Answer / subhendu

1.eliminate 3rd harmonics
2.eliminate voltage unbalanced partially.
3.used in 1 phase distribution system

Answer / marsad

In a transmission system star connected transformers are preferred than delta connection.. .
Usually the star point is earthed and connected a neutral current transformer in series with the neutral point and ground.. and works as a 3 phase 3 Wire system..
Whenever an internal fault occurs an unbalaced current Flows through the neutral point and then through NCT if the neutral current above a limiting value a relay connected from NCT (called restricted earth fault relay) will actuate.. Which will trip the transformer and protects it.. This can only be done in star connected transformers..

Answer / engr ali azaz

its used for simly grounding

Answer / gravityguru

it provides a point to create potential difference...
between R-N, Y-N. B-N phases....this is in case of 3phase 4
wire system................
hence we can connect balanced or unbalanced load to different
phases

Why NGR is provided in sub station?

4 Answers   MMS,

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May I know how much values to be set for earth fault, over current and short circuit values at 11kv side? I have 11kv van 1250amps rating. Present it's taking load 80amps?

0 Answers  

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why transformer are not used in D.C SUPPLY

5 Answers  

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Why we use Y-Y connection in power transformer (8-10 MVA, 132 kV to 11 KV)and D-y in distribution transformer (2 MVA, 11 KV to 440 Volts)?

4 Answers  

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how to calculate the current carrying capacity of a 25 & 16 kva distribution transformer.

2 Answers  

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I am getting diesel genset 62 kv for my house In addition there are 6 meters of 11kv for the house Lift also being installed for house plot sise 200sq yds total 4 + 2 foloors I want to know how much earthing required how deep it should be

2 Answers  

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what is 11kv cable

1 Answers   bscpl,

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Relation between magnetic field strenght and magnetic induction is a) Voltage b) current c) Speed d) tarque

1 Answers   Ecil,

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what is units of resistance

3 Answers  

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How much DC or AC Current that a Human Body withstand for Electrical Shocks?

4 Answers   Suzlon,

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what is the principal of ceiling fan and how it will rotates? what is the magnetic momentum produces inside the fan?

1 Answers  

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why rating of transformer is in kva instead of kw?

3 Answers  

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