general purpose fuses general purpose fuses 34 w w w . l i t t e l f u s e . c o m ? 2005 littelfuse ? powr-gard ? products catalog klnr/klsr class rk1 fuses 250/600 vac ? fast acting ? 1 C 600 amperes specifications voltage ratings: ac: 250 volts (klnr); 600 volts (klsr) dc: 125 volts (1 C 600a klnr); 250 volts (1 C 30a klsr); 300 volts (35 C 600a klsr). i n te r rup t ing ratings: ac: 200,000 a m peres r m s sym m e t r i cal dc: 20,000 a m peres ampere range: 1 C 600 a m peres. approvals: ac: standard 248-12, class rk1 ul listed (file no: e81895) csa certified (file no: lr29862) dc: littelfuse self-certified ampere ratings 1 10 40 100 250 2 12 45 110 300 3 15 50 125 350 4 20 60 150 400 5 25 70 175 450 6 30 80 200 500 8 35 90 225 600 exa m ple part nu m ber (series & a m perage): klnr 200 recommended fuse blocks lr250 series (for klnr series fuses) lr600 series (for klsr series fuses) refer to the blocks & holders section of this catalog for additional i n fo rma tion. klnr/klsr series rk1 fuses were the earliest type of current-limiting fuses developed. their single-element, silver link design enables them to provide fast-acting overload and short-circuit pr o te c tion. when used to protect inductive loads such as motors, solenoids, and tran s for m ers, klnr/klsr series fuses must be greatly oversized to prevent opening the fuses on harmless in-rush currents. in such applications, klnr/ klsr series fuses may only provide short-circuit pr o te c tion. we recommend using powr-pro ? llnrk/llsrk series class rk1, dual-element, time-d e lay fuses in all new applications r e qui r ing the current-limiting ability of ul class rk1 fuses. powr-pro llnrk/ llsrk series fuses are also recommended in existing applications where fast-acting rk1 or rk5 fuses have been ope n ing on harmless system surges such as motor star t ing currents. applications resistance heaters lighting circuits non-inductive loads molded case circuit breaker load centers and panelboards have increased i n te r rup t ing ratings when series rated with littelfuse klnr/klsr class rk1 fuses. refer to panelboard manufacturers literature for ul listed co m b i n a tion of fuses and panelboards. series ratings up to 200,000 amperes are available. safety ? 200,000 a.i.r. reliable interruption of all overcurrents up to 200,000 amperes. ? extremely current-limiting stops da m a g ing short-circuit current faster than any mechanical pr o te c tive device. ? fast-acting provides fast acting protection to equipment such as variable speed drives, rectifiers and other equi p ment containing surge-sensitive co m p o nents. longer equipment life ? current-limiting design reduces damage to equi p ment caused by heating and magnetic effects of short-circuit currents. economical ? extremely current-limiting often permits use of readily available, less costly equipment. ? used as input or output fuses for surge sensitive co m p o nents such as variable speed drives and rectifiers, fast acting klnr/klsr fuses may prevent opening of e x pe n sive semiconductor fuses protecting individual components. easy to use ? 200,000 a.i.r. rating mi ni mi z es need for short-circuit calculations. dimensions ? refer to flnr_id for klnr dimensions and flsr_id for klsr dimensions.
general purpose fuses general purpose fuses 35 w w w . l i t t e l f u s e . c o m ? 2005 littelfuse ? powr-gard ? products catalog klnr/klsr class rk1 fuses 250/600 vac ? fast acting ? 1 C 600 amperes 1000 800 600 400 300 200 100 80 60 40 30 20 10 8 6 4 3 2 1 .8 .6 .4 .3 .2 .1 .0 8 .0 6 .0 4 .0 3 .0 2 .0 1 200 300 400 600 800 1000 2000 3000 4000 6000 8000 10000 20000 30000 40000 60000 80000 100000 10 20 30 40 60 80 100 30a 60a 100a 200a 400a 600a time in seconds current in amperes 548001 1000 800 600 400 300 200 100 80 60 40 30 20 10 8 6 4 3 2 1 .8 .6 .4 .3 .2 .1 .0 8 .0 6 .0 4 .0 3 .0 2 .0 1 200 300 400 600 800 1000 2000 3000 4000 6000 8000 10000 20000 30000 40000 60000 80000 100000 10 20 30 40 60 80 100 5 30a 60a 100a 200a 400a 600a time in second s current in amperes 549001 2000 3000 4000 6000 8000 10000 20000 30000 40000 60000 80000 100000 200000 100 200 300 400 600 800 1000 100 200 300 400 600 800 1000 2000 3000 4000 6000 8000 10000 20000 30000 40000 60000 80000 100000 200000 300000 400000 600000 800000 1000000 600a 400a 200a 100a 60a 30a peak let -thru in amperes ava ilable f aul t current symmetrical r. m. s. amperes 05548002 2000 3000 4000 6000 8000 10000 20000 30000 40000 60000 80000 100000 200000 100 200 300 400 600 800 1000 100 200 300 400 600 800 1000 2000 3000 4000 6000 8000 10000 20000 30000 40000 60000 80000 100000 200000 300000 400000 600000 800000 1000000 600a 400a 200a 100a 60a 30a peak let -thru in amperes ava ilable f aul t current symmetrical r. m. s. amperes 05549002 klsr klnr klsr klnr
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