5-130
B30 Bus Differential System
GE Multilin
5.6 GROUPED ELEMENTS
5 SETTINGS
5
IAC CURVES:
The curves for the General Electric type IAC relay family are derived from the formulae:
,
(EQ 5.6)
where:
T
= operate time (in seconds),
TDM
= Multiplier setting,
I
= Input current,
I
pkp
= Pickup Current setting,
A to
E
=
constants,
t
r
= characteristic constant, and
T
RESET
= reset time in seconds (assuming energy capacity is 100%
and
RESET
is “Timed”)
Table 5–16: GE TYPE IAC INVERSE TIME CURVE CONSTANTS
IAC CURVE SHAPE
A
B
C
D
E
T
R
IAC Extreme Inverse
0.0040
0.6379
0.6200
1.7872
0.2461
6.008
IAC Very Inverse
0.0900
0.7955
0.1000
–1.2885
7.9586
4.678
IAC Inverse
0.2078
0.8630
0.8000
–0.4180
0.1947
0.990
IAC Short Inverse
0.0428
0.0609
0.6200
–0.0010
0.0221
0.222
Table 5–17: IAC CURVE TRIP TIMES
MULTIPLIER
(TDM)
CURRENT (
I
/
I
pickup
)
1.5
2.0
3.0
4.0
5.0
6.0
7.0
8.0
9.0
10.0
IAC EXTREMELY INVERSE
0.5
1.699
0.749
0.303
0.178
0.123
0.093
0.074
0.062
0.053
0.046
1.0
3.398
1.498
0.606
0.356
0.246
0.186
0.149
0.124
0.106
0.093
2.0
6.796
2.997
1.212
0.711
0.491
0.372
0.298
0.248
0.212
0.185
4.0
13.591
5.993
2.423
1.422
0.983
0.744
0.595
0.495
0.424
0.370
6.0
20.387
8.990
3.635
2.133
1.474
1.115
0.893
0.743
0.636
0.556
8.0
27.183
11.987
4.846
2.844
1.966
1.487
1.191
0.991
0.848
0.741
10.0
33.979
14.983
6.058
3.555
2.457
1.859
1.488
1.239
1.060
0.926
IAC VERY INVERSE
0.5
1.451
0.656
0.269
0.172
0.133
0.113
0.101
0.093
0.087
0.083
1.0
2.901
1.312
0.537
0.343
0.266
0.227
0.202
0.186
0.174
0.165
2.0
5.802
2.624
1.075
0.687
0.533
0.453
0.405
0.372
0.349
0.331
4.0
11.605
5.248
2.150
1.374
1.065
0.906
0.810
0.745
0.698
0.662
6.0
17.407
7.872
3.225
2.061
1.598
1.359
1.215
1.117
1.046
0.992
8.0
23.209
10.497
4.299
2.747
2.131
1.813
1.620
1.490
1.395
1.323
10.0
29.012
13.121
5.374
3.434
2.663
2.266
2.025
1.862
1.744
1.654
IAC INVERSE
0.5
0.578
0.375
0.266
0.221
0.196
0.180
0.168
0.160
0.154
0.148
1.0
1.155
0.749
0.532
0.443
0.392
0.360
0.337
0.320
0.307
0.297
2.0
2.310
1.499
1.064
0.885
0.784
0.719
0.674
0.640
0.614
0.594
4.0
4.621
2.997
2.128
1.770
1.569
1.439
1.348
1.280
1.229
1.188
6.0
6.931
4.496
3.192
2.656
2.353
2.158
2.022
1.921
1.843
1.781
8.0
9.242
5.995
4.256
3.541
3.138
2.878
2.695
2.561
2.457
2.375
10.0
11.552
7.494
5.320
4.426
3.922
3.597
3.369
3.201
3.072
2.969
IAC SHORT INVERSE
0.5
0.072
0.047
0.035
0.031
0.028
0.027
0.026
0.026
0.025
0.025
1.0
0.143
0.095
0.070
0.061
0.057
0.054
0.052
0.051
0.050
0.049
2.0
0.286
0.190
0.140
0.123
0.114
0.108
0.105
0.102
0.100
0.099
4.0
0.573
0.379
0.279
0.245
0.228
0.217
0.210
0.204
0.200
0.197
6.0
0.859
0.569
0.419
0.368
0.341
0.325
0.314
0.307
0.301
0.296
8.0
1.145
0.759
0.559
0.490
0.455
0.434
0.419
0.409
0.401
0.394
10.0
1.431
0.948
0.699
0.613
0.569
0.542
0.524
0.511
0.501
0.493
T
TDM
A
B
I I
pkp
⁄
(
)
C
–
------------------------------
D
I I
pkp
⁄
(
)
C
–
(
)
2
--------------------------------------
E
I I
pkp
⁄
(
)
C
–
(
)
3
--------------------------------------
+
+
+
×
=
T
RESET
TDM
t
r
1
I I
pkp
⁄
(
)
2
–
--------------------------------
×
=
Summary of Contents for B30 UR Series
Page 10: ...x B30 Bus Differential System GE Multilin TABLE OF CONTENTS ...
Page 122: ...4 30 B30 Bus Differential System GE Multilin 4 3 FACEPLATE INTERFACE 4 HUMAN INTERFACES 4 ...
Page 326: ...5 204 B30 Bus Differential System GE Multilin 5 10 TESTING 5 SETTINGS 5 ...
Page 412: ...A 12 B30 Bus Differential System GE Multilin A 1 PARAMETER LISTS APPENDIX A A ...
Page 554: ...D 10 B30 Bus Differential System GE Multilin D 1 IEC 60870 5 104 APPENDIX D D ...
Page 566: ...E 12 B30 Bus Differential System GE Multilin E 2 DNP POINT LISTS APPENDIX E E ...
Page 574: ...F 8 B30 Bus Differential System GE Multilin F 3 WARRANTY APPENDIX F F ...