It isn't. In the UK, transmission and distribution voltages are 400 kV, 275 kV, 132 kV, 66 kV, 33kV, and 11 kV.
220v, 415v, 6.6 kv, 11kv,33kv,132kv,400kv
600mm is the distance between two conductors in 11kv line
Actually surge impedance is present in a transmission line due to the capacitance of transmission line. Now this capacitor attends the reactive power of the transmission line to energise its magnetic flux. now due to the flux the impedance will increase and the power is reactive too. due to the impedance loss is more.
one insulator unit can bare 11kV. such that 66kV tx line needs 6 insulator units.
Check the power steering and transmission fluids to make sure that they are at correct levels. If the leaking one is not low, then clean the areas where fluid is showing and keep checking to see where the leak is. Check all line connections in both systems for visible leaks.
Actually in networks we will consider the elements like resistance, inductance, capacitance as lumped elements for simplicity, like this in power systems we will consider the transmission line parameters(resistance, inductance, capacitance) as lumped elements, because we will calculate all the parameters of power systems with respect to receiving end or sending end but not with respect to middle of the line. If a fault occurs on transmission line then we should not consider the lumped elements of that total transmission line, we should consider the lumped elements from sending end to the point where the fault is occurred.
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.
owing to its advantages of carrying large amount of power compared to the remaining systems .. 3 ph is widely used.
TRANSMISSION LINE LOSSES
what is the value of the capacitance in the transmission line to earth, i know it is different for different values ,i mean for 11KV,33Kv and so on, but don't know how much
theriyathu
All a.c. transmission systems are three-phase systems, which comprise three line conductors which are suspended from towers. Each 'line' is generally made up of a number of 'bundled' conductors -according to the transmission voltage- to reduce the electrical stress. Many transmission towers carry two separate three-phase circuits, one on each side of the tower.