ALLInterview.com :: Home Page            
 Advertise your Business Here     
Browse  |   Placement Papers  |   Company  |   Code Snippets  |   Certifications  |   Visa Questions
Post Question  |   Post Answer  |   My Panel  |   Search  |   Articles  |   Topics  |   ERRORS new
   Refer this Site  Refer This Site to Your Friends  Site Map  Bookmark this Site  Set it as your HomePage  Contact Us     Login  |  Sign Up                      
Google
   
 
Categories >> Engineering >> Electrical Engineering
 
 


 

 
 Civil Engineering interview questions  Civil Engineering Interview Questions (3154)
 Mechanical Engineering interview questions  Mechanical Engineering Interview Questions (3310)
 Electrical Engineering interview questions  Electrical Engineering Interview Questions (13485)
 Electronics Communications interview questions  Electronics Communications Interview Questions (2395)
 Chemical Engineering interview questions  Chemical Engineering Interview Questions (424)
 Aeronautical Engineering interview questions  Aeronautical Engineering Interview Questions (77)
 Bio Engineering interview questions  Bio Engineering Interview Questions (17)
 Metallurgy interview questions  Metallurgy Interview Questions (80)
 Industrial Engineering interview questions  Industrial Engineering Interview Questions (166)
 Instrumentation interview questions  Instrumentation Interview Questions (2409)
 Automobile Engineering interview questions  Automobile Engineering Interview Questions (109)
 Mechatronics Engineering interview questions  Mechatronics Engineering Interview Questions (38)
 Marine Engineering interview questions  Marine Engineering Interview Questions (45)
 Power Plant Engineering interview questions  Power Plant Engineering Interview Questions (81)
 Engineering AllOther interview questions  Engineering AllOther Interview Questions (1207)
Question
how to calculate the size of cable for 100 kva load,?can 
somebody tell me with a formula
 Question Submitted By :: Electrical-Engineering
I also faced this Question!!     Answer Posted By  
 
Answer
# 1
KVA=uder root3*V*A/1000
A=Under root 3*415*KVA/1000
 
Is This Answer Correct ?    17 Yes 5 No
Prashant Singh
 
Answer
# 2
Considering Powe factor 0.8
Kw = KVA*.08
KW = 100*0.8
= 80 KW
w = 1.73 * 415 * Il * 0.8
80000 = 1.73 * 415 * I1 * 0.8
I = 80000/ 1.73*415*0.8
= 139 Amp

You can choose the cable which current carring capacity per
phase is on or above 140 Amp

By considering the future expansion of load the 180 Sq.mm
AYFY cable is ideal.
 
Is This Answer Correct ?    11 Yes 1 No
Virendra
 
 
 
Answer
# 3
WE CAN GET FROM THIS REALTION
KVA=KW/KVAR
100*85=85KW
THEN FIND CURRNET FROM P=ROOT 3 VICOSPHI FORMULA THEN FIND
CURRENT AND THEN LENTH FROM THE MV=VD*1000/L*I
 
Is This Answer Correct ?    9 Yes 5 No
Abdulsubur
 
Answer
# 4
Before calculating size of cable, phase & voltage should be
clear then after we can calculate the current of load by
this formula
P=root3*V*I
I=P/(root3*V)
Accodingle we can select the size of cale.
 
Is This Answer Correct ?    6 Yes 2 No
Brijesh Shakya
 
Answer
# 5
Depends on what voltage you working with.

P = V*I

You got P and V, find what your I is.

Then use a cable selection book from, eg. Olex, choose your
cable from there.
 
Is This Answer Correct ?    6 Yes 13 No
Jack
 
Answer
# 6
i think something is wrong with question ...load can never
be in KVA it should in kw if we talk about motor.....
 
Is This Answer Correct ?    4 Yes 14 No
Jiwanjot
 
Answer
# 7
if your load is single phase then you should use 3.5c x 185
sq.mm alu. Armoured cable.
 
Is This Answer Correct ?    0 Yes 10 No
Mehul G. C.
 

 
 
 
Other Electrical Engineering Interview Questions
 
  Question Asked @ Answers
 
Why celing fans will rotate slowly after some days.?   1
difference between elcb and rccb ITC-Infotech 3
what is "pu" in electrical engg.   4
What is the difference between Analogue Addressable Systems and intelligent Addressable Systems   1
I have current, kva How can calculate kv?   3
Ns=120f/p. what is 120? Ramada 8
what is the function of compressor?   2
string efficient is 100% what is the voltage across the each disk?   1
if a motor has 1500rpm then what will its HP?   3
please tell me formula of 3 phase induction motor under condition{1]when we 3 phase motor starts without load in star or delta connection?thanks   1
What is Fan Coil Unit . How can we calculate CFM .   2
why we used capacitor in induction motor? Mitsubishi 4
 
For more Electrical Engineering Interview Questions Click Here 
 
 
 
 
 


   
Copyright Policy  |  Terms of Service  |  Articles  |  Site Map  |  RSS Site Map  |  Contact Us
   
Copyright 2013  ALLInterview.com.  All Rights Reserved.

ALLInterview.com   ::  KalAajKal.com