Siemens Argus 7SR21 - Page 351

7SR21 & 7SR22 Performance Specification
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0.1
1
10
100
1000
1 10 100
Current (multiples of setting)
Time
(sec)
2
3
4 5
6
8
20
30
40
50
60
80
Moderately Inverse
Extremely Inverse
Very Inverse
Figure 2-3 ANSI IDMTL Operate Curves (Time Multiplier = 1)