GE N60 Instruction Manual page 417
Network stability and
synchrophasor
Hide thumbs
Also See for N60:
- Instruction manual (644 pages) ,
- Communications manual (532 pages) ,
- Instruction manual (614 pages)
Table of Contents
Advertisement
CHAPTER 5: SETTINGS
Multiplier
Current ( I / I
pickup
(TDM)
1.5
2.0
10.0
64.390
38.032
IEC curves
For European applications, the relay offers three standard curves defined in IEC 255-4 and British standard BS142. These
are defined as IEC Curve A, IEC Curve B, and IEC Curve C. The IEC curves are derived by the operate and reset time
equations.
where
T = operate time (in seconds)
TDM = Multiplier setting
I = input current
I
= Pickup Current setting
pickup
K, E = constants defined in the table
t
= characteristic constant defined in the table
r
T
= reset time in seconds (assuming energy capacity is 100% and
RESET
Table 5-32: IEC (BS) inverse time curve constants
IEC (BS) curve shape
IEC Curve A (BS142)
IEC Curve B (BS142)
IEC Curve C (BS142)
IEC Short Inverse
Table 5-33: IEC curve trip times (in seconds)
Multiplier
Current ( I / I
pickup
(TDM)
1.5
2.0
IEC Curve A
0.05
0.860
0.501
0.10
1.719
1.003
0.20
3.439
2.006
0.40
6.878
4.012
0.60
10.317
6.017
0.80
13.755
8.023
1.00
17.194
10.029
IEC Curve B
0.05
1.350
0.675
0.10
2.700
1.350
0.20
5.400
2.700
0.40
10.800
5.400
0.60
16.200
8.100
0.80
21.600
10.800
1.00
27.000
13.500
IEC Curve C
0.05
3.200
1.333
N60 NETWORK STABILITY AND SYNCHROPHASOR MEASUREMENT SYSTEM – INSTRUCTION MANUAL
)
3.0
4.0
5.0
24.322
19.458
16.883
K
E
t
r
0.140
0.020
9.7
13.500
1.000
43.2
80.000
2.000
58.2
0.050
0.040
0.500
)
3.0
4.0
5.0
0.315
0.249
0.214
0.630
0.498
0.428
1.260
0.996
0.856
2.521
1.992
1.712
3.781
2.988
2.568
5.042
3.984
3.424
6.302
4.980
4.280
0.338
0.225
0.169
0.675
0.450
0.338
1.350
0.900
0.675
2.700
1.800
1.350
4.050
2.700
2.025
5.400
3.600
2.700
6.750
4.500
3.375
0.500
0.267
0.167
6.0
7.0
8.0
15.255
14.117
13.267
is "Timed")
RESET
6.0
7.0
8.0
0.192
0.176
0.165
0.384
0.353
0.330
0.767
0.706
0.659
1.535
1.411
1.319
2.302
2.117
1.978
3.070
2.822
2.637
3.837
3.528
3.297
0.135
0.113
0.096
0.270
0.225
0.193
0.540
0.450
0.386
1.080
0.900
0.771
1.620
1.350
1.157
2.160
1.800
1.543
2.700
2.250
1.929
0.114
0.083
0.063
GROUPED ELEMENTS
9.0
10.0
12.604
12.068
Eq. 5-11
9.0
10.0
0.156
0.149
0.312
0.297
0.623
0.594
1.247
1.188
1.870
1.782
2.493
2.376
3.116
2.971
0.084
0.075
0.169
0.150
0.338
0.300
0.675
0.600
1.013
0.900
1.350
1.200
1.688
1.500
0.050
0.040
5-223
5
Advertisement
Table of Contents
