GE MiCOM P40 Agile Technical Manual page 119

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P14x
The constant values for the IEEE curves are as follows:
Curve Description
IEEE Moderately Inverse Operate
IEEE Moderately Inverse Reset
IEEE Very Inverse Operate
IEEE Very Inverse Reset
IEEE Extremely Inverse Operate
IEEE Extremely Inverse Reset
CO8 US Inverse Operate
CO8 US Inverse Reset
CO2 US Short Time Inverse Operate
CO2 US Short Time Inverse Reset
The constant values for the ANSI curves are as follows:
Curve Description
ANSI Normally Inverse Operate
ANSI Normally Inverse Reset
ANSI Short Time Inverse Operate
ANSI Short Time Inverse Reset
ANSI Long Time Inverse Operate
ANSI Long Time Inverse Reset
Note:
* When using UK Long Time Inverse, BPN, UK Rectifier, or FR Short Time Inverse for the Operate characteristic, DT is always
used for the Reset characteristic.
P14xEd1-TM-EN-1
b constant
0.0515
0.02
4.85
2
19.61
2
21.6
2
28.2
2
29.1
2
5.95
2
5.95
2
0.16758
0.02
2.261
2
b constant
8.9341
2.0938
9
2
0.03393
1.2969
0.5
2
2.18592
1
15.75
2
Chapter 6 - Current Protection Functions
a constant
L constant
0.114
0
0.491
0
0.1217
0
0.18
0
0.11858
0
a constant
L constant
0.17966
0
0.2663
0
5.6143
0
93

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