Siemens ISGS SG8158-00 - Manual (Page 60)

Appendix A: Trip Curves & Equations
54 Siemens Energy & Automation, Inc.
Figure A.3 Short Inverse Curve (SEA2)
Figure A.4 Long Inverse Curve (SEA3)
0.01
0.1
1
10
100
1 10 50
0.1
0.5
1.5
3.0
5.0
7.0
9.9
Multiples of Pickup
T
ime to T
rip (Seconds)
T
ime Dial
0.1
1
10
100
1000
1 10 50
9.9
7.0
5.0
3.0
1.5
0.5
0.1
Multiples of Pickup
T
ime to T
rip (Seconds)
T
ime Dial
Figure A.5 Moderately Inverse Curve (SEA4)
Figure A.6 Very Inverse Curve (SEA5)
0.01
0.1
1
10
100
1 10 50
9.9
7.0
5.0
3.0
1.5
0.5
0.1
Multiples of Pickup
T
ime to T
rip (Seconds)
T
ime Dial
0.01
0.1
1
10
100
1000
1 10 50
9.9
7.0
5.0
3.0
1.5
0.5
0.1
Multiples of Pickup
T
ime to T
rip (Seconds)
T
ime Dial
A
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