Iec Trip Curves - Grundfos MP 204 Montage- Und Betriebsanleitung

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