what is the purpose of neutral grounding resistor (NER) and
why?
Answers were Sorted based on User's Feedback
Answer / elizabeth
Neutral Earthing Resistors (NERs) – sometimes called Neutral Grounding Resistors – are employed in medium-voltage AC distribution networks to limit the current that would flow through the neutral point of a transformer or generator in the event of an earth fault. NERs limit fault currents to a value that does not cause any further damage to switchgear, generators or transformers beyond what has already been caused by the fault itself.
Is This Answer Correct ? | 45 Yes | 2 No |
Answer / maqbool
THE purpose of neutral grounding resistor is to limit the
fault current of the system since ground fault current
takes earth as return path
Is This Answer Correct ? | 45 Yes | 3 No |
Answer / sajid hussain
Sir I want to install the uat neutral grounding resistor. Where it will connect from and to?. And tell me it's function. Thanks
Is This Answer Correct ? | 0 Yes | 1 No |
Answer / getdaya@yahoo.com
the fault current in power system depend upon the impedence
value of the system,for neutral grounding which provides
high reactance tot the ps ,and low resistance to the ps,
Is This Answer Correct ? | 2 Yes | 6 No |
Answer / minal
NGR means Neutral grounding resistor. This is connected to
neutral wire to ground the extra leekage current.
Since in UT,UAT & ST star connection is used, that means
there are 4 wires (R,Y,B & N).Thus neutral is grounded with
a resistor.
Is This Answer Correct ? | 7 Yes | 15 No |
Answer / ramesh
Neutral grounding resistor generally used in star connected
load in order to reduce the over voltages due to either
switching phenomena or lightning phenomena.
Neutral grounding reactor is another component used for the
same purpose.
Is This Answer Correct ? | 7 Yes | 18 No |
Answer / subhani
any short circuits occur in stator or rotor then that short
circuit current will limitig and any erath fault occur in
rotor or stator then thats current will also limited value
by depending on resisance value
Is This Answer Correct ? | 1 Yes | 16 No |
How to Calculate the Fault Level of Electrical Installation
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