Lenze ECSDAxxx - Manual (Page 86)

Safety instructions
Thermal motor monitoring
Self−ventilated motors
2
l
86 EDKCSDX064 DE/EN/FR 3.0
Effect of code C0129/x
0
0.9
0 0.1
C0129/2
0.2 0.3 0.4
0.6
0.7
0.8
1.0
1.1 1
0
0.132
2
I / IN
n / nN
C0129/1
3
9300STD350
Fig. 2−2 Working point in the range of characteristic lowering
The lowered speed / torque characteristic (Fig. 2−2) reduces the permissible
thermal load of self−ventilated standard motors. The characteristic is a line the
definition of which requires two points:
ƒ Point 0: Definition with C0129/1
This value also enables an increase of the maximally permissible load.
ƒ Point 1: Definition with C0129/2
With increasing speeds, the maximally permissible load remains
unchanged (I
Mot
= I
rated
).
In Fig. 2−2, the motor speed and the corresponding permissible motor torque ( 3)
can be read for each working point ( 2on the characteristic (0) ... 1). 3 can also
be calculated using the values in C0129/1and C0129/2 (evaluation
coefficient "y",
¶ 87).