Answer / gourav jaswal

kw is actual power.
kva is apprent power.
The main diffrence b/w these two is power factor,
kw = kva * p.f
Normaly p.f cant be calculated before in any AC system, so
that it measured in kva.
Same as in case of t/f its also have rating in kva (not in kw)

Answer / vinod

KW is the actual converted power from the used electrical
power.
KVA is the apparant power ie. the product of voltage and
current.in the presence of power factor the KVA value limit
the use of power equipments. for low pf the machine will be
over loaded for rated out put KW.

Answer / vinoth

simple when a motor having some ratings ex: 7.5 kw motor
used the same power from the incomer.the volt,current rating
not changed. but transformer having kva rating because the
volt range constant and the current range is default so
thats only we use kva rating in tr and kw in motors.

Which power will flow first if we switch on a motor? Active or Reactive? How?

5 Answers   NPTC,

---

flurescent bulb rating is to 230v,50HZ.now flurescent connected 230v,25HZ.whether nreduced frequency will affect the glowing properties of flurescent.

6 Answers  

---

Is there any standard guidelines/Criteria to design NGR/NGT.?

0 Answers  

---

Is it benefitial to supply 210v ac to lighting fixtures instead of 240v ac?

2 Answers  

---

What is the Powar consumption of fan low speed to full speed? is it same ?

3 Answers  

---

In the market there is availability of MCCB & ACB (800A), So, Where i can use MCCB & ACB for the same Rating?

1 Answers  

---

If a three phased motor or not working phased change on poles so how to find which one red yallow & blue

1 Answers  

---

What is the Relation b/w star delta starter , DOL starter and two speed starter. if we want to rotate a 20 kw fan in 2 speeds which type of two speed starter we have 2 use?

1 Answers   ABB,

---

what is the maximum rating(KVA) of transformer can be used in distribution side..(11KV/440v) and why??

1 Answers   Jindal,

---

how many wires need to be bring to the motor if its star delta starter

5 Answers  

---

what is bausbar?

4 Answers   Essar,

---

What is the make of breakers, transformers, generators? What are their capacities and ratings?

4 Answers   Bharat Bijlee, GHPPL, Tata Motors,

---