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Vector Gr

During Earth fault voltag

Earth ault current !ill e

".G.R. value in oh

Val

"GR are inserted

Vector Gr

During Earth fault voltag

Earth ault current !ill e

".G.R. value in oh

Val

"GR are inserted

ypical shunt calculations fro

Vector

Vector Gr

During Earth fault voltage

Earth ault current !ill e l

".G.R. value in o

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V

"GR are inserted

200 to 400 A rated Neutral Grounding Resistors are generally used in 6.9

During Earth fault voltage

Earth ault current !ill e l

"GR are inserted

http://cr4.globalspec.com

".G.R. value in

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i 4 47

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lue of ".G.R. is 1.& 0p3 ',., 2h.3 1, 4ec

2n 5igher voltage to restrict earth fault current

V to 34.5 kV systems (Se note elo!". #er$itungan NGR S

et!een "eutral # Earth = 8,.,$%& = 11.* KV   11.% !

iited to = * + 1,- $(%& + 8,.,) = 1.& 0p.   144.3 #mp  8&.& $hm

Value of ".G.R. is 8,, 0p3 6,., 2h.3 1, 4ec

2n 5igher voltage to restrict earth fault current

Re'.

thread/61442/Earthing-Resistor-Calculation

oh = V $ = (11.* + 1,-) $ 200 = */./ 2h

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2" 2R R0"427ER

  2R R0"42R7ER D.1BC,6C8,,B

  hed 2R !ith "eutral Grounded !ith Resistance.

forer neutral are as 9:

  istor)

= 6.6$%& = &.'1 KV

+ 6.6) = &/.&'0p.

' = './1 2h

  h fault current

isi 6.6 %V

isi &&.0 %V

isi 20 %V

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isi 20 %V

  11.% !

200 #mp (nput #mp ) 2&& #mp  %"." $hm