Answer / a.ramaprasd

1. Economical. Aluminium is available in plenty. Current
flow is also less there fore conductor size is also less.

2. Considering economy we can use GI wire also , but it
will rust in due course , more rigid weighs more.

3. Cu 9 copper ) is better but it is expensive.Therefore
Alu minium is the best and wise choice.

Answer / narendra mahadik

Due to low weight of aluminium as compare to copper and
easy to install. Sag is also minimum between the two polls.

Answer / ha ha

There are two reasons
1. Economical.
2.Aluminium conductors do not produce electromagnetic
fields.Hence Electromagnetic Interference is less.Hence
they are used for HT lines.

Answer / vilas

weight and cost & conductance are three factors are more
important for transmission lines, So aluminium is selected
to transmit power, as it is light weighted , cost also less
than copper, as weight is less the construction cost of
tower is less.

Answer / parth

Since it is plenty in earth and less costly so way is their to be theft an has high resistivity so wire should be thin so that current can flow

Answer / shubham batham

The conductivity of the silver is more than copper. and the conductivity of the copper is more than Aluminium, but As per availability of material in nature the Aluminium is used. other fact it is cheap and easily available. it is lighter so we choose Aluminium.

how can we calculate that how much capacitor is needed for a system to increase the pf?

5 Answers  

If 440 V supply has given at the secondary winding of transformer at that time if we apply 11 KV at primery then what will happen???????

4 Answers  

At site, we have 30Kw motor (3 phase, 400V,50Hz) and FLC 54A as per the nameplate. At the time of starting it draws 840A instead of 390A (7.2%). As per the data sheet also its 390A starting current. it thru a dol starter from the MCC. can anyone tell what is the problem in the motor

5 Answers   ME,

What will happen if i connect two 3-phase tranformers secondary supply on one bus bar that is R-Y-B-N?

2 Answers   GMR,

I have draw the 350A DC current, so what is the size of cable i can use? Give me the answer with formula

1 Answers  

How to calculate the sag of OPGW during stringing???

0 Answers  

What is the difference between PS & metering CT (5p20,0.5 etc.)? Why in PS class CT only Vk is given ? Is PS class CT is more accurate than metering CT?

0 Answers  

what is the difference between isolation and insolation ? please explain in detail with example.

5 Answers   ABB,

We have one 500KVA transformer. We have tested REF relay and commissioned. After one and half year, due to some ground fault in one of the DB circuit Transformer tripped by REF relay. What will be cause and remedy. Please advise?

1 Answers  

Why IR value of the (HT cable Plus synchronous motor) is less while individually having IR values in GΩ?

0 Answers  

SIR, GIVE ME OPGW SAG CALCULATION FORMULA I AM DAE ELECTRICAL. THANKS

2 Answers  

if a.c supply is given to the motor,, what happen?

0 Answers   Bhel, L&T, MSEB,