Bussmann FWX 250V 35-2500A Electrical Characteristics Ordering Information Dimensions Curves 2 2 I t (A Sec) Rated Carton Current Clearing Watts Part Carton Weight Figure Type RMS-Amps Pre-arc at 250V Loss Number Qty. (lbs) Number BIF 35 50 230 4.2 FWX-35A 40 60 310 5.2 FWX-40A 45 80 390 5.7 FWX-45A 5 1.40 50 100 520 6.0 FWX-50A 60 140 740 8.1 FWX-60A 70 330 1400 7.2 FWX-70A 80 430 1850 8.1 FWX-80A 90 570 2450 9.0 FWX-90A 100 740 3150 10.0 FWX-100A 0.32 359 125 1130 4850 12.5 FWX-125A 150 1620 6950 15.7 FWX-150A 175 2170 9300 18.5 FWX-175A Fig. 1 200 2790 12000 22 FWX-200A 225 3210 14700 24 FWX-225A 250 3960 18100 27 FWX-250A FWX 250V 275 4720 21600 31 FWX-275A 300 6000 27300 32 FWX-300A 350 10600 48600 39 FWX-350A 1 0.52 400 14500 66100 44 FWX-400A 450 22100 101000 49 FWX-450A 500 28000 128000 54 FWX-500A 600 41100 188000 62 FWX-600A 700 48800 190000 72 FWX-700A 0.90 800 59000 230000 84 FWX-800A 1000 44000 360000 100 FWX-1000AH Fig. 2 1200 92000 750000 103 FWX-1200AH 1500 120000 880000 140 FWX-1500AH 35785299 2.86 1600 160000 1200000 140 FWX-1600AH Fig. 3 2000 320000 2300000 151 FWX-2000AH 2500 670000 4700000 163 FWX-2500AH U.L. Recognition on 35 through 800 amperes only. 1 kg = 2.2 lbs 1 lb = 0.45 kg n Interrupting rating 200kA RMS Symmetrical. n Watts loss provided at rated current. n (250 Vdc/Interrupting rating 20kA) U.L. Recognition on 35 through 800 amperes only. Form No. FWX 250 Page 1 of 2 7-11-01 SB01191 BIF Doc 720005 Bussmann FWX 250V 35-2500A 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 1.4 1.0 1.5 Kp U K 1.2 L 0.8 3 10 1.0 0.6 0.5 800 0.4 600 1) 0.5 0.3 500 2) 400 0.2 1) 0.3 0.2 300 2) E g I b Eg 0.1 200 0.15 30 40 50 60 80 90 100% 50 100 150 200 250 70 75 125 200 250 300 1) 35-800 Amp Range 1) 35-800 Amp Range 2) 1000-2500 Amp Range 2) 1000-2500 Amp Range Dimensions Fig. 1: 35-800 Amp Range Fig. 2: 1000-1200 Amp Range Fig. 3: 1500-2500 Amp Range J A A ADCE D C B B C F G H B Order Fig. A B C D E F G H J Thread Depth FWX-35A-60A 1 3.19 0.81 1.59 2.59 2.25 0.34 0.63 0.13 0.52 FWX-70A-200A 1 3.13 1.22 1.59 2.44 2.19 0.34 1.00 0.19 0.47 FWX-225A-600A 1 3.84 1.50 1.59 2.94 2.25 0.41 1.00 0.25 0.75 FWX-700A-800A 1 3.84 2.00 1.59 3.03 2.28 0.41 1.50 0.25 0.78 FWX-1000AH-1200AH 2 2.59 3.00 1.50 Tapped -24 FWX-1500AH-2500AH 3 2.59 3.50 1.50 1.50 Tapped -24 Dimension in inches. 1mm = 0.0394 1 = 25.4mm 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.FWX 250 Page 2 of 2 7-11-01 SB01191 BIF Doc 720005