Siemens Argus 7SR21 Technical Manual page 350

7SR21 & 7SR22 Performance Specification
1000
100
Time
(sec)
10
1
0.1
1
Unrestricted Page 38 of 68
2 3 4 5 6
Current (multiples of setting)
Figure 2-2 IEC IDMTL Curves (Time Multiplier = 1)
8 20
10
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Long Time Inverse
Normal Inverse
Very Inverse
Extremely Inverse
30 40 50 60 80
100