Iec And Ieee Inverse Curves; Figure 30: Iec Standard And Very Inverse Curves; Figure 31: Iec Extremely Inverse And Ieee Moderate Inverse Curves - GE MiCOM P40 Agile Technical Manual

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Chapter 6 - Current Protection Functions
2.1.4

IEC AND IEEE INVERSE CURVES

IEC Standard Inverse Curve
1000
100
10
1
0.1
0.01
0.5
5
Current in Multiples of Setting
E00757

Figure 30: IEC standard and very inverse curves

IEC Extremely Inverse Curve
1000
100
10
1
0.1
0.01
0.5
5
Current in Multiples of Setting
E00758

Figure 31: IEC Extremely inverse and IEEE moderate inverse curves

94
1000
100
TMS
0.025
0.075
10
0.100
0.300
1
0.500
0.700
0.900
0.1
1.000
1.200
0.01
50
0.5
1000
TMS
TMS
100
0.025
0.075
10
0.100
0.300
0.500
1
0.700
0.900
0.1
1.000
1.200
0.01
0.5
50
IEC Very Inverse Curve
5
Current in Multiples of Setting
IEEE Moderate Inverse Curve
5
Current in Multiples of Setting
P14xEd1-TM-EN-1
P14x
TMS
TMS
0.025
0.075
0.100
0.300
0.500
0.700
0.900
1.000
1.200
50
0.05
0.5
1
5
10
30
50
70
100
50

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