13.2 IEC trip curves
Time [s]
10000
5000
1000
1000
500
170
100
100
50
10
10
5
1
0.0
0.5
Fig. 21
IEC trip curves
Example
•
Set MP 204 to IEC trip class 20.
•
Set the overload limit to 10 A. The rated motor
current is stated on the nameplate.
At a motor current of 22.5 A (10 x 2.25), MP 204 trips
after approximately 170 seconds.
Class "p"
2.25 x rated current
1.0
1.5
2.0
2.5
3.0
3.5
Rated current
4.0
4.5
5.0
5.5
6.0
6.5
x rated current
MP 204
Class 45
Class 30
Class 20
Class 10
Class 5
7.0
7.5
8.0
8.5
9.0
23