22P142OUT.xls

INPUT_DATA

Please change only the data written in BLUE color

Name of SubstationContract No.ProtectionRelay FunctionTypeSerial No.Rated VoltageRated transformerLowside VoltagePercentage of Phase Current SetPercentage of Ground Current SetCT Ratio Primary

Secondary

SLG Fault Current at 115 KVPhase Operating Time

Ground Operating Time

Instanteneous Settings ( for Ground Fault)

Instanteneous Time

SET I>> = 1 * MAX FAULT 22KV

SET IE>> = 1 * MAX FAULT 22KV

22kV 3 PHASE FAULT = 6685.02 AINST. FAULT SETTING = 6690 A22kV SLG FAULT = 1880.87 AINST. FAULT SETTING = 6690 A

tI>> = 0.05

SLG Fault Current at 115 KV

Instanteneous Time

3f Fault Current at 115 KV

Instanteneous Settings ( for 3f Overcurrent)

3f Fault Current at 115 KV

INPUT_DATA

115kV 3 PHASE FAULT = 34944.4 A

INST. FAULT SETTING = 6690 A

115kV SLG FAULT = 9831.8 A


tI>> = 0.6

Relay Function

Type

Percentage of Overloading

Relay Operating Time

Rate Current

Time Delay

U< 3 sec

U<< 1.5 sec

U> 2 sec

U>> 1 sec

Formula

ST 0.05 0.04

SI 0.14 0.02

IN 9.4 0.7

VI 13.5 1

EI 80 2

LT 120 1

2

4

K IF

I> 0.14 11.142

Ie> 13.5 3.135

INPUT_DATA

ROT CHANA

PEA - TSD.6.1.P-3.7/2550

22 kV OUTGOING FEEDER50 / 51 & 50/51G 50BF set I<AREVA P142

primary

115 kV 115000 V

50 MVA22 kV

100 %30 %

600 A 600

1 A34,944.40 A 6685.02 A9,831.80 A 1880.87 A

0.2 Second

0.15 Second xIn

34,944.40 6685.01565217391 11.14

9831.8 1880.86608695652 3.13

0.05 Second

1

1

For LV coordinate

34,944.40 A9,831.80 A

0.6 Second

INPUT_DATA

For HV coordinate

50 / 62BF

MICOM P127

10 %

0.3 Sec

3,156.00

Short Time Inverse

Standard Inverse

Inverse

Very Inverse

Extremely Inverse

Long Time Inverse

IS α

1 0.02

0.30 1.00

INPUT_DATA

secondary115 V 66.4

pri sec ratio300 1 300600 1 600

Through fault to high sideThrough fault to high side

Through fault to Low side

3.13 1878

INPUT_DATA

SUBSTATION : ROT CHANA CONTRACT NO. :

PROTECTION : 22 kV OUTGOING FEEDER

RELAY Fn. : 50 / 51 & 50/51G TYPE :

CALCULATED BY : DATE :

APPROVED BY : DATE :

REMARKS :

Maximum CT Ratio = 600.00

Rated Current = 600.00

Select CT RATIO = 600

For Phase Fault SettingsMinimum Pick up current at 100% of Full Load Current of Transformer

= 600.00

= 1.000

= 1.000

Relay setting value I> = 1.000

= 6,685.02

= 11.142

= 11.142

= 11.142

Select Standard Inverse Curve (SI)

= 11.142

Time , T = 0.14 * ( TMS ) / [ ((IF / Is)^0.02)-1]

= 2.8343 * (TMS)

Required Operating Time = 0.2

TMS = 0.071

Choose TMS I> Setting = 0.075

Ins. Setting I>> = 11.15

Ins. Setting Time = 0.05

Actual Operating Time I> = 0.213

For Ground Fault SettingsMinimum Pick up current at 30% of Full Load Current of Transformer

= 180.000

= 0.300

= 0.300

Relay setting value Ie> = 0.300

Maximum SLG Fault current = 1,880.87

= 3.135

= 3.14

= 10.45

Select Very Inverse Curve (VI)

= 10.45

Time , T = 13.5 * ( TMS ) / [ ((IF / Is)^1)-1]

= 280.9528 * (TMS)

Required Operating Time = 0.15

TMS = 0.051

Choose TMS I> Setting = 0.050

Maximum 3 f Fault current

IF / Is

IF / Is

Ins. Setting Ie>> = 11.15

Ins. Setting Time = 0.05

Actual Operating Time Ie> = 0.146

PEA - TSD.6.1.P-3.7/2550

AREVA P142

A

/ 1 A

A Primary

A Secondary

A (SEE ANNEX)

A Secondary

0.14 * ( TMS ) / [ ((IF / Is)^0.02)-1]

Second

(~ 100% Max. Fault)

Second

Second

A Primary

A Secondary

A (SEE ANNEX)

A Secondary

13.5 * ( TMS ) / [ ((IF / Is)^1)-1]

Second

IN

IN

IN

Is

IN

IN

IN

Is

(~ 110% Max. Fault)

Second

Second



RELAY Fn. : 50BF set I< TYPE :

CALCULATED BY : DATE :

APPROVED BY : DATE :

REMARKS :

Capacity of Transformer line = (50 MVA / SQ.RT.3 * 22 kV )

= 1312.16

Rated Current = 1312.16

Select CT RATIO = 600

For Breaker Failure SettingsPick up under current at 10% of CT Rating

= 60.00

= 0.100

= 0.100

Relay setting value I< = 0.100

= 6,685.02

= 11.142

Breaker Failure I< < 11.142

Breaker Failure is operated at Phase Fault

Maximum SLG Fault current = 1,880.87

= 3.135

Breaker Failure I< < 3.135

Breaker Failure is operated at Earth Fault

Time of BF Tbf = 300

Maximum 3 f Fault current

PEA - TSD.6.1.P-3.7/2550

AREVA P142

(50 MVA / SQ.RT.3 * 22 kV )

A

/ 1 A

A Primary

A Secondary

A (SEE ANNEX)

A Secondary

A Secondary

A (SEE ANNEX)

A Secondary

A Secondary

ms

IN

IN



RELAY FUNCTION : 50 / 51 & 50/51G TYPE :

SETTING FOR AREVA : P142 RELAY

Setting

SYSTEM DATA Language English Sys Fn Lonks 0

Description MiCOM P142Plant Reference MiCOMFrequency 50 Hz

CB CONTROL CB Control by Opto+Local

Close Pulse Time 500 ms Trip Pulse Time 500 ms Man Close Delay 10 s

CB Healthy Time 5 s Reset Lockout by CB Close Man Close RstDly 5 s CB Status Input None

DATE AND TIME Battery Alarm Disabled,Enabled

CONFIGURATION Setting Group Select via Menu Active Settings Group 1 Setting Group 1 Enabled Setting Group 2 Disabled

Setting Group 3 Disabled Setting Group 4 Disabled System Confic Invisible Overcurrent Enabled Neg Sequence O/C Disabled Broken Conductor Disabled Earth Fault 1 Enabled Earth Fault 2 Disabled SEF/REF Prot'n Disabled Residual O/V NVD Disabled Thermal Overload Disabled Neg Sequence O/V Disabled Cold Load Pickup Disabled Selective Logic Disabled Admit Protection Disabled Volt Protection Disabled Freq Protection Disabled df/dt Protection Disabled CB Fail Enabled Supervision Enabled Fault Locator Enabled System Checks Disabled Auto-Reclose Enabled

Input Labels Visible Output Labels Visible CT & VT Ratios Visible Recorder Control Invisible Disturb Recorder Invisible Measure 't Setup Invisible

Comms Settings Visible Commission Tests Visible

Setting Values Secondary Control Inputs Visible Ctrl I/P Config Visible LCD Contrast 11

CT AND VT RATIOS Main VT Primary 115 kV Main VT Sec'y 115 V Phase CT Primary 115 kV Phase CT Sec'y 115 V SEF CT Primary 1800 A SEF CT Secondary 1 A

CB MONITOR SETUP Broken I^ 2 I^ Maintenance Alarm Disabled I^ Maintenance - A I^ Lockout Alarm Disabled I^ Lockout - A No. CB Ops Maint Alarm Disabled No. CB Ops Maint - A No. CB Ops Lock Alarm Disabled No. CB Ops Lock - A CB Time Maint Alarm Disabled CB Time Maint - ms CB Time Lockout Alarm Disabled CB Time Lockout - ms Fault Freq Lock Alarm Disabled Fault Freq Count - Fault Freq Time 3600 s Reset Lockout By CB Close Man Close RstDly 5 s

OPTO CONFIG Global Nominal V 110/125V Opto Filter Cntl 0000 0001 Characteristic Standard 60%-80%

Group1 Overcurrent I>1 Function IEC S Inverse I>1 Directional Non-Directional km I>1 Current Set 1 I>1 TMS 0.075 I>1 DT Adder 0.0 I>1 tRESET 0 I>2 Function DT I>2 Direction Non-Directional I>2 Current 11.15 I>2 Time Delay 0.05 s I>2 tRESET 0.00 s

I>3 Status Disable I>4 Status Disable I> Blocking 00000000 I> Char Angle 0.00 Deg VCO Status Disable

Group1 Earth Fault 1 : In1>1 Function IEC V Inverse In1>1 Direction Non-Directional In1>1 Current 0.3 A In1>1 TMS 0.051 In1>1 DT Adder 0.00 s In1>1 tRESET 0.00 s In1>2 Function DT In1>2 Direction Non-Directional In1>2 Current 11.15 In1>2 Time Delay 0.05 s In1>2 tRESET 0.00 s In1>3 Status Disable In1>4 Status Disable In1> Blocking 000000 In1> Char Angle 0.00 Deg In1> Pol Zero Sequence In1> Vnpol Set 20.00 V

Group1 CB Fail & I< : CB Fail 1 Status Enable CB Fail 1 Timer 300.0 ms CB Fail 2 Status Disable Volt Prot Reset CB Open & I< Ext Prot Reset CB Open & I< I< Current Set 100 mA In< Current Set 100 mA ISEF< Current 20 mA Remove I> start Disable s Remove IN> start Disable

Group 1 Supervision VTS Status DT VTS Reset Mode Auto VTS Time Delay 2.000 s VTS I> Inhibit 0.00 A VTS I2> Inhibit 0.00 ms CTS Status Disable

GROUP 1 Fault Locator Line Length 0.000 mi Line Impedance 0.00 Ohm Line Angle 0.00 Deg KZN Residual 0.000 KZN Res Angle 0.00 Deg

GROUP 1 AUTO RECLOSE AR Mode Select Command Mode Number of Shots 2 Sequence Co-ord 0 Dead Time 1 500 ms

Dead Time 2 15 s Dead Time 3 10s Dead Time 4 10s CB Healthy Time 5 s Start Dead t On Protection Reset tReclaim Extend On Operate tReclaim Time 1 60 s tReclaim Time 2 0 s tReclaim Time 3 0 s tReclaim Time 4 0 s AR Inhibit Time 20 ms AR Lockout No Block EFF Maint Lock No Block AR Deselected No Block Manual Close No Block Trip 1 Main No Block Trip 2 Main Block Inst Prot Trip 3 Main Block Inst Prot Trip 4 Main Block Inst Prot Trip 5 Main Block Inst Prot Man Close on Flt Lockout Trip AR Inactive No Lockout Reset Lockout by User Interface AR on Man Close Inhibited Sys Check Time 0 s AR Skip Shot 1 Disable I>1 AR Initiate Main AR IN>1 AR Initiate Main AR Ext Prot No Action Line/Dead Ccts Disable No System Checks Enable SysChk on Shoy 1 Enable

GROUP 1 Input Labels Opto Input 1 Input L1 Opto Input 2 Input L2 Opto Input 3 Input L3 Opto Input 4 Input L4 Opto Input 5 Input L5 Opto Input 6 Input L6 Opto Input 7 Input L7 Opto Input 8 Input L8

GROUP 1 Output Labels Relay 1 Output R1 Relay 2 Output R2 Relay 3 Output R3 Relay 4 Output R4 Relay 5 Output R5 Relay 6 Output R6 Relay 7 Output R7 Relay 8 Output R8 Relay 9 Output R9 Relay 10 Output R10 Relay 11 Output R11

AREVA P142

Setting Range

Min Max Step

English, Franais0=Trip LED, 1=Reset

MiCOM P142

50Hz 60Hz 10Hz

Disabled,Local,RemoteLocal+RemoteOpto,Opto+Local,Opto+Remote

Opto+Rem+Local100 ms 10 s 10 ms100 ms 5 s 10 ms100 ms 600 s 10 ms100 ms 999 s 10 ms

User Interface, CB Close100 ms 999 s 10 ms

None,52A,52B,Bolt 52A AND 52B

Select via Menu,Select via OptoGroup 1-4

Disabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledInvisible,VisibleDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,EnabledDisabled,Enabled

Invisible,VisibleInvisible,VisibleInvisible,VisibleInvisible,VisibleInvisible,VisibleInvisible,VisibleInvisible,VisibleInvisible,Visible

Primary,SecondaryInvisible,VisibleInvisible,Visible

0 31 1

0.04s 100s 0.01sNo or Yes or Dir

0.5 In 40 In 0.01 InDMT or IDMT or RI

0s 150s 0.01sNo or Yes or Dir

1 2 0.1Alarm Enabled, Alarm Disabled

1A 25kA 1AAlarm Enabled, Alarm Disabled

1A 25kA 1AAlarm Enabled, Alarm Disabled

1 10000 1Alarm Enabled, Alarm Disabled

1 10000 1Alarm Enabled, Alarm Disabled

5 ms 500 ms 1 msAlarm Enabled, Alarm Disabled

5 ms 500 ms 1 msAlarm Enabled, Alarm Disabled

0 9999 10 s 9999 s 1 s

CB Close ,User interface10 ms 600 s 10 ms

30/34V,48/54V,110/125V,220/250V,CustumInput L1-L8

Standard 60%-80%,50%-70%

IEC S,V,E Inverse, UK LT Inverse, UK RectifierNon-Directional, Directional Fwd,Rev

0.08 4 0.010.025 A 1.2 A 0.025 A

0s 100 s 10 ms0 s 100 s 10 ms

Disable,IEC S,V,E Inverse,UK LT Inverse,UK RectifierNon-Directional, Directional Fwd,Rev

80 mA 4 A 10 mA0 s 200 s 0.01 s0 s 100 s 11 ms

Disable,EnableDisable,Enable

VTS Blocks I>1-4, AR Blocks I>3-4(-95) 95 1 Deg

Disable,I>1,I>2,Bolt I>1& I>2

IEC S,V,E Inverse, UK LT Inverse, UK RectifierNon-Directional, Directional Fwd,Rev

80 mA 4 A 10 mA0.025 1.2 0.005

0 s 100 s 10 ms0 s 100 s 11 ms

Disable,IEC S,V,E Inverse,UK LT Inverse,UK RectifierNon-Directional, Directional Fwd,Rev

80 mA 4 A 10 mA0 s 200 s 0.01 s0 s 100 s 11 ms

Disable,EnableDisable,Enable

VTS Blocks I>1-4, AR Blocks I>3-4(-95) 95 1 Deg

Zero Sequence, Neg Sequence2 V 320 V 2 V

Disable,Enable0 s 10 s 10 ms

Disabled,EnabledI<Only,CB Open & I<,Prot Reset & I<I<Only,CB Open & I<,Prot Reset & I<

0.02 A 3.2 A 0.01 A0.02 A 3.2 A 0.01 A1 mA 800 mA 500 uA

Disabled,EnabledDisabled,Enabled

Blocking,IndicationManual,Auto

1 s 10 s 0.1 s80 mA 32 A 0.01 A50 mA 500 mA 10 mA

Disable,Enable

0.005 mi 621 mi 0.005mi0.4 Ohm 1000 Ohm 0.04 Ohm

20 85 1 Deg0 7 0.01

(-90) 90 1 Deg

1 4 1Disable,Enable

10 ms 300 s 10 ms

10 ms 300 s 10 ms10 ms 300 s 10 ms10 ms 300 s 10 ms10 ms 9999 s 10 ms

Protection Reset, CB tripOn Prot Start,No Operate

1 s 600s 10 ms1 s 600s 10 ms1 s 600s 10 ms1 s 600s 10 ms

10 ms 600 s 10 msNo Block,Block Inst ProtNo Block,Block Inst ProtNo Block,Block Inst ProtNo Block,Block Inst ProtNo Block,Block Inst ProtNo Block,Block Inst ProtNo Block,Block Inst ProtNo Block,Block Inst ProtNo Block,Block Inst Prot

No Lockout, LockoutNo Lockout, Lockout

User Interface, Select NonautoEnable, Inhibited

10 ms 9999 s 10 msDisable,Enable

No Action, Initiate Main ARNo Action, Initiate Main ARNo Action, Initiate Main AR

Disable,EnableDisable,EnableDisable,Enable

GRAPH_DATA

t = 0.14 x (TMS)/((IF/IS)^0.02-1)

t t

PH O/C E/F O/C

through phase o/c

side A

969.13636 185.4

993.18182 190

1045.4545 200

1202.2727 230

1463.6364 280

1829.5455 350

2090.9091 400

2352.2727 450

2613.6364 500

2927.2727 560

3293.1818 630 10.7551

3345.4545 640 8.1294

3397.7273 650 6.5537

3408.1818 652 6.3113

IF

GRAPH_DATA

3434.3182 657 5.7796

3460.4545 662 5.3336

3512.7273 672 4.6273

3565 682 4.0931

3685.2273 705 3.2502

3690.4545 706 3.2218

3695.6818 707 3.1940

3747.9545 717 2.9418

3800.2273 727 2.7292

3852.5 737 2.5475

3904.7727 747 2.3905

3957.0455 757 2.2535

4009.3182 767 2.1327

4061.5909 777 2.0256

4113.8636 787 1.9299

4166.1364 797 1.8438

4218.4091 807 1.7660

4270.6818 817 1.6954

4322.9545 827 1.6309

4375.2273 837 1.5718

GRAPH_DATA

4427.5 847 1.5175

4479.7727 857 1.4674

4532.0455 867 1.4210

4584.3182 877 1.3779

4636.5909 887 1.3378

4688.8636 897 1.3003

4741.1364 907 1.2653

4793.4091 917 1.2324

4845.6818 927 1.2016

4897.9545 937 1.1725

4950.2273 947 1.1451

5002.5 957 1.1193

5054.7727 967 1.0948

5107.0455 977 1.0716

5159.3182 987 1.0495

5211.5909 997 1.0286

5263.8636 1007 1.0087

5316.1364 1017 0.9897

5368.4091 1027 0.9716

5420.6818 1037 0.9543

GRAPH_DATA

5472.9545 1047 0.9377

5525.2273 1057 0.9219

5577.5 1067 0.9067

5629.7727 1077 0.8922

5682.0455 1087 0.8782

5734.3182 1097 0.8648

5786.5909 1107 0.8519

5838.8636 1117 0.8395

5891.1364 1127 0.8276

6006.1364 1149 0.8028

6121.1364 1171 0.7799

6236.1364 1193 0.7586

6351.1364 1215 0.7388

6466.1364 1237 0.7204

6581.1364 1259 0.7031

6696.1364 1281 0.6869

6811.1364 1303 0.6718

6926.1364 1325 0.6574

7041.1364 1347 0.6439

7156.1364 1369 0.6312

GRAPH_DATA

7271.1364 1391 0.6191

7386.1364 1413 0.6077

7501.1364 1435 0.5968

7616.1364 1457 0.5865

7731.1364 1479 0.5767

7846.1364 1501 0.5673

7961.1364 1523 0.5584

8076.1364 1545 0.5498

8191.1364 1567 0.5416

8306.1364 1589 0.5338

8421.1364 1611 0.5263

8536.1364 1633 0.5191

8651.1364 1655 0.5122

8766.1364 1677 0.5056

8881.1364 1699 0.4992

8996.1364 1721 0.4930

9111.1364 1743 0.4871

9226.1364 1765 0.4813

9341.1364 1787 0.4758

9456.1364 1809 0.4705

GRAPH_DATA

9571.1364 1831 0.4653

9686.1364 1853 0.4603

9801.1364 1875 0.4555

9916.1364 1897 0.4509

10031.136 1919 0.4463

10146.136 1941 0.4419

10261.136 1963 0.4377

10376.136 1985 0.4336

10491.136 2007 0.4296

10606.136 2029 0.4257

10721.136 2051 0.4219

10836.136 2073 0.4182

10951.136 2095 0.4146

11066.136 2117 0.4112

11181.136 2139 0.4078

11296.136 2161 0.4045

11411.136 2183 0.4013

11526.136 2205 0.3981

11641.136 2227 0.3951

11756.136 2249 0.3921

GRAPH_DATA

11871.136 2271 0.3892

11986.136 2293 0.3864

12101.136 2315 0.3836

12216.136 2337 0.3809

12331.136 2359 0.3782

12446.136 2381 0.3757

12561.136 2403 0.3731

12676.136 2425 0.3707

13460.227 2575 0.3552

14244.318 2725 0.3417

15028.409 2875 0.3298

15812.5 3025 0.3193

16596.591 3175 0.3099

17380.682 3325 0.3014

18164.773 3475 0.2937

18948.864 3625 0.2867

19732.955 3775 0.2802

20517.045 3925 0.2743

21301.136 4075 0.2688

22085.227 4225 0.2638

GRAPH_DATA

22869.318 4375 0.2590

23653.409 4525 0.2546

24437.5 4675 0.2505

25221.591 4825 0.2466

26005.682 4975 0.2430

26789.773 5125 0.2395

27573.864 5275 0.2363

28357.955 5425 0.2332

29142.045 5575 0.2303

29926.136 5725 0.2275

30710.227 5875 0.2249

31494.318 6025 0.2224

32278.409 6175 0.2200

33062.5 6325 0.2177

33846.591 6475 0.2155

34630.682 6625 0.2134

34970.455 6690 0.0500

35754.545 6840 0.0500

36538.636 6990 0.0500

37322.727 7140 0.0500

GRAPH_DATA

38106.818 7290 0.0500

40720.455 7790 0.0500

43334.091 8290 0.0500

45947.727 8790 0.0500

48561.364 9290 0.0500

51175 9790 0.0500

53788.636 10290 0.0500

56402.273 10790 0.0500

61629.545 11790 0.0500

66856.818 12790 0.0500

72084.091 13790 0.0500

77311.364 14790 0.0500

82538.636 15790 0.0500

87765.909 16790 0.0500

92993.182 17790 0.0500

98220.455 18790 0.0500

103447.73 19790 0.0500

108675 20790 0.0500

113902.27 21790 0.0500

119129.55 22790 0.0500

GRAPH_DATA

124356.82 23790 0.0500

129584.09 24790 0.0500

134811.36 25790 0.0500

140038.64 26790 0.0500

145265.91 27790 0.0500

150493.18 28790 0.0500

155720.45 29790 0.0500

156818.18 30000 0.0500

GRAPH_DATA

22.5000

12.1500

6.0750

2.4300

1.2150

0.7147

0.5523

0.4500

0.3797

0.3197

0.2700

0.2641

0.2585

0.2574

GROUND o/c (13.5*(TMS)/((IF/IS)1-1)

GRAPH_DATA

0.2547

0.2521

0.2470

0.2420

0.2314

0.2310

0.2306

0.2263

0.2221

0.2181

0.2143

0.2106

0.2070

0.2035

0.2002

0.1969

0.1938

0.1907

0.1878

0.1849

GRAPH_DATA

0.1822

0.1795

0.1769

0.1743

0.1719

0.1695

0.1671

0.1649

0.1627

0.1605

0.1584

0.1564

0.1544

0.1524

0.1506

0.1487

0.1469

0.1452

0.1434

0.1418

GRAPH_DATA

0.1401

0.1385

0.1370

0.1355

0.1340

0.1325

0.1311

0.1297

0.1283

0.1254

0.1226

0.1199

0.1174

0.1149

0.1126

0.1104

0.1082

0.1061

0.1041

0.1022

GRAPH_DATA

0.1003

0.0985

0.0968

0.0951

0.0935

0.0920

0.0905

0.0890

0.0876

0.0862

0.0849

0.0836

0.0824

0.0812

0.0800

0.0788

0.0777

0.0767

0.0756

0.0746

GRAPH_DATA

0.0736

0.0726

0.0717

0.0708

0.0699

0.0690

0.0681

0.0673

0.0665

0.0657

0.0649

0.0642

0.0634

0.0627

0.0620

0.0613

0.0607

0.0600

0.0594

0.0587

GRAPH_DATA

0.0581

0.0575

0.0569

0.0563

0.0558

0.0552

0.0547

0.0541

0.0507

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

GRAPH_DATA

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

GRAPH_DATA

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

0.0500

10 100 1000 10000 1000000.01

0.10

1.00

10.00

100.00

TIME COORDINATION OF OVERCURRENT PROTECTION ( 22kV SIDE )

FAULT CURRENT(A)

OP

ER

AT

ING

TIM

E (

S)



3 PHASE FAULT

- - - - SLG FAULT

22kV SLG FAULT = 1880.87 A


100 1000 10000 1000000.01

0.10

1.00

10.00

100.00TIME COORDINATION OF OVERCURRENT PROTECTION

( 115kV HIGH SIDE )TRANSFER TO 22kV

FAULT CURRENT THROUGH 22kV SIDE(A)

OP

ER

AT

ING

TIM

E (

S)

115kV HIGH SIDE O/C PHASE



3 PHASE FAULT

- - - - - SLG FAULT

22P142OUT.xls

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Transcript of 22P142OUT.xls