Answer / murali290

For any device the rating is given based on the losses occur
in it (loss is nothing but heat).In transformer 2 types of
losses occur 1.core losses: which depends on V &
2.cu losses: which depends on I only
but no losses depends on p.f.
therefore trasformer rating proportional to VI or VA
for large transformers the rating in kilo or mega ,hence
KVA or MVA

Answer / m.anand

copper loss and iron loss depends only on current and
voltage there is no phase angle involved in between voltage
and current.so powerfactor is not factor affecting
transformer rating ...
hence transformer ratings are in KVA

Answer / jd

Since we don't know the type of load that the transformer would be bearing in future. thus the manufacturer specifies its rating in KVA or MVA

Answer / gopalakrishna

transformer ratting are always in KVA or MVA why because
transformer iron losses are depen upon current, and copper
losses are depending upon voltage hence the rattings of the
trans former rattings are in 'kva'

transformer is connected with 50hz and 60hz at same rating which will give more output on same rating

2 Answers   Palace Consultant,

---

how can calculate resistance box for 15 kw, 6 pole, RV-230, RA-42 motor

0 Answers  

---

any calculation method for decide cable size for current?

1 Answers  

---

if i am in front of transmission line how to know that current direction without any equipment

0 Answers  

---

What is the use of Surge Capacitor in LAVT?

1 Answers   Snipe Engineers,

---

why a tester wont shock while testing the power in house

0 Answers   Tessolve,

---

Does increase or decrease of reactive load affects the Voltage.

5 Answers   Nalco,

---

DGs fuel and lube oil filters are not equal to one another.Why it is so.For example one MTU enginee fuel filter is one and lube oil filter-02nos other DGs are more.Please explain

1 Answers  

---

i have three phase 25kva transformer but there is two phase line how can i connect to the two phase line?

2 Answers  

---

what is earth resistance? how to measured? and give values at power station and mcc area?

0 Answers   Essar,

---

please send me RRB electrical engineer previous year questions for Sr. Section Engineer

0 Answers  

---

where reactive power is used

0 Answers  

---