Interested to Buy Any Domain ? << Click Here >> for more details...
what is neutral grounding? why is it required? what is
neutral grounding resistor and how is its value calculated??
- 11 Answers
- 65279 Views
- NTPC, ONGC, I also Faced
- E-Mail Answers
Answer Posted / mahmud
Impedance earthing - The purpose of this method is to limit
the current for greater safety.
There are 3 type-
1.Earthing through reactance.
2.Earthing through ARC - Suppression coil.
3.Earthing through resistor.
These parameters are needed to specify the earthing
resistor:
U : Rated voltage line to line voltage or system voltage
(kV)
If : Rated fault current (A)
T s : Rated time (Sec) - Duration of the fault
Resistance value :
R=U/(I.Sqare root3)
| Is This Answer Correct ? | 42 Yes | 14 No |
Post New Answer View All Answers
is there any device that works properly accept relay, it may be fuse but if i want fuse of 33kv 300 amp it is avaliable, pls give me details
what is the circutor?why we use it ?
To prove the capacity of a 10MVA transforemr with 6.5% impedance by a short circuit test how much power is needed to inject an impedance voltage if we have to arrive for its rated current?
WHAT IS THE TOTAL POWER GENERATION IN CHHATTISGARH?
Tell me about ur past electrical maintanence job
please tell me how a surge protector work on a DC 48Volt.? please describe briefly.
When we giving the 3 phase supply to ups system how to coming netural?
When calculating the speed of a rotor required for a particular frequency of synchronous generator we use the equation 60f/p Is this p is the number of pole pairs of rotor & do we consider the number of pole pairs in the stator is 1?
54 Comments Alok and Bhanu play the following min-max game. Given the expression N = 38 + X*(Y – Z) where X, Y and Z are variables representing single digits (0 to 9), Alok would like to maximize N while Bhanu would like to minimize it. Towards this end, Alok chooses a single digit number and Bhanu substitutes this for a variable of her choice (X, Y or Z). Alok then chooses the next value and Bhanu, the variable to substitute the value. Finally Alok proposes the value for the remaining variable. Assuming both play to their optimal strategies, the value of N at the end of the game would be?
why incomer bay is required before transformer bay if there are more than 1 nos. of transformer bay.
what is deffrence between squirral cage and wound rotor in IM?
How to detect voltage vector shifting in interconnection protection.
What is the abbreviation of NGT panel
what is differant beetween overload current and phase current?
WHY THE COLOR OF OUTDOOR TRANSFORMER IS BLUE ONLY???
