Question

Q1//An overhead line with stranded copper conductors is supported on two pols 200m a part having a difference in level of 10 meters. The conductor diameter is 2cm and weighs 2.3kg per meter length .Calculate the sag at the lower support under the conditions if wind provides a pressure of 57.5 kg per square meter of the projected area and a factor of safety is 4.The maximum tensile strength of copper is 4.220 kg per square cm إجابتك

Answer 1

Qu h =lom 9 - 200m diameter, d = 2cm weight, W 2.3kg/m 2 X10 - 2 VM ? Sag, s safely barton = 4 Actul strength wind presente = p = 57.5 kg/ha wan. tensile strength 4.220 kg/cv 4 cm" ultimele strenght safety farlon mall. (8) ultimde strength 4.220 K kg/m² = 4.220 X10 kg/m Actud strength, Ta 4.220x104 => 10.5 51 io 4 o ISAL SAL s 11 Wq x, 2 I = Th ta / 2 H- % W, P Wt ar watwa wind passie x [ x 24) x] 57.5X (2 X162) X W wewa 1.15 Kg/u 4 (2.3) 7(1.15) 2.57 k9/1 WE

3 10.55x10 xio 200 KI re 2 2-3 X 200 - 129.9 meleis 12 S : 2.57 X (-129.9) 2 x10.55 X103 sag 2.0.37 1 9 meters