Answer / jignesh kadia

tr mer is a static device.it's transfer the power without
change in frequency.tr are not need to connect load so p.f
are not important in this case..
where in motor or gen the some load are connected. it's
depend upon the p.f..
so kw= kva * p.f
the losses:-
core loss:-hysterisis loss= bf, eddy current loss= b^2*f^2
iron loss:- i^2r
so core loss depends directly to supply voltage or iron loss
depends upon current..so tr rating in kva..

how do we calculate of transformer in va?what is calculation?

2 Answers  

---

What is the polarization index value ? (Pi value)and simple definition of polarization index ?

0 Answers  

---

Explain role of Buckolz Relay in Transformer ?

7 Answers  

---

why we use circuit breakers for switching instead of normal switching device?

0 Answers  

---

In generation,transmission and distribution voltage frequency is either 50HZ or 60 HZ;why are only these frequencies?

2 Answers  

---

234 MVA Generator 3 phase Short circuit current Values required? Gen set Rating-234 MVA, Gen Voltage-18kv, PF;0.8, Xdv:23.5 %, Transformer Rating-18/380KV, 680MVA,Yndd1 two winding, Step up TR, ZT:35.50 %,X/R 4.33 Gen CB Position, CB open ,Disconnected open, Generator Running Voltage 18 Kv, Bi mistakes generator side earth switch Closed during that time short circuit current level in 3 Phase required, and how to test on site 234MVA Generator Short circuit current,

0 Answers   Jubail O&M,

---

What will happen if i replace a inductive proximity switch with photo sensor in a machine?

0 Answers   Hitachi,

---

why energy storing capacity of magnetic field is much higher than electric field ?

1 Answers  

---

what are types of encoder

0 Answers  

---

What are the functions of temperature scanner in power transformer?

0 Answers   HCL,

---

why overcurrent fault occurs in power system.

1 Answers  

---

How to implement 6 output with 3 input NAND gate?

1 Answers  

---