Siemens 7SR12 Argus - Page 138

7SR11 & 7SR12 Performance Specification
©2017 Siemens Protection Devices Limited Chapter 3 Page 26 of 56
0.1
1
10
100
1000
10000
100000
0 1 2 3 4 5 6 7 8 9 10
Current (multiple of setting)
Time
(sec)
τ = 1000 mins
τ = 100 mins
τ
= 10 mins
τ = 1 min
Figure 2.7-1 Thermal Overload Protection Curves