Lenze ECSEM Series - Page 79

Safety instructions
Thermal motor monitoring
Forced ventilated or naturally ventilated motors
2

79
EDKCSEX064 DE/EN/FR 6.0
Read release time in the diagram
Diagram for detecting the release times for a motor with a thermal motor time
constant of 5 minutes (Lenze setting C0128):
I = 3 × I
Mot N
0
50
100
120
0 100 200 300 400 500 600 700 8
0
L [%]
I = 2 × I
Mot N
I = 1.5 × I
Mot N
I = 1 × I
Mot N
9300STD105
Fig. 2−1 I
2
× t−monitoring: Release times for different motor currents and trigger thresholds
I
Mot
Actual motor current (C0054)
I
r
Rated motor current (C0088)
LI
2
x t load of the motor (display: C0066)
T Time