08 Distance Calculation Sheet

Setting Calculation for Distance Protection Scheme Name os S/S Feeder Name Type of Circuit Type of Conductor

132KV Bhadsahapur 132KV Bhadsahapur - Samayapur Single Circuit Zebra

SYSTEM DATA CT

Primary Secondary

800 Amps 1 Amps

PT

Primary Secondary

132 K Volts 110 Volts

CTR PTR CTR/PTR

800 1200 0.666666667

Positive Sequence Impedance: Ohms/KM/Phase/Ckt: 0.02936+j 0.30716 Zero Sequence Impedance: Ohms/KM/Phase/Ckt: 0.27566+j 1.0715 Parallel Line Mutal Impedance: 0.22806+j 0.6221 Positive Sequence Resistance:R Ohm/Ph/KM R1 Primary 0.02936 Positive Sequence Reactance:X Ohm/Ph/KM X1 Primary 0.30716 Zero Sequence Resistance:R Ohm/Ph/KM Ro Primary 0.27566 Zero Sequence Reactance:X Ohm/Ph/KM Xo Primary 1.0715 Parallel Line Mutual Resistance:R Ohm/Ph/KM Rom Primary 0.22806 Parallel Line Mutual Reactance:X Ohm/Ph/KM Xom Primary 0.6221 Arc Resistance:

10

Ohms

(assumed)

Tower Foot R

15

Ohms

(assumed)

Line Angle

84.53 degree

Length of Protected Line

50 KM

Length of Adjacent Shortest Line

75 KM

Length of Adjacent Longest Line

100 KM

1

Siemens Ltd.,PTD-EA,Gurgaon

D(Z1) D(Z1B) D(Z2) D(Z3) D(Z4)

80 120 100 1.2 25

% of Protected line % of Zone-1 % of Protected line + (Protected Line + Longest Second Line) % of Zone-1

Distance D1 D1B D2 D3 D4

Zone 1 Zone 1B Zone 2 Zone 3 Zone 4

40 48 87.5 180 10

Reactance X1 X1B X2 X3 X4

Zone 1 Zone 1B Zone 2 Zone 3 Zone 4

Resistance R1 R1B R2 R3 R4 Impedance Z1 Z1B Z2 Z3 Z4

KM KM KM KM KM

Forward Forward Forward Forward Reverse

8.191 9.829 17.918 36.859 2.048

Ohms/Ph Ohms/Ph Ohms/Ph Ohms/Ph Ohms/Ph

Forward Forward Forward Forward Reverse

Zone 1 Zone 1B Zone 2 Zone 3 Zone 4

0.783 0.940 1.713 3.523 0.196

Ohms/Ph Ohms/Ph Ohms/Ph Ohms/Ph Ohms/Ph

Forward Forward Forward Forward Reverse

Zone 1 Zone 1B Zone 2 Zone 3 Zone 4

8.228 9.874 17.999 37.027 2.057

Ohms/Ph Ohms/Ph Ohms/Ph Ohms/Ph Ohms/Ph

Forward Forward Forward Forward Reverse

50

% of Adjacent shortest Line

Phase - Phase R1 R1B R2 R3 R4

Settings to be done in Digsi Address 110 112 113 121

Description

Set Value Device Configuation Trip Mode 21 Phase Distance 21 Ground Distance 85-21 Pilot Protn

1/3 Pole Quadrilateral Quadrilateral PUTT(Z1B)

201 203 204 205 206

Power System Data1 CT Star Point Rated Primary Voltage Rated Secondary Voltage Rated Primary Current Rated Secondary Current

Toward Line 400 KV 110 V 1000 A 1A

1105 1110 1111 1116

Power System Data 2 Line Angle x- line Reactance(secondary) Line Length RG/RL

84.53 10.23866667 50 2.77

2

Siemens Ltd.,PTD-EA,Gurgaon

1117 1126 1127

XG/XL RM/RL XM/XL

-0.08 2.589 0.675

21 Distance - Quadrilateral 1301 1302 1303 1304 1351 1352 1353 1354 1311 1312 1313 1314 1321 1322 1323 1324 1331 1332 1333 1334

Operating Mode Z1 R Ph-Ph Z1 X Z1 R G Z1 Operating Mode Z1B R Ph-Ph Z1B X Z1B R G Z1B Operating Mode Z2 R Ph-Ph Z2 X Z2 R G Z2 Operating Mode Z3 R Ph-Ph Z3 X Z3 R G Z3 Operating Mode Z4 R Ph-Ph Z4 X Z4 R G Z4

Forward 4.116 8.191 17.450 Forward 4.273 9.829 17.606 Forward 5.046 17.918 18.379 Forward 6.857 36.859 20.190 Reverse 3.529 2.048 16.862

3

Siemens Ltd.,PTD-EA,Gurgaon

stance Protection Scheme

Earth Compensation Factor: Ko = Angle =

0.308560003 #NAME?

6.666666667 Ohms

Secondary

10 Ohms

Secondary

4

Siemens Ltd.,PTD-EA,Gurgaon

% of Adjacent shortest Line

Phase - Phase 4.116266667 4.272853333 5.046 6.856533333 3.529066667

Phase - Earth R1e R1Be R2e R3e R4e

17.450 17.606 18.379 20.190 16.862

5

Siemens Ltd.,PTD-EA,Gurgaon

6

Siemens Ltd.,PTD-EA,Gurgaon