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Sag is provided in transmission lines in order to lessen the tension of the transmission lines. Sag literally means to be bend in shape. In overhead transmission lines , the difference in level between points of supports (towers or utility poles) and the lowest point on the conductor is called a sag.
Explanation: While erecting an overhead line, it is very important that the conductors are under safe tension. If the conductors are too much stressed between the supports ( towers, utility poles), then the stress on the conductors may reach to an unsafe level and the conductor may break due to excessive pressure ( i,e tension). in order to permit safe tension in the conductors, the conductors ( i.e the transmission lines) are not fully stretched but are allowed to have a dip or a sag.
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What is the definition of Sag current in transmission line?
sag means the deepest point of the conductorAnswerSag is defined as follows: 'Sag, under any system of conductor loading, is the distance measured in the direction of the resultant load, between the conductor and the midpoint of a straight line joining adjacent supports'.So, draw an imaginary line beween two adjacent supports (towers or poles) and, from the midway point, draw a vertical line to where it intersects the conductor, and that vertical line represents the sag.
Why do power lines have a slack?
Overhead lines have 'sag' (not 'slack') because the conductors need to be able to expand and contract as the temperature changes. If sag isn't built into the design of the line then, when the conductors contract, they will put undue lateral strain on the supporting poles or towers. It is important that, with maximum sag, the minimum clearance distance between the line conductors and the ground below is always maintained. This safety clearance increases, of course, with line voltage. Allowing for the necessary sag part of the design-process for any overhead line, and achieving it becomes the responsibility of the linesmen when the line is eventually constructed.
What is pg clamps in transmission line?
pg clamp is known for parallel groove clamp,especially used in transmission line to hold transmission conductors in parallel.
What is the line voltage of a 230000 kv transmission line?
Transmission and distribution voltages are normally expressed in terms of line voltages, so the answer is that the figure you quote is a line voltage. Incidentally, do you really mean 230 megavolts for a transmission voltage?? And the symbol of kilovolt is 'kV', not 'kv'.
Which type of transmission line will have max value of characteristic impedence?
coaxial cable
Is production of sag is useful for transmission of line?
It's unavoidable.
Why sag setting in Transmission line?
The sag setting is necessary because it is physically impossible to have a suspended line with no sag. The sag is specified because there has to be a minimum clearance value for the height above ground at the centre of the sag where the cable is at its minimum height.
What is hot curve and cold curve in the sag template of Transmission line design?
plot of conductor sag and span lengths
Why electric transmission lines between two poles are found to sag in summer?
The metal conductor in the line contracts in the cold of winter making the line more taunt, and expands making the line longer in the summer's heat. Thus the summer 'sag.'
What is the definition of Sag current in transmission line?
sag means the deepest point of the conductorAnswerSag is defined as follows: 'Sag, under any system of conductor loading, is the distance measured in the direction of the resultant load, between the conductor and the midpoint of a straight line joining adjacent supports'.So, draw an imaginary line beween two adjacent supports (towers or poles) and, from the midway point, draw a vertical line to where it intersects the conductor, and that vertical line represents the sag.
What is sag in transmission lines?
Catenary
Sag produced in the conductor of a transmission line depends on?
-The tension of the cable (the tighter, the less sag, but this can cause other problems if too tight) -The temperature outside (the higher the temperature, the more it will sag) -The amount of current flowing through the cable (the more current, the hotter the conductor will get = more sag) -The type of cable (aluminimum will sag more than copper; ACSR will sag less than straight aluminimum).
Why mutual compensation is provided in double circuit transmission line?
To compan
What Christmas song first line has the initials SAG SAG?
Silver and Gold.
How do sag's in power transmission formed?
The plural of sag is sags, not sag's! Sag is caused by the weight of the conductor between its supports, and is (a) unavoidable and (b) necessary to allow for the conductor's expansion and contraction during variations in temperature. When surveyors design a power line, the amount of necessary sag is calculated and built into the design, while ensuring that the clearance between the conductor and the ground remains within safe limits.
How do you join SAG?
get a line in a sag tv show or movie (taft hartly), get a principal role in aftra role or 3 sag vouchers.
How do you generate online sag?
A power line's 'sag' is the perpendicular distance between the lowest part of a conductor and an imaginary line drawn between the cross arms of two adjacent poles or towers. Sag varies with temperature, increasing as the temperature increases, due to the expansion of the conductor. Sag is necessary to reduce the strain applied to the conductor and its insulators. Regardless of the amount of sag, the lowest point along the conductor must never fall below the clearance height established for the voltage level of the line. The amount of sag is established by the surveyor/draughtsman responsible for profiling the line, and set by the linesmen erecting the line.
