4-5-00 sb00020 rev. a e-rated medium voltage fuses ecl055 for transformer and feeder protection 5.5 kv form no. ecl055 page 1 of 3 bif doc. #9002 bussmann catalog symbol: ecl055 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: 5.5 kv interrupting rating: 63ka 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 63,000a rms sym. clip-lock and bolt-in style available in double and triple barrel fuse designs. 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: ecl055 series , see page 3. peak let-through curves. see page 3. electrical characteristics ampere # of part number rating voltage ir barrels figure # style ecl055-500e 500e 5kv 63ka 2 1 clip-lock ecl055-600e 600e 5kv 63ka 2 1 clip-lock ECL055-750E 750e 5kv 63ka 3 2 bolt-in ecl055-900e 900e 5kv 63ka 3 2 bolt-in part number construction medium voltage voltage rating ampere rating example ecl 055 500e 055 = 5.5 kv catalog number cross reference ferraz-shawmut ferraz-shawmut bussmann new catalog # old catalog # cutler-hammer ecl055-500e a055c2doro-500e 225-007-954 5hcl14-500e ecl055-600e a055c2doro-600e 225-007-955 5hcl14-600e ECL055-750E a055b3doro-750e a550x 750e-4 5hcl14-750e ecl055-900e a055b3doro-900e a550x 900e-4 5hcl14-900e 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.
4-5-00 sb00020 rev. a e-rated medium voltage fuses ecl055 for transformer and feeder protection 5.5 kv - ecl055 series form no. ecl055 page 2 of 3 bif doc. #9002 bussmann figure 1 figure 2
4-5-00 sb00020 rev. a max. peak let-through current curves e-rated medium voltage fuses ecl055 for transformer and feeder protection 5.5 kv - peak arc voltage & peak let-through data form no.ecl055 page 3 of 3 bif doc. #9002 bussmann time-current characteristics - minimum melt time-current characteristics - total clear
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