sir,
how to select the cable size, what is the parameters use
ang what is the formulas use for this cable size
calculations. please tell me.
- 4 Answers
- 13178 Views
- ISRO, Power Grid, I also Faced
- E-Mail Answers
Answer Posted / raul
cable size depends upon THE MOST ECONOMICAL CONDUCTOR SIZE
concept in which the size depends upon the max. dielectric
stress on the conductor..........i.e. g(max.)= 2V/dlogD/d,
where V=voltage, x= distance from the conductor centre,
D=sheath diameter, d=conductor diameter........by
differentiating above relation n equating to zero......we
get logD/d=1 i.e. d=D/2.718...........
| Is This Answer Correct ? | 2 Yes | 1 No |
Post New Answer View All Answers
how to calulate short circuit current for the following: 1.cable connecting 11KV of 22KV/11KV transformer to 11Kv of 11KV/415V transformer 2.what cable size should i use.
what is the effect of connecting three phase supply lines to three phase auto transformer output terminals through a fuse of 10Amp and a circuit breaker (MCB). Is this connection permanently destroy the transformer?
Define resonant peak?
why ct's&pt'S out put called as burden,why compelsary short ckt the secondary of ct's while removing the burden?
in indoor type circuit breakers why only the corner breaker trips specially during cold season. What is the reason.
Why the power factor improvement is so important in industrial loads
how can decide the current rating of oltc
How it can worked plc based electrical system And which type of software using.
What are test values for an 63 KVA and 100 Kva Distribution Transformers for the following typical tests 1)Magnetic balance 2)Short circuit test 3)Open Circuit test 4)Vector group confirmation test .please give me the standard values for all the above tests.
DESCRIBE THE CONSTRUCTION ANDOPERATION OF BELT CONVEYORS AND SCR CONVEYORS , DRAW NEAT SKETCHES
Thumb rule of cable size(rm>30 rm)X multiplying factor=ampere
if the armature current in a dc generator is ac ( sinusoidal ) why doesnt the sjhape af armature mmf a sinusoidal (ni) ? armature mmf in case of a dc machine is triangular.
Draw the vector diagramme for Asynchronous Induction Generator at noload,half load and fullload.
Plz tell me how we can find that particular company has vacancy or not
What should be the voltage between Neutral and Ground in secondary side of the step down transformer (230 V to 110 V) with no load condition?
