why in 3.5 core means 3 core for phase and .5 for neutral?



why in 3.5 core means 3 core for phase and .5 for neutral?..

Answer / k.prakashchandra

Neutral current is undesirable . If 3 phase appliances are predominant or single phase loads are balanced, . the neutral current will be small . Further in protection scheme, the EFR is normally set at 20 % of the rated current . Hence main neutral conductor may be of half the size of phase conductors to save money .

Is This Answer Correct ?    3 Yes 1 No

Post New Answer

More Electrical Engineering Interview Questions

what is the purpose of using semiconductors in HT cables

3 Answers   Sterling,


what sq.mm copper pvc wire need for ac load current 25amps for 230v ?

4 Answers   Khadamat, Siemens,


What is class 2 coordination ?

2 Answers  


If there is no problem with the electronic circuit and regulator then why the motor start rotating at low value of regulator with full speed both at laod and no load??? and if my judgement of circuit is wrong then what is your openion?

1 Answers  


I have a transformer 3phase 11kv/410v and its name plate missing. now how can I judge its rated kva?

2 Answers   Coca Cola,






what is protections used for 6.6kv ht motor

2 Answers   OEG,


Alternator couple to diesel engine why, Alternator couple to ac service motor with gear drive for 1500 rpm possible (yes or no) aim to low input power supply give to motor then high output power taken for alternator Please answer this question

1 Answers   Turbo,


describe the Operation of induction generators from bus bars

0 Answers   AMIE,


Which type starter is used for synchronous motor?

2 Answers   Equate,


How can we parallel two transformer with vector gorup YNd11 and YNd1?How is connection two transformer GT?

3 Answers  


which type of motor is suitable for water pump?

1 Answers   IIM,


what will be project cost for 100 kv transformer connection under oyt scheme.

0 Answers  


Categories
  • Civil Engineering Interview Questions Civil Engineering (5085)
  • Mechanical Engineering Interview Questions Mechanical Engineering (4451)
  • Electrical Engineering Interview Questions Electrical Engineering (16632)
  • Electronics Communications Interview Questions Electronics Communications (3918)
  • Chemical Engineering Interview Questions Chemical Engineering (1095)
  • Aeronautical Engineering Interview Questions Aeronautical Engineering (239)
  • Bio Engineering Interview Questions Bio Engineering (96)
  • Metallurgy Interview Questions Metallurgy (361)
  • Industrial Engineering Interview Questions Industrial Engineering (259)
  • Instrumentation Interview Questions Instrumentation (3014)
  • Automobile Engineering Interview Questions Automobile Engineering (332)
  • Mechatronics Engineering Interview Questions Mechatronics Engineering (97)
  • Marine Engineering Interview Questions Marine Engineering (124)
  • Power Plant Engineering Interview Questions Power Plant Engineering (172)
  • Textile Engineering Interview Questions Textile Engineering (575)
  • Production Engineering Interview Questions Production Engineering (25)
  • Satellite Systems Engineering Interview Questions Satellite Systems Engineering (106)
  • Engineering AllOther Interview Questions Engineering AllOther (1379)