Answer / pradyumna171

Power given to the transformer is Apparent power (K)
it is the supply power of the power house and the power
given by the transformer to the Load is the true power or
Active power which is actual used by the load and rest is
the reactive power i.e. square of apparent power including
iron loss & copper loss in KVA = square of true power in KW
+ square of reactive power in KVAR. A sound transformer
efficiency is 98% (input power- Iron loss (k) & copper loss
= output power).
For full resistive load (at unity pf ) a 100 KVA
transformer gives 100 KW (approx.) true power, and for
inductive power at .8 pf the same will able to give 80 KW
(approx.) true power, but the types of load (its pf) is not
know before which to be connected across the transformer,
this is only why the transformers are rated in KVA and it
is meaningless to discuss about the iron loss and copper
loss because the Inventor and UPS are also rated in
KVA.

In other hand or in simply we can
say due to unknowing power factor the transformer,
generator etc are rated in KVA. In heavy size transformer
copper loss is more and it vary with load and Climate i.e.
transformer oil condition but it is not main reason for
rating the transformer in KVA.


Pradyumna Chandra Panda
Berhampur Mob 9861357949

Answer / mpackiyada321

Kilo volt ampir

How Can I calculate for the photometrics requirements for a street lighting? Data given are: 45 units of 6 meter light pole with 150 watts metal halide lamp, 220 volts and installed in a promenade area.

0 Answers  

---

In view of Electrical Engg. What is the use of SCR(Silicon control rectifier)

2 Answers  

---

magnetic circuit consume energy

3 Answers  

---

what is power factor

4 Answers  

---

What is relation between transmission lines & Communication lines ?

0 Answers   NTPC,

---

A 4-Pole D.C. Generator has a speed of 1500r.p.m. Then what will be the frequency of D.C. Generator ?

9 Answers   IBM,

---

How we can calculate the consumption in kwh of motor on basis of kw @100% load, @50% load & @ no load.

0 Answers   Grasim,

---

What are the ratings of VCB, MCB, MCCB, SF6, ACB, and OCB?

0 Answers  

---

How can I known multiplying factor .without multiplying table

0 Answers   Student,

---

different between circuit breaker & switchgear & relays

6 Answers   EFS,

---

What is precision of a measurement?

0 Answers  

---

how the reverse power relay acts..

2 Answers  

---