APPENDIX A
• TIME OVERCURRENT
CHARACTERISTIC CURVES
TABLE OF CONTENTS
APPENDIX A
• TIME OVERCURRENT CHARACTERISTIC CURVES ................................................... A-1
GENERAL .............................................................................................................................................. A-1
CURVE SPECIFICATIONS ................................................................................................................... A-1
TIME OVERCURRENT CHARACTERISTIC CURVE GRAPHS ........................................................... A-2
THE 46 CURVE ..................................................................................................................................... A-4
Figures
Figure A-1. Time Characteristic Curve S, S1, Short Inverse (Similar to ABB CO-2) ................................ A-6
Figure A-2. Time Characteristic Curve S2, Short Inverse (Similar To GE IAC-55) ................................... A-7
Figure A-3. Time Characteristic Curve L, L1, Long Inverse (Similar to ABB CO-5) .................................. A-8
Figure A-4. Time Characteristic Curve L2, Long Inverse (Similar To GE IAC-66) .................................... A-9
Figure A-5. Time Characteristic Curve D, Definite Time (Similar To ABB CO-6) ................................... A-10
Figure A-6. Time Characteristic Curve M, Moderately Inverse (Similar to ABB CO-7) ........................... A-11
Figure A-7. Time Characteristic Curve I, I1, Inverse Time (Similar to ABB CO-8) .................................. A-12
Figure A-8. Time Characteristic Curve I2, Inverse Time (Similar to GE IAC-51) .................................... A-13
Figure A-9. Time Characteristic Curve V, V1, Very Inverse (Similar to ABB CO-9) ............................... A-14
Figure A-10. Time Characteristic Curve V2, Very Inverse (Similar to GE IAC-53) ................................. A-15
Figure A-11. Time Characteristic Curve E, E1, Extremely Inverse, (Similar to ABB CO-11) .................. A-16
Figure A-12. Time Characteristic Curve E2, Extremely Inverse (Similar to GE IAC-77) ......................... A-17
Figure A-13. Time Characteristic Curve A, Standard Inverse ................................................................. A-18
Figure A-14. Time Characteristic Curve B, Very Inverse ........................................................................ A-19
Figure A-15. Time Characteristic Curve C, Extremely Inverse ............................................................... A-20
Figure A-16. Time Characteristic Curve G, Long Time Inverse .............................................................. A-21
Figure A-17. 46 Time Characteristic Curve ............................................................................................. A-22
Tables
Table A-1. 51P, 51N, and 51Q Time Characteristic Curve Constants ...................................................... A-2
Table A-2. Characteristic Curve Cross-Reference .................................................................................... A-3
Table A-3. Time Dial Setting Cross-Reference ......................................................................................... A-4
9376700990 Rev M
BE1-700 Time Overcurrent Characteristic Curves
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