.2In thecaseofa veryhighfaultcurrent,themessage“ORNG”(indicatingoverrange)appearsbecausetheTripUnitcannotdisplay theactualvalueofthefaultcurrent.^OverRIDe(FixedInstantaneous)TripisfortypeLS and LSGTripUnits(noInstantaneous element),on circuitbreakerswhoseShort-Circuitcurrentinterruptingcapability exceeds theirShort-TimeCurrentwithstandcapability.(See Section1.1.4)4Thevaluesofthe currents displayed afteraTRIP event,arethevalues at thetimethe TRIPoperationwasinitiated.Althoughthemagnitudeofa faultcurrent,forexample,cancontinue toincreaseaftertheTRIPoperationisinitiated,thosevalues ofcurrentoccurring aftertheTRIPoperationisinitiated,arenotdisplayed.REVERSE FED IN APPLICATION.THEREFORE DONOTRELYUPONTHEVOLTAGE READOUT ASASOLE INDICATOR OF THEBREAKER’SOA//OFFSTA-TUS OR BREAKER’S VOLTAGE STATUS.£^CAUTIONWHEN THE CIRCUIT BREAKER’S CONTACTS AREOPEN IT MAY OR MAY NOT DISPLAY THEBREAKER’S PHASE TO PHASE VOLTAGES.THISDEPENDS ON THE TYPE BREAKER. THE TYPE DSBREAKERS PICK UP THE PT MODULE’SCONNEC-TIONS ON THETOP SIDE WHILE THE TYPES SPBAND RD BREAKERS PT MODULE IS CONNECTEDTO THE BOTTOM SIDE-SEE FIG 2.ASECOND FAC-TOR TO CONSIDER IS WHETHER THE BREAKER IS1.2.1.3Instrumentation - Power,Power Factorand Energy valuesThe Digitrip RMS 910Trip Unit displays power andenergy values.By using the circuit breaker currentsen-sors and an integrally mounted Potential TransformerModule shown in Fig. 6, power and energy values areF:T’NEffective May 1997