If two generator running parallel, at that condition both ngr Taken in line or

If two generator running parallel, at that condition both ngr
Taken in line or taken any one ngr, but why any one or both
Ngr in line?
Ngr is use for which purpose?

Question Posted / sunil_k89

3 Answers
8276 Views
I also Faced
E-Mail Answers

Answers were Sorted based on User's Feedback

If two generator running parallel, at that condition both ngr Taken in line or taken any one ngr, b..

Answer / ahmed

It's purpose is to allow & limit fault current within range.
If the current is 0, then this could damage the insulation
due to increase of voltage in other phases &/or won't allow
fast detection of the fault. If the neutral ground is solid,
then faut current will be disastrous for the equipment which
dictate very expensive equipment set to withstand such
faults. So partially using NGR in your case allows a path
for fault current to pass & being detected

Is This Answer Correct ?

3 Yes

0 No

If two generator running parallel, at that condition both ngr Taken in line or taken any one ngr, b..

Answer / mustafa

NGR=NEUTRAL GROUNGING RESISTOR
NGR USED TO REDUCE EARTH FAULT CURRENT AND AVOID DAMAGE DUE
HIGH FAULT CURRENTS, REDUCE HORMONIC CURRENT

Is This Answer Correct ?

2 Yes

0 No

If two generator running parallel, at that condition both ngr Taken in line or taken any one ngr, b..

Answer / harkamal singh

NGR Neutral ground resistance

Ngr panel is use allow to minimum range of unbalance current of Electrical alternators and add extra resistance in series of neutral link.

Is This Answer Correct ?

0 Yes

0 No

Post New Answer

More Electrical Engineering Interview Questions

Explain why the Voltage drop will happen in 3 Phase line?

3 Answers

why field winding is placed on rotor winding not on stator winding in case of synchronous machine?

13 Answers HAL, TATA,

DEAR SIR/MADAM,CLEARLY EXPLAIN ABOUT CRAWLING AND COGGING EFFECTS IN INDUCTION MOTOR.

0 Answers Greenko Group,

How do we measure earth fault current in Generator Transformer(20/420kv),Station Transformer(20/11 kv) and Unit Transformers(20/11kv) for our plant system, since these don't have any Neutral earth Fault relay connected to their Neutral Earth? But for Unit Service transformers(11/.433 Kv) we have an Earth Fault Relay connected to its neutral earth.Why is such so?

1 Answers NTPC,

when we design electrical schemes of 11/.415kv distribution..wen and were should we show the relays??what is the function of it?for example..we place EFR Relay CT between transformer neutral link and transformer earth.Like this what are the other type of relays we should use?why?where?Explain please..Thank you

0 Answers ETA,

why middle phase should used for earth fault and other phases used for over current in overcurrent and earth fault relay?

7 Answers ABB, ONGC,

(1)Electrical power is generated in KV, power consunmed is in MW and the transformers used are in KVA. How is KVA converted to MW as power being consumed by the consumers? (2)What is vector group of a transformer?

1 Answers

what is effect of leading power facter on the system and billing

0 Answers TATA,

How is the AVR working?

1 Answers

why Ac current is alternating in nature?(or)why alternating current changes its direction?

3 Answers APGenco,

If more than rated DC voltage appears across trip coil of the breaker, what will happen? e.g. in 110V DC circuit system, if voltage across battery terminal showing 121 V

0 Answers

what is the minimum recommended leakage current of an earthed cable connected to the body or skid of an alternator

0 Answers

For more Electrical Engineering Interview Questions Click Here