5-9-00 sb00055 rev. a e-rated medium voltage fuses ecl155 for transformer and feeder protection 15.5 kv form no. ecl155 page 1 of 4 bif doc. #9004 bussmann catalog symbol: ecl155 e-rated medium voltage fuses: meets e requirements per ansi c37.46 meets general purpose requirements per ansi c37.40 for transformer and feeder protection voltage rating: 1 5.5 kv interrupting rating: 50ka maximum sym. current limiting construction: silver element in a double concentric helical configuration ? silica filler silver plated copper terminals and endcaps filament wound, glass epoxy fuse tube agency approvals: ul pending. features: general purpose fuses. bussmann s medium voltage fuses provide general purpose protection and are capable of interrupt- ing fault currents up to 50,000a rms sym. clip-lock double barrel fuse design. indoor and outdoor usage. the filament wound, glass epoxy fuse tube provides uv and moisture protection for the fuse. this makes bussmann s medium voltage fuses suitable for both indoor and outdoor applications. blown fuse indication. indicator travel distance is 16mm. operating frequency: 50/60 hz time current curves and dimensional data: ecl155 series , see page 3. peak let-through curves. see page 3. electrical characteristics ampere # of part number rating voltage ir barrels figure # style ECL155-250E 250e 15.5kv 50ka 2 1 clip-lock ecl155-300e 300e 15.5kv 50ka 2 1 clip-lock part number construction medium voltage voltage rating ampere rating example ecl 155 300e 155 = 15.5 kv catalog number cross reference ferraz-shawmut ferraz-shawmut bussmann new catalog # old catalog # ECL155-250E a155c3doro-250e 225-007-980 ecl155-300e a155c3doro-300e 225-007-981 current-limiting medium voltage fuses are classified into three categories: full range - defined by ansi as ? fuse capable of interrupting all currents from the maximum rated interrupting current down to the minimum continuous current that causes melting of the fusible element(s), when the fuse is applied at the maximum ambient tempe ra- ture specified by the manufacturer.? it is able to interrupt any normal 60 cycle current that will melt its element. general purpose - defined by ansi c37.40 as ? fuse capable of interrupting all currents from the maximum rated interrupting cur- rent down to the current that causes melting of the fusible element in one hour.? not all currents fall within this range. it is possible to receive an overcurrent lower than the value given by the one hour criterion. back-up - defined by ansi c37.40 as ? fuse capable of interrupting all currents from the maximum rated interrupting current down to the rated minimum interrupting current.? the minimum rated interrupting current is the lowest current that the fuse will be able to clear properly. this creates a need to place a low current interrupting device in series with the back-up rated fuse.
5-9-00 sb00055 rev. a e-rated medium voltage fuses ecl155 for transformer and feeder protection 15.5 kv - ecl155 series form no. ecl155 page 2 of 4 bif doc. #9004 bussmann figure 1 max. peak let-through current curves
5-9-00 sb00055 rev. a e-rated medium voltage fuses ecl155 for transformer and feeder protection 5.5 kv - peak arc voltage & peak let-through data form no.ecl155 page 3 of 4 bif doc. #9004 bussmann time-current characteristics - minimum melt
bussmann 5-9-00 sb00055 rev. a e-rated medium voltage fuses ecl155 for transformer and feeder protection 5.5 kv - peak arc voltage & peak let-through data form no.ecl155 page 4 of 4 bif doc. #9004 time-current characteristics - total clear
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