Table of Contents
Advertisement
S3 PROTECTION
NOTE:
NOTE
6–36
Multiplier (TDM)
1.5
2.0
0.5
0.072
0.047
1.0
0.143
0.095
2.0
0.286
0.190
4.0
0.573
0.379
6.0
0.859
0.569
8.0
1.145
0.759
10.0
1.431
0.948
USER Curves
The relay provides a selection of user definable curve shapes used by the time overcurrent
protection. The User curve is programmed by selecting the proper parameters in the
formula:
A, P, Q, B, K - selectable curve parameters within the ranges from the table: D is the Time
Dial Multiplier.
User Curve can be used on multiple elements only if the time dial multiplier is the same for
each element.
V = I/I
(TOC setting) is the ratio between the measured current and the pickup setting.
PICKUP
The maximum trip time for the User Curve is limited to 65.535 seconds. The User Curve can
be used for one protection situation only.
Parameters
A
Range
0 to 125
Step
0.0001
Unit
sec
Default Value
0.05
3.0
4.0
5.0
6.0
0.035
0.031
0.028
0.027
0.070
0.061
0.057
0.054
0.140
0.123
0.114
0.108
0.279
0.245
0.228
0.217
0.419
0.368
0.341
0.325
0.559
0.490
0.455
0.434
0.699
0.613
0.569
0.542
B
P
0 to 3
0 to 3
0.0001
0.0001
sec
NA
0
0.04
350 FEEDER PROTECTION SYSTEM – INSTRUCTION MANUAL
CHAPTER 6: SETPOINTS
7.0
8.0
9.0
10.0
0.026
0.026
0.025
0.025
0.052
0.051
0.050
0.049
0.105
0.102
0.100
0.099
0.210
0.204
0.200
0.197
0.314
0.307
0.301
0.296
0.419
0.409
0.401
0.394
0.524
0.511
0.501
0.493
Q
K
0 to 2
0 to 1.999
0.0001
0.001
NA
sec
1.0
0
Advertisement
Table of Contents
