Siemens 7SR18 Solkor Manual page 145

Reyrolle protection devices, energy management, line differential relay
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7SR18 Performance Specification
1000
100
Time
(sec)
10
1
0.1
2
1
Unrestricted Page 28 of 44
3
4
5
6
8
10
Current (multiples of setting)
Figure 2.7.3-1 IEC IDMTL Curves (Time Multiplier = 1)
Long Time Inverse
Normal Inverse
Very Inverse
Extremely Inverse
20
30
40
50 60
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80
100

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