Bussmann ® Ferrule 20-100A FWP 660V/700V (IEC/U.L.) Electrical Characteristics I2t (A2S) Rated Current Clearing RMS-Amps Pre-arc at 660V Size 20 23 25 37 32 55 22 ≈ 58mm 40 68 (‡Ω•∑) 50 155 63 280 80 600 100 1100 n Interrupting rating 200kA RMS Symmetrical. n Watts loss provided at rated current. n Consult Bussmann for DC ratings. n See accessories on page 90. ® Ordering Information 260 410 605 750 1600 3080 6600 12500 Watts Loss Part Number Carton Qty. Carton Weight (kg) 4.6 5.6 7.0 8.5 9.5 11 13.5 16 FWP-20A22F FWP-25A22F FWP-32A22F FWP-40A22F FWP-50A22F FWP-63A22F FWP-80A22F FWP-100A22F 10 0.450 Dimensions Curves Figure Number See Page or (BIF #) Fig. 1 page 95 (35785291) 1 kg = 2.2 lbs. 1 lb = 0.45 kg Dimensions Fig. 1: 20-100 Amp Range 58.0 (2.283") 22.2 (0.875") 15.0 (0.591") Dimension in mm. 1mm = 0.0394∑ 1∑ = 25.4mm 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). 1.4 1.2 1.0 0.9 0.8 0.7 0.6 1.4 1.2 103 9 8 7 6 K 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 UL 0.6 0.5 0.4 0.3 5 0.5 0.2 4 0.4 0.3 200 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%. Eg Eg 300 400 500 600 3 700 200 300 400 500 600 700 0.1 30 40 50 Ib 60 70 80 90 100% 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. FWP Page 1 of 1 BIF Doc #720026