Answer Posted / ajay

The Main reason is something historical. In olden days when the electricity becomes popular, the people had a misconception that in the transmission line there would be a voltage loss of around 10%. So in order to get 100 at the load point they started sending 110 from supply side.
Nowadays that thought has changed and we are using 400 V instead of 440 V, or 230 V instead of 220 V.
Also alternators are now available with terminal voltages from 10.5 kV to 15.5 kV so generation in multiples of 11 does not arise. Now a days when, we have voltage correction systems, power factor improving capacitors, which can boost/correct voltage to desired level, we are using the exact voltages like 400KV in spite of 444KV

what is meant by k-rating in isolation transformer?what is k9, k14 stands for?

2785

---

why fractional pitch winding generally used in alternators?

2962

---

TCS IS IT COMPANY THEN WHY DO THEY NEED ELECTRICAL &ELECTRONICS ENGINEERS?

1948

---

hi frnz,can somebody give me any project work? i am a 2nd year student & interested in practical works...plz give me some projects

2003

---

What is formula calculation size cable wire ?

1959

---

volts=230 c=10mf a=??

2045

---

how to calculation increase power factor for single phase

2303

---

main difference between ac and dc?

1719

---

what is the relation between reactive power and power factor for the what is the limit of reactive power and power factor

2109

---

i want to know how to determine that a surge arrester work properly in 11kv system. and how to test a 12kv surge arrester

2170

---

What is the dc grounding system and what is diff between AC/DC grounding system?

2125

---

internally connection of photvoltic module

1934

---

What is relation between transmission lines & Communication lines ?

2202

---

Explain bypass capacitor?

1173

---

What is the formula to calculate the rating of power cable for three phase current.

2143

---