what is the significance of KV & MVA rating of the
transformer and how they are related.
Answers were Sorted based on User's Feedback
Answer / subra
In power transmission operating voltage are in K V
ie Kilo Volt
The transformers Capacity is in MVA ie Mega Volt Ampere
In power Distribution Network operating Voltage in KV kilo Volt
The transformer Capacity in KVA
Power in 3h = Root3 VxI ---VA
root 3VxI Cosphi----Watts
watts X 1000 =KW VA x 1000 = KVA
Watts x 1000000 = MW KVA X 1000 = MVA
Is This Answer Correct ? | 93 Yes | 16 No |
Answer / subra
In the trasformer KV means kilovolt KV is operating voltage
ie 11Kv ,33kv,132kv,230kv,440kv this may be stepup or step
down.But MVA means capacity of the transformer mega volt
ampere.
Is This Answer Correct ? | 59 Yes | 22 No |
significance of voltage n power,KV*I*1.732=MVA
Is This Answer Correct ? | 26 Yes | 20 No |
Answer / sagar singh
The ratings of a transformer is in MVA because due to the
losses i.e. core and iron losses.
Is This Answer Correct ? | 31 Yes | 29 No |
Answer / eduardo
kV means kilo Volts, and is 1000 V. So 10kV means 10 000V.
This is the operating voltage. You must have another voltage
in the transformer. One is for the primary, and the other
for the secondary.
MVA means Mega Volt Ampere and is the power of the transformer.
1 MVA = 1 000 000 VA.
For example. If you have a transformer 10kV/400V and with 1
MVA, this means that at full charge is able to delivery in
the secodanry 1 000 000 VA / 400 V = 2 500 A.
He must be connect at a power line 10 kV and will delivery
400 V (till the load of the seconary reach 2 500A, after
that the value of the tension in the secondary begins to
drop, but this is another story).
In the primary the current will be 1 000 000 VA / 10 000 V =
100 A (at full charge).
Is This Answer Correct ? | 25 Yes | 24 No |
Answer / deepu
Simply kv is used for
distribution and mva
for transmission
purpose
Is This Answer Correct ? | 14 Yes | 31 No |
Answer / c.mahadevan
respected sir,
iam C.Mahadevan electrical engineer,in this
question i have to answer for the transformer mainly MVA
using for High voltage transmission purpose and reduces to
the losses(conductor loss,transmission cost).
KV means it is step down purpose and distribution lines.
Is This Answer Correct ? | 10 Yes | 50 No |
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