DOCUMENT : FAULT LEVEL CALCULATIONKAPIL JANI

CABLE :A B C D E F G

LENGTH (MTR) 10 200 100 100 100 100 100SIZE 150 300 400 400 300 300 300VOLTAGE 11000 415 11000 11000 415 415 415NO. OF CABLES 2 1 2 1 2 2 2RESISTANCE ( Ohms/km ) 0.206 0.1 0.0778 0.0778 0.1 0.1 0.1REACTANCE ( Ohms/km ) 0.0956 0.086 0.085 0.085 0.086 0.086 0.086ACTUAL IMPE.(OHM/KM) = 0.11 0.13 0.06 0.12 0.07 0.07 0.07Z(Ohm) = 0.001 0.026379 0.006 0.012 0.00659 0.007 0.007

0 0 0 0 0 0 0ANY OTHER IMPEDANCE

TRANSFORMER : KVA IMPEDANCERATING(KVA) 0 UP TO 630 4%IMPEDANCE 0 631-1250 5PRIMARY. VOL. (KV) 0 1251-3150 6.25SECO. VOL.(KV) 0 3151-6300 7.15Z(Ohm) = #DIV/0! 6301-12500 8.35

12501-25000 1025001-200000 12.5

SOURCE IMPEDANCE : VOLTAGE LEVEL FAULT LEVELFAULT LEVEL (MVA) 350 0.415 KV 35 MVAVOLTAGE 11 3.3 KV 150 MVACURRENT 18.37 11 KV 350 MVASOURCE IMPE. = 0.3457 Ohm 22 KV 750 MVASOURCE IMPE. = 0.0000 Ohm 33 KV 1000 MVA

66 KV 1600 MVA132 KV 10000 MVA

ANSWER :TOTAL IMPEDANCE= #DIV/0! Ohm

FAULT CURRENT = #DIV/0! kA

FAULT LEVEL = #DIV/0! MVA

SHORT CIRCUIT CAPACITY AND CABLE REACTANCE FOR XLPE/AYFY (HT & LT)2.5 4 6 10 16

HT REACTANCE 0 0 0 0 0LT REACTANCE 0 0 0 0 0.10RESISTANCE ( Ohms/km ) 0.00 0.00 0.00 0.00 0.00

25 35 50 70 95 120 150 185 240 3000.13 0.12 0.12 0.11 0.10 0.10 0.10 0.09 0.09 0.090.10 0.10 0.09 0.09 0.09 0.09 0.09 0.09 0.09 0.091.20 0.87 0.64 0.44 0.32 0.25 0.21 0.16 0.13 0.10

4000.090.090.08

DOCUMENT : FAULT LEVEL CALCULATION

LINK 1 CABLE

LENGTH (MTR) 10SIZE 150VOLTAGE 11000NO. OF CABLES 2IMPEDANCE = 0.001135510458

LINK 2 TRANSFORMER

DOCUMENT : FAULT LEVEL CALCULATION

CABLE :A B C D E F

LENGTH (MTR) 10 350 0 0 0 0SIZE 150 185 400 70 300 300VOLTAGE 11000 415 476 476 415 415NO. OF CABLES 1 2 1 1 2 2RESISTANCE ( Ohms/km ) 0.206 0.164 0.0778 0.443 0.1 0.1REACTANCE ( Ohms/km ) 0.0956 0.087 0.086 0.09 0.086 0.086ACTUAL IMPE.(OHM/KM) = 0.23 0.09 0.12 0.45 0.07 0.07Z(Ohm) = 0.002 0.032 0.000 0.000 0.000 0.000

3.2324510514 0.00004624 0.000000 0.0000000 0.0000000 0.0000000ANY OTHER IMPEDANCE

TRANSFORMER : KVA IMPEDANCERATING(KVA) 1250 UP TO 630 4%IMPEDANCE 5.25 631-1250 5PRIMARY. VOL. (KV) 11 1251-3150 6.25SECO. VOL.(KV) 0.415 3151-6300 7.15Z(Ohm) = 0.0072 6301-12500 8.35

12501-25000 1025001-200000 12.5

SOURCE IMPEDANCE : VOLTAGE LEVEL FAULT LEVELFAULT LEVEL (MVA) 350 0.415 KV 35 MVAVOLTAGE 11 3.3 KV 150 MVACURRENT 18.37 11 KV 350 MVASOURCE IMPE. = 0.3457 Ohm 22 KV 750 MVASOURCE IMPE. = 0.0005 Ohm 33 KV 1000 MVA

66 KV 1600 MVA132 KV 10000 MVA

ANSWER :TOTAL IMPEDANCE= 3.2402 Ohm

FAULT CURRENT = 0.07 kA

FAULT LEVEL = 0.05 MVA AT WING DB

G SHORT CIRCUIT CAPACITY AND CABLE REACTANCE FOR XLPE/AYFY (HT & LT)0 2.5 4 6

300 HT REACTANCE 0 0 0415 LT REACTANCE 0 0 0

2 RESISTANCE ( Ohms/km ) 0.00 0.00 0.000.1

0.0860.07

0.0000.0000000

SHORT CIRCUIT CAPACITY AND CABLE REACTANCE FOR XLPE/AYFY (HT & LT)10 16 25 35 50 70 95 120 150

0 0 0.13 0.12 0.12 0.11 0.10 0.10 0.100 0.10 0.10 0.10 0.09 0.09 0.09 0.09 0.09

0.00 0.00 1.20 0.87 0.64 0.44 0.32 0.25 0.21

185 240 300 4000.09 0.09 0.09 0.090.09 0.09 0.09 0.090.16 0.13 0.10 0.08

DOCUMENT : FAULT LEVEL CALCULATIONH.T. CABLE L.T. CABLE

CABLE :A B C D E F

LENGTH (MTR) 10 300 0 0 0 0SIZE 185 16 150 150 300 300VOLTAGE 11000 415 11000 11000 476 476NO. OF CABLES 1 1 1 1 2 2RESISTANCE ( Ohms/km ) 0.164 0 0.206 0.206 0.1 0.1REACTANCE ( Ohms/km ) 0.0928 0.097 0.0956 0.0956 0.086 0.086ACTUAL IMPE.(OHM/KM) = 0.19 0.0970 0.23 0.23 0.07 0.07Z(Ohm) = 0.002 0.029100 0.000 0.000 0.00000 0.000

2.682088E-06 0.0291 0 0 0 0ANY OTHER IMPEDANCE

TRANSFORMER : KVA IMPEDANCERATING(KVA) 1250 UP TO 630 4%IMPEDANCE 5 631-1250 5PRIMARY. VOL. (KV) 11 1251-3150 6.25SECO. VOL.(KV) 0.415 3151-6300 7.15Z(Ohm) = 0.0069 6301-12500 8.35

12501-25000 1025001-200000 12.5

SOURCE IMPEDANCE : VOLTAGE LEVEL FAULT LEVELFAULT LEVEL (MVA) 350 0.415 KV 35 MVAVOLTAGE(kV) 11 3.3 KV 150 MVACURRENT (KA) 18.37 11 KV 350 MVASOURCE IMPE. = 0.3457 Ohm 22 KV 750 MVASOURCE IMPE. = 0.0005 Ohm 33 KV 1000 MVA

66 KV 1600 MVA132 KV 10000 MVA

ANSWER :TOTAL IMPEDANCE= 0.0365 Ohm

FAULT CURRENT = 6.57 Ka AT 415 VOLTS

FAULT LEVEL = 4.72 MVA AT WING DB

G SHORT CIRCUIT CAPACITY AND CABLE REACTANCE FOR XLPE/AYFY (HT & LT)0 2.5 4 6 10

300 HT REACTANCE 0 0 0 0476 LT REACTANCE 0 0 0 0

2 RESISTANCE ( Ohms/km ) 0.00 0.00 0.00 0.000.1

0.0860.07

0.0000

SHORT CIRCUIT CAPACITY AND CABLE REACTANCE FOR XLPE/AYFY (HT & LT)16 25 35 50 70 95 120 150 185 240

0 0.13 0.12 0.12 0.11 0.10 0.10 0.10 0.09 0.090.10 0.10 0.10 0.09 0.09 0.09 0.09 0.09 0.09 0.090.00 1.20 0.87 0.64 0.44 0.32 0.25 0.21 0.16 0.13

300 4000.09 0.090.09 0.090.10 0.08