Answer / 7anoter4

I think it is the active [real] part of the transformer short-
circuit impedance.
Let’s say uk% it is the short-circuit voltage-4-25% percent of
rated voltage supplied at primary terminals when secondary
terminal are short-circuited and the current will be the rated
current. Then the short-circuit impedance Zk=R+jX
=uk%/100*Vrated/sqrt(3)/Irated –for 3 phases transformer. If
we’ll know kxr= X/R [6-40 ] then X=Zk/sqrt(1+1/kxr^2)
and R=X/kxr.

What information we need to prepare relay coordination chart

0 Answers  

---

why 5kW motor becomes unbalance if its relay trip 1st time and its set value is 7.0 A

0 Answers  

---

What is battery Amphere-hour? How the battery back up time period is calculated?

2 Answers  

---

what will happen if i commission a transformer without connecting the neutral?

2 Answers   L&T, Sail,

---

what is the diffrence between R Y B phase and why it is called RYB

5 Answers  

---

---

How does an oscillator differ from an amplifier?

0 Answers  

---

The ratio of white balls and black balls is 1:2. If 9 gray balls is added it becomes 2:4:3. Then what is number of black balls ?

3 Answers   CTS,

---

What happens to voltage when current through the inductor is constant?

0 Answers  

---

what is diff. between earthing grid,earthing mess, earting grid?

0 Answers   Century Rayon, Emco, Tailor Solution,

---

How to calculate incomer of a capacitor bank/feeder from its KVAR, AND how to calculate the copper busbar for rated incomer,like for 400A we calculate the 40x10 of aluminum busbar.

1 Answers  

---

why phase always came one direction in 5pin socket(right hand or left hand) which direction and why..........?

4 Answers   Alstom, L&T,

---

in parallel operation of power transformer why the distance between power transformer and capacitor bank feeder is necessary to know

0 Answers  

---