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What is the calculating formula for HT and LT amps in a
transformer.
- 22 Answers
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Answer / lokesh ranjith
P=root3 v i cospie
I = P/root 3 . v. cos pi
| Is This Answer Correct ? | 169 Yes | 35 No |
Answer / rajesh tewari
CURRENT IN LT SIDE
=KVA *1000/1.732*LT VOLTAGE*COSQ
CURRENT IN HT SIDE
= KVA *1000/1.732*HT VOLTAGE*COSQ
| Is This Answer Correct ? | 176 Yes | 54 No |
Answer / baskaran.r
the rating KVA=Root 3*Vl*Il Apply primary and secondary
voltages to get the max. current
| Is This Answer Correct ? | 93 Yes | 15 No |
Answer / s.l.bhatt
If the current of one side either primary or secondary is
known than the current of other side will be in same
proportion as the volotage ratio of primary and secondary
side.
For example -for a 1000 KVA 11kv/0.4 kv transformer if there
is 1 amp. current in HT side than current in LT side will be
1x11x1000/400 i.e almost 26 amps.
| Is This Answer Correct ? | 55 Yes | 20 No |
Answer / thyagarajan
FOR EXP....
in 50mva trx mean
P= ROOT3 *V*I*COS
50*1000*1000=1.732*110*1000*I
I= 262.4 IN PRIMARY SIDE
50*1000*1000=1.732*33*1000*I
I= 874.8 AMPS IN SEC SIDE
| Is This Answer Correct ? | 57 Yes | 25 No |
Answer / raju kumar singh
Let suppose u have taken 1500 kva transformer of 11kv to 415 v u wanna be the current calculation for the both HT side and LT side. But u also think that u have connect load of the transformer 1000 kw. In this case both HT & LT SIDE power drawn is same. But this is three phase so we take formula
P equal to SQ ROOT 3 *V* I COS phai
Remember cos phai is necessary becuse of we know KVA :::: KW/ COS phai
U have connect 1000kw and its drawn full lo
ad then it wil be calculate in HT SIDE
1000*1000:::1.732*11000*0.8* I(u take power factor as0.8)
I::::65.6A
WHILE calculating in LT SIDE IT wil be
1000*1000::: 1.732*440*0.8* I
I:::1739.05A
because power drawn HT & LT SIDE depend on load connected to the transformer
| Is This Answer Correct ? | 32 Yes | 9 No |
Answer / balasubramanian
amps in LT side I=P/root 3 * v* cos pie
amps in HT side I=P/root 3 * v* cos pie
| Is This Answer Correct ? | 37 Yes | 19 No |
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