Answer / amit pandey

it is the ratio of actual quantity to base quantity.

Answer / xxx

per unit impedance of a transformer is the fraction of the
voltage applied when the current is equal to the rated
current when the terminals are shorted.For example, if a
transformer has 0.05 pu impedance (on percentage terms, you
say that transformer impedance is 5%), full rated current
will flow in the primary and secondary if you apply 5% of
the rated voltage to the primary after short circuiting the
secondary terminals.In other words, if full voltage is
applied to the primary of the transformer and the secondary
terminals are shorted, the current will be 1/(p.u
impedance) p.u. ie; in the above example of the transformer
with 5% impedance, the current will be 20 p.u. (ie; 20
times the rated current).
This definition can be extended to other electrical
appliances also.

Answer / jignesh

10 db

what is meant by LCR meter? where its useful ?

0 Answers  

---

diff b/w elcb and rccb

0 Answers  

---

What is the percentage loss for aluminium wire for HT line more than 11KVa

0 Answers  

---

What is the need for checking knee point voltage for CT's?

1 Answers  

---

How to take vector group test of a transformer? Suppose we dont know the vector group of transformer, how to check its vector group through test? I have 3 transformer DYn11 & DYno& Ynd11, how to confirm its vector group?

1 Answers  

---

How can we check ELCB trip current sensitivity How can we check earth resistance value

2 Answers  

---

State kirchoff current law?

0 Answers  

---

What is electrical diversity factor in electrical installations?

0 Answers  

---

what is voltage gradient?

8 Answers   Bhel,

---

sir, plz tell me how much kvar capacitor required for 1000 amp or 500 Kw load ? what is the formula ?

14 Answers   CSPL,

---

How to dimensioning SDCCH, LAPD and CS7 signaling on GSM?

1 Answers  

---

what is meant by power and distribution transformer ?

0 Answers   CG,

---