GE 489 - Manual (Page 7)

GE Multilin 489 Generator Management Relay 5
TABLE OF CONTENTS
A. APPLICATION NOTES A.1 STATOR GROUND FAULT
A.1.1 Description .........................................................................................................A-1
A.1.2 Neutral Overvoltage Element .............................................................................A-1
A.1.3 Ground Overcurrent Element .............................................................................A-2
A.1.4 Ground Directional Element ...............................................................................A-3
A.1.5 Third Harmonic Voltage Element .......................................................................A-5
A.1.6 References.........................................................................................................A-5
A.2 CURRENT TRANSFORMERS
A.2.1 Ground Fault CTs for 50:0.025 A CT .................................................................A-6
A.2.2 Ground Fault CTs for 5 A Secondary CT ...........................................................A-7
A.2.3 Phase CTs .........................................................................................................A-8
B. CURVES B.1 TIME OVERCURRENT CURVES
B.1.1 ANSI Curves ......................................................................................................B-1
B.1.2 Definite Time Curves..........................................................................................B-5
B.1.3 IAC Curves.........................................................................................................B-6
B.1.4 IEC Curves.......................................................................................................B-10
C. MISCELLANEOUS C.1 REVISION HISTORY
C.1.1 Change Notes ....................................................................................................C-1
C.1.2 Changes Since Last Revision ............................................................................C-1
C.2 EU DECLARATION OF CONFORMITY
C.2.1 EU declaration of conformity .............................................................................C-2
C.3 WARRANTY INFORMATION
C.3.1 GE Multilin Warranty ..........................................................................................C-3