Siemens ISGS - 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
11050
0.1
0.5
1.5
3.0
5.0
7.0
9.9
Multiples of Pickup
Time to Trip (Seconds)
Time Dial
0.1
1
10
100
1000
11050
9.9
7.0
5.0
3.0
1.5
0.5
0.1
Multiples of Pickup
Time to Trip (Seconds)
Time Dial
Figure A.5 Moderately Inverse Curve (SEA4)
Figure A.6 Very Inverse Curve (SEA5)
0.01
0.1
1
10
100
11050
9.9
7.0
5.0
3.0
1.5
0.5
0.1
Multiples of Pickup
Time to Trip (Seconds)
Time Dial
0.01
0.1
1
10
100
1000
11050
9.9
7.0
5.0
3.0
1.5
0.5
0.1
Multiples of Pickup
Time to Trip (Seconds)
Time Dial
A
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