Interested to Buy Any Domain ? << Click Here >> for more details...
only some transformers and some generator requires NGR why?
- 1 Answers
- 4925 Views
- I also Faced
- E-Mail Answers
Answer Posted / pavan
NGR - Neutral Grounding Resistor is used to limit the fault
current of a sytem.
So generally a system with high line voltage of 3.3KV and
above normally comprises of high load equipment which
results in very high fault currents due to a Short-circuit
fault. Normally during a Earth fault the fault current
flowing through the earthed phase is to be carried by the
remaining phases which may be very much more than the
rating of the conductors. So we follow the Neutral
Grounding practice so that the fault current is carried by
the nuetral.
Now this current carried by the nuetral is to be limited
such that this high fault current does not damage the
grounded equipment so in the neutral we insert a resistance
which is the NGR.
So for any high voltage system to limit the fault current
NGRs are used. for the equipment working at lesser voltage
normally can withstand the short circuit currents for short
time.
| Is This Answer Correct ? | 10 Yes | 0 No |
Post New Answer View All Answers
Explain the working of any one cutting machine
Please elaborate th´evenin’s theorem?
Difference between ac parallel circuit and ac series circuit?
Why CBCT rating is 50/1A
. How to calculate the Short Circuit Impedance in Transformer? How to calculate the Short Circuit Impedance in Transformer?
any idea abt REVERSE METERING concept.........?
What are the different towers used in 132kv transmission line? what are the differences between the P,R,S towers used in 132KV and detailed explanation
what is meaning of sympathetic tripping with respect to relays and give the values for current carrying capacities for copper and aluminium cables from 16sq mm to 500sq mm
Why are cables rated for 40 KA for 0.25 Sec fault current rating?
What are the site acceptance tests for power cables, DG Sets, LT panels & 30kVA UPS ?
How would your past experience translate into success in this job?
with 3 phase board on a 63 amp rcd is it ok to have 6 electrical showers 2 on each phase and what problems could happen
working principle of AC Servo Motor with its construction
What do you mean by ratio correction factor of instrument transformer?
what is the meaning of 0.5ohm Resistance
