Answer / raghavendran

NGr can be calculated by dividing the system voltage by the
allowable let through current from the resister to earrth.
say the system voltage is 600 volts and the allowable let
through current is 25A then the NGR value could be 600/25 =
24ohms.

What difference between ref protection and differential protection ?

0 Answers   EPC, INEL Power System Engineers,

---

difference between diode and scr?

2 Answers  

---

i have applied for the post of RRB section engineering chennai board please send me previou papers and solved answer. my mail id jagarapusrinivas@gmail.com

0 Answers   RRB,

---

what are the components of a start and stop motor control?

2 Answers  

---

What is the formula to find out the kvar required to improve the powerfactor from .85 to .99 at 1500kw, 415v.

4 Answers   Trident,

---

---

what's the difference between 'shaft power demand' and 'BHP' , when we consider electrical load list.

0 Answers   HEC,

---

I have 480V Single phase and I am trying to figure how big of a transformer (KVA's) and Primary breaker size I need to provide 200 Amps at 240V for a building.

1 Answers   Wipro,

---

how to calculate earth resistat in earthpit with earth testing kit?

2 Answers  

---

hi Is there any possibilities to find out the rotation of a shaft or something else by using electromagnectic waves or by IR rays.If s then can v change the dir., of rotation of the same by remotely?& how? plz dn't any1 say "NO r CAN'T"

0 Answers  

---

what is the suitable voltage of transmission line to transmit 10000w power through 250 km. (a)11kv (b)33kv (c)66kv (d)132kv ]and please tell me whats the logic behind it

7 Answers   ONGC,

---

What is rated value? is it phase values or line values?

1 Answers  

---

why there is no current in the rotor body althrough the flux linking with it also get changes. why current only flows in windinds not in rotor

1 Answers   Vedanta,

---