Siemens 7SR18 Solkor Manual page 146

Reyrolle protection devices, energy management, line differential relay
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7SR18 Performance Specification
1000
100
Time
(sec)
10
Moderately Inverse
1
Very Inverse
Extremely Inverse
0.1
2
3
4
5
6
8
20
30
40
50 60
80
1
10
100
Current (multiples of setting)
Figure 2.7.3-2 ANSI IDMTL Operate Curves (Time Multiplier = 1)
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