250FM COOPER | Alldatasheet

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Technical content

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa 187 High Speed Fuses British BS 88 Fuses General Information Designed and tested to:

  • BS 88: Part 4
  • IEC 269: Part 4
  • UL Recognized Cooper Bussmann offers the industry’s widest range of British style semiconductor fuses and accessories. Cooper Bussmann British style products use innovative arc quenching techniques and high grade materials to provide:
  • Minimal energy let-through (I 2t)
  • Excellent DC performance
  • Good surge withstand profile British style fuses are typically found in equipment manufactured in the United Kingdom or British Commonwealth countries. However, North American manufacturers have begun to specify British style fuses — particularly in UPS applications at 240V or less — to take advantage of their size, performance and cost benefits. Voltage Rating All Cooper Bussmann British style fuses are tested to IEC 269: Part 4. This standard requires a test voltage which is 5% higher than the rated voltage. In North America, fuses are required to clear only their rated voltage. Accessories Trip-indicator fuses are available for use in parallel with the main fuse. Indicator fuses can be attached to the associated fuselink, or mounted separately in panel-mounted fuseclips. In addition, a push-on adapter and microswitch attachment are available, to provide remote indication. Fuse blocks are also available for most applications. Introduction British BS 88 Contents Fuse Amp Volts Range Page 240 6-900 188-190 690 6-710 191-194 Accessories Indicator System & Fuse Bases 195 British BS 88 Fuse Ranges AAmmppss VVaacc VVddcc 6-900 240 150 6-710 690 500 High Speed Fuses

arc voltage, UL, which may appear across the fuse during its operation as a function of the applied working voltage, Eg, (rms) at a power factor of 15%. Power Losses Watts loss at rated current is given in the electrical characteristics. The curve allows the calculation of the power losses at load currents lower than the rated current. The correc- tion factor, Kp, is given as a function of the RMS load current, Ib, in % of the rated current. Catalog Numbers EElleeccttrriiccaall CChhaarraacctteerriissttiiccss RRaatteedd II22tt ((AA22 SSeecc)) CCaattaalloogg CCuurrrreenntt CClleeaarriinngg CClleeaarriinngg WWaattttss NNuummbbeerrss TTyyppee RRMMSS--AAmmppss PPrree--aarrcc aatt 112200VV aatt 224400VV LLoossss 6LCT 6 2 6 9 1.0 10LCT 10 3.8 12 22 2.5 12LCT LCT 12 7 22 32 2.5 16LCT 16 20 50 100 2.5 20LCT 20 25 80 160 4.0 25LET 25 18 120 250 4.0 32LET 32 32 200 450 5.0 35LET 35 50 320 600 5.0 50LET 50 100 500 1400 7.0 63LET LET 63 180 1100 2200 9.0 80LET 80 300 1900 3800 10.0 100LET 100 600 3800 7500 10.0 125LET 125 600 3800 7500 16.0 160LET 160 1100 7000 16000 20.0 180LETa 180 1600 12000 29000 21.0 160LMT 160 1100 7000 16000 17.0 200LMT 200 1500 10000 20000 28.0 250LMT 250 3200 20000 40000 28.0 315LMT LMT 315 6000 35000 75000 35.0 355LMT 355 8000 50000 100000 35.0 400LMT 400 14000 70000 160000 40.0 450LMT 450 18000 100000 220000 42.0 400LMMT 400 6000 35000 80000 60.0 500LMMT 500 14000 80000 170000 64.0 630LMMT LMMT 630 24000 150000 300000 75.0 710LMMT 710 32000 200000 460000 77.0 800LMMT 800 52000 300000 600000 82.0 900LMMT 900 75000 400000 800000 97.0

  • Watts loss provided at rated current.
  • Note: 7LET, 10LET, 12LET and 16LET are available for replacement purposes on existing equipment.
  • See accessories on page 195. Features and Benefits
  • Excellent cycling capability
  • Excellent DC performance
  • Low arc voltage and low energy let-through (I 2t) For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa188 High Speed Fuses British BS 88 — 240V: 6-900A 5641.826.2 17.7 19.1 12.7 7.1 9.7 Fig. 2: LET 473828 6.4 8.4 8.7 5.5 Dimensions (mm) Fig. 1: LCT LCT, LET, LMT, LMMT Specifications Description: BS 88 style stud-mount fuses. Dimensions: See dimensions illustrations. Ratings: Volts: — 240Vac/150Vdc Amps: — 6-900A IR: — 200kA RMS Sym. Agency Information: CE, Designed and tested to: BS 88 Part 4, IEC 269 Part 4, UL Recognized. All fuses above have been tested at 318Vac. Consult Cooper Bussmann for specific UL Recognition status.

Electrical Characteristics

The total clearing I2t at rated voltage and at power factor of 15% are given in the electrical characteristics. For other voltages, the clearing I 2t is found by multiplying by correction factor, K, given as a function of applied working voltage, Eg, (rms). 845931 25.4 13.5 10.3 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 10050 150 200 250 Eg K 845931 38.1 25.4 10.3 13.5 Fig. 3: LMT Fig. 4: LMMT Indicator (Optional) 1) LCT 2) LET, LMT, LMMT Kp 1.0 0.8 0.4 0.5 0.6 0.3 0.2 0.1 30 40 50 60 70 80 90 100% Ib 750 500 250 100 200 300 Eg UL 1) LCT 2) LET, LMT, LMMT Typical Applications

  • DC common bus
  • AC and DC drives
  • Power converters/rectifiers
  • Reduced voltage starters Data Sheet: 720004

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa 189 British BS 88 — 240V: 6-900A Peak Let-Through Curve LET 25-180A: 240V Time-Current Curve LCT 6-20A: 240V Time-Current Curve 104 103 102 10–1 10–2 10–3 10–4 Prospective Current In Amps RMS Virtual Pre-Arcing Time In Seconds 24 6 8 101 224 6 8 2 102 24 6 8 103 100 101 20LCT 16LCT 12LCT 10LCT 6LCT 104 103 102 101 224 6 8 2 102 24 6 8 103 100 101 Prospective Current In Amps RMS Virtual Pre-Arcing Time In Seconds 63LET 50LET 35LET 32LET 25LET 180LETa 160LET 125LET 100LET 80LET 10–4 10–3 10–2 10–1 Prospective Short-Circuit Current Symmetrical RMS 101 10226 42 4 6 103 24 6 104 24 6 105 Peak Let-Through Current 101 102 103 104 105 SYMMETRICAL FAULT FULL Y ASYMMETRICAL FAULT 20LCT 16LCT 12LCT 10LCT 6LCT 25LET 32LET 35LET 50LET 63LET 80LET 125 & 100LET 160LET & LMT 200LMT 180LET 250LMT 315LMT 355LMT 400 & 500LMMT 450LMT 630LMMT 710LMMT 800LMMT 900LMMT High Speed Fuses High Speed Fuses Data Sheet: 35785296 Data Sheet: 35785293

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa190 High Speed Fuses British BS 88 — 240V: 6-900A 10–4 10–3 10–1 102 102 224 6 8 2 103 24 6 8 104 100 101 104 315LMT 450LMT 400LMT 355LMT 250LMT 200LMT 160LMT Prospective Current In Amps RMS Virtual Pre-Arcing Time In Seconds 103 10–2 10–1 10–3 10–2 102 103 104 102 224 6 8 2 103 24 6 8 104 100 101 Prospective Current In Amps RMS Virtual Pre-Arcing Time In Seconds 10–4 710LMMT 900LMMT 800LMMT 630LMMT 500LMMT 400LMMT Prospective Short-Circuit Current Symmetrical RMS 101 10226 42 4 6 103 24 6 104 24 6 105 Peak Let-Through Current 101 102 103 104 105 SYMMETRICAL FAULT FULL Y ASYMMETRICAL FAULT 20LCT 16LCT 12LCT 10LCT 6LCT 25LET 32LET 35LET 50LET 63LET 80LET 125 & 100LET 160LET & LMT 200LMT 180LET 250LMT 315LMT 355LMT 400 & 500LMMT 450LMT 630LMMT 710LMMT 800LMMT 900LMMT Peak Let-Through Curve LMMT 400-900A: 240V Time-Current Curve LMT 160-450A: 240V Time-Current Curve Data Sheet: 35785294 Data Sheet: 35785295

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa 191 British BS 88 — 690V: 6-710A High Speed Fuses High Speed Fuses CT, ET, FE, EET, FEE, FM, FMM, MT, MMT Specifications Description: BS 88 style stud-mount fuses. Dimensions: See dimensions illustrations. Ratings: Volts: — 690Vac/500Vdc Amps: — 6-710A IR: — 200kA RMS Sym. Agency Information: CE, Designed and tested to: BS 88 Part 4, IEC 269 Part 4, UL Recognized. MT and MMT — 350Vdc (IEC) rating. Consult Cooper Bussmann for UL Recognition status. The total clearing I2t at rated voltage and at power factor of 15% are given in the electrical characteristics. For other voltages, the clearing I 2t is found by multiplying by correction factor, K, given as a function of applied working voltage, Eg, (rms). Dimensions (mm) Fig. 1: CT 7763.548 17.1 19.1 12.7 7.1 9.7 947046 31.8 8.7 11.9 113A50 38.1 25.4 10.3 13.5 113A50 25.4 10.3 Fig. 2: ET, FE 74.664.354.8 6.4 8.78.7 5.5 Fig. 3: EET, FEE Fig. 4: FM, MT Fig. 5: FMM, MMT 1mm = 0.0394” / 1” = 25.4mm Figs. 4 & 5 “A” Dimensions Type “A” FM 80-85mm FMM 80-85mm MT 85mm MMT 85mm Arc Voltage This curve gives the peak arc voltage, UL, which may appear across the fuse during its operation as a function of the applied working voltage, Eg, (rms) at a power factor of 15%. Power Losses Watts loss at rated current is given in the electrical characteristics. The curve allows the calculation of the power losses at load currents lower than the rated current. The correction factor, Kp, is given as a function of the RMS load current, Ib, in % of the rated current. Features and Benefits

  • Excellent cycling capability
  • Excellent DC performance
  • Low arc voltage and low energy let-through (I 2t)
  • Low watts loss Typical Applications
  • DC common bus
  • DC drives
  • Power converters/rectifiers
  • Reduced voltage starters 1500 1000 500 200 400 600 660 Eg UL 1) CT 2) ET, FE, EET, FEE, FM, FMM 200 300 400 500 600 690 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1) 2) Eg K 1) CT, ET, EET, FE, FEE, MT, MMT 2) FM, FMM Kp 1.0 0.8 0.4 0.5 0.6 0.3 0.2 0.1 30 40 50 60 70 80 90 100% Ib Data Sheet: 720024

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa192 High Speed Fuses British BS 88 — 690V: 6-710A 103 10–1 24 6 8 101 224 6 8 2 102 24 6 8 103 100 101 10CT 12CT 16CT 20CT 6CT 32ET 25ET Prospective Current In Amps RMS Virtual Pre-Arcing Time In Seconds 56ET 80ET 63ET 45ET 40ET 35ET 10–3 10–2 102 104 Prospective Short-Circuit Current Symmetrical RMS Peak Let-Through Current 2 4 62 4 62 4 62 4 6 101 102 103 104 105 101 102 103 104 105 2 20CT 16CT 12CT 10CT 6CT 80ET 63ET 56ET 45ET 40ET 35ET 32ET 25ET 710MMT 630MMT 560MMT 500MMT 450MMT 315MT 355MT 400MMT 280MT 355MMT 250MT 315MMT 280MMT 200MT 180MT 225MMT 160MT 200MMT 180MMT 160EET 140EET 110EET 90EET Peak Let-Through Curve CT 6-20, ET 25-80A: 690V Time-Current Curve EElleeccttrriiccaall CChhaarraacctteerriissttiiccss RRaatteedd II22tt ((AA22 SSeecc)) CCaattaalloogg CCuurrrreenntt CClleeaarriinngg CClleeaarriinngg WWaattttss NNuummbbeerrss TTyyppee RRMMSS--AAmmppss PPrree--aarrcc aatt 441155VV aatt 666600VV LLoossss 6CT 6 1.8 8.5 12 2 10CT 10 7 30 48 3 12CT CT 12 10 40 65 3 16CT 16 16 66 110 7 20CT 20 32 150 220 7 25ET 25 25 150 250 7 32ET 32 32 190 350 11 35ET 35 52 310 500 11 40ET ET 40 103 600 900 9 45ET 45 103 680 1100 11 56ET 56 135 950 1500 14 63ET 63 171 1200 2000 16 80ET 80 360 2500 4000 18 35FE 35 33 130 200 9 40FE 40 52 180 300 9 45FE 45 76 270 450 11 50FE 50 103 380 600 11 63FE FE 63 135 480 750 12 71FE 71 210 600 950 17 80FE 80 250 900 1500 20 90FE 90 360 1300 2100 20 100FE 100 470 1800 2800 23 90EET 90 490 3000 4500 19 110EET EET 110 600 4000 6500 27 140EET 140 1050 7000 12000 35 160EET 160 1500 10000 17000 39 100FEE 100 400 1600 2400 24 120FEE 120 540 1900 3100 32 140FEE FEE 140 850 2500 3800 36 160FEE 160 1000 3700 5700 46 180FEE 180 1400 5300 8400 46 200FEE 200 1900 7100 11400 52 180FM 180 1400 7500 13500 40 200FM 200 2600 10500 18500 40 225FM 225 3700 14500 26500 44 250FM FM 250 5200 20500 37500 48 280FM 280 7000 30500 55000 48 315FM 315 10000 40000 77000 55 350FM 350 15000 60000 105000 55 400FMM 400 10000 40000 72500 85 450FMM 450 15000 60000 105000 90 500FMM FMM 500 20000 82000 150000 100 550FMM 550 30000 120000 215000 100 630FMM 630 45000 180000 310000 100 700FMM 700 60000 245000 420000 120 160MT 160 2400 15000 25000 26 180MT 180 3800 25000 38000 26 200MT 200 6000 40000 58000 27 250MT MT 250 11500 80000 110000 32 280MT 280 16500 100000 150000 35 315MT 315 19000 125000 180000 42 355MT 355 22000 160000 200000 51 180MMT 180 1650 12000 18000 42 200MMT 200 2200 16000 23000 42 225MMT 225 3700 26000 40000 42 280MMT 280 6600 47000 70000 47 315MMT 315 8600 62000 91000 51 355MMT MMT 355 13500 97000 140000 54 400MMT 400 21000 150000 220000 60 450MMT 450 30000 220000 320000 57 500MMT 500 42000 300000 450000 64 560MMT 560 60000 430000 640000 64 630MMT 630 68500 500000 720000 86 710MMT 710 78000 600000 850000 105

  • Watts loss provided at rated current.
  • Note: FC, 8ET, 12ET, 15ET, 20ET, 65EET and 75EET are available for replacement purposes on existing equipment.
  • See accessories on page 195. Data Sheet: 35785312 Catalog Numbers

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa 193 British BS 88 — 690V: 6-710A High Speed Fuses High Speed Fuses 103 104 102 10–1 10–2 24 6 8 102 224 6 8 2 103 24 6 8 104 100 101 Prospective Current In Amps RMS Virtual Pre-Arcing Time In Seconds 160EET 140EET 110EET 90EET 200MT 355MT 315MT 280MT 250MT 180MT 160MT 10–3 Prospective Short-Circuit Current Symmetrical RMS Peak Let-Through Current 2 4 62 4 62 4 62 4 6 101 102 103 104 105 101 102 103 104 105 2 20CT 16CT 12CT 10CT 6CT 80ET 63ET 56ET 45ET 40ET 35ET 32ET 25ET 710MMT 630MMT 560MMT 500MMT 450MMT 315MT 355MT 400MMT 280MT 355MMT 250MT 315MMT 280MMT 200MT 180MT 225MMT 160MT 200MMT 180MMT 160EET 140EET 110EET 90EET Peak Let-Through Curve EET 90-160A, MT 160-355A: 690V Time-Current Curve 104 103 102 10–1 10–3 Prospective Current In Amps RMS Virtual Pre-Arcing Time In Seconds 102 224 6 8 2 103 24 6 8 104 100 101 280MMT 355MMT 315MMT 225MMT 200MMT 180MMT 630MMT 710MMT 560MMT 500MMT 450MMT 400MMT 10–2 MMT 180-710A: 690V Time-Current Curve Data Sheet: 35785313 Data Sheet: 35785311

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa194 High Speed Fuses British BS 88 — 690V: 6-710A 104 103 102 10–1 10–2 10–3 10–4 102 224 6 8 2 103 24 6 8 104 100 101 120FEE 140FEE 160FEE 180FEE 200FEE 100FEE 550FMM 700FMM 630FMM 500FMM 450FMM 400FMM Prospective Current In Amps RMS Virtual Pre-Arcing Time In Seconds FEE 100-200A & FMM 400-700A: 690V Time-Current Curve Prospective Short-Circuit Current Symmetrical RMS Peak Let-Through Current 102 24 62 103 104 103 24 6 104 24 6 105 2 180FEE 100FEE 120FEE 140FEE 160FEE 200FEE 400FMM 450FMM 500FMM 550FMM 630FMM 700FMM Peak Let-Through Curve 103 102 10–1 10–2 10–4 24 6 8 102 224 6 8 2 103 24 6 8 104 100 101 100FE 35FE 40FE 45FE 50FE 63FE 71FE 80FE 90FE 350FM 315FM 280FM 250FM 220FM 200FM 180FM Prospective Current In Amps RMS Virtual Pre-Arcing Time In Seconds 10–3 104 FE 35-100A & FM 180-350A: 690V Time-Current Curve Prospective Short-Circuit Current Symmetrical RMS Peak Let-Through Current 24 6 24 6 24 6 24 6 101 102 103 104 105 101 102 103 104 105 2 350FM 315FM 280FM 250FM 225FM 200FM 180FM 100FE 90FE 80FE 71FE 63FE 50FE 45FE 40FE 35FE Peak Let-Through Curve Data Sheet: 35785314 Data Sheet: 35785292

For product data sheets, visit www.cooperbussmann.com/datasheets/ulcsa 195 British BS 88 Fuse Accessories High Speed Fuses High Speed Fuses IInnddiiccaattoorr SSyysstteemm TTrriipp--IInnddiiccaattoorrss Trip-indicators are available for use in parallel with the main fuse. They can either be attached to the associated fuse or mounted separately in panel mounted fuse clips, reference CL1. A push-on adapter and microswitch attachment is available for use with the trip indicator to give the facility of remote indication, reference MAI. Fuse ratings of 20A and below cannot usually accommodate a trip-indicator. When a trip-indicator is to be attached to the main fuse an accessory pack comprising a pair of mounting clips and an appropriate trip indicator would be required. The clips are snapped onto the fuse end caps and the indicator is pressed into clips as shown. EElleeccttrriiccaall SSppeecciiffiiccaattiioonnss Type TI500 TI700 Maximum RMS Voltage 500 700 Maximum Peak Voltage 700 1000 Maximum DC Voltage 130 350 Cold Resistance (ohms) 0.3 0.45 Maximum permissible steady-state current 1.5A 1.5A Interrupting Capacity (RMS Symm.) 100,000 100,000 Pre-Arcing I2t2 3 2 3 MMiiccrroosswwiittcchh AAddaapptteerr –– MMAAII We offer a microswitch, complete with adapter for securing the indicator. The microswitch is provided with double pole, single throw contacts, having both a normally open and a normally closed position. A special material has been employed in the construction of the adapter to provide reliable operation in the range of temperatures associated with standard operating conditions and during fuse operation. MMiiccrroosswwiittcchh aanndd AAddaapptteerr TTyyppee MMAAII Current Rating: AC 50/60Hz resistive load @ 250V RMS 4A AC 50/60Hz resistive load @ 127V RMS 6A DC, resistive load @ 110Vdc 0.7A DC DC, resistive load @ 30Vdc 2A DC Maximum Working Voltage: Contact-to-contact (RMS) 1000V Contact-to-contact (RMS) 1500V Maximum DC Volts: 110V DC Ref. Dim. “A” (mm) RMS Volts TI250 37.6 250 TI500 47.5 500 TI600 55.7 600 TI700 61.8 700 TI1100 98.4 1100 TI1500 120.6 1500 TI2000 147.5 2000 TI2500 198.3 2500 RMS For use Kit. Ref. Details Volts with Fuse Ref. EC-250 Fuse Mount 250 LET MC250 Indicator Kits 250 LMT & LMMT EC-600 (Includes one 660 FE, FEE & ET MC600 indicator 660 FM & FMM MC700 and two clips) 700 MT & MMT EC A B D F6 21 0.8 6.8 6.35 NO NC NC NO TTeerrmmiinnaall AArrrraannggeemmeenntt TTrriipp--IInnddiiccaattoorr DDiimmeennssiioonnss -- mmmm DDiimmeennssiioonnss iinn mmmm FFuussee IInnddiiccaattoorr KKiittss 6.0 8.7 50.8 B CCLL11 PPaanneell MMoouunntt CClliippss CL1 Panel mount fuse clips are available for mounting a trip-indicator when mounting directly on the fuse is impractical. Order part number CL1. CCLL11 PPaanneell MMoouunntt CClliipp DDiimmeennssiioonnss -- mmmm Trip Indicator