5-36
G650 Generator Protection & Control System
GEK-113285A
5.4 PROTECTION ELEMENTS
5 SETTINGS
5
5.4.2.4 ANSI CURVES
This family of curves complies with the American Standard ANSI C37.90 for Extremely inverse, Very inverse, Normally
inverse and Moderately inverse curves. The formulas that define these curves are as follows:
where:
T = Operation time (in seconds).
Dial = Multiplying factor
I = Input current
I
pickup
= Current pickup setting
A, B, C, D, E = Constants
T
reset
= Reset time (in seconds) assuming a 100% of power capacity and that the reset is activated
T
r
= Characteristic constant
The different constants that define the above-mentioned curves are:
Table 5–35: CONSTANTS FOR ANSI CURVES
ANSI CURVE SHAPE
A
B
C
D
E
TR
ANSI Extremely Inverse
0.0399
0.2294
0.5
3.0094
0.7222
5.67
ANSI Very Inverse
0.0615
0.7989
0.34
-0.284
4.0505
3.88
ANSI Normally Inverse
0.0274
2.2614
0.3
-4.1899
9.1272
5.95
ANSI Moderately Inverse
0.1735
0.6791
0.8
-0.08
0.1271
1.08
Содержание Multilin G650
Страница 9: ...8 G650 Generator Protection Control System GEK 113285A TABLE OF CONTENTS ...
Страница 29: ...1 20 G650 Generator Protection Control System GEK 113285A 1 4 650 HARDWARE 1 GETTING STARTED 1 ...
Страница 293: ...5 150 G650 Generator Protection Control System GEK 113285A 5 9 LOGIC CONFIGURATION PLC EDITOR 5 SETTINGS 5 ...
Страница 391: ...11 6 G650 Generator Protection Control System GEK 113285A 11 4 RELAY CONFIGURATION 11 FREQUENTLY ASKED QUESTIONS 11 ...
Страница 426: ...GEK 113285A G650 Generator Protection Control System A 31 APPENDIX A A 1 LOGIC OPERANDS A ...
Страница 427: ...A 32 G650 Generator Protection Control System GEK 113285A A 1 LOGIC OPERANDS APPENDIXA A ...
Страница 587: ...C 22 G650 Generator Protection Control System GEK 113285A C 8 ANALOG INPUTS APPENDIXC C ...
Страница 595: ...D 8 G650 Generator Protection Control System GEK 113285A D 5 IEC 60870 5 104 POINT LIST APPENDIXD D ...
Страница 606: ...GEK 113285A G650 Generator Protection Control System E 11 APPENDIX E E 1 FACTORY DEFAULT LOGIC E ...
Страница 607: ...E 12 G650 Generator Protection Control System GEK 113285A E 1 FACTORY DEFAULT LOGIC APPENDIXE E ...
Страница 639: ...G 2 G650 Generator Protection Control System GEK 113285A G 1 GE MULTILIN WARRANTY APPENDIXG G ...