Sample calculation for Distance relay setting for 132 KV lines...
Easun Reyrolle Limited, India
INPUT DATA for CSC 101 / CSC 162 Relays: 1 Voltage Level (KV) 2 PT Ratio 3 CT Ratio 4 Positive seq. Resistance(R1) / Km 5 Positive seq. Reactance(X1) / Km 6 Zero seq. Resistance(R0) / Km 7 Zero seq. Resistance(X0) / Km 8 Line Length (Km) 9 Maximum Load Current (Primary in A) 10 Operating Power Factor 11 Zone 1 Settings required in % 12 Zone 2 Settings required in % 13 Zone 3 Settings required in % 14 Zone 4 Settings required in % 15 Zero Seq. Mutual Reactance (Xm0)
Fill the following Data 132.0000 1200 400.0000 0.1540 0.3870 0.3030 1.4096 9.5571 400.0000 0.8550 80.0000 150.0000 400.0000 25.0000 0.0000
SETTINGS TO BE ADOPTED (CT Secondary Rated : 1A, PT Secondary : 110V P-P) 1 KV, CTR, LL
( As It Is)
2 Kr
0.323
3 Kx
0.881
4 Km
0.000
5 R_Line
0.491
6 X_Line
1.233
7 R1_PE
0.986
8 X1_PE
0.986
9 R2_PE
2.585
10 X2_PE
1.849
11 R3_PE
6.894
12 X3_PE
4.931
13 R4_PE
0.431
14 X4_PE
0.308
15 R1_PP
0.986
16 X1_PP
0.986
17 R2_PP
2.585
18 X2_PP
1.849
19 R3_PP
6.894
20 X3_PP
4.931
21 R4_PP
0.431
22 X4_PP
0.308
23 Max Load Resistance Observed on Ohms
32.300
Note : Select the Resitance Value of the Z3 or Z4 such that it should be less than the Max. Load Resistance Calculated Created By: G.Mahendiran Deputy Manager - Product Management Easun Reyrolle Limited Hosur, India - 635 126 Moile : +91 99524 25301. Email :
[email protected] All Rights Reserved to M/s. Eaun Reyrolle Limited., Any form of Reproduction of this copy is prohibited.
EASUN REYROLLE LIMITED, xxxxxxxxxxxxxxxxx INPUT DATA for CSC 101 / CSC 162 Relays:
INPUT
1
Voltage Level (KV)
132
2
PT Ratio
1200
3
CT Ratio
400
4
Positive seq. Resistance(R1) / Km
0.154
5
Positive seq. Reactance(X1) / Km
0.387
6
Zero seq. Resistance(R0) / Km
0.303
7
Zero seq. Resistance(X0) / Km
1.4096
8
Line Length (Km)
9.5571
9
Maximum Load Current (Primary in A)
10
Power Factor
11
Zone 1 Settings required in %
80
12
Zone 2 Settings required in %
150
13
Zone 3 Settings required in %
400
14
Zone 4 Settings required in %
25
15
Zero Seq. Mutual Reactance (Xm0)
0
400 0.855
Zone 2 Ph-E Fault: R2_pe
0.7358967
X2_pe
1.84929885
max(x2_pe/2,25/LZ+R_line)
8.8239311333
INDIA
R2_pe derived (as per Manual)
0.7358967
X2_pe Rect
0.924649425
Min(8*X2_Rect, R2_pe/4)
0.183974175
R2_pe Rect
1.84929885
R2_pe to be Set
2.58519555
Zone 2 Ph-Ph Fault: R2_pp
0.7358967
X2_pp
1.84929885
max(x2_pp/2,15/LZ+R_line)
5.4905978
R2_pp derived (as per Manual)
0.7358967
X2_pp Rect
0.924649425
Min(8*X2_Rect, R2_pp/4)
0.183974175
R2_pp Rect
1.84929885
R2_pp to be Set
2.58519555
Zone 4 Ph-E Fault: R4_pe
0.12264945
X4_pe
0.308216475
max(x4_pe/2,25/LZ+R_line) R4_pe derived (as per Manual)
8.8239311333 0.12264945
X4_pe Rect
0.1541082375
Min(8*X4_Rect, R4_pe/4)
0.0306623625
R4_pe Rect
0.308216475
R4_pe to be Set
0.430865925
Zone 4 Ph-Ph Fault: R4_pp
0.12264945
X4_pp max(x4_pp/2,15/LZ+R_line) R4_pp derived (as per Manual)
0.308216475 5.4905978 0.12264945
X4_pp Rect
0.1541082375
Min(8*X4_Rect, R4_pp/4)
0.0306623625
R4_pp Rect
0.308216475
R4_pp to beSet
0.430865925
ED,
INDIA
COMMON PARAMETERS: CTR / PTR
0.3333333333
Kr
0.3225108225
Kx
0.8807924203
km R_Line
0.4905978
X_line
1.2328659
Zone 1 Ph-E Fault: R1_pe
0.39247824
X1_pe
0.98629272
max(x1_pe/2,25/LZ+R_line)
8.8239311333
R1_pe derived (as per Manual)
0.39247824
X1_pe Rect
0.49314636
Min(8*X1_Rect, R1_pe/4)
0.09811956
R1_pe Rect
0.98629272
R1_pe to be Set
0.98629272
Zone 1 Ph-Ph Fault: R1_pp
0.39247824
X1_pp
0.98629272
max(x1_pp/2,15/LZ+R_line)
5.4905978
R1_pp derived (as per Manual)
0.39247824
X1_pp Rect
0.49314636
Min(8*X1_Rect, R1_pp/4)
0.09811956
R1_pp Rect
0.98629272
R1_pp to be Set
0.98629272
Zone 3 Ph-E Fault: R3_pe
1.9623912
X3_pe
4.9314636
max(x3_pe/2,25/LZ+R_line)
8.8239311333
R3_pe derived (as per Manual)
1.9623912
X3_pe Rect
2.4657318
Min(8*X3_Rect, R3_pe/4)
0.4905978
R3_pe Rect
4.9314636
R3_pe to be Set
6.8938548
Zone 3 Ph-Ph Fault: R3_pp
1.9623912
X3_pp
4.9314636
max(x3_pp/2,15/LZ+R_line)
5.4905978
R3_pp derived (as per Manual)
1.9623912
X3_pp Rect
2.4657318
Min(8*X3_Rect, R3_pp/4)
0.4905978
R3_pp Rect
4.9314636
R3_pp to be Set
6.8938548
Maximum Load Resistance: Theta (DEGREES(ACOS(PF)))
31.2402652162
Factor = (K re * 0.9) / (K rel * K ss* IL max)
0.0013701923
Factor * KV
180.8653846154
63.4 - Theta
32.1597347838
Sin(63.4 - Theta) / Sin 63.4 Load Resistance Primary Load Resistance Secondary 90% of Load Resistance
0.5952904447 107.6674352467 35.8891450822 32.300230574
