® Bussmann British Style BS 88 † ® 690V 6-700A Electrical Characteristics Ordering Information Dimensions Curves 2 2 I t (A S) Rated Carton Current Clearing Clearing Watts Part Carton Weight Figure Type RMS-Amps Pre-arc at 415V at 660V Loss Number Qty. (kg) Number BIF # 6 1.8 8.5 12 2 6CT 10 7 30 48 3 10CT CT 12 10 40 65 3 12CT 20 0.160 Fig. 1 16 16 66 110 7 16CT 20 32 150 220 7 20CT 25 25 150 250 7 25ET 32 32 190 350 11 32ET 35785312 35 52 310 500 11 35ET 40 103 600 900 9 40ET ET 10 0.420 Fig. 2 45 103 680 1100 11 45ET 56 135 950 1500 14 56ET 63 171 1200 2000 16 63ET 80 360 2500 4000 18 80ET 35 33 130 200 9 35FE 40 52 180 300 9 40FE 45 76 270 450 11 45FE 50 103 380 600 11 50FE FE 63 135 480 750 12 63FE 10 0.420 Fig. 2 35785314 71 210 600 950 17 71FE 80 250 900 1500 20 80FE 90 360 1300 2100 20 90FE 100 470 1800 2800 23 100FE 90 490 3000 4500 19 90EET 110 600 4000 6500 27 110EET EET 5 0.450 Fig. 3 35785313 140 1050 7000 12000 35 140EET 160 1500 10000 17000 39 160EET 100 400 1600 2400 24 100FEE 120 540 1900 3100 32 120FEE 140 850 2500 3800 36 140FEE FEE 5 0.450 Fig. 3 35785292 160 1000 3700 5700 46 160FEE 180 1400 5300 8400 46 180FEE 200 1900 7100 11400 52 200FEE 180 1400 7500 13500 40 180FM 200 2600 10500 18500 40 200FM 225 3700 14500 26500 44 225FM FM 250 5200 20500 37500 48 250FM 1 0.240 Fig. 4 35785314 280 7000 30500 55000 48 280FM 315 10000 40000 77000 55 315FM 350 15000 60000 105000 55 350FM 400 10000 40000 72500 85 400FMM 450 15000 60000 105000 90 450FMM 500 20000 82000 150000 100 500FMM FMM 1 0.450 Fig. 5 550 30000 120000 215000 100 550FMM 35785292 630 45000 180000 310000 100 630FMM 700 60000 245000 420000 120 700FMM 160 2400 15000 25000 26 160MT 180 3800 25000 38000 26 180MT 200 6000 40000 58000 27 200MT MT†† 250 11500 80000 110000 32 250MT 1 0.260 Fig. 4 35785313 280 16500 100000 150000 35 280MT 315 19000 125000 180000 42 315MT 355 22000 160000 200000 51 355MT 180 1650 12000 18000 42 180MMT 200 2200 16000 23000 42 200MMT 225 3700 26000 40000 42 225MMT 280 6600 47000 70000 47 280MMT 315 8600 62000 91000 51 315MMT 355 13500 97000 140000 54 355MMT MMT†† 1 .0470 Fig. 5 35785311 400 21000 150000 220000 60 400MMT 450 30000 220000 320000 57 450MMT 500 42000 300000 450000 64 500MMT 560 60000 430000 640000 64 560MMT 630 68500 500000 720000 86 630MMT 710 78000 600000 850000 105 710MMT † U.L Recognition on CT, ET, FE, EET, FEE, FM, & FMM. 1 kg = 2.2 lbs 1 lb = 0.45 kg †† 350 Vdc (IEC) rating. Consult Bussmann for U.L. Recognition status. n Interrupting rating 200kA RMS Symmetrical. n (500 Vdc/Interrupting rating 50ka) U.L. Recognition for CT, ET, FE, EET, FEE, FM & FMM. n Watts loss provided at rated current. n Note: FC, 8ET, 12ET, 15ET, 20ET, 65EET and 75EET are available for replacement purposes on existing equipment. Form No. Page 1 of 2 7-18-01 SB01191 BIF Doc #720024 ® Bussmann British Style BS 88 ® 690V 6-700A Electrical Characteristics 2 Total Clearing I t Arc Voltage Power Losses 2 The total clearing I t at rated voltage and This curve gives the peak arc voltage, Watts loss at rated current is given in at power factor of 15% are given in the U , which may appear across the fuse the electrical characteristics. The curve L electrical characteristics. For other volt- during its operation as a function of the allows the calculation of the power 2 ages, the clearing I t is found by multi- applied working voltage, E , (RMS) at a losses at load currents lower than the g plying by correction factor, K, given as power factor of 15%. rated current. The correction factor, K , p a function of applied working voltage, is given as a function of the RMS load E , (RMS). current, I , in % of the rated current . g b 1.0 1.6 Kp U K L 0.8 1500 1.4 1) 0.6 1.2 0.5 0.4 1.0 1000 2) 0.8 0.3 0.6 0.2 500 0.4 1) 2) 0.2 I E 0.1 b g E g 30 40 50 60 70 80 90 100% 200 400 600 660 200 300 400 500 600 660 1) CT, ET, EET, FE, FEE, MT, MMT 1) CT 2) FM, FMM 2) ET, FE, EET, FEE, FM, FMM Dimensions Fig. 1: CT Fig. 2: ET, FE Fig. 3: EET, FEE 4 8.7 7.1 5.5 46 70 94 54.8 64.3 74.6 48 63.5 77 11.9 9.7 31.8 12.7 6.4 17.1 37 8.7 8.7 Fig. 5: FMM, MMT Fig. 4: FM, MT 19 25.4 19.1 25.4 “A” Type Dimension 50 A 113 FM 80-85 50 A 113 FMM 80-85 MT 85 MMT 85 14 13.5 10.3 10.3 83 Dimensions in mm. 41 1mm = 0.0394• 1• = 25.4mm 38.1 38 The only controlled copy of this BIF document is the electronic read-only version located on the Bussmann Network Drive. All other copies of this document are by definition uncontrolled. This bulletin is intended to clearly present comprehensive product data and provide technical information that will help the end user with design applications. Bussmann reserves the right, without notice, to change design or construction of any products and to discontinue or limit distribution of any products. Bussmann also reserves the right to change or update, without notice, any technical information contained in this bulletin. Once a product has been selected, it should be tested by the user in all possible applications. Form No. Page 2 of 2 7-18-01 SB01191 BIF Doc #720024