Eaton Cutler-Hammer RMS 510 Instructions Manual

Also see for Cutler-Hammer Digitrip RMS 510: Instructions Instructional Leaflet Instruction leaflet

I.L. 29-885B Page 9TABLE 1 - GROUND FAULT CURRENT SETTINGSr,I'-H n Available Settingsi i GROUND FAULT CURRENT SETTINGS(AMPERES)/,I* ti 2, 2.5,3, 4.5, 6,M„ M2In Multiples ofRating PlugAmperes (ln)IISetting Inst.jTjxIn A B C D E F H KI 100 25 30 35 40 50 60 75 100200 50 60 70 80 100 120 150 2000 250 63 75 88 100 125 150 188 250300 75 90 105 120 150 180 225 300M1 and M2 Values are Specified on Rating Plug C/3 400 100 120 140 160 200 240 300 400LUa: 600 150 180 210 240 300 360 450 600LUFig. 4.5 Instantaneous Current SettingsNote: For Testing Purposes Only: When using anexternal single phase current source to test low levelground fault current settings, it is advisable to usethe Auxiliary Power Module (APM) (See Fig. 7). Espe-cially when the single phase current is low, withoutthe APM it may appear as if the trip unit does notrespond until the current is well above the set value,leading the tester to believe there is an error in thetrip unit when there is none. The reason this occursis that the single phase test current is not a goodsimulation of the normal three phase circuit. If threephase current had been flowing, the trip unit wouldactually have performed correctly. Use the APM forcorrect trip unit performance whenever single phasetests are made.Q_ 630 158 189 221 252 315 378 473 630< 800 200 240 280 320 400 480 600 800O 1000 250 300 350 400 500 600 750 1000z> 1200 300 360 420 480 600 720 900 1200CLO 1250 312 375 438 500 625 750 938 1200ZF 1600 400 480 560 640 800 960 1200 1200<DC 2000 500 600 700 800 1000 1200 1200 1200o 2400 600 720 840 960 1200 1200 1200 1200LU2500 625 750 875 1000 1200 1200 1200 1200< 3000/3150 750 900 1050 1200 1200 1200 1200 1200cnz 3200 800 960 1120 1200 1200 1200 1200 12004000 1000 1200 1200 1200 1200 1200 1200 12005000 1200 1200 1200 1200 1200 1200 1200 1200l Tolerances on settings are ±10% of values shown,i Refer to Type DS, type SPB or Series C R-Frame supplemental instructionleaflets given in Section 9 for list of available rating plugs for each type circuitbreaker.4.9 Ground Fault Time Delay SettingAs illustrated in Fig. 4.7, there are two different GroundFault curve shapes, i.e., fixed time (flat) or l2t response.The shape selected depends on the type of selectivecoordination chosen. The l2t response will provide alonger time delay in the low-end of the ground fault cur-rent range than will the flat response.Five flat (.1, .2, .3, .4, .5 sec.) and three l2t (.1*, .3*, .5*sec.) response time delay settings are available. The l2tresponse settings are identified by the suffix asterisk (*)that appears in the setting viewing window. The l2tresponse is applicable to currents less than 0.625 timesthe ampere rating of the installed rating plug (ln). For cur-rents greater than 0.625 x ln the l2t response reverts tothe flat response.Available SettingsGnd-FaultSetting[E] xln A,B, C, D,E. F, H, K© Specific ValuesGiven on CircuitBreaker Time-CurrentCurve and in Table 1L/'v’Fig. 4.6 Ground Fault Current SettingsFAT'NEffective May 1997