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A wire is placed on the top of a transmission line to?
Ground wireAnswerIt's a (lightning) protection wire, designed to protect the line conductors from lightning strikes.
Calculations on input impedance of a transmission lines?
I assume you are wanting to know about balancing networks to a transmission line? If this is the case, you really need to get a book on networks and filters. The physical makup of the transmission line will impact this calculation. The basic idea is you want to match the impedance at the input (looking out of the transmission line) to the same impedance as the transmission line (say 50 or 75 ohms for typical coax), and the output impedance (looking out of the transmission line) to the same as well. This will result in maximum power transfer, minimum power reflection. If you want to know how to make a balancing filter to a transmission line, then you need to design the filter according to your requirements - chebyshev, minimum ripple, wide band, narrow band, etc; You may need to use transformers to isolate the transmission line from your power circuitry, and use this as a matching network. You could also use transistors to accomplish similar things (less isolation, though), depending on what you're trying to do.
Why phases in transmission line are transposed?
Image result for Why phases in transmission line are transposed?Transposition is the periodic swapping of positions of the conductors of a transmission line, in order to reduce crosstalk and otherwise improve transmission. ... Transposition also equalizes their impedance relative to the ground, thus avoiding one-sided loads in three-phase electric power systems.
What would be minimum capacity of transformer betweed generator and 220 kV transmission line system?
At a minimum, the main step up transformer for a generator should carry 105% of the full MW output of the generator.
Will low pass filter works as transmission line?
No, but transmission line act as a lpf
Minimum ground clearance for 765 kv Transmission Line?
Ground clearance132 kv - 6100 mm220 kv - 7015mm400 kv - 8840mm765 kv - 15000mm
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 the height of tower in 220KV double circuit HT line?
min 18 mtr tower used or ground clearance maintain as IE rule for 220kv transmission line Rakesh vishwakarma
What are the types of transmission line faults?
these are the faults that occur in transmission line: 1. line to line fault 2. line to ground fault-this is the most common fault that occurs in tr. line(75%) 3. double line to ground fault 4. triple line to ground (or) 3 phase fault- this is the most serious and dangerous fault that occurs in transmission line.(but rarely occurs)
Is transmission voltage a phase to phase voltage or a phase to ground voltage?
Phase to Phase voltageCorrection to the above answer:There is no such thing as a 'phase-to-phase' or 'phase-to-ground' voltage. The correct terms are 'line-to-line' (or 'line voltage') and 'line-to-ground' (or 'phase voltage'). Transmission-line voltages are line-to-line (or 'line') voltages.
What are the types of faults in ehv transmission lines?
The three types are Line to ground faults line to line fault double line to ground fault three phase line to ground fault
To avoid arcing in transmission lines?
Keep all conductive objects a sufficient distance from the line. Minimum distance depends on the voltage on the line.
What are the metal towers that hold the cables high above the ground called?
transmission line tower
A wire is placed on the top of a transmission line to?
Ground wireAnswerIt's a (lightning) protection wire, designed to protect the line conductors from lightning strikes.
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 much harizontal and vertical line clearance is required in 33kv and 11kvphase to phase and phase to ground?
The minimum separation for a voltage of 34.5kV and conductor spans of 50 meters or less is 600 mm. The vertical clearance is 6.7 meters . For countries that never changed to the metric system 50 meters is about 150 feet and 600 mm is about 24 inches, 6.7 meters is about 22 feet. The minimum separation for a voltage of 15 kV and conductor spans of 50 meters or less is 400 mm. The vertical clearance is 6.1 meters.
Calculations on input impedance of a transmission lines?
I assume you are wanting to know about balancing networks to a transmission line? If this is the case, you really need to get a book on networks and filters. The physical makup of the transmission line will impact this calculation. The basic idea is you want to match the impedance at the input (looking out of the transmission line) to the same impedance as the transmission line (say 50 or 75 ohms for typical coax), and the output impedance (looking out of the transmission line) to the same as well. This will result in maximum power transfer, minimum power reflection. If you want to know how to make a balancing filter to a transmission line, then you need to design the filter according to your requirements - chebyshev, minimum ripple, wide band, narrow band, etc; You may need to use transformers to isolate the transmission line from your power circuitry, and use this as a matching network. You could also use transistors to accomplish similar things (less isolation, though), depending on what you're trying to do.
