Answer / deepakindi1

same as u do in for any 3 phase circuits

ie KW=sqrt(3)*V*I*cos(@)

WKT cos(@)=KW/KVA

SO KW/cos(@)=KVA

KVA=sqrt(3)*V*I

I=KVA/sqrt(3)*V

FOR EXAMPLE CONSIDER 11KV/440V 100KVA TRANSFORMER
AT PRIMARY
I=100/sqrt(3)*11
I=100/(1.732*11)
I=5.24A

AT SECONDARY I=100/sqrt(3)*.44
I=100/(1.732*.44)
I=131.24A

Here iam a question with SYNCHRONIZATION PANNEL related issue, as i want to design a SYNC.pannel board iam giving the 2 nos of 1MVA Generators to sync pannel , then what wil be the out put of the sync pannel, whether it wil be one cable coems from the sync panel or two cables.. as iam using two transformers to meet my load demand, so pls clear me whether two cables comes from sync panel to connect to transformers or only one cable

3 Answers  

---

how much watts the computer will takes

2 Answers  

---

What are the different power system losses and how can it be eliminated?

0 Answers  

---

Is there any type of starter for DC motor other than two point,Three point and Four point starters?

0 Answers  

---

How to decide CT & PT ratings for a given transmission line carrying some rated voltage?

0 Answers  

---

fundamentals of transformers.

5 Answers   Adani,

---

Sir I hv to fix 20 ton ac how much electrical power need apply?

1 Answers   Sealand Restaurant,

---

What is diversity factor and how to calculate it

2 Answers   Al Faraa, Amul, Pentagon, Sobha Developers,

---

To prevent the mal operation of a differentially connected relay while energizing a transformer, the relay restraining coil is baised with (a)second harmonic current (b)fifth harmonic current (c)third harmonic current (d)seventh harmonic current

2 Answers  

---

When will you multiply and devide with derating factors to the actual value while sizing the cable?

0 Answers  

---

In Electrical 'Single Line Diagram' cable nomenclature shows "2 X 1C X 630sq.mm to be provided for one incomer. The question is how many cable to be proved for one Incomer.

0 Answers  

---

What will be happend if we not ground CT secondary?

3 Answers   Enercon, Engro, THDC,

---