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
- 65749 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
Readings of ER300P Trivector meter
wish of these transformer uses oil?
What is earth?
In which of the following case, the rotating magnetic field is reversed? A regenerative breaking B plugging C dynamic breaking D forward motoring
Explain what is use of lockout relay in ht voltage?
can anyone send me some sample question regarding power grid corp
Give the topology of current amplifier with current shunt feedback?
how much value of resistance should connect to 15 kw, 6 pole 3 phase slip ring induction motor having RV-240, RA-42.
Briefly define and explain the following different types of Pulse Amplitude Modulation (PAM) with some examples. i) 2-PAM ii) 4-PAM iii) 8-PAM iv) 16-PAM v) Quadrature Amplitude Modulation (QAM)
Where should the lighting arrestor be placed in distribution lines?
why wire sizes are 3/29 or 7/29 and why not wire sizes are 2/29 or 6/29?
how to handle 2500 kva transformar
What are all present producing cost of Per KWH of various Fuel?
What is order of the system?
what is the safty of poly phase tranformer?
