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| Bussmann Ferrule (R) FWJ 1000V Size 20-30A Ordering Information Watts Loss Part Number Carton Qty. Carton Weight (kg) Dimensions Figure Number (R) Electrical Characteristics I2t (A2S) Rated Current Clearing RMS-Amps Pre-arc at 1000V Curves See Page or (BIF #) 14 67mm (*) 20 25 25 33 30 52 Interrupting rating 200kA RMS Symmetrical. Watts loss provided at rated current. 800 Vdc U.L. Recognized. See accessories on page 90. 220 350 450 9 11 14 FWJ-20A14F FWJ-25A14F FWJ-30A14F 10 0.300 Fig. 1 page 96 (35785315) 1 lb = 0.45 kg 1 kg = 2.2 lbs. Dimensions Fig. 1: 20-30 Amp Range 66.7 (2.626") 14.5 (0.571") Dimension in mm. 1mm = 0.0394 1 = 25.4mm 15.9 (0.625") Electrical Characteristics Total Clearing I2t The total clearing I2t at rated voltage and at power factor of 15% are given in the electrical characteristics. For other voltages, the clearing I2t is found by multiplying by correction factor, K , given as a function of applied working voltage, E g , (RMS). 1.5 K Arc Voltage This curve gives the peak arc voltage, U L , which may appear across the fuse during its operation as a function of the applied working voltage, E g , (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, K p , is given as a function of the RMS load current, Ib , in % of the rated current . 1.0 Kp 0.8 0.6 0.5 0.4 0.3 2000 UL 1600 1200 1.0 0.5 800 0.3 0.2 0.15 680 800 Eg 0.2 400 Eg 200 600 1000 1400 1800 0.1 30 40 50 Ib 60 70 80 90 100% 1000 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. 12-28-98 SB98107 Rev. A Form No. FWJ 1000 Page 1 of 1 BIF Doc #720028 |
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