Answer / k

use IS 3043

earthing cond size in sq mm S = A * sqrt(t)/k

A = fault current in amps
k = factor given in IS

refer website : www.jptechnosoft.com

Hi all, please could anybody give me a suggestion about Electrical designs and calculations .. what text book should i follow as i am a trainee engineer and here work going not so favorable to me so please help me friends .. A small discription about my work which is going here is all about Electrical designs like cable sizing, lighting, lightning, Gensets sizing, motor sizing, transformer sizing, generator sizing, circuit breakers, PDB MCC PCC SLDB MLDB panels, Single line diagrams mainly, substation desings, cable routing and layouts, reactive power compensations, power factor improvement, voltage drop calculations, power generations, power transmission, power distributions all calculations i need .. please please if anybody experienced with this problem and got a solution then please help me .. just i need an apt text book for these all calculations and designs ..

0 Answers  

---

What is rotating transformer? Which machine is used specifically as rotating transformer?

3 Answers   TATA,

---

Our transformer capacity is 500kva & voltage ratio is 11kv/433v step down tf.Now i need to know if my input voltage is 10500v and what would be the secondary side voltage i.e output voltage ?

3 Answers   Helma,

---

fog produced due to?

2 Answers   MAHINDRA,

---

what is the switching substation

2 Answers  

---

which plant has high load factor

10 Answers   APTransco,

---

Transfer function is == ? a. Mathematical model b. System with no physical structure c. Can be calculated through differential equations

1 Answers   CCP,

---

what is the purpose of shading ring or shading coil in electrical equipments.

0 Answers   BARC,

---

importance of air gap in transformer

5 Answers  

---

An input device is interfaced with Intel 8085A microprocessor as memory mapped I/O.The address of the device is 2500H.In order to input data from the device to accumulator,the sequence of instruction will be

1 Answers   GATE,

---

resistivity of copper

1 Answers  

---

Why don't we provide SURGE ARRESTORS for Transformer feeders?

5 Answers  

---