CHINT NR2-25 - Page 7

05
Figure 1 Thermal relay operation time – current characteristic curve
S
1
2
4
6
8
10
20
40
1
2
4
6
8
10
20
40
60
80
100
120
0.8 1 1.2 1.5 2 3 4 5 6 7 8 9 10
min
heat state
3 phase
2 phase
cold state
2 phase
3 phase
Amplification factor of setting current