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- A portion of an overhead conductor is taken to be s metres long. The tension in the conductor is T Newton metres. The unit weight of the conductor is given as W Newton per metre. The line tension, T has a horizontal component of To and a vertical component of Wx. S makes an angle, α with the horizontal plane. Derive a equation for s in terms of T. A mass of 1000kg transformer is mounted vertical on circular rod of length 8m, supporting with a base radius 50cm. What? would be the stress experienced at the base of the rod?An overhead line has span of 260m. The tension in the line is 1200kg while the conductor weighs 650 kg per 100 meters. Calculate the maximum SAG in the conductor. If the height of the tower is 13 meters, estimate the clearance of conductor to the ground. Draw a figure and mark values of sag, clearance, span, height of conductor etc.
- Define and sketch uniform and non uniform field, give examples of each.Electrical transmission towers are stationed at 350 m intervals and a conducting cable 2cm in diameter is strung between them. How many wires should each tower carry toensure structural integrity during a tropical storm? The towers are designed to withstandup to 180 kN of transverse force and during a cyclone, wind can blow up to 200 km/h.Assume there is no interference between the wires and take air density as 1.2 kg/m3and viscosity as 1.7×10-5 Nsm-2 . If the smooth insulation on the wires is mechanicallyroughened up before application what effect it will have on the design? Also, establishwhether the wires are likely to be subjected to self-induced vibrations and if so what the frequency would be. The frequency of such forced vibration, sometimes called self-induced vibration, may be calculated from an empirical formula due to Vincent Strouhal: fd⁄Uo = 0.198(1 − 19.7⁄Re) 250 < Re < 1055. Assignment 1: Derive the microscopic model of current. Explain each step carefully with diagram. Hand written. Explain the Random, and drift velocity. Give values.
- Rigid metal conduit (RMC) is a threadable raceway of ____ designed for the physical protection and routing of conductors and cables. Select one: A. AN INCOMPRESSIBLE MATERIAL B. GALVANIZED STEEL C. VARIOUS BENDING RADII D. CIRCULAR CROSS SECTIONDerive the microscopic model of current. Explain each step carefully with diagram. Hand written. Explain the Random, and drift velocity. Give values.A three phase, 11 KV, underground cable system, consider a single core of conductor radius 0.5 cm diameter and lead sheath of 1.25 cm. The core and lead sheath have been separated by two intersheaths with radius 0.75 cm and 1 cm. Draw the cable core, dielectric and intersheath layers showing the thickness of each layer, then determine the voltages on the both intersheaths. Suppose the maximum stress on the layers are the same.
- In free space, q1= 3nC and q2= -4nC are located in the form of load axes, as well as at the base y=1 and y=6 on the y-new. Accordingly, how many volts is the electric potential value at the origin?A three phase, 33 KV, underground cable system, consider a single core of conductor radius 0.8 cm diameter and lead sheath of 2.3 cm. The core and lead sheath have been separated by two intersheaths with radius 1.3 cm and 1.8 cm. Draw the cable core, dielectric and intersheath layers showing the thickness of each layer, then determine the voltages on the both intersheaths. Suppose the maximum stress on the layers are the same. Please i need it know pleaseQ4. A Transmission Line has a span of 250 meters between two level supports. The conductor has a cross-sectional area of 1.29 cm2, weighs 1170 kg/km and has a breaking stress of 4218 kg/cm2. Calculate the sag for a safety factor of (5), allowing a wind pressure of 122 kg per square meter of projected area. What is the vertical sag?