Answer / tharan

power frequency incresing voltage r step up.. power frequency
decreasing voltage r step down..

Answer / omwikha

Voltage=4.44fN(phi). Where f= frequency
Thus increasing frequency automatically will increase the voltage and vice versa.

how rated the neutral voltage of transformer and reactor, e.g. 400/220, 200MVA transformer have neutral voltage of 33kv. and reactor voltage 145kv. how this rating decided?

1 Answers   MEIL,

---

Why? We r used 50sq. mm. And above size cable in 3.5 core and below size are used in 4core

2 Answers  

---

why Current is lead 90 degree and voltage is lag 90 degree in a capacitor.? why Current is lag 90 degree and voltage is lead 90 degree in an inductor.?

0 Answers  

---

roles of owslaw explain?

3 Answers   BSNL,

---

what is the difference between 3 phase 3wire &3phase 4 wire meter?what is the advantage of 3p3w over 3p4w?

1 Answers   L&T, MahaDiscom,

---

What is difference between YNyn0 and YNyn ??

0 Answers  

---

plz explain TSM and PSM.with example suppose ct ratio is 4000/5 and tsm is .15 and plug is at 3.75 if fault current is 8000A.so how i find relay oprating time.

2 Answers   College School Exams Tests, ME,

---

what is the current density of copper & alluminium.

0 Answers  

---

my first school?

1 Answers  

---

How one can check the faulty capacitor, diode when connected in the circuit ? and when you can not take them out ?

4 Answers  

---

I had applied for JE in PSEB, Can you pls send me the Question bank for related to my field

0 Answers  

---

why the current is denoted by the letter 'i'

1 Answers  

---