ORION ITALIA IPR-D, Instruction Manual

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Appendix A
CURRENT PROTECTION RELAY - IPR-D Manual P/N: IPR-D GBM 01/09/2006
A.1
APPENDIX A
TABLES AND TIME-CURRENT CURVES
This appendix includes the 3 curve types and their related shapes.
ANSI CURVES
Moderately inverse
Normally inverse
Very inverse
Extremely inverse
IAC CURVES
IAC Short time
IAC Normally inverse
IAC Very inverse
IAC Extremely inverse
IEC/BS 142 CURVES
IEC Short time
IEC A Normally inverse
IEC B Very inverse
IEC C Extremely inverse