Safety instructions
Thermal motor monitoring
Self−ventilated motors
2
81
EDKCSEX064 DE/EN/FR 6.0
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 / I
N
n / n
N
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 : Definition with C0129/1
This value also enables an increase of the maximally permissible load.
ƒ Point : 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 ()
can be read for each working point (on the characteristic () ... ). can also
be calculated using the values in C0129/1and C0129/2 (evaluation
coefficient "y", 82)
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