Under Study for Vizag Project-1 by-Rajiv Mishra (8141438209, 9899671326)

By-Rajiv Mishra (8141438209, 9899671326)

S.N. kVA Current

1 1000/1 1000 1 0.415 625 869.53 SLE 751A L&T

2 1250/1 1250 1 0.415 625 869.53 SLE 751A L&T

3 4000/1 4000 1 0.415 3200 4451.99 SLE 751A L&T

3 900/1

900 1 33 50000 874.80

SEL 787 L&T900 1 33 50000 874.80900 1 33 50000 874.80900 1 33 50000 874.80

4 3000/1

3000 1 11 3200 167.96

SLE 751AN/A

3000 1 11 3200 167.963000 1 11 3200 167.963000 1 11 3200 167.963000 1 11 3200 167.96

Feeder type or location

CT Ratio Amps

CT Primary current

CT secondary

currentVoltage

(kV)Relay Type

Relay Make

Setting at point A (Incomer of Y203) 0.415kV

Setting at point B (Outgoing of Y201) 0.415kV

Setting at point C1 Incomer-1&2

of Y201(415V Panel)

Outgoing-1&2 of Y101 (33kV

panel)

Incoming-1&2 of Y102 (11kV

Panel)

5 200/1

200 1 11 3200 167.96

SLE 751A N/A200 1 11 3200 167.96200 1 11 3200 167.96200 1 11 3200 167.96

6

900 1 11 3200 167.96900 1 11 3200 167.96

900 1 11 3200 167.96

7

400 1 11 3200 167.96400 1 11 3200 167.96

400 1 11 3200 167.96

8 400/1400 1 11 3200 167.96

#REF!400 1 11 3200 167.96400 1 11 3200 167.96

Outgoing to Transformer

(TR201)

Outgoing to Sync. Motor

01C01M (12000kW)


01C05M (6500kW)

Bucoupler of Y102 (11kV

Panel)

Plug setting

Protection type Plug setting range

50

0.87 86.95

OFF, 0.50-100.0A [5A nom]

35830 35.8350N51 OFF, 0.50-16.0A [5A nom]

51N

50

0.70 69.56

OFF, 0.50-100.0A [5A nom]

35840 28.67250N

51 OFF, 0.50-16.0A [5A nom]51N

50 38670 1.11 4000

51 Overcurrent relay 38670 #DIV/0! #DIV/0!

50 38670 #DIV/0! #DIV/0!

50 0.97 7250N 0.97 7251 0.97 72

51N 0.97 7250 0.06 16370

50N 0.06 1637051 0.06 16370

51N 0.06 1637051G 0.06 #REF!

Relay NEMA code

Plug set at (Branch

current/CT primary current)

in ℅Fault

current (If)

Fault current in relay coil

(If / CT Ratio)

Over current and earth fault relay


Instantaneous phase over current relay



50 0.84 21250N 0.84 21251 0.84 212

51N 0.84 21250Instantaneous phase overcurrent relay0.19 #REF!51Inverse time phase overcurrent relay0.19 #REF!

50NInstantaneous earth fault relay0.19 #REF!

50Instantaneous phase overcurrent relay0.42 #REF!51Inverse time phase overcurrent relay0.42 #REF!

50NInstantaneous earth fault relay0.42 #REF!

50Instantaneous phase overcurrent relay0.42 2280051Inverse time phase overcurrent relay0.42 22800

51N Inverse time earth fault relay 0.42 22800


Plug setting Time setting

41.21 0.10 0.06

0.00-5.0 Sec

41.22 0.22

0.00-5.0 Sec

0.40

8.69 1.40 0.442

#DIV/0! 1.40 #DIV/0!

#DIV/0! 1.40 #DIV/0!

PSM= Fault current in relay

coil / (Rated secondary of CT x

Relay setting)

Considered operating time (ts)

For normal inverse considering ά=.02 and ß=0.14

(TMS =t(s) x [(PSM)®-1] / ß))

Time setting range (sec) / TMS range

Considering operating time at

point A and grading

Characteristic Remarks

8

Normal Inverse (α=0.02, ß=0.14)


1 1 1 1Relay current setting 0.87 0.70 1.11 0.84

CT Ratio 1000 1250 4000 200

869.5289 869.5289 4451.988 167.96137TMS 0.055148 0.220592 0.220912 0.2399459

SECONDARY PRIMARY

Fault current (Amp)99 -0.181553 99 -0.726213 99 -0.421964 99 -3.194231

100 -0.182379 100 -0.729515 100 -0.423039 100 -3.255812200 -0.266554 200 -1.066217 200 -0.51401 200 9.6039545300 -0.366632 300 -1.466529 300 -0.588907 300 2.878893400 -0.501028 400 -2.00411 400 -0.657338 400 1.9189008500 -0.70151 500 -2.806041 500 -0.72282 500 1.5229671600 -1.044332 600 -4.177329 600 -0.787149 600 1.302492700 -1.783887 700 -7.135549 700 -0.851432 700 1.1600277800 -4.635931 800 -18.54372 800 -0.916451 800 1.059366900 11.20406 900 44.81622 900 -0.982817 900 0.98387

1000 2.757414 1000 11.02966 1000 -1.051056 1000 0.92478422000 0.459606 2000 1.838426 2000 -1.947997 2000 0.66138333000 0.307873 3000 1.231493 3000 -3.932982 3000 0.56603424000 0.249116 4000 0.996462 4000 -14.46007 4000 0.51317755000 0.21685 5000 0.867399 5000 13.30546 5000 0.47835226000 0.196021 6000 0.784085 6000 5.166662 6000 0.45312557000 0.181252 7000 0.725009 7000 3.401541 7000 0.43372158000 0.170117 8000 0.68047 8000 2.623043 8000 0.41816519000 0.161352 9000 0.645409 9000 2.181539 9000 0.40531

10000 0.154228 10000 0.616911 10000 1.895504 10000 0.394438911000 0.148293 11000 0.593171 11000 1.694158 11000 0.38507712000 0.143251 12000 0.573004 12000 1.544143 12000 0.376895513000 0.1389 13000 0.555598 13000 1.427657 13000 0.369658514000 0.135094 14000 0.540377 14000 1.334319 14000 0.363191715000 0.13173 15000 0.526918 15000 1.25766 15000 0.357363216000 0.128727 16000 0.514906 16000 1.193437 16000 0.352070917000 0.126024 17000 0.504098 17000 1.138744 17000 0.347234418000 0.123576 18000 0.494304 18000 1.091526 18000 0.342789419000 0.121343 19000 0.485373 19000 1.050285 19000 0.338683820000 0.119296 20000 0.477186 20000 1.013904 20000 0.334874721000 0.117411 21000 0.469643 21000 0.981531 21000 0.331326622000 0.115666 22000 0.462663 22000 0.952507 22000 0.328009923000 0.114045 23000 0.456179 23000 0.926309 23000 0.324899224000 0.112533 24000 0.450133 24000 0.902522 24000 0.3219733

Rated secondary current of CT

Relay current = Rated secondary current of

CT x Relay current setting X CT Ratio

A (Trip time) t(s) = (k x ß) / [(PSM)®-1]

B (Trip time) t(s) = (k x ß) / [(PSM)®-1]

C1 (Trip time) t(s) = (k x ß) / [(PSM)®-1]

D3 (Trip time) t(s) = (k x ß) / [(PSM)®-1]

25000 0.11112 25000 0.444479 25000 0.880808 25000 0.319213626000 0.109794 26000 0.439174 26000 0.860893 26000 0.316604227000 0.108546 27000 0.434184 27000 0.842548 27000 0.314131528000 0.10737 28000 0.429478 28000 0.825582 28000 0.311783229000 0.106258 29000 0.42503 29000 0.809837 29000 0.309548830000 0.105204 30000 0.420816 30000 0.795175 30000 0.307418931000 0.104204 31000 0.416817 31000 0.781481 31000 0.305385232000 0.103254 32000 0.413014 32000 0.768657 32000 0.303440333000 0.102348 33000 0.409392 33000 0.756614 33000 0.301577634000 0.101484 34000 0.405935 34000 0.74528 34000 0.299791235000 0.100658 35000 0.402633 35000 0.734589 35000 0.298075636000 0.099868 36000 0.399472 36000 0.724482 36000 0.296426237000 0.099111 37000 0.396444 37000 0.714911 37000 0.294838538000 0.098385 38000 0.393539 38000 0.70583 38000 0.293308639000 0.097687 39000 0.390749 39000 0.697199 39000 0.291832940000 0.097016 40000 0.388065 40000 0.688984 40000 0.29040841000 0.09637 41000 0.385482 41000 0.681152 41000 0.289030942000 0.095748 42000 0.382993 42000 0.673675 42000 0.287698943000 0.095148 43000 0.380592 43000 0.666527 43000 0.286409444000 0.094569 44000 0.378274 44000 0.659685 44000 0.285160245000 0.094009 45000 0.376034 45000 0.653129 45000 0.283948946000 0.093467 46000 0.373868 46000 0.646838 46000 0.282773747000 0.092943 47000 0.371772 47000 0.640797 47000 0.281632648000 0.092435 48000 0.369742 48000 0.634989 48000 0.280523949000 0.091944 49000 0.367774 49000 0.629399 49000 0.279446150000 0.091466 50000 0.365865 50000 0.624014 50000 0.278397751000 0.091003 51000 0.364013 51000 0.618823 51000 0.277377252000 0.090553 52000 0.362214 52000 0.613814 52000 0.276383453000 0.090116 53000 0.360466 53000 0.608977 53000 0.27541554000 0.089691 54000 0.358766 54000 0.604302 54000 0.274470955000 0.089278 55000 0.357112 55000 0.59978 55000 0.273550156000 0.088876 56000 0.355502 56000 0.595404 56000 0.272651657000 0.088484 57000 0.353934 57000 0.591165 57000 0.271774458000 0.088102 58000 0.352407 58000 0.587057 58000 0.270917659000 0.087729 59000 0.350917 59000 0.583073 59000 0.270080560000 0.087366 60000 0.349465 60000 0.579207 60000 0.269262161000 0.087012 61000 0.348047 61000 0.575454 61000 0.268461962000 0.086666 62000 0.346664 62000 0.571807 62000 0.267679

#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!

#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!

#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!#DIV/0!

1 1 1 1 By-Rajiv Mishra (8141438209, 9899671326)0.87 0.97 0.44 0.72

3000 900 2000 400

2624.396 874.7988 874.7988 288.930170.367774 0.3708255 1.109747 -0.004632

SECONDARY PRIMARY

99 -0.81151 99 -1.217486 99 -3.643497 99 0.0305965

100 -0.813925 100 -1.223005 100 -3.660016 100 0.0308833200 -1.026014 200 -1.785128 200 -5.342248 200 0.0884606300 -1.212941 300 -2.451532 300 -7.336555 300 -0.862032400 -1.394445 400 -3.34319 400 -10.00497 400 -0.099352500 -1.578612 500 -4.666414 500 -13.9649 500 -0.058796600 -1.770437 600 -6.910171 600 -20.67966 600 -0.044046700 -1.973921 700 -11.67075 700 -34.92637 700 -0.036317800 -2.192873 800 -29.0673 800 -86.988 800 -0.031513900 -2.431357 900 91.371954 900 273.4434 900 -0.028213

1000 -2.694028 1000 19.380093 1000 57.99766 1000 -0.0257912000 -9.500852 2000 3.1132497 2000 9.316838 2000 -0.0164363000 19.2206 3000 2.080473 3000 6.226108 3000 -0.0135334000 6.08286 4000 1.68186 4000 5.033203 4000 -0.0120175000 3.968211 5000 1.4632817 5000 4.379076 5000 -0.0110516000 3.087629 6000 1.3223004 6000 3.95717 6000 -0.0103687000 2.598459 7000 1.2223896 7000 3.658173 7000 -0.0098518000 2.284093 8000 1.1470942 8000 3.432841 8000 -0.0094429000 2.063351 9000 1.0878406 9000 3.255516 9000 -0.009108

10000 1.898831 10000 1.0396919 10000 3.111424 10000 -0.00882811000 1.770845 11000 0.9995892 11000 2.991411 11000 -0.00858812000 1.668019 12000 0.9655278 12000 2.889478 12000 -0.0083813000 1.583304 13000 0.9361344 13000 2.801514 13000 -0.00819714000 1.512093 14000 0.9104336 14000 2.724601 14000 -0.00803515000 1.451239 15000 0.8877119 15000 2.656603 15000 -0.00788916000 1.39852 16000 0.867434 16000 2.595918 16000 -0.00775717000 1.352316 17000 0.8491895 17000 2.541319 17000 -0.00763718000 1.311418 18000 0.8326584 18000 2.491847 18000 -0.00752719000 1.274906 19000 0.8175865 19000 2.446742 19000 -0.00742620000 1.242065 20000 0.8037693 20000 2.405393 20000 -0.00733221000 1.21233 21000 0.7910405 21000 2.3673 21000 -0.00724522000 1.185249 22000 0.7792627 22000 2.332053 22000 -0.00716423000 1.160457 23000 0.7683218 23000 2.299311 23000 -0.00708824000 1.137654 24000 0.758122 24000 2.268787 24000 -0.007017


E1 (Trip time) t(s) = (k x ß) / [(PSM)®-1]

F1 (Trip time) t(s) = (k x ß) / [(PSM)®-1]

G1 (Trip time) t(s) = (k x ß) / [(PSM)®-1]


25000 1.116591 25000 0.748582 25000 2.240237 25000 -0.00694926000 1.097061 26000 0.7396326 26000 2.213455 26000 -0.00688627000 1.078888 27000 0.7312143 27000 2.188262 27000 -0.00682628000 1.061925 28000 0.7232757 28000 2.164504 28000 -0.00676929000 1.046044 29000 0.7157721 29000 2.142049 29000 -0.00671630000 1.031136 30000 0.7086645 30000 2.120778 30000 -0.00666431000 1.017106 31000 0.7019185 31000 2.10059 31000 -0.00661532000 1.003872 32000 0.6955039 32000 2.081393 32000 -0.00656933000 0.991363 33000 0.6893938 33000 2.063108 33000 -0.00652434000 0.979514 34000 0.6835643 34000 2.045662 34000 -0.00648135000 0.96827 35000 0.6779942 35000 2.028993 35000 -0.0064436000 0.957582 36000 0.6726642 36000 2.013042 36000 -0.00640137000 0.947405 37000 0.6675573 37000 1.997759 37000 -0.00636338000 0.937699 38000 0.6626579 38000 1.983097 38000 -0.00632639000 0.92843 39000 0.6579519 39000 1.969014 39000 -0.00629140000 0.919566 40000 0.6534266 40000 1.955471 40000 -0.00625741000 0.911079 41000 0.6490705 41000 1.942435 41000 -0.00622442000 0.902941 42000 0.644873 42000 1.929873 42000 -0.00619343000 0.89513 43000 0.6408244 43000 1.917757 43000 -0.00616244000 0.887625 44000 0.6369159 44000 1.90606 44000 -0.00613245000 0.880406 45000 0.6331393 45000 1.894758 45000 -0.00610446000 0.873456 46000 0.6294871 46000 1.883829 46000 -0.00607647000 0.866757 47000 0.6259526 47000 1.873251 47000 -0.00604948000 0.860295 48000 0.6225292 48000 1.863006 48000 -0.00602349000 0.854057 49000 0.6192112 49000 1.853077 49000 -0.00599750000 0.848029 50000 0.615993 50000 1.843446 50000 -0.00597351000 0.842201 51000 0.6128696 51000 1.834099 51000 -0.00594952000 0.836561 52000 0.6098363 52000 1.825021 52000 -0.00592553000 0.831099 53000 0.6068887 53000 1.8162 53000 -0.00590254000 0.825806 54000 0.6040226 54000 1.807623 54000 -0.0058855000 0.820673 55000 0.6012344 55000 1.799278 55000 -0.00585856000 0.815693 56000 0.5985203 56000 1.791156 56000 -0.00583757000 0.810858 57000 0.5958771 57000 1.783246 57000 -0.00581758000 0.806161 58000 0.5933016 58000 1.775538 58000 -0.00579759000 0.801595 59000 0.5907908 59000 1.768025 59000 -0.00577760000 0.797155 60000 0.5883421 60000 1.760696 60000 -0.00575861000 0.792834 61000 0.5859528 61000 1.753546 61000 -0.00573962000 0.788628 62000 0.5836204 62000 1.746566 62000 -0.005721

By-Rajiv Mishra (8141438209, 9899671326)

99

20

04

00

60

08

00

10

00

30

00

50

00

70

00

90

00

11

00

01

30

00

15

00

01

70

00

19

00

02

10

00

23

00

02

50

00

27

00

02

90

00

31

00

03

30

00

35

00

03

70

00

39

00

04

10

00

43

00

04

50

00

47

00

04

90

00

51

00

05

30

00

55

00

05

70

00

59

00

06

10

00

0.0

10

.11

10

Curve for point G1curve for point F1Curve for point E1curve for point D2Curve for point D3Curve for point C1Curve for point Bcurve for point A

99

20

04

00

60

08

00

10

00

30

00

50

00

70

00

90

00

11

00

01

30

00

15

00

01

70

00

19

00

02

10

00

23

00

02

50

00

27

00

02

90

00

31

00

03

30

00

35

00

03

70

00

39

00

04

10

00

43

00

04

50

00

47

00

04

90

00

51

00

05

30

00

55

00

05

70

00

59

00

06

10

00

0.0

10

.11

10

Curve for point G1curve for point F1Curve for point E1curve for point D2Curve for point D3Curve for point C1Curve for point Bcurve for point A

By-Rajiv Mishra (8141438209, 9899671326)Setting at point Ai)PlugsettingLoad Branch currentCT primaryCT secondary

Plug set at

Fault currentFault current in relay coilPickup current

Plug setting multiplier for faultii) TMS setting If operating time considered .1S

For normal inverse

Calculated TMS

Setting at point Bi)PlugsettingLoad Branch currentCT primaryCT secondary

Plug set at


Plug setting multiplier for faultii) TMS setting Operating time of relay at point AGradingRequired operating time of relay at B

For normal inverse

Calculated TMS

Setting at point C1i)PlugsettingLoad Branch currentCT primaryCT secondary

Plug set at


Plug setting multiplier for faultii) TMS setting Operating time of relay at point BGrading

Required operating time of relay at C1

For normal inverse

Calculated TMS

Setting at point D3IDMT setting

i)PlugsettingLoad

Branch currentCT primaryCT secondary

Plug set at

Fault current in relay coilPickup current

Fault current or inrush current whichever is higher value (Fault current- 218A, Inrush curent will be 4.5 times of normal current)

Plug setting multiplier for faultii) TMS setting Operating time of relay at point BGradingRequired operating time of relay at C1

For normal inverse

Calculated TMS

Setting at point E1i)PlugsettingLoad Branch currentCT primaryCT secondaryPlug set at



For normal inverse

Calculated TMS

Setting at point F1IDMT settingi)PlugsettingLoad Branch currentCT primaryCT secondaryPlug set at

Fault current in relay coilPickup current


For normal inverse

Calculated TMS

Setting at point G1i)PlugsettingLoad Branch currentCT primaryCT secondaryPlug set at



For normal inverse

Calculated TMS

Fault current or inrush current whichever is higher value (Fault current- 72A, Inrush curent will be 4.5 times of normal current)

625 kVA869.5 IA1000

1

0.87

OR 86.95 ℅

35830 IfIf / CT Ratio 35.83Rated secondary of CT X relay setting 0.870

41.21 PSM

t(s) 0.1 secά 0.02ß 0.14

TMS =k=t(s) x [(PSM)®-1] / ß 0.055

625 kVA869.5 IA1250

1

0.70OR

69.56 ℅35830 If

If / CT Ratio 28.664Rated secondary of CT X relay setting 0.696

41.21 PSM

0.1 sec0.3 sec

t(s) 0.4 secά 0.02ß 0.14

plug will be set at nearest point

If / IR (fault current in relay coil / pickup current) = (Fault current / CT Ratio) / (Rated secondary of CT X relay setting)

TMS will be set at nearest point



TMS =k=t(s) x [(PSM)®-1] / ß 0.221

3200 kVA4452.0 IA

40001

1.113OR

111.30 ℅38670 If


8.69 PSM

0.4 sec0.3 sec

t(s) 0.7 secά 0.02ß 0.14

TMS =k=t(s) x [(PSM)®-1] / ß 0.221

3200 kVA

168.0 IA200

1

0.84OR

83.98 ℅

755.8 IfIf / CT Ratio 3.77913079991602Rated secondary of CT X relay setting 0.840






4.50 PSM

0.7 sec0.4 sec

t(s) 1.1 secά 0.02ß 0.14

TMS =k=t(s) x [(PSM)®-1] / ß 0.240

50000 kVA2624.4 IA

30001

0.87OR

87.48 ℅15970 If, 16370


6.09 PSM

1.1 sec0.3 sec

t(s) 1.4 secά 0.02ß 0.14

TMS =k=t(s) x [(PSM)®-1] / ß 0.368

50000 kVA874.8 IA

9001

0.97OR





CTR₁CTR₂

97.20 ℅

3936.59458324585 IfIf / CT Ratio 4.37399398138428Rated secondary of CT X relay setting 0.972

4.50 PSM

1.4 sec0.3 sec

t(s) 1.7 secά 0.02ß 0.14

TMS =k=t(s) x [(PSM)®-1] / ß 0.371

50000 kVA874.8 IA2000

10.44OR

43.74 ℅31030 If


35.47 PSM

1.7 sec0.4 sec

t(s) 2.1 secά 0.02ß 0.14

TMS =k=t(s) x [(PSM)®-1] / ß 1.110





Setting at point D2

i)PlugsettingLoad 6500

Branch current 3142.6CT primary 400CT secondary 1

Plug set at 7.86OR

785.66

Fault current 2270Fault current in relay coil 0 5.675Pickup current Rated secondary of CT X relay sett 7.857

Plug setting multiplier for fault 0.72ii) TMS setting

Required operating time of relay at C1 t(s) 0.1

For normal inverseά 0.02ß 0.14

Calculated TMS TMS =k=t(s) x [(PSM)®-1] / ß -0.005


kW

18855.767278.249260.7949979

℅

If 208

IA , Considering 6 times starting current

PSM

sec

0

By-Rajiv Mishra (8141438209, 9899671326)

S.N. Voltage (kV) kVA Current

1 2000/1

2000 1 33 50000 874.80

SLE 751A L&T

2000 1 33 50000 874.802000 1 33 50000 874.802000 1 33 50000 874.802000 1 33 50000 874.802000 1 33 50000 874.802000 1 33 50000 874.802000 1 33 50000 874.80

2 2000/1

2000 1 33 50000 874.80

SLE 751A L&T

2000 1 33 50000 874.802000 1 33 50000 874.802000 1 33 50000 874.802000 1 33 50000 874.802000 1 33 50000 874.802000 1 33 50000 874.80

3 900/1

900 1 33 50000 874.80

SEL 787

L&T

900 1 33 50000 874.80900 1 33 50000 874.80900 1 33 50000 874.80900 1 33 50000 874.80900 1 33 50000 874.80900 1 33 50000 874.80 VAJH 13900 1 33 50000 874.80 VAX31900 1 33 50000 874.80 VAA-11

900 1 33 50000 874.80

4 3000/1

3000 1 11 3200 167.96

SLE 751A

N/A

3000 1 11 3200 167.963000 1 11 3200 167.963000 1 11 3200 167.963000 1 11 3200 167.963000 1 11 3200 167.963000 1 11 3200 167.963000 1 11 3200 167.963000 1 11 3200 167.96 VAJH 133000 1 11 3200 167.96 VAJS 133000 1 11 3200 167.96 VAX 313000 1 11 3200 167.96

5 200/1

200 1 11 3200 167.96

SLE 751AN/A

200 1 11 3200 167.96200 1 11 3200 167.96200 1 11 3200 167.96200 1 11 3200 167.96 VAJH 13

Feedert type or location

CT Ratio Amps

CT Primary current

CT secondary

currentRelay Type

Relay Make

Incomer-1&2 of Y101 (33kV

panel)


Panel)

Outgoing-1&2 of Y101 (33kV

panel)

Incoming-1&2 of Y102 (11kV

Panel)


(TR201)

5 200/1

200 1 11 3200 167.96 VAX 31

N/A

6 900/1

900 1 11 3200 167.96

SEL710

N/A

900 1 11 3200 167.96900 1 11 3200 167.96900 1 11 3200 167.96900 1 11 3200 167.96900 1 11 3200 167.96900 1 11 3200 167.96900 1 11 3200 167.96900 1 11 3200 167.96900 1 11 3200 167.96900 1 11 3200 167.96 VAJH 13900 1 11 3200 167.96 VAJS 13900 1 11 3200 167.96 VAX 31900 1 11 3200 167.96 SEL551C

7 400/1

400 1 11 3200 167.96

SEL710

N/A

400 1 11 3200 167.96400 1 11 3200 167.96400 1 11 3200 167.96400 1 11 3200 167.96400 1 11 3200 167.96400 1 11 3200 167.96400 1 11 3200 167.96400 1 11 3200 167.96400 1 11 3200 167.96400 1 11 3200 167.96 VAJH 13400 1 11 3200 167.96 VAJS 13400 1 11 3200 167.96 VAX 31400 1 11 3200 167.96 SEL551C

8 400/1

400 1 11 3200 167.96

N/A

400 1 11 3200 167.96400 1 11 3200 167.96400 1 11 3200 167.96400 1 11 3200 167.96 VSYNC400 1 11 3200 167.96 VAJH 13400 1 11 3200 167.96 VAJS 13400 1 11 3200 167.96 VAX 31

9 4000/14000 1 0.415 3200 4451.99 SLE 751A

N/A4000 1 0.415 3200 4451.994000 1 0.415 3200 4451.99

10 4000/14000 1 0.415 3200 4451.99 SLE 751A

N/A4000 1 0.415 3200 4451.994000 1 0.415 3200 4451.99

11 4000/14000 1 0.415 3200 4451.99

N/A4000 1 0.415 3200 4451.994000 1 0.415 3200 4451.99

12 4000/14000 1 0.415 3200 4451.99 SLE 751A

N/A4000 1 0.415 3200 4451.99


(TR201)


01C01M (12000kW)


01C05M (6500kW)


Panel)

Incomer-1&2 of Y201(415V

Panel)

Buscoupler of Y201 (415V

panel)

Incomer-1&2 of Y202(415V

Panel)


panel)

12 4000/14000 1 0.415 3200 4451.99

N/A

13 1000/11000 1 0.415 3200 4451.99 SLE 751A

N/A1000 1 0.415 3200 4451.99


panel)

Incomer-1,2&3 of Y203(415V

Panel)

Relay Range

Protection type

50


31030 0.44

50N 31030 0.4451 31030 0.44

51N 31030 0.4427 Undervoltage relay 31030 0.4459 Over voltage realy 31030 0.4495 Trip circuit supervision relay 31030 0.4486 Master tripping ralay 31030 0.4450


31100 0.4450N 31100 0.4451 31100 0.44

51N 31100 0.4425 Check synchronising realy 31100 0.4486 Master tripping ralay 31100 0.4495 Trip circuit supervision relay 31100 0.4450


72 0.9750N 72 0.9751 72 0.97

51N 72 0.9787T Transformer differential relay 72 0.9764 Restricted earth fault relay 72 0.9786 Master tripping ralay 72 0.9795 Trip circuit supervision relay 72 0.9794 72 0.97

63TX Auxilary relay for transformer protection 72 0.97

50


16370 0.0650N 16370 0.0651 16370 0.06

51N 16370 0.0627 Undervoltage relay 16370 0.0659 Over voltage realy 16370 0.062 Time delay relay 16370 0.06

VSYNC 16370 0.0686x Master tripping ralay 16370 0.0652x 16370 0.0695 Trip circuit supervision relay 16370 0.06

51G 16370 0.0650


212 0.8450N 212 0.8451 212 0.84

51N 212 0.8486 Master tripping ralay 212 0.84

Relay NEMA code

Plug setting range

Time setting range (sec) / TMS range

Fault current in relay

coil

Plug set at

95 Trip circuit supervision relay 212 0.8466 3950 0.1949 Thermal O/L Relay 3950 0.1950 Instantaneous phase overcurrent relay 3950 0.1951 Inverse time phase overcurrent relay 3950 0.19

50N Instantaneous earth fault relay 3950 0.1951L/R 3950 0.19

46 Negative phase sequence relay 3950 0.19HM Hour meter 3950 0.1964 3950 0.19HR 3950 0.1986x Master tripping ralay 3950 0.1952x 3950 0.1995 Trip circuit supervision relay 3950 0.19

87M 3950 0.1966 2270 0.4249 Thermal O/L Relay 2270 0.4250 Instantaneous phase overcurrent relay 2270 0.4251 Inverse time phase overcurrent relay 2270 0.42

50N Instantaneous earth fault relay 2270 0.4251L/R 2270 0.42

46 Negative phase sequence relay 2270 0.42HM Hour meter 2270 0.4264 2270 0.42HR 2270 0.4286x 2270 0.4252x 2270 0.4295 Trip circuit supervision relay 2270 0.42

87M 2270 0.4250 Instantaneous phase overcurrent relay 22800 0.4251 Inverse time phase overcurrent relay 22800 0.42

51N Inverse time earth fault relay 22800 0.422 Time delay relay 22800 0.42

22800 0.4286x Hour meter 22800 0.4252x 22800 0.4295 Trip circuit supervision relay 22800 0.42

38670 1.1164R 38670 1.1186 38670 1.11

44400 1.1186 44400 1.1180 44400 1.110 38660 1.11

64R 38660 1.1186 38660 1.11

44500 1.1186 44500 1.11

80 44500 1.11

35840 4.45

86 35840 4.45

27, 59, 51, 51G, 50, 2, 25, 97

Proposed settings

t(s) Characteristic Remarks

2000 35.47 0.60 0.317

2000 35.47 0.60 0.3172000 35.47 0.60 0.3172000 35.47 0.60 0.3172000 35.47 0.60 0.3172000 35.47 0.60 0.3172000 35.47 0.60 0.3172000 35.47 0.60 0.3172000 35.55 0.70 0.3702000 35.55 0.70 0.3702000 35.55 0.70 0.3702000 35.55 0.70 0.3702000 35.55 0.70 0.3702000 35.55 0.70 0.3702000 35.55 0.70 0.370900 0.08 0.80 -0.278900 0.08 0.80 -0.278900 0.08 0.80 -0.278900 0.08 0.80 -0.278900 0.08 0.80 -0.278900 0.08 0.80 -0.278900 0.08 0.80 -0.278900 0.08 0.80 -0.278900 0.08 0.80 -0.278

900 0.08 0.80 -0.278

3000 97.46 0.90 0.6173000 97.46 0.90 0.6173000 97.46 0.90 0.6173000 97.46 0.90 0.6173000 97.46 0.90 0.6173000 97.46 0.90 0.6173000 97.46 0.90 0.6173000 97.46 0.90 0.6173000 97.46 0.90 0.6173000 97.46 0.90 0.6173000 97.46 0.90 0.6173000 97.46 0.90 0.617200 1.26 1.00 0.033200 1.26 1.00 0.033200 1.26 1.00 0.033200 1.26 1.00 0.033200 1.26 1.00 0.033

CT Ratio

Plug setting

multiplier (PSM)

Time setting (sec) / TMS


200 1.26 1.00 0.033900 23.52 1.10 0.512900 23.52 1.10 0.512900 23.52 1.10 0.512900 23.52 1.10 0.512900 23.52 1.10 0.512900 23.52 1.10 0.512900 23.52 1.10 0.512900 23.52 1.10 0.512900 23.52 1.10 0.512900 23.52 1.10 0.512900 23.52 1.10 0.512900 23.52 1.10 0.512900 23.52 1.10 0.512900 23.52 1.10 0.512400 13.52 1.20 0.458400 13.52 1.20 0.458400 13.52 1.20 0.458400 13.52 1.20 0.458400 13.52 1.20 0.458400 13.52 1.20 0.458400 13.52 1.20 0.458400 13.52 1.20 0.458400 13.52 1.20 0.458400 13.52 1.20 0.458400 13.52 1.20 0.458400 13.52 1.20 0.458400 13.52 1.20 0.458400 13.52 1.20 0.458400 135.75 1.30 0.958400 135.75 1.30 0.958400 135.75 1.30 0.958400 135.75 1.30 0.958400 135.75 1.30 0.958400 135.75 1.30 0.958400 135.75 1.30 0.958400 135.75 1.30 0.958

4000 8.69 1.40 0.4424000 8.69 1.40 0.4424000 8.69 1.40 0.4424000 9.97 1.50 0.5044000 9.97 1.50 0.5044000 9.97 1.50 0.5044000 8.68 1.40 0.4424000 8.68 1.40 0.4424000 8.68 1.40 0.4424000 10.00 1.50 0.5054000 10.00 1.50 0.505

4000 10.00 1.50 0.505

1000 8.05 1.40 0.426

1000 8.05 1.40 0.426

Under Study for Vizag Project-1 by-Rajiv Mishra (8141438209, 9899671326)

Documents

Transcript of Under Study for Vizag Project-1 by-Rajiv Mishra (8141438209, 9899671326)