Electric Power Generation, Transmission, and Distribution

The calculation of ice loads on conductors is normally done with an assumed glaze ice density of 57 lb=ft^3. The weight of ice p ...

wherewb ¼bare conductor weight per unit length, lb=ft wi ¼weight of ice per unit length, lb=ft ww ¼wind load per unit length, lb ...

Note that the conductor length depends solely on span and sag. It is not directly dependent on conductor tension, weight, or tem ...

For example, if the temperature of the Drake conductor in the preceding example increases from 60 8 F (15 8 C) to 167 8 F (75 8 ...

This ZTL(Tcdr) is the conductor length attained if the conductor is taken down from its supports and laid on the ground with no ...

Note that the balance of thermal and elastic elongation of the conductor yields an equilibrium tension of approximately 3700 lbs ...

The preceding approximate tension calculations could have been more accurate with the use of actual stress-strain curves and gra ...

Figure 14.8is a stress-strain curve (Aluminum Association, 1974) for an all-aluminum 37-strand conductor ranging in size from 25 ...

elongation will reduce along a curve parallel to the final curve, but the conductor will never return to its original length. Fo ...

curves, the conductor elongation from the initial elongation of 0.062% increases to 0.11%, 0.12%, and 0.15%, respectively. Becau ...

1000 and 300 ft. Typical tension constraints of 15% final unloaded at 60 8 F, 25% initial unloaded at 60 8 F, and 60% initial at ...

TABLE 14.6 Sag and Tension Data for 795 kcmil-26=7 ACSR ‘‘Drake’’ 600-ft Ruling Span Conductor: Drake 795 kcmil-26=7 ACSR Span¼6 ...

TABLE 14.8 Time-Sag Table for Stopwatch Method Return of Wave Sag, in. 3rd Time, sec 5th Time, sec Sag, in. 3rd Time, sec 5th Ti ...

14.3.2.2 Special Aspects of ACSR Sag-Tension Calculations Sag-tension calculations with ACSR conductors are more complex than su ...

14.4 Ruling Span Concept Transmission lines are normally designed in line sections with each end of the line section terminated ...

difference between the initial and final limits at 60 8 F is approximately 460 lb. Even the initial tension (equal at 60 8 F) di ...

whereRS¼Ruling span for the line section containingnsuspension spans S 1 ¼Span length of first suspension span S 2 ¼Span length ...

conductor tension is increased until the sag in one or more suspension spans reaches the appropriate stringing sags based on the ...

the various stages involved in the design and construction of the line. These drawings, prepared based on the route survey, show ...

overloading, assure ground clearance is sufficient at all points along the right-of-way, and minimize blowout or uplift under co ...