LH601001C

Blocks and Holders Fuse Blocks General Information 4. Determine if NEC, CSA, UL, or other requirements are applicable If fuse blocks will be installed in equipment to be submitted for agency approval, the requirements should be obtained from the approving agency in advance of fuse and fuse block selection. 5. Select the type of wire termination A choice of three types of wire termination is available: a) Screw* — for use with spade lugs or ring terminals. b) Screw with Pressure Plate* — for use with solid or stranded wire without terminal. Recommended where vibration will be a factor. c) Box Lug — the most durable. For use with all types of solid wire and Class B and Class C stranded wire. Not for use with welding cable or other rope-stranded conductors. * 1/4” Quick Connect terminals rated for up to 20A are available on the Midget and Class CC fuse blocks. Fuse Block Selection The following guidelines should help simplify the selection of proper fuse blocks: Screw with Pressure Plate (P) 1. Determine the system voltage Since fuses are selected on the basis of sys­tem voltage, fuse blocks are selected to match the voltage rating of the fuse. Screw (S) Box Lug (C) 6. Decide on the number of poles in each block 2. Determine the design short-circuit current Class H fuse blocks will accept Class H or K5 fuses (which have an interrupting rating of up to 50,000 amperes) and Class R fuses (which have a 200,000 A.I.R.). To prevent the possibility of inserting a fuse with the incorrect in­ter­rupt­ing rating, the use of Class R fuse blocks is recommended for use with Class R fuses. Use Class H fuse blocks with Class H or K5 fuses. These fuse blocks are dimensionally the same, but the Class R fuse blocks incorporate a rejection feature which allows only Class R fuses to be inserted. The number of poles for each set of fuses is determined by the characteristics of the circuit. The option to gang individual fuse blocks into long strips will be determined by the avail­able space and by the type of wire being used. Blocks and Holders Available and/or design short-circuit current is an important consideration when de­ter­min­ing the class of fuse and fuse blocks to use. If available short-circuit current cannot be determined, or if it will vary with equip­ment location, select fuses with a 200,000 ampere interrupting rating (A.I.R.) and mating fuse blocks with a withstand rating of 200,000 amperes for maximum safety. 7. Determine if fuse clips need to be re­in­forced Fuse clips may have a tendency to lose some of their tension over a period of time. This may be prevented by specifying reinforced fuse clips. Reinforced clips are standard on certain fuse blocks (see individual product pages). Ordering Information The Littelfuse fuse block part number con­sists of 6 or 7 components, as shown below and in the individual fuse block data tables. 3. Determine the type and ampere rating of the fuse to be used In addition to voltage and interrupting rating as discussed above, the fuse ampere rating, opening characteristics (fast acting or time-delay) and size are other important con­sid­er­ations in fuse selection. Once the fuse type is selected, the mating fuse block can be chosen. Fuse blocks are available in 30, 60, 100, 200, 400 and 600 amp ratings, and may be used with a fuse rated at the cor­re­spond­ing amperage rating or below. For example, a fuse block rated at 30 amperes may be used with a fuse rated from 0 to 30 amperes. For all Class R, H, J, T and 15, 20 & 60A Class G Fuse Blocks © 2005 Littelfuse • POWR-GARD™ Products Catalog www.littelfuse.com For all Class CC, Midget and 30A Class G Fuse Blocks 111 Blocks and Holders Class H/K5 and R Fuse Blocks 250 and 600 Volt Features/Benefits • Class H and Class R fuse blocks feature clip designs to maximize electrical contact and minimize heat rise. • Reinforcing clips are standard on all Class H fuse blocks rated 100 amp and higher. Note: For reinforcing clips on Class H blocks rated 30-60 amp, add “R” suffix to connector type. • Reinforcing clips are standard on all Class R fuse blocks Specifications Voltage Rating: Ampere Ratings: Approvals: 250 Volts; 600 Volts 0 – 600 amperes UL Listed (File No. E14721) CSA Certified (File No. LR73091) Recommended Fuses Class H Blocks 250V 600V NLN NLS RLN RLS Class H and Class R fuse blocks are dimensionally the same, but Class R blocks incorporate a rejection feature, which only allows Class R fuses to be inserted. Note: For optional fuse block covers, refer to POWR-Covers section of this catalog. Class H 250V Class H 600V Amp No. of Rating Poles 30 Blocks and Holders 60 100 200 400 600 1 2 3 1 2 3 1 2 3 1 3 1 3 1 3 Catalog Number LH25030-1 LH25030-2 LH25030-3 LH25060-1 LH25060-2 LH25060-3 LH25100-1 LH25100-2 LH25100-3 LH25200-1 LH25200-3 LH25400-1 LH25400-3 LH25600-1 LH25600-3 Connector Type (Add Suffix Shown) Pres­sure Box Screw Plate Lug S (R) P (R) C (R) S (R) P (R) C (R) S (R) P (R) C (R) S (R) C (R) S (R) C (R) S (R) C (R) C C C C C CR CR C C Max­i­mum Wire Size Amp No. of Rating Poles S & P = #10 CU C = #6 CU-AL 30 S = #10 CU C = #2 CU-AL 60 #2/0 CU-AL 100 250 MCM CU-AL 200 (2) 350 MCM CU-AL 400 (2) 500 MCM CU-AL 600 1 2 3 1 2 3 1 2 3 1 3 1 3 1 3 Catalog Number LH60030-1 LH60030-2 LH60030-3 LH60060-1 LH60060-2 LH60060-3 LH60100-1 LH60100-2 LH60100-3 LH60200-1 LH60200-3 LH60400-1 LH60400-3 LH60600-1 LH60600-3 Connector Type (Add Suffix Shown) Pres­sure Box Screw Plate Lug S (R) P (R) C (R) S (R) P (R) C (R) S (R) P (R) C (R) C (R) C (R) C (R) C C C C C CR CR C C Max­i­mum Wire Size S & P = #10 CU C = #6 CU-AL S = #10 CU C = #2 CU-AL #2/0 CU-AL 250 MCM CU-AL (2) 350 MCM CU-AL (2) 500 MCM CU-AL Note: Reinforcing springs standard on all Class H fuseblocks 100 amperes and above. Note: Reinforcing springs standard on all Class H fuse blocks 100 amperes and above. Class R 250V Class R 600V Amp No. of Rating Poles 30 60 100 200 400 600 1 2 3 1 2 3 1 2 3 1 3 1 3 1 3 Catalog Number LR25030-1 LR25030-2 LR25030-3 LR25060-1 LR25060-2 LR25060-3 LR25100-1 LR25100-2 LR25100-3 LR25200-1 LR25200-3 LR25400-1 LR25400-3 LR25600-1 LR25600-3 Connector Type (Add Suffix Shown) Pres­sure Box Screw Plate Lug SR PR CR SR PR CR SR PR CR CR CR CR C C C C C CR CR C C Note: Reinforcing springs standard on all Class R fuse blocks. 112 Class R Blocks 250V 600V FLNR/FLNR_ID FLSR/FLSR_ID KLNR KLSR LLNRK LLSRK/LLSRK_ID TLN IDSR Max­i­mum Wire Size Amp No. of Rating Poles S & P = #10 CU C = #6 CU-AL 30 S = #10 CU C = #2 CU-AL 60 #2/0 CU-AL 100 250 MCM CU-AL 200 (2) 350 MCM CU-AL 400 (2) 500 MCM CU-AL 600 1 2 3 1 2 3 1 2 3 1 3 1 3 1 3 Catalog Number LR60030-1 LR60030-2 LR60030-3 LR60060-1 LR60060-2 LR60060-3 LR60100-1 LR60100-2 LR60100-3 LR60200-1 LR60200-3 LR60400-1 LR60400-3 LR60600-1 LR60600-3 Connector Type (Add Suffix Shown) Pres­sure Box Screw Plate Lug SR PR CR SR PR CR SR PR CR CR CR CR C C C C C CR CR C C Max­i­mum Wire Size S & P = #10 CU C = #6 CU-AL S = #10 CU C = #2 CU-AL #2/0 CU-AL 250 MCM CU-AL (2) 350 MCM CU-AL (2) 500 MCM CU-AL Note: Reinforcing springs standard on all Class R fuse blocks. www.littelfuse.com © 2005 Littelfuse • POWR-GARD™ Products Catalog Blocks and Holders Class H/K5 and R Fuse Blocks 250 Volt 250V 30A .22/5.6 DIA. HOLE THRU 4 PLACES 1.91" 2.95" [48.5] [74.9] 1.25" 1.50" [31.8] 1.50" [38.1] [38.1] 3.00" [76.2] .50" [13] [19] .33" .19" .75" 1.12" .53" .22" [8.4] [4.8] [5.7] 1.25" [28.4] [31.7] 1 POLE 2 POLE [13] 2.50" 1.38" [63.5] [35.1] 3 POLE 250V 60A .218/[5.54] DIA. C'BORE .400/[10.16] DIA. X .63[16] DP 4.83" [122.7] 1.24" 1.24" 1.79" 1.79" 1.79" [45.6] [45.6] .49" .50" [12] [12.7] .49 [12] .50" [12.7] 1.33" 1.33" [33.7] [33.7] [37.6] 2.86" 250V 100A 2 POLE .28 (7.1) THRU .53 (13.5) C'BORE x .60 (15.2) DP .50" [12.7] [33.7] 4.23" .74" [19] 2.01" [108] [72.7] 1 POLE 1.33" Blocks and Holders 1.48" [31.5] [31.5] [45.6] [12] [122.7] 1.24" [31.5] .49" 4.83" 4.83" [122.7] [51.1] 3 POLE 3 POLE 2 POLE .187 HEX SOCKET 1 POLE STRIP GAUGE .63 2.37 6.13 STRIP GAUGE STRIP GAUGE STRIP GAUGE 1.88 2.44 [62.0] .61 TYP. 1.56 TYP. FUSE q 1.56 3.49 [88.6] 1.93 [49.0] 5.05 [128.3] © 2005 Littelfuse • POWR-GARD™ Products Catalog www.littelfuse.com 113 Blocks and Holders Class H/K5 and R Fuse Blocks 250 Volt 250V 200A 3.00" 3.00" [76.2] 3.00" [76.2] [76.2] 2.00" 2.00" [50.8] 2.00" [50.8] .50" .50" [13] .50" [13] [13] .312" HEX. .312" HEX. .312" HEX. [50.8] 7.13" 7.13" [181.1] 7.13" [181.1] .50" .50" [13] .50" [13] [13] [181.1] 3.00" 3.00" [76.2] 3.00" [76.2] 3.00" 3.00" [76.2] 3.00" [76.2] 2.06" 2.06" 2.06" [52.3] 2.06" [52.3] [76.2] [76.2] 2.06" [52.3] 2.06" [52.3] [52.3] [52.3] 1 POLE 1 POLE 1 POLE 1.23" 1.23" [31.2] 1.23" [31.2] [31.2] [235] [235] [88.9] 11.50" 11.50" [292.1] 11.50" [292.1] 1.06" 1.06" 1.06" [26.9] [26.9] [26.9] .66" .66" .66" [16.8] [16.8] [16.8] 3.31" 3.31" [84] 3.31" [84] [84] 11.50" 11.50" [292.1] 11.50" [292.1] [292.1] [292.1] 4.00" 4.00" 4.00" [101.6] 4.00" [101.6] [101.6] 4.00" [101.6] 4.00" [101.6] [101.6] 3.75 3.75" 3.75" [95.3] 3.75" [95.3] 3.75 [95.2] 3.75 [95.2] [95.2] [95.3] 10.50" 10.50" [266.7] 10.50" [266.7] 3 [266.7] POLE 3 POLE 3 POLE 1 POLE 1 POLE 1 POLE 250V 600A 3.00" 3.00" [76.2] 3.00" [76.2] [76.2] 3 POLE 3 POLE 3 POLE 9.25" 9.25" 9.25" [235] 3.50" 3.50" [88.9] 3.50" [88.9] 250V 400A Blocks and Holders [102] 3.01" 3.01" [76.5] 3.01" [76.5] [76.5] 7.13" 7.13" [181.1] 7.13" [181.1] [181.1] 4.50" 4.50" [114.3] 4.50" [114.3] [114.3] 11.00" 11.00" [279.4] 11.00" [279.4] .75" .75" [19] .75" [19] [19] [279.4] 4.37" 4.37" [111] 4.37" [111] [111] 14.00" 14.00" [355.6] 14.00" [355.6] 14.00" 14.00" [355.6] 14.00" [355.6] [355.6] [355.6] 5.00" 5.00" [127] 5.00" [127] 5.00" 5.00" [127] 5.00" [127] 4.50" 4.50" [114.3] 4.50" [114.3] [114.3] [127] [127] 4.50" 4.50" [114.3] 4.50" [114.3] [114.3] 1 POLE 1 POLE 1 POLE 114 2.00" 2.00" [50.8] 2.00" [50.8] [50.8] 9.00" 9.00" [229] 9.00" [229] [229] 4.00" 4.00" [102] 4.00" [102] 12.50" 12.50" [317.5] 12.50" [317.5] [317.5] 3 POLE 3 POLE 3 POLE www.littelfuse.com © 2005 Littelfuse • POWR-GARD™ Products Catalog Blocks and Holders Class H/K5 and R Fuse Blocks 600 Volt 600V 30A .265" [6.7] DIA. THRU .05" [12.7] C'BORE x .44 [11.2] DP. .34" [8.7] 3.13" 3.13" 3.13" [79.4] [79.4] .31" [79.4] 6.25" [7.9] 6.25" [159] [159] 6.25" [159] .38" [97] 1.63" .25" [41.4] 2.94" .62" [6.5] 1.56" 3.13" [39.6] [79.2] [74.7] 1 POLE 600V 60A 3.51" [18] [42.9] 5.08" [89.2] [1.29] 6.75" 6R30 [171.4] .50" D. 4.25" 3 POLE [49.5] [7.1] 1.69" [108] 2 POLE 1.95" .281" D. .69" [16] 3.12" [79.2] [12.7] 1.81" [46] .66" 1.56" [19.6] 3.12" [39.6] 1.56" [39.6] 1 POLE .77" [79.2] 1.29" 2.12" [79.2] 2 POLE [6.8] [19.6] 3.12" [32.8] .27" Blocks and Holders .62" [15.7] [53.8] 3 POLE 600V 100A 3 POLE .28 (7.1) DIA. THRU .59 (14.9) C'BORE x .64 (16.2) DP. TYP. 6R60 STRIP GAUGE 8.13 1 POLE 2 POLE .187 HEX SOCKET STRIP GAUGE STRIP GAUGE 4.26 .87 STRIP GAUGE 1.93 2.60 [66.0] © 2005 Littelfuse • POWR-GARD™ Products Catalog .61 1.81 TYP. 5.73 [145.5] www.littelfuse.com 3.91 [99.3] 2.10 [53.3] 115 Blocks and Holders Class H/K5 and R Fuse Blocks 600 Volt 600V 200A .50" [13] .50" 3.00" [76.2] 3.00" [76.2] 2.00" [50.8] 2.00" 3.00" .50" 2.00" [13] [13] 9.62" [244] 9.62" [76.2] [50.8] [50.8] .312" HEX. .312" HEX. .50" [13] .50" [50.8] 2.00" 9.00" [229] 9.00" [229] 4.00" [102] 4.00" 9.00" .50" 2.00" 4.00" [13] .312" HEX. [13] [102] [229] [50.8] [102] [50.8] 3.01" [76.5] 3.01" [76.5] 3.01" [76.5] 9.62" [244] 9.62" [244] [244] 9.62" [244] 3.00" [76.2] 3.00" 9.62" [244] 3.00" [76.2] 3.00" 3.00" 3.00" 3.31" 3.31" 3.31" [84.1] 3.31" 3.31" 3.31" [84.1] 1.23" 1.23" [31.2] [76.2] [76.2] [76.2] [76.2] [84.1] [84.1] [84.1] [84.1] 1 POLE 1 POLE [31.2] 1.23" [31.2] 1 POLE 600V 400A 14.50" [368.3] 14.50" [26.0] 1.06" 3.50 " 9.25" 3.31" [88.9] 14.50" [235] .66" .66" [16.8] [16.8] .66" [16.8] [26.0] 3.31" [84.1] 3.31" [368.3] [84.1] [84.1] [368.3] [368.3] [368.3] 7.00" 7.00" 7.00" [177.8] 7.00" 7.00" 7.00" 3.75 [95.3] 3.75 3.75" [95.3] 3.75" [177.8] [177.8] [177.8] [177.8] Blocks and Holders 3 POLE [235] 14.50" [177.8] [95.3] [95.3] 3.75 [95.3] 1 POLE 1 POLE 1 POLE 2.25" [57.2] 2.25" 3.75" [95.3] [57.2] 2.25" [57.2] 4.50" [114.3] 4.50" [114.3] 17.00" [431.8] 17.00" [76.2] 1.06" 1.06" [26.0] 9.25" [235] 9.25" 14.50" [368.3] 14.50" 600V 600A 3.00" [76.2] 3.00" [76.2] 3 POLE 3.00"3 POLE 3.50 " [88.9] " 3.50 [88.9] 4.50" [114.3] 10.50" [266.7] 10.50" [266.7] 3 POLE 310.50" POLE [266.7] 3 POLE .75" [19] .75" 11.00" [279.4] 11.00" 4.31" 4.31" [109.5] .75" 17.00"[19] [431.8] 17.00" 11.00" 4.31" [19] [279.4] [279.4] [109.5] [109.5] [431.8] [431.8] 17.00" 17.00" [431.8] [431.8] 8.00" [203] 8.00" 8.00" [203] 8.00" 8.00" 8.00" 4.50" [114] 4.50" 4.50" [114] 4.50" [203] [203] [203] [203] [114] [114] 4.50" 3.00" [76.2 ] 3.00" [114] 1 POLE 1 POLE 1 POLE 116 2.00" [76.2 ] 3.00" [76.2 ] 4.50" [114] 12.50" 12.50" [317.5] [317.5] 3 POLE 12.50" 3 POLE [317.5] 3 POLE www.littelfuse.com © 2005 Littelfuse • POWR-GARD™ Products Catalog