i Dmt Relay Curve

7/30/2019 i Dmt Relay Curve

1/64

Relay-1 Relay-2 Relay-3 Relay-4

Feeder Type :Protection Type :

System Voltage(KV) : 33 33 33 33

System Load(KVA) : 50000 50000 50000 50000

Relay Code :

Relay No :

CT.Pri (A) : 500 500 500 500

CT.Sec (A) : 5 5 5 5

Primary Fault Current (Amp) :

4500 4500 4500 4500Grading of Relay (Sec) : 0.3 0.3 0.3 0.3

System Current (Amp) : 875 875 875 875

Required Pick Up Setting of Relay: (

X In)1.75 1.75 1.75 1.75

Actual Pick Up Setting of Relay: ( X

In)1.75 1.75 1.75 1.75

Time Setting (TMS) Sec : 0.1 0.5 0.8 0.9

Curve Selection :Normal

Inverse (NI)

Normal

Inverse (NI)

Normal

Inverse (NI)

Normal

Inverse (NI)

CT Ratio (Amp) : 100 100 100 100

Relay Pick Up Current (Amp) : 8.75 8.75 8.75 8.75

PSM : 5.143 5.143 5.143 5.143

Relay OperatingTime (Sec) : 4.205 4.205 4.205 4.205

Actual Operating Time of Relay

(Sec) :0.420 2.102 3.364 3.784

Operating Time of Previous Up

steam Relay (Sec):0.720 2.402 3.664 4.084

Enter Data in White Background Cells

Jignesh.Parmar, www.electricalnotes.wordpress.com,[email protected]

IDMT Relay Setting Calculation
http://www.electricalnotes.wordpress.com/http://www.electricalnotes.wordpress.com/


2/64


3/64


4/64


5/64


6/64


7/64


8/64


9/64

Relay-5

33

50000

100

5

45000.3

875

8.75

1.75

0.1

Normal

Inverse (NI)

20

8.75

25.714

2.087

0.209

0.509

IDMT Relay Curve

0.000

0.200

0.400

0.600

0.800

1.000

1.200

1.400

1.600

1.800

0 2000 4000 6000 8000 10000 1

Relay

Pick

up(

Sec)

Primary Current (Amp)


10/64


11/64


12/64


13/64


14/64


15/64


16/64


17/64

2000

Relay-1

Relay-2

Relay-3

Relay-4

Relay-5


18/64


19/64


20/64


21/64


22/64


23/64


24/64


25/64


26/64


27/64


28/64


29/64


30/64


31/64


32/64


33/64

Normal Inverse (NI)

Very Inverse (VI)

Exteremely Inverse (EI)

Long Inverse


34/64


35/64


36/64


37/64


38/64


39/64


40/64


41/64

2

Relay-1 0.100 Relay-2 0.500

0.5 250 50 0.172 0.5 250 50 0.860 0.5

1 500 100 0.145 1 500 100 0.726 1

1.5 750 150 0.133 1.5 750 150 0.664 1.5

2.5 1250 250 0.120 2.5 1250 250 0.600 2.53 1500 300 0.116 3 1500 300 0.579 3

3.5 1750 350 0.113 3.5 1750 350 0.563 3.5

4 2000 400 0.110 4 2000 400 0.550 4

4.5 2250 450 0.108 4.5 2250 450 0.539 4.5

5.5 2750 550 0.104 5.5 2750 550 0.520 5.5

6 3000 600 0.103 6 3000 600 0.513 6

6.5 3250 650 0.101 6.5 3250 650 0.506 6.5

7 3500 700 0.100 7 3500 700 0.500 7

7.5 3750 750 0.099 7.5 3750 750 0.494 7.5

8 4000 800 0.098 8 4000 800 0.489 8

8.5 4250 850 0.097 8.5 4250 850 0.485 8.5

9 4500 900 0.096 9 4500 900 0.480 9

9.5 4750 950 0.095 9.5 4750 950 0.476 9.5

10 5000 1000 0.094 10 5000 1000 0.472 10

10.5 5250 1050 0.094 10.5 5250 1050 0.469 10.5

11 5500 1100 0.093 11 5500 1100 0.466 11

11.5 5750 1150 0.092 11.5 5750 1150 0.462 11.5

12 6000 1200 0.092 12 6000 1200 0.459 12

12.5 6250 1250 0.091 12.5 6250 1250 0.457 12.5

13 6500 1300 0.091 13 6500 1300 0.454 13

13.5 6750 1350 0.090 13.5 6750 1350 0.451 13.5

14 7000 1400 0.090 14 7000 1400 0.449 14


42/64

14.5 7250 1450 0.089 14.5 7250 1450 0.447 14.5

15 7500 1500 0.089 15 7500 1500 0.444 15

15.5 7750 1550 0.088 15.5 7750 1550 0.442 15.5

16 8000 1600 0.088 16 8000 1600 0.440 16

16.5 8250 1650 0.088 16.5 8250 1650 0.438 16.5

17 8500 1700 0.087 17 8500 1700 0.436 17

17.5 8750 1750 0.087 17.5 8750 1750 0.435 17.518 9000 1800 0.087 18 9000 1800 0.433 18

18.5 9250 1850 0.086 18.5 9250 1850 0.431 18.5

19 9500 1900 0.086 19 9500 1900 0.429 19

19.5 9750 1950 0.086 19.5 9750 1950 0.428 19.5

20 10000 2000 0.085 20 10000 2000 0.426 20

Relay-1 Relay-2 Relay-3 Relay-4

250 0.172 250 0.860 250 1.376 250 1.548 50

500 0.145 500 0.726 500 1.161 500 1.306 100

750 0.133 750 0.664 750 1.063 750 1.195 150

1250 0.120 1250 0.600 1250 0.959 1250 1.079 250

1500 0.116 1500 0.579 1500 0.927 1500 1.043 300

1750 0.113 1750 0.563 1750 0.901 1750 1.014 350

2000 0.110 2000 0.550 2000 0.880 2000 0.990 400

2250 0.108 2250 0.539 2250 0.862 2250 0.970 450

2750 0.104 2750 0.520 2750 0.833 2750 0.937 550

3000 0.103 3000 0.513 3000 0.821 3000 0.923 600

3250 0.101 3250 0.506 3250 0.810 3250 0.911 650

3500 0.100 3500 0.500 3500 0.800 3500 0.900 700

3750 0.099 3750 0.494 3750 0.791 3750 0.890 750

4000 0.098 4000 0.489 4000 0.783 4000 0.881 8004250 0.097 4250 0.485 4250 0.775 4250 0.872 850

4500 0.096 4500 0.480 4500 0.769 4500 0.865 900

4750 0.095 4750 0.476 4750 0.762 4750 0.857 950

5000 0.094 5000 0.472 5000 0.756 5000 0.850 1000

5250 0.094 5250 0.469 5250 0.750 5250 0.844 1050

5500 0.093 5500 0.466 5500 0.745 5500 0.838 1100

5750 0.092 5750 0.462 5750 0.740 5750 0.832 1150

6000 0.092 6000 0.459 6000 0.735 6000 0.827 1200

6250 0.091 6250 0.457 6250 0.731 6250 0.822 1250

6500 0.091 6500 0.454 6500 0.726 6500 0.817 1300

6750 0.090 6750 0.451 6750 0.722 6750 0.813 1350

7000 0.090 7000 0.449 7000 0.718 7000 0.808 1400

7250 0.089 7250 0.447 7250 0.715 7250 0.804 1450

7500 0.089 7500 0.444 7500 0.711 7500 0.800 1500

7750 0.088 7750 0.442 7750 0.708 7750 0.796 1550

8000 0.088 8000 0.440 8000 0.704 8000 0.792 1600

8250 0.088 8250 0.438 8250 0.701 8250 0.789 1650

8500 0.087 8500 0.436 8500 0.698 8500 0.786 1700

8750 0.087 8750 0.435 8750 0.695 8750 0.782 1750


43/64

9000 0.087 9000 0.433 9000 0.693 9000 0.779 1800

9250 0.086 9250 0.431 9250 0.690 9250 0.776 1850

9500 0.086 9500 0.429 9500 0.687 9500 0.773 1900

9750 0.086 9750 0.428 9750 0.685 9750 0.770 1950

10000 0.085 10000 0.426 10000 0.682 10000 0.767 2000


44/64


45/64


46/64


47/64


48/64


49/64

Relay-3 0.800 Relay-4 0.900

250 50 1.376 0.5 250 50 1.548 0.5 50

500 100 1.161 1 500 100 1.306 1 100

750 150 1.063 1.5 750 150 1.195 1.5 150

1250 250 0.959 2.5 1250 250 1.079 2.5 2501500 300 0.927 3 1500 300 1.043 3 300

1750 350 0.901 3.5 1750 350 1.014 3.5 350

2000 400 0.880 4 2000 400 0.990 4 400

2250 450 0.862 4.5 2250 450 0.970 4.5 450

2750 550 0.833 5.5 2750 550 0.937 5.5 550

3000 600 0.821 6 3000 600 0.923 6 600

3250 650 0.810 6.5 3250 650 0.911 6.5 650

3500 700 0.800 7 3500 700 0.900 7 700

3750 750 0.791 7.5 3750 750 0.890 7.5 750

4000 800 0.783 8 4000 800 0.881 8 800

4250 850 0.775 8.5 4250 850 0.872 8.5 850

4500 900 0.769 9 4500 900 0.865 9 900

4750 950 0.762 9.5 4750 950 0.857 9.5 950

5000 1000 0.756 10 5000 1000 0.850 10 1000

5250 1050 0.750 10.5 5250 1050 0.844 10.5 1050

5500 1100 0.745 11 5500 1100 0.838 11 1100

5750 1150 0.740 11.5 5750 1150 0.832 11.5 1150

6000 1200 0.735 12 6000 1200 0.827 12 1200

6250 1250 0.731 12.5 6250 1250 0.822 12.5 1250

6500 1300 0.726 13 6500 1300 0.817 13 1300

6750 1350 0.722 13.5 6750 1350 0.813 13.5 1350

7000 1400 0.718 14 7000 1400 0.808 14 1400


50/64

7250 1450 0.715 14.5 7250 1450 0.804 14.5 1450

7500 1500 0.711 15 7500 1500 0.800 15 1500

7750 1550 0.708 15.5 7750 1550 0.796 15.5 1550

8000 1600 0.704 16 8000 1600 0.792 16 1600

8250 1650 0.701 16.5 8250 1650 0.789 16.5 1650

8500 1700 0.698 17 8500 1700 0.786 17 1700

8750 1750 0.695 17.5 8750 1750 0.782 17.5 17509000 1800 0.693 18 9000 1800 0.779 18 1800

9250 1850 0.690 18.5 9250 1850 0.776 18.5 1850

9500 1900 0.687 19 9500 1900 0.773 19 1900

9750 1950 0.685 19.5 9750 1950 0.770 19.5 1950

10000 2000 0.682 20 10000 2000 0.767 20 2000

Relay-5

0.297

0.227

0.199

0.172

0.164

0.158

0.153

0.149

0.142

0.139

0.137

0.135

0.133

0.1310.129

0.128

0.127

0.125

0.124

0.123

0.122

0.121

0.120

0.119

0.118

0.117

0.117

0.116

0.115

0.114

0.114

0.113

0.113


51/64

0.112

0.112

0.111

0.110

0.110


52/64


53/64


54/64


55/64


56/64


57/64

Relay-5 0.100

10 0.297

20 0.227

30 0.199

50 0.17260 0.164

70 0.158

80 0.153

90 0.149

110 0.142

120 0.139

130 0.137

140 0.135

150 0.133

160 0.131

170 0.129

180 0.128

190 0.127

200 0.125

210 0.124

220 0.123

230 0.122

240 0.121

250 0.120

260 0.119

270 0.118

280 0.117


58/64

290 0.117

300 0.116

310 0.115

320 0.114

330 0.114

340 0.113

350 0.113360 0.112

370 0.112

380 0.111

390 0.110

400 0.110


59/64


60/64


61/64


62/64


63/64


64/64

i Dmt Relay Curve

Documents

Transcript of i Dmt Relay Curve