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Sentron Molded Case Circuit BreakersSeries Connected Short Circuit RatingsThe term “Series Connected ShortCircuit Rating” refers to the application ofseries circuit breakers in a combinationthat allows downstream breakers to havelower individual interrupting ratings thanthe available fault current.This is permitted as long as the seriescombination has been tested and certified by UL.The tables on these pages list specificmain and branch breaker combinationsthat may be used for the short circuitinterrupting ratings shown.240V Series RatingsTypeBranch BreakerMaximumAmperes TypeQPPH070 (1P)125 (2P)100 (3P)225 (2P)22,000Main BreakerNumberof Poles123Amperes15–7015–12515–100QE, BLE,QPF, BLF, QAF, BAF215–60QE, BLE, BE, QPF,BQF, BLF, QAF, BAF115–30QP, BQ, BLQPH, BQH,BLHQT1, 215–40QG, BG1, 215–30QP, BQ, BL1215–7015–125QE, BLE, BE, QPF,BQF, BLF, QAF, BAF115–30QE, BLE, BE,QPF, BLF, QAF, BAF215–60QPP2125–200QT1, 0 (2P)MOLDED CASECIRCUIT BREAKERSQE, QPF, QAF, BAFQJH242,000QJ2H225(2 & 3P)225(2 & 3P)070 (1P)HQP, HBQ, HBL 125 (2P)100 (3P)65,000HQPP6-146225 (2P)UL SeriesConnectedRatingTypeED4, ED6Branch BreakerMaximumNumberAmperes Typeof Poles AmperesQEH, BLEH, QE, QPHF,BLHF, BLE, QPF, BLF, 215–60QAFH, BAFH, QAF, BAF100 (1P)125 (2 & 3P)QT1, 2QPPH, QPP2125–200QP, BQ, BL,QPH, BQH, BLH12315–7015–12515–10065,000FD6-A, FXD6-A15–30QEH, BLEH, QE, QPHF,BLHF, BLE, QPF, BLF, 2QAFH, BAFH, QAF, BAF15–60ED21, 2, 315–100QT1, 215–40QP, BQ, BL,QPH, BQH, BLH12315–7015–12515–100250 (2 & 3P)QPF, QPHF, BLF, BLHF,1, 2QAF, QAHF, BAF, BAHF(Continued)15–40QPHF, BQHF, BLHF,QPF, BQF, BLF, QE,1QEH, BLEH, BE, BLE,QAFH, BAFH, QAF, BAF15–401QPQPMHNo substitutions are permitted. All combinations shown have been tested andare UL Listed. This information is provided as a reference tool only. For verification of specific combination ratingsconsult the UL RecognizedComponents Directory.240V Series Ratings (Continued)Main BreakerUL SeriesConnectedRatingGeneral15–60QJ2H, QJ2, QJH22, 3QPPH2125–22560–225QPH, BQH, BLH12315–7015–12515–100QT215–30QP, BQ, BL12315–7015–12560–100JXD2-A, JD6-A,JXD6-A, LD6-A,LXD6-AQJ2H, QJH22, 360–225QPF, BQF, BLF, BG, BLG,1QE, BE, BLE, QAF, BAF15–30QPF, BLF, BG, BLG,2QE, BE, BLE, QAF, BAF15–60HJD6-A, HJXD6-AHLD6-A, HLXD6-AHMD6, HMXD62000HND6, HNXD6(2 & 3P)HPD6, HPXD6HRD6, HRXD6QPH12315–7015–12515–100SJD6-A, SLD6-A,SMD6, SND6,1600SPD6(2 & 3P)QPH, BQH, BLH12315–7015–12515–100MD6, MXD6ND6, NXD6PD6, PXD6RD6, RXD6QPH, BQH, ��100QT1, 215, 20, 40QP, BQ, BL12315–7015–12560–100QPH, BQH,BLH12315–7015–12515–100600 (2 & 3P)2000(2 & 3P)QJH22, 360–225QP, BQ, BL,QPH, BQH, BLH12315–7015–12515–100QP, BQ, BL,QPH, BQH, BLH,HQP, HBQ, HBLQPF, BQF, BLF, BE,QPHF, BQHF, BLHF,1QEH, BLEH, QE, BLE,QAFH, BAFH, QAF, BAF15–30QEH, BLEH, QE, BE,QPHF, BQHF, BLHF,1QPF, BLF, BQF, BLE,QAFH, BAFH, QAF, BAF15–30QEH, BLEH, QE, QPHF,BLHF, BLE, QPF, BLF,2QAFH, BAFH, QAF, BAF15–60125 (2 & 3P) QEH, BLEH, QPHF, QE,BLHF, QPF, BLF, BLE,2QAFH, BAFH, QAF, BAF15–60HED4, HED6100,000QT1, 215–40ED21, 2, 315–100QG, BG1, 215–30ED4115–100QP, BQ, BL,QPH, BQH, BLH1215–7015–125ED4, ED62, 315–125QT1, 215–40ED2, ED4115–100QPF, BQF, BLF, QPHF,BQHF, BLHF, QEH,1BLEH, QE, BLE, BE,QAFH, BAFH, QAF, BAF15–30HED4Siemens Power Distribution & Control, SPEEDFAX 2007-2008 Product Catalog100 (1P)
Sentron Molded Case Circuit BreakersSeries Connected Short Circuit RatingsGeneral240V Series Ratings (Continued)UL Series Main BreakerConnectedRatingTypeHQPPHBranch BreakerMaximumAmperes TypeQP, BQ, BL,QPH, BQH, BLH,HQP, HBQ, HBLHQPP, QPPH, QPP225 (2P)1215–7015–1252125–225FD6-A FXD6-A2, 370–250JD6-A, JXD6-A,JXD2-A, SJD6-A2, 3200–400LD6-A2, 3200–600LXD6-A2, 3450–600SLD6-A3300–600ED4115–100ED4, ED62,315–125FD6-A, FXD6-A2, 370–250JD6-A, JXD6-A,JXD2-A, SJD6-A2, T1, 215–40115–2535–70215–2535–125LD6-A2, 3LXD6-A2, 12515–100ED4115–100ED4, ED62, 315–125FD6-A, FXD6-A2, 370–250JD6-A, JXD6-A,JXD2-A, SJD6-A2, 3200–400LD6-A2, 3200–600LXD6-A2, 3450–600SLD6-A3300–600225 (2 & 3P)QEH, BLEH, QE, BE,QPHF, BQHF, BLHF,1QPF, BQF, BLF, BLE,QAFH, BAFH, QAF, BAF15–30QEH, BLEH, QPHF, BLE,BLHF, QE, QPF, BLF,2QAFH, BAFH, QAF, BAF15–60QT115–50QP, BQ, BL,QPH, BQH, BLH,HQP, HBQ, HBL12315–7015–12515–100QPF, BLF, BLE, BLEH,250 (2 & 3P) QPHF, BLHF, QEH, QE, 2QAFH, BAFH, QAF, BAFSHLD6-AHMD6,HMXD6600 (3P)800 (2 & 3P)MD6, MXD6 SMD6 2,3100,000(Continued)SHMD6800 (3P)15–30115–100ED4, ED62, 315–125FD6-A, FXD6-A2, 370–250JD6-A, JXD6-A,JXD2-A, SJD6-A2, 3200–400LD6-A2, 3200–600LXD6-A2, 3450–600SLD6-A3300–600MD6, MXD6, SMD6 2, 100ED4, ED62, 315–125ED4, ED62, 315–125FD6-A, FXD6-A2, 370–250FD6-A, FXD6-A2, 370–2502, 3200–400QJ2, QJH2, QJ2H2, 360–225JD6-A, JXD6-A,JXD2-A, SJD6-AHQPP, QPPH, QPP2125–225HND6, HNXD6,SHND61200 (2 & 3P)LD6-A2, 3200–600LXD6-A2, 3450–600SLD6-A3300–600QT1, 215–40ED4115–100ED4, ED62, 315–1252, 370–250JD6-A, JXD6-A,JXD2-A, SJD6-A2, 3200–400ED4115–100ED4, ED62, 315–125FD6-A, FXD6-A2, 370–250JD6-A, JXD6-A,JXD2-A, SJD6-A2, 3200–400LD6-A2, 3200–600MD6, MXD6, SMD6 2, 3LXD6-A2, 3450–600ND6, NXD6, SND62, 3500–1200SLD6-A3300–600PD6, PXD6, SPD62, 31200–1600400 (2 & 3P) FD6-A, FXD6-A600 (2 & 3P)Numberof Poles12, 3HPD6, HPXD6,SHPD1600 (3P)MD6, MXD6, SMD6 2, 3500–800ND6, NXD6, SND62, 3500–1200ED4115–100ED4, ED62, 315–125FD6-A, FXD6-A2, 370–250JD6-A, JXD6-A,JXD2-A, SJD6-A2, 3200–400LD6-A2, 3200–600LXD6-A2, 3450–600SLD6-A3300–600Siemens Power Distribution & Control, SPEEDFAX 2007-2008 Product Catalog500–8006-147MOLDED CASECIRCUIT BREAKERSHLD6-A600 (2 & 3P)TypeED4ED4, ED66HJD6-A,HJXD6-A,SHJD6-AHLXD6-ABranch BreakerMaximumAmperesQE, QEH, BLEH, QPHF,BLHF, QPF, BLF, BLE, 2QAFH, BAFH, QAF, BAFQE, BE, BLE, QPHF,BQHF, BLHF, QPF, BQF, 1BLF, QEH, BLEH, BAF,QAFH, BAFH, QAFHFD6, HFXD6Main BreakerUL SeriesConnectedTypeRating15–30QPH, BQH, BLH,HQP, HBQ, HBL100,000(Continued)Numberof Poles AmperesQEH, BLEH, QE, BE,QPHF, BQHF, BLHF,1QPF, BQF, BLF, BLE,QAFH, BAFH, QAF, BAFQP, BQ, BLHQJ2H240V Series Ratings (Continued)
Sentron Molded Case Circuit BreakersSeries Connected Short Circuit RatingsGeneral240V Series Ratings (Continued)UL Series Main BreakerConnectedRatingTypeBranch BreakerMaximumAmperesTypeED4P1ED4, ED62, 3FD6-A, FXD6-A2, 3JD6-A, JXD6-A,JXD2-A, SJD6-A100,000HRD6, HRXD6(Continued)2000 (3P)125 (2 & 3P)6MOLDED CASECIRCUIT BREAKERS250 (2 & 3P)HHJD6, HHJXD6,600 (2 & 3P)HHLD6, HHLXD6CJD6-A6-148400 (2 & 3P)Branch BreakerMaximumAmperes15–125TypeQPH, BQH, BLH,HQP, HBQ, HBLP2370–250ED4, ED62, 315–252, 370–2502, 3200–400200–400CLD6-AFD6-A, FXD6-A,600 (2 & 3P) HFD6, HFXD6Amperes100–125100LD6-A2, 3200–6002, 3450–600SLD6-A3300–600LD6-A, HLD6-A2, 3200–600MD6, MXD6, SMD62, 3500–800LXD6-A, HJXD6-A2, 3450–60015–30ND6, NXD6, SND62, 3500–1200QT1, 2PD6, PXD6, SPD62, 31200–1600ED4, ED61RD6, RXD62, 31600–2000QP, BQ, BL,QPH, BQH, BLH,HQP, HBQ, HBL123ED4, ED6,HED4, HED6115–7015–12515–100FD6-A, FXD6-A,HFD6, HFXD615–30CMD6JXD2-A, JD6-A,JXD6-A, HJD6-A,800 (2 & 3P) HJXD6-A2, 31515–1252, 370–2502, 3200–400QEH, BLEH, QAFH, QE,QPHF, BLHF, QPF, BLE, 2BLF, BAFH, QAF, BAFLD6-A, HLD6-A2, 3200–60015–60LXD6-A, HLXD6-A2, 3450–600500–800115–100MD6, MXD6,HMD6, HMXD62, 3ED4, HED4ED4, ED6,HED4, HED62, 315–125MD6, MXD6,HMD6, HMXD62, 3500–80015–40ED4, ED611515–7015–12515–100ED4, ED6,HED4, HED62, 315–125FD6-A, FXD6-A,HFD6, HFXD62, 370–2502, 3200–400QP, BQ, BL,QPH, BQH, BLH,HQP, HBQ, HBLCFD6UL Series Main BreakerConnectedRatingTypeLXD6-AQT200,0002, 3Amperes15–100JXD2-A, JD6-A,JXD6-A, HJD6-A,HJXD6-AQPHF, BQHF, BLHF,QPF, BQF, BLF, QEH,QE, BE, BLEH, QAFH,BLE, BAFH, QAF, BAFCED6240V Series Ratings (Continued)1, 2123SCMD6800 (3P)QPHF, BQHF, BLHF,QE, BE, BLE,1QPF, BQF, BLF,QEH, BLEH, QAF, BAF15–30QPHF, BLHF, QE,BLE, QPF, BLF,2QEH, BLEH, QAF, BAFLD6-A, HLD6-A2, 3200–60015–60LXD6-A, HLXD6-A2, 3450–600ED21, 2, 315–100MD6, MXD6,HMD6, HMXD62, 3500–800HED4, ED4115–100ED4, ED6,HED4, HED62, 3500–12002, 315–125ND6, NXD6, SND6,HND6, HNXD6FD6-A, FXD6-A,HFD6, HFXD62, 370–250MD6, HMD6,HMXD6, MXD6,SHMD6, SMD62, 3500–800ND6, HND6,SHND6, NXD6,HNXD6, SND62, 3500–1200FD6-A, FXD6-A,HFD6, HFXD62, 370–250JXD2-A, JD6-A,JXD6-A, HJD6-A,HJXD6-A2, 3200–400QJ2H, QJH2, QJ22, 3QPPH, QPP2200,00060–225CND6-ASCND6JXD2-A, JD6-A,JXD6-A, HJD6-A,1200 (2 & 3P) HJXD6-A1200 (3P)125–225QT1, 215–40FD6-A, FXD6-A,HFD6, HFXD62, 370–250QPH, BQH, BLH,HQP, HBQ, HBL23ED4, ED62, 315–125FD6-A, FXDG-A,HFD6, HFXD62, 370–250JXD2-A, JD6-A,JXD6-A, HJD6-A,HJXD6-A2, 3200–400QT1, 215–30100–125–100CPD6Siemens Power Distribution & Control, SPEEDFAX 2007-2008 Product Catalog1600 (3P)LD6-A, HLD6-A2, 3200–600LXD6-A, HLXD6-A2, 3450–600MD6, MXD6,HMD6, HMXD62, 3500–800ND6, NXD6, SND6,HND6, HNXD62, 3500–1200
Sentron Molded Case Circuit BreakersSeries Connected Short Circuit RatingsGeneral480V Series Ratings480V Series Ratings (Continued)UL Series Main of Poles18,000ED4125 (2 & 3P)BQD, CQD1, 2, 315–10025,000ED6125 (2 & 3P)BQD, CQD1, 2, 315–100BQD, CQD1, 2, 315–100ED4115–100ED4, ED62, 315–125BQD, CQD1, 2, 315–10030,00042,000HED6HED4Branch Breaker125 (2 & 3P)125 (2 & 3P)HJD6-A, HJXD6-A,HLD6-A,600 (2 & 3P)HLXD6-AMD6, MXD6,ND6, NXD6SMD6, SND6,1200 (2 & 3P)1600 (3P)SPD650,000ED4115–100ED4, ED62, 315–125HED42, 315–50FD6-A, FXD6-A2, 370–250JD6-A, JXD6-A,SJD6-A2, 3200–400HJD6-A,HJXD6-AHLD6-A,HLXD6-A250 (2 & 3P)HMD6, HMXD6HND6, HNXD6햲2, 370–250JD6-A, JXD6-A2, 3200–400LD6-A2, 3200–600LXD6-A2, 3450–60012, 315–10015–30115–100BQD, CQD햲ED4, ED6,HHJXD6, HHJD6,HHLD6,600 (2 & 3P) HED4HHLXD6HFD6, HFXD6100,000CMD6800 (3P)Amperes2, 370–250FD6-A, FXD6-A,HFD6, HFXD62, 370–250JD6-A, HJD6-A,JXD6-A, HJXD6-A2, 3200–400LD6-A, HLD6-A2, 3200–6002, 3450–6002, 3200–6002, 3450–600500–8003400–600MD6, MXD6,HMD6, HMXD62, 3SLD6-AJD6-A, JXD6-A2, 3200–400HFD6, HFXD62, 370–250FD6-A, FXD6-A,HFD6, HFXD62, 370–250JD6-A, HJD6-A,JXD6-A, HJXD6-A2, 3200–400LD6-A2, 3200–600LXD6-A2, 3450–600SLD6-A3400–6002, 32, 3200–400LD6-A2, 3200–600LXD6-A2, 3450–600SLD6-A3400–600FD6-A, FXD6-A2, 370–250JD6-A, JXD6-A,SJD6-A2, 3200–400LD6-A2, 3200–600LXD6-A2, 3450–600SLD6-A3400–600BQD, CQD1, 2, 315–100ED4, HED4115–100ED4, ED6,HED42, 315–125HED4, ED4115–1002, 370–250200–400ED4, HED4115–100FD6-A, FXD6-A2, 370–250600 (2 & 3P) JD6-A, JXD6-A2, 3200–400LD6-A2, 3200–600LXD6-A2, 3450–600FD6-A, FXD6-A2, 370–250CPD6CJD6-A150,0001200 (3P)1200 (3P)1600 (3P)400 (2 & 3P)LD6-A, HLD6-A2, 3200–600LXD6-A, HLXD6-A2, 3450–600MD6, MXD6,HMD6, HMXD62, 3500–800ND6, NXD6,HND6, HNXD62, 3500–1200FD6-A, FXD6-A,HFD6, HFXD62, 370–250ED4115–100HFD6, HFXD62, 370–250JD6-A, HJD6-A,JXD6-A, HJXD6-A2, 3200–400ED4115–100HFD6, HFXD62, 370–2502, 3200–400JD6-A, HJD6-A,600 (2 & 3P)JXD6-A, HJXD6-ALD6-A, HLD6-A2, 3200–600LXD6-A, HLXD6-A2, 3450–60012, 315–10020–30BQD, CQDCED6200,000햲125 (2 & 3P) ED4, HED4115–100ED4, ED6,HED42, 315–125BQD, CQD12, 315–10020–302,315–50115–100HED42, 315–125FD6-A, FXD6-A,HFD6, HFXD62, 370–250Siemens Power Distribution & Control, SPEEDFAX 2007-2008 Product Catalog6-149JD6-A, JXD6-A2, 3200–400LD6-A2, 3200–600LXD6-A2, 3450–600FD6-A, FXD6-A2, 370–250JD6-A, JXD6-A2, 3200–4002, 3200–6002, 3450–600MD6, MXD6, SMD6 2, 3500–80014–1600 (3P) FD6-A, FXD6-ACND6CLD6-A2, 31200 (2 & 3P) LD6-ASCMD, SCND670–250JD6-A, JXD6-A,SJD6-ALXD6-AHPD6, HPXD6250 (2 & 3P)FD6-A, FXD6-ALD6-AJD6-A, JXD6-A800 (2 & 3P)CFD618–2000 (3P)Numberof PolesLXD6-A400 (2 & 3P) FD6-A, FXD6-A65,00065,000HRD6, HRXD6(Continued)Type2, 3CFD6ED4, ED6250 (2 & 3P) ED4, HED470–250BQD & CQD breakers (2, 3P) are series ratedfrom 15–100A for Series 7A, S2, S3, and P1panelboard applications only.MOLDED CASECIRCUIT BREAKERSHFD6, HFXD618–2000 (3P)TypeBranch BreakerMaximumAmperes6RD6, RXD61600 (3P)Main BreakerLXD6-A, HLXD6-A14–1600 (3P) FD6-A, FXD6-APD6, PXD6AmperesUL SeriesConnectedRating
Sentron Molded Case Circuit BreakersSeries Connected Short Circuit RatingsGeneral240 Volt Fuse Series RatingsMain BreakerUL SeriesConnectedMaximumRatingType Amperes65,000J, RT15–600 (1, 2, 3P)15–1200 (1, 2, 3P)L601–6000 (1, 2, 3P)T(300V)15–200 (1, 2, 3P)15–600 (1, 2, 3P)6MOLDED CASECIRCUIT BREAKERSTQPH, BQH, BLHQPH, BQH, BLH1, 2, 31, 2, 3QPH, BQH, BLH1, 2, 315–125QP, BQ, BL1, 2, 315–125HQP, HBQ, HBL,QPH, BQH, BLH315–100T200,0002, 370–25070–250MD6, MXD6,HMD6, HMXD62, 3500–800ND6, NXD6,HND6, HNXD62, 3500–1200TypeNumberof PolesAmperes60–400 (1, 2, 3P)ED4160–10015–400 (2, 3P)ED42, 315–100J15–400 (1, 2, 3P)ED4115–50T, J70–600 (2, 3P)FD6-A, FXD6-A2, 370–250J, R70–600 (2, 3P)HFD6, HFXD62, 370–250JD6-A, JXD6-AHJD6-A, HJXD6-A2, 3200–400LD6-A, HLD6-A2, 3200–600LXD6-A, HLXD6-A2, 3450–600601–6000 (2, 3P)QEH, BLEH, QE, QPF,QPHF, BLHF, BLE, BLF, 2QAFH, BAFH, QAF, BAF15–60Main BreakerUL SeriesMaximumConnectedRatingType AmperesQT1, 215–50QPH, BQH, BLH,HQP, HBQ, HBL1, 215–125ED4, ED6,HED42, 315–12570–600 (2, 3P)FD6-A, FXD6-A2, 370–250200–600 (2, 3P)JD6-A, JXD6-A,JXD2-A, SJD6-A2, 3200–400JT, J,R200–600 (2, 3P)T70–1200 (2, 3P)450–600 (2, 3P)HFD6, HFXD62, 370–2502, 3200–400LD6-A, HLD6-A2, 3200–600LXD6-A, HLXD6-A2, 3450–60015–125HFD6, HFXD62, 370–2502, 370–2502, 3500–800LXD6-A2, 3450–600MD6, MXD6,HMD6, HMXD6JD6-A, JXD6-A,JXD2-A, SJD6-A2, 3200–400ND6, NXD6,HND6, HNXD62, 3500–1200LD6-A2, 3200–600BQD, CQD1SLD6-A3300–600BQD, CQD 햲2, 320–30ED4, HED4115–100BQD, CQD115–100ED4, ED6,HED4BQD, CQD 햲2, 320–302, 315–1252, 3200–600SLD6-A3300–600450–600 (2, 3P)LXD6-A2, 3450–60015–1200 (2, 3P)ED4, HED4115–100ED4, ED6,HED42, 370–1200 (2, 3P)FXD6-A, FD6-A450–1200 (2, 3P)200–1200 (2, 3P)FD6-A, FXD6-A2, 370–250JD6-A, JXD6-A,JXD2-A, SJD6-A2, 3200–400LD6-A2, 3200–600LXD6-A2, �1200PD6, PXD6, SPD631200–16001600–2000RD6, RXD63125–200 (2, 3P)QJH2, QJ2H, QJ22, 3125–200T, J125–600 (2, 3P)QJH2, QJ2H2, 3125–225125–400 (2, 3P)QJ22, 3125–22570–600 (2, 3P)HFD6, HFXD62, 370–250T, LLR601–1200 (2, 3P)601–6000 (2, 3P)15–100 (1, 2, 3P)200,000T, J15–200 (1, 2, 3P)BQD & CQD breakers are series rated from 15–100A forSeries 7A, S2, S3, and P1 panelboard applications only.6-150Branch BreakerJD6-A, JXD6-AHJD6-A, HJXD6-ALD6-A300–600 (3P)100,000Numberof Poles Amperes2, 3480 Volt Fuse Series Ratings15–100TypeHFD6, HFXD615–3050,000Branch BreakerHFD6, HFXD6L70–1200 (2, 3P)QPF, BQF, BLF, QPHF,QE, BE, BLE, QEH,1BLEH, BLHF, BQHF,QAFH, BAFH, QAF, BAFRJ, RMain BreakerUL SeriesConnectedMaximumRatingType Amperes15–12515–1251601–6000 (2, 3P)200,000햲TypeNumberof Poles AmperesED4, HED4300–1200 (3P)LBranch Breaker15–600 (2, 3P)J, R100,000240 Volt Series Ratings (Continued)Siemens Power Distribution & Control, SPEEDFAX 2007-2008 Product Catalog15–100
Molded Case Circuit BreakersUnusual Operating ConditionsReferenceNote: The information provided on this and the next page is intended for reference and recommendation only. Because severalvariables can act on a circuit breaker’s performance at the same time, the data below is based less on controlled testing,than on experience and engineering judgment. Contact Siemens for further information on special conditions and treatment.Table 1 — Temperature Derating Data for Thermal-Magnetic BreakersAmpere Rating at:25 C50 C(77 F)(122 60 C(140 49082510001148132014851650Siemens Breaker tude in Feet (Meters)13,000 (4,000)12,000 (3,675)11,000 (3,350)10,000 (3,000)9,000 (2,750)8,000 (2,400)7,000 (2,100)6,000 (1,800)1.0.95.90.85.80.75Rating Correction FactorFigure 1 — Altitude AdjustmentSiemens Power Distribution & Control, SPEEDFAX 2007-2008 Product Catalog6-151MOLDED CASECIRCUIT BREAKERSReferenceAmpereRating at40 C (104 001000120014001600180020006High Ambient TemperaturesBecause thermal-magnetic trip breakersare temperature sensitive and calibratedfor a specific ambient of 40 C (104 F)(average enclosure temperature), ahigher ambient will cause the breaker totrip at lower current than its nameplaterating, in other words, causing thebreaker to “derate” (see Table 1).Similarly, the current carrying capacityof a circuit conductor is based upon acertain ambient temperature, a higherambient will reduce its current carryingcapacity, causing it to “derate.” Thus,with a fluctuating temperature, athermal-magnetic breaker will deratenearly parallel with its connected circuitconductors and maintain close circuitprotection. If the application temperatureexceeds 40 C (104 F) and is known,either a breaker specially calibrated forthe higher ambient or one oversizedaccording to Table 1 may be selected.In a case such as this, the circuitconductors should be oversized as well.Siemens Sensitrip III and Type SBEncased Systems Breakers areinsensitive to temperature changes.However, they do include circuitry toprotect the components fromabnormally high temperatures.Moisture — CorrosionFor atmospheres having high moisturecontent and / or where fungus growth isprevalent, a special preventive treatmentmay be required.Where the air is heavily laden withcorrosive elements, breakers madewith special corrosion-resistantfinishes may be required.AltitudeReduced air density at altitudes greaterthan 6600 ft. (2000 meters) affects theability of a molded case circuit breakerto transfer heat and interrupt faults.Therefore, circuit breakers applied atthese altitudes should have interrupting,insulation and continuous currentsderated as indicated in Figure 1.
Molded Case Circuit BreakersUnusual Operating Conditions400 HzReferenceSystems 햲Siemens molded case circuit breakerscan be applied for overcurrent protectionon 400Hz systems, commonly used topower computer installations, aircraft,military and other specialty equipment.Below are basic guidelines.Circuit Breaker Derating RequiredThis table lists the maximum continuouscurrent carrying capacity for Siemensbreakers at 400Hz. Due to the increasedresistance of the copper sectionsresulting from the skin effect producedby eddy currents at these frequencies,circuit breakers in many cases requirederating. The thermal derating on thesedevices is based upon 100%,three phase application in open air in amaximum of 40 C (104 F) with 48 in.(1219 mm) of the specified cable or busat the line and load side. Additionalderating of not less than 20% will berequired if the circuit breaker is to beutilized in an enclosure. Further deratingmay be required if the enclosureambient temperature exceeds 40 C(104 F).Cable and Bus SizingThe cable and bus sizes to be utilizedat 400Hz are not based on standardNational Electric Codes tables for 60Hzapplication. Larger cross sections arenecessary at 400Hz. All bus barsspecified are based upon mountingthe bars in the vertical plane to allowmaximum air flow. All bus bars arespaced at a minimum of 0.25 in. (6 mm)apart. Mounting of bus bars in thehorizontal plane will necessitateadditional drafting. Edgewise orientationof the bus may change the maximumratings indicated. If additional informationis required for other connections of cableor bus, contact Siemens for information.Application RecommendationsIt is recommended that temperatures bemeasured on the line and load terminalsor T-connectors of the center pole. Theseare usually the hottest terminals with abalanced load. A maximum temperatureof 75 C (35 C over a maximum ambientof 40 C) would verify the particularapplication. Temperature profiles takenon these breakers can be correlated toensure that the hottest points withinthe breaker are within the requiredtemperature limits.Factory ConfigurationWhen required, molded case circuitbreakers may be factory calibrated for400Hz application. These breakers arespecially labeled for 400Hz usage andtheir nameplate current rating willinclude the necessary derating factory.The highest “Maximum ContinuousAmperes” rating at 400Hz, found in thetable below approximates the highestspecially calibrated 400Hz nameplateampere rating available for a givenframe size. Contact Siemens forordering information on otherbreakers applied in 400Hz systems.400Hz BreakersMOLDED CASECIRCUIT BREAKERS6SiemensBreakerTypeED2, ED4, ED6,BQD, HED4,HED6, CED6QJ2, QJH2,QJ2H, HQJ2HFD6, FXD6,HFD6, HFXD6,CFD6JXD2, JD6,JXD6, HJD6,HJXD6, HHJD6,HHJXD6, CJD6JD6, JXD6,HJD6, HJXD6100% Rated햲 TheMaximum Continuous Ampere RatingAt 40 C (104 F) 햳60HZ400HZEnclosedOpen AirOpen Air 햴After information provided on this page is intended forreference and recommendation only. Because severalvariables can act on a circuit breaker’s performance atthe same time, the data above is based less on6-15275 C (167 F)CopperCable per PoleNo #4/01250 kcmil1#3/01#4/01250 kcmil1350 kcmil1500 kcmil2#3/02#3/02#4/01250 kcmil1350 kcmil1500 kcmil2#3/0SiemensBreakerTypeLD6, LXD6,HLD6, HLXD6,HHLD6,HHLXD6,CLD6LD6, LXD6,HLD6, HLXD6,100% RatedMD6, MXD6,HMD6,HMXD6, CMD6MD6, MXD6,HMD6,HMXD6, CMD6100% RatedND6, NXD6HND6, HNXD6,CND6ND6, NXD6HND6, HNXD6,CND6100% RatedPD6, PXD6,HPD6, HPXD6,CPD6,PD6, PXD6,HPD6, HPXD6,CPD6100% RatedRD6, RXD6,HRD6, HRXD680% RatedMaximum Continuous Ampere RatingAt 40 C (104 F) 햳60HZ400/415HZEnclosedOpen AirOpen Air 햴After 07681800108086420001200960controlled testing, than on experience and engineeringjudgment. Contact Siemens for further information onspecial conditions and treatment.햳 Additional derating may be required if the ambientSiemens Power Distribution & Control, SPEEDFAX 2007-2008 Product Catalog75 C (167 F)CopperCable per PoleNo ofWirePiecesSize1250 kcmil1350 kcmil1500 kcmil2#3/02#4/02250 kcmil2350 kcmil1250 kcmil1350 kcmil1500 kcmil2#3/02#4/02250 kcmil2350 kcmil2250 kcmil2350 kcmil3250 kcmil3300 kcmil2250 kcmil2350 kcmil3250 kcmil3300 kcmil3300 kcmil3350 kcmil3400 kcmil4350 kcmil3350 kcmil3400 kcmil4350 kcmil4400 kcmil4500 kcmil5500 kcmil4400 kcmil4500 kcmil5500 kcmil5500 kcmil5500 kcmil6500 kcmiltemperature is greater than 40 C (104 F).after derating to compensate for the heatingof the copper conductor, caused by the skin effectgenerated by eddy currents produced at 400/415HZ.햴 Calculated
Molded Case Circuit BreakersIEC 947-2 AC Interrupting Ratings, 50/60 HZ A)HLD6(A)HLXD6(A)HHLD6(A)HHLXD6CLD6SLD6(A) 햳SHLD6(A) 햳SCLD6 40 �6565100100380/415 0040406565100——40406565500 4242Siemens Power Distribution & Control, SPEEDFAX 2007-2008 Product CatalogIcs51010212133331515212133 b33 b—1521—1515212133 b33 388111117——881111MOLDED CASECIRCUIT 6-153
Molded Case Circuit BreakersTypical SpecificationsReferenceGeneral SpecificationsMolded case circuit breakers shall provide circuit overcurrent protection withinverse time and instantaneous tripping characteristics and shall be SiemensSentron, Sensitrip or approved equal.All circuit breakers shall be listed by Underwriters’ Laboratories, Inc., conformto applicable requirements of NEMA Standard Publication No. AB1 and meetappropriate classifications of Federal Specifications W C 375B/Gen.All circuit breakers shall have a quick-make, quick-break over center toggle typemechanism and the handle mechanism shall be trip free to prevent holding contactsclosed against a short circuit or sustained overload. All circuit breaker handles shallassume a position between “ON” and “OFF when tripped automatically. Multi-polecircuit breakers shall be common-trip such that an overload or short circuit on anyone pole will result in all poles opening simultaneously. Arc extinction is to beaccomplished by magnetic arc chutes. All ratings are to be clearly visible. Whenreverse feed is indicated on the drawings, in accordance with UL, circuit breakerswith sealed trip units shall be supplied.MOLDED CASECIRCUIT BREAKERS6Thermal Magnetic SpecificationsUnless otherwise noted on the drawings, all Circuit breakers 2000 Ampereand below shall have thermal-magnetic trip units, with inverse time-currentcharacteristics. Automatic operation of these circuit breakers shall be obtained bymeans of thermal-magnetic tripping devices located in each pole providing inversetime delay and instantaneous circuit protection. Circuit breakers shall be ambientcompensating in that, as the ambient temperature increases over 40 C, the circuitbreaker automatically derates itself so as to better protect its associated conductor.Thermal magnetic breakers from 250 to 2000A frames shall have thermalinterchangeable trip units, with instantaneous magnetic trip settings that areadjustable and accessible from the front of all circuit breakers on frame sizes 250Amperes and above. Where indicated, provide circuit breakers UL listed forapplication at 100% of their continuous ampere rating in their intended enclosure.Motor Circuit ProtectorsWhere indicated on the drawings and in the combination motor starter/motorcontrol center schedule, furnish instantaneous magnetic trip only circuit breakersfor motor short circuit protection. The magnetic trips shall be adjustable andaccessible from the front of all circuit breakers frames. The continuous currentrating shall be between 1 and 800 Amperes as indicated on the drawing.Solid State Sensing SpecificationsAs indicated on the drawings, circuit breaker frames400 Ampere through 3200-Ampere shall havemicroprocessor-based RMS sensing trip units, withthe capability to measure through to the 21st harmonic.Automatic operation of all circuit breaker frames 400Aand larger shall be obtained by means of solid statetripping elements providing inverse time delay and(instantaneous) and/or (short-time delay) circuitprotection. Continuous current ratings shall be adjustablefrom 20% to 100% of the trip unit rating, without the needfor a rating plug. Long-time delay and instantaneous tripshall be adjustable. The optional short-time trip functionshall have adjustable pick-up settings, three fixed times,and I2t ramp. Circuit breaker frames 400A and larger, andwhere indicated on the drawings, shall be 100% equipment rated.Integral GroundFault OptionMain and feeder circuit breakers, as indicated on thedrawings, shall be provided with integral ground faultprotection. Ground fault pick-up shall be adjustable from20% to 70% of the circuit breakers maximum continuouscurrent rating. Ground fault time delay shall be adjustablewith three 12t ramps.Metering OptionWhen indicated on the drawings, solid state trip breakersshall be furnished with a plug-in or panel mountedmetering device. This device shall simultaneously displayall three phase currents, as well as average current,ground current, and phase unbalance. In addition it shalldisplay breaker status, a max log, and a trip log. The triplog will retain and display date, time and type of trip(overload, short circuit or ground fault) for the mostrecent 5 trip events.Current Limiting SpecificationsThe interrupting rating of the circuit breakers shall be as indicated in thespecifications, and shown on the drawing or single line diagram. The interruptingrating of the circuit breakers shall be at least equal to the available short circuitcurrent at the line terminals of the circuit breaker and correspond to the UL listedintegrated short circuit current rating specified.Internal AccessoriesProvide shunt trips, bell alarms, and auxiliary switches as shown on the contractdrawings. Gold plated auxiliary switches shall be supplied for PLC connection. Internalaccessories for all breakers shall be UL listed for field installation and modification.Where indicated on the drawings, Siemens currentlimiting circuit breakers are to be furnished. Currentlimiting circuit breakers shall limit the let-through I2t to avalue less than the I2t of one-half cycle wave of thesymmetrical prospective current without any fusibleelements when operating within its current range.Series Connected Combination SpecificationsWhere protective devices are applied in series combination,such that the prospective available fault current exceedsthe interrupting rating (AIR) of the downstream protectivedevices, such combinations shal
Sentron Molded Case Circuit Breakers Series Connected Short Circuit Ratings General UL Series Main Breaker Branch Breaker Connected Maximum Number Rating Type Amperes Type of Poles Amperes QP, BQ, BL, 1 15-70 QPH, BQH, BLH, 2 15-125 HQP, HBQ, HBL HQPP, QPPH, QPP 2 125-225 QEH, BLEH, QE, BE, HQPPH 225 (2P) QPHF, BQHF, BLHF, 1 15-30 QPF .
