Why we choose 400kv,220kv,132kv,66kv,33kv transmission
voltages for transmitting power. Why not other voltage
levels.
Answer Posted / prakash krishnappa
Hello
There is no rule to select in multiples of 11kV.
Way back in 1887, when the 1st AC transmission was made in
England, the sending end power station was designed for
10kV. At the receiving end, they witnessed close to 11kV
due to ferranti effect ( named of Engineer Sebastian Ziani
de Ferranti who designed the power station). This lead to
finding out the effect of capacitance on lightly or no load
overhead line on the receiving end voltage. Engineers then
started designing equipment for 11kV and perfected the
egineering design for a max of 12kV for 11kV system. This
is how 11kV was made as starting point. There after, the
Engineers started designing in multiples of 11kV ( no
particular rule though !). In US, you can see 7.5kV,
14.4kV, 161kV, 230kV , 345kV etc which are no where near
multiples of 11kV. Since English people were more daring
and liked travlling for business all over the world, they
took this 11kV( and its multiples) around the world and few
countries like US and some European countries did not take
this 11kV or multiples of 11kV.
Is This Answer Correct ? | 8 Yes | 2 No |
Post New Answer View All Answers
Why it is necessary to isolate fire fighting when you are taking shutdown for lv board.
What is nichols chart?
How the circuit breaker is selected for Induction motor of 100 kW, 415 volt, 0.85 power factor, 0.95 efficiency ?
How much minimum insulation required between 11kv/3.3kv transformer windings?
why do we lay up the core of a cable?
What is resistance of 50meters, 16sq.mm, single core copper cable?
how to select electronic timer(Star-Delta) setting for diff. rating motors
can any tell me why slope 40% and 80% is calculated in differential protection?
5- What is the task (function) of the excitation and isolation transformers in power plant? 6- What is the task (function) of LCI (A), LCI (B) and LCI (COS) in power plant? : LCI (A) and LCI(B) are load commutating inverter for generator turbine starting. , LCI (COS) is load commutating inverter change over switch
why cable i burning without tripping. how can protect led street lights
The capacitive reactance of a capacitor of 1/(2(PI)) F at 10^3 H is
why is the power generator connected as star earthed or star earthed through reactance and what its features ?
how to decide the panel size like MDB ,SMDB PANEL SIZES
how to identify conection leads of an unknown electric motor
What is the slip speed?