how to calculate of which rating transformer should be selected? take any exam

how to calculate of which rating transformer should be
selected? take any example

Question Posted / ajit singh

2 Answers
6418 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

how to calculate of which rating transformer should be selected? take any example..

Answer / yogesh

Calculate the system connected load.(CL)

Rating of Transformer = (CL*U.F.*M.F.)/(Tran.Effi.*p.f.)

Then consider the loading factor as 80%

as U.F. -Utilisation fsctor & M.F.- Maintenance factor

Is This Answer Correct ?

2 Yes

0 No

how to calculate of which rating transformer should be selected? take any example..

Answer / virendra joshi

usually transformer rating is based on power to be drawn by
the transformer. however few factor is also play a part
like LF, DF...

For Ex say total Connected load is 820 KW
Maximum Demand would be MD= Total connected Load x L.F (0.8)
xD.F (0.7) = 820 x 0.8 x 0.7 = 459 KW

now considering the load at 0.8 leg PF the kva rating of
the transformer is

KVA required = 459 / 0.8 = 574 Kva say .......600 KVA

Is This Answer Correct ?

2 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

use of choke in APFC panels

2 Answers Kemrock,

Why Transformer Neutral having one earth pit ( more earth electrode resistance) whereas body have many earth pit ( less earth electrode resistance)?

0 Answers OPS,

why auto transformer connected in star?

1 Answers

Our transformer capacity is 500kva & voltage ratio is 11kv/433v step down tf.Now i need to know if my input voltage is 10500v and what would be the secondary side voltage i.e output voltage ?

3 Answers Helma,

How many VSC based HVDC are there in India and the world

0 Answers

what is current actully?significance of current...not rate of change of flow.....

3 Answers

what is relay what is protection & contact multiplying relays where it is used function in brief

0 Answers

what are the advantages by using IGBT in VSC HVDC than thyristor in conventional HVDC

1 Answers Bhel, Eskom,

Rated moter voltage and frequency is 380volt 60 hz but moter is running at 380votac 50hz is this harmful for moter winding

1 Answers Infosys,

If a HV Underground Cable (13.8KV) is layed in the ground below 1.5 Mtrs and any building construction is done on the Cable route. IS this allowable or Not? What should be the clearance. As per ISO construction on HV cable route is safe or Not? Why? Can any body suggest the site for my question?

1 Answers ZCL,

what are the advantages and disadvantages of oil filled cables over XLPE cables

3 Answers Areva, AUVA,

r we are using in gas turbine mark (5) frame (6) (made in india Bhel 1997) Ā

0 Answers

For more Electrical Engineering Interview Questions Click Here