Q-1 what are the structural and operational difference between a distrib

Q-1 what are the structural and operational difference between a distribution and a power transformer?
Q-2 what is skew in motors?
Q-3 draw equivalent circuit of transformer
Q-4 explain with phasors how pf is improved with loading in induction motors
Q-5 DIFFERENT METHODS OF CABLE LAYING(interviewer asked if i heard new chemical based earthing system next)
Q-6 pi model of medium length trans line
Q-7 v/f control?why
Q-8 vacuum circuit breaker operates in?

Question Posted / guest

1 Answers
5219 Views
Vijai Electricals, I also Faced
E-Mail Answers

Q-1 what are the structural and operational difference between a distribution and a power tr..

Answer / guest

1. pwer distri
operational near full load charachs near no load
structural mostly delta delta delta star(neutral grounded).

2 .skewing is done on rotor to prevent magnetic locking btween rotor and stator also done to reduce noise and harmonics

3 4 6 .can be found on net
5. trays,direct burial in ground,trenches etc(next question followed on why petrochems dont use direct burial in ground tech-ans chemicals eat away insulation)

7.v proportional 4.44 phi f n
v n f only variables rest constant
if change v alone to higher value,to maintain constant flux f changes to lower value so ratio v/f is changed n not alone v or f

8.10^-6 to 10^-8 torr used mostly inremote area due to practically low maintain and high reliable

last question was important
Q- whats salary expectation

Is This Answer Correct ?

12 Yes

1 No

Post New Answer

More Electrical Engineering Interview Questions

How delta connection in the primary of distribution transformer reduces harmonics?how delta connections reduces harmonics?Please answer me...Hope that question is correct.

0 Answers

How to calculate ht side cable of 630 kva oil cooled outdoor transformer?

1 Answers

why star point of motor shall not be grounded?

8 Answers

is it possible for different brand of H.V transformers to run or operate in parallel to each other? if so how much disturbance can this affact the H.V bus bar?

0 Answers Unitech,

Which element is highly conducting coppoer or gold?

3 Answers

if transformer winding burn on dc supply then why not alternator rotor winding please post answer on y.sakhare@rediffmail.com

4 Answers MahaGenco,

anti pumping relay function

3 Answers Hofincons,

If u take a kWh reading in 11 kV HT and 440 LV side at same time in yesterday today , then why LT consumed units 3-4℅ high as compared to HT units

1 Answers Brigade,

Transformer type...??

1 Answers

Frequency in the control system represents? Continuous system in time domain ? In frequency domain?

1 Answers CCP,

IF I USED VVVF DRIVE IN FAN APPLICATION MOTOR IN 6.6 KV ( 700 KW) MOTOR & DURING NORMAL RUN OPERATION TIME IF RPM SUDDENLY REDUCE IN MOTOR BY DRIVE(E. MOTOR RPM REDUCE SUDENLY 687 TO 550 RPM) WAHT WILL BE HAPPEND IN DRIVE

1 Answers

What is the difference b/w Earthing and Grounding?

4 Answers

For more Electrical Engineering Interview Questions Click Here