NGR? What is NGR?

Question Posted / guest

14 Answers
42851 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

NGR? What is NGR?..

Answer / jim sreedharan

NGR is neutral ground resistance. 5-10 % of full load
current passes through NGRcduring system ombalance.
Restricted earth fault current passes through NGR till
automatic protection takes place. NGR absorbs the earth
pressure and protects the transformer windngs.

God Bless

Is This Answer Correct ?

0 Yes

1 No

NGR? What is NGR?..

Answer / karthi

GM, I have query that how the current flow comes from leakage fault point to NGR pit? For example my motor is located far away from transformer location and the cable got exposed and severe ground fault happens thus the huge current flows in it. In that case how NGR protects the system? Also I read that NGR allows one fault and the second instance only will trip and protect the circuit, I cant get that how it is.

Can some one clarify me, Thanks

@ Karthi

Is This Answer Correct ?

0 Yes

1 No

NGR? What is NGR?..

Answer / md79

Mr. Venkatesh A.

I have a 347V, 5A continuous NGR.

How can I determine how many ohms of resistor should be
used?

Thank you

Is This Answer Correct ?

0 Yes

2 No

NGR? What is NGR?..

Answer / mahesh.s

NGR is Neutral Ground Resistance,This value is below one
Ohm better value

Is This Answer Correct ?

2 Yes

22 No

Post New Answer

More Electrical Engineering Interview Questions

HARMONICS ARE ALWAYS IN INTEGER LIKE 2ND OR 3RD HARMONICS,NOT IN FRACTION LIKE 0.5 HARMONICS.....????????

2 Answers

role of europe union in UK safety legistlation (electrical safety)

0 Answers

what s the differenc between electrical &electronis , how to define them

9 Answers

what are the precuation should be taken ahen installing power transformer,circuit breaker,current & potential transformer

0 Answers Siemens,

If a 1.5V,3W torch light bulb is connected in series with a 15HP/11.19KW,230V single phase motor and the combination is connected against a 230V supply and switched on than what will happen keeping all other parameters as it should be A)the bulb will glow normally B)the bulb will not glow C)the bulb will glow with extra brightness D)the bulb will burn out and if a fuse is connected to the above circuit will something happen to the fuse and what about the single phase motor will it be affected? Please explain with derivation

4 Answers

During Millivolt drop test current leads are applied in the extreme ends and voltage leads are given just before the current leads.. what will be the difference if voltage leads are given in the extreme ends? and why?

1 Answers

what is the advantages of having in-built acvvvf (without seperate inverter in the control panel)in the drive system of elevators?

0 Answers

What will happen if the oil level in the buchholz realy of a transformer gets down?

3 Answers

why to use 50hz only in tansmisson and as well as in distribution why not60hz?

2 Answers

what is meant by frequency ?

10 Answers TCS,

How many turns are there in primary winding? (In Transformer)

0 Answers Philips,

In HVDC LINE RECTIFIER CONTROL ON CONSTANT CURRENT AND INVERTER CONTROL CONSTANT EXITATION ANGLE CONTROL BUT HOW INVERTER CONTROL CONSTANT CURRENT?