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An AC voltmeter is ideal. If you really want to get fancy and analytic about it,
you could use data-acquisition equipment to constantly read the AC voltmeter,
and store or record the data.
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∙ 11y ago
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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 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 and swell of voltage?
Sag (dip) a decrease to between 0.1 and 0.9 pu in rms voltage or current at the power frequency for durations of 0.5 cycles to 1 minute. Swell - an increase to between 1.1 pu and 1.8 pu in rms voltage or current at the power frequency durations from 0.5 to 1 minute.
Function of tap chenger in transformer?
The tap changer changes the ratio of primary to secondary windings by physically adding or subtracting windings from the primary or secondary. An on load tap changer (LTC) allows dynamic voltage control, which is important when loading of transformers, and the system in general, varies (if the primary voltage sags, the LTC can be used to increase the secondary voltage so customers don't see this sag).
Why is a sag provided in the transmission line?
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.
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.
What is length of the towers that is used on transmission lines?
That is depends on the factor of sag and clearance required. And also on the level of voltage transmission used.
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 Christmas song first line has the initials SAG SAG?
Silver and Gold.
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.
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.
What is the need of dstatcom?
DSTATCOM is one of the equipments for voltage sag mitigation in power systems. In this paper a new control method for balanced and unbalanced voltage sag mitigation using DSTATCOM is proposed. The control system has two loops in order to regulate compensator current and load voltage. Delayed signal cancellation has been used for sequence separation. The compensator should protect sensitive loads against different types of voltage sag. Performance of the proposed method is investigated under different types of voltage sags for linear and nonlinear loads. Simulation results show appropriate operation of the proposed control system.
What is hot curve and cold curve in the sag template of Transmission line design?
plot of conductor sag and span lengths
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.
Is production of sag is useful for transmission of line?
It's unavoidable.
What is sag and swell of voltage?
Sag (dip) a decrease to between 0.1 and 0.9 pu in rms voltage or current at the power frequency for durations of 0.5 cycles to 1 minute. Swell - an increase to between 1.1 pu and 1.8 pu in rms voltage or current at the power frequency durations from 0.5 to 1 minute.
What is southern point of the Trans Alaska Pipe line?
bob sag it
