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how we can calculate the transformer size.

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how we can calculate the transformer size...

it depends on the load.

 Is This Answer Correct ? 144 Yes 13 No

how we can calculate the transformer size...

Transformer size is depends upon the load.
For example

Take one building having load of 630KW
Now we can calculate the t/f size of the building

KW=KVA*P.f
630=KVA * 0.8
KVA = 630/0.8
KVA = 787.5 KVA

So the Transformer size is 800KVA

 Is This Answer Correct ? 130 Yes 21 No

how we can calculate the transformer size...

actually at the time of transformer rating decided the
following factor to be consider
2.Power fACTOR
3.fUTURE eXPANSION

KW=KVA*P.f
630=KVA * 0.8
KVA = 630/0.8
KVA = 787.5 KVA

So the Transformer size is 800KVA

THIS CALCULATION IS EXACTLY CORRECT

BUT FOR FUTURE EXPANTION WE CONSIDER 30 % MARGINE FOR THAT

 Is This Answer Correct ? 80 Yes 13 No

how we can calculate the transformer size...

The transformer sizing depends on (i) Continuous load +
(ii) Intermittant Load + (iii) 30% spare capacity.

With this you will get the required KVA size of the
transformer. Apart from this the consideration shall be
also on the type of load that the transformer shall feed.
In case of motor consideration shall be given to the
loading during starting of the biggesr motor along with hoe
many motors to be started at any one time.

 Is This Answer Correct ? 13 Yes 0 No

how we can calculate the transformer size...

it depends upon flux density & kva rating

 Is This Answer Correct ? 48 Yes 36 No

how we can calculate the transformer size...

Check the following
1.) Max connected load
2.) Type of load
3.) impedence drop as per IS
4.) Drop for cable used
6.) transformer efficency
8.) provision for future expansion

 Is This Answer Correct ? 6 Yes 4 No

how we can calculate the transformer size...

Check the following
1.) Max connected load
2.) Max demand
4.) transformer efficency
6.) provision for future expansion
Example
Total Connected Load in kW 870.00
Total Maximum Demand in kW (80% of CL) 696.00
Total kVA @ 0.8 PF 870.00
Total kVA @ 0.9 Load Factor 783.00
Transformer Capacity Chosen 2000

 Is This Answer Correct ? 14 Yes 13 No

how we can calculate the transformer size...

Answer / kamlesh rudra

Requierd ment Of Load.

 Is This Answer Correct ? 1 Yes 0 No

how we can calculate the transformer size...

Answer / satya mahesh

load factor(LF) and utilization factor(UF) will play a
major role in transformer selection.
Maximum demand in a month-1582 Amps
Average load which will be the average of running loads
came in a month-1173 Amps
=1173/1582
=0.74
UF=No.of hours running Equip/total hours in a month
=(30*20)/(30*24)
=600/720
=0.83
Transformer size= Connected load X LF X UF
=4810 X 0.74 X 0.83
=2954 Amps
for 2954 Amps 2500 KVA(3484 Amps) transformer was suitable
in continution to the future loads also.

 Is This Answer Correct ? 2 Yes 1 No

how we can calculate the transformer size...

Answer / pravin sathalpara

it is depend upon the load beacause trasformer equistion
is
kva=VICOS
SO,OUR VOLTAGE AND CURRENT(LOAD) IS DECIDE FIRST

 Is This Answer Correct ? 0 Yes 0 No

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