irfan ullah khan


{ City } d.i.khan
< Country > pakistan
* Profession * electrical engineer
User No # 112638
Total Questions Posted # 2
Total Answers Posted # 4

Total Answers Posted for My Questions # 1
Total Views for My Questions # 7873

Users Marked my Answers as Correct # 1
Users Marked my Answers as Wrong # 0
Questions / { irfan ullah khan }
Questions Answers Category Views Company eMail

why wire sizes are 3/29 or 7/29 and why not wire sizes are 2/29 or 6/29?

OGDCL,

Electrical Engineering 4651

why generation voltages are 6.6kv or 11kv and why not some one give that stander that generation voltages are 5kv or 12kv?

AES,

1 Electrical Engineering 3222



Answers / { irfan ullah khan }

Question { Delta Roto Tech, 3773 }

what is the need of reactor in between the transmission line?..like powergrid like that..


Answer

to limit short ckt current, for that we use reactors
formula:
Ish=v/xL

Is This Answer Correct ?    0 Yes 0 No

Question { HZL, 5308 }

11KV electrical line going through the forest in cloudy night ,how can we find the direction of line.


Answer

with the help of position of cross aram..

Is This Answer Correct ?    1 Yes 0 No


Question { Meralco, 3343 }

Can a 150 kva 3 phase,440v/230v delta-wye connection stepdown transformer can be used in reverse as a step up tranformer ?


Answer

firstly the size of power tr are 25kva, 50kva,100kva.200kva not 150 kva yes we can use it..

Is This Answer Correct ?    0 Yes 0 No

Question { 2454 }

Isolation transformer primary to sec turns ratio?


Answer

1=1

Is This Answer Correct ?    0 Yes 0 No