Answer / pradyumna chandra panda

By help of power trangle pf= value of cos thita (cos fi)=
b/h=active power/apparent power. Active power (kw)is the
real or true power which the transformer give for a
aparticular load (useed power)and Apparent power(kva)is the
supply power for that particular load. That a 100 kva
transformer can supply/give 100 kw resistive load and
incase inductive circuit a 100 kva rtransformer give 80 kw
inductive loadat at.8 pf,and 75 kw inductive load at.75 pf
etc but the pf of the load is not known before that which
types load (resistive,inductive or capacitive)to be
connected across the suplly, this is only why the
transformers and Alternaters are rated in kva and it is
meaningless discuss about iron loss & copper loss because
the UPS and inventers are also rated in kva.

Answer / praphulla bansal

KVA is mentioned to take care of PF issues of the load. At the same time, rating of transformer is given a limiting PF. This means a 100 KVA transformer and limit of 0.8 PF will limit load to 80 KW irrespective of load PF as unity.

Answer / md. abdullah al mamun

I think Copper loss of a transformer is related to current
and core losses are related to voltage so that VA should be
the rating of a transformer. But in a large transformer it
is rated it KVA. Also KVA rating Indicate the Maximum
Current Rating of a transformer with a rated voltage.

better choice of area of interest to post in our resume?

2 Answers   Cognizant,

---

What are the reasons for the parallel operation of transformers?

1 Answers  

---

what is efficient load of transformer in percentage

4 Answers  

---

What happens instead of using 3 phase, if we give loop of single phase to all three phases ??

1 Answers  

---

tell me about vfd

8 Answers  

---

What is spill current in protection relays?

1 Answers  

---

If we connect a motor and generator together (I mean that the generator gives the motor electricity and the motor gives the generator movement) regardless the losses. Will the generator still generate and the motor still move?

1 Answers   Cap Gemini,

---

hi... Can anybody give me description of type-2 coordination, IP protection, NEMA standards ? Thanks..

2 Answers   KSEB,

---

What is the full form of PSD & CSD ?

6 Answers   NIFT, PNG Power, PSD,

---

how to electronic energy metter failed in electomagnectic fild passing in the metter and which thing to defect more on metter.

1 Answers  

---

2. The heaviest and lightest strings on a certain violin have linear densities of 3.0 and 0.29 g/m. What is the ratio of the diameter of the heaviest string to that of the lightest string, assuming that the strings are of the same material?

1 Answers  

---

what is negative,positive abd zero sequence current explain clearly

1 Answers   Jindal,

---