Siemens 7SR242 Duobias Technical Manual page 126
Transformer protection relay
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Also See for 7SR242 Duobias:
- Manual (52 pages) ,
- Commissioning and maintenance manual (57 pages)
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Chapter 3) 7SR242 Duobias 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 2-3
ANSI IDMTL Operate Curves (Time Multiplier=1)
©2015 Siemens Protection Devices Limited
Chapter 3 Page 38 of 50
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