Safety instructions
Thermal motor monitoring
Self−ventilated motors
2
80
EDKCSEX064 DE/EN/FR 6.0
2.2.2 Self−ventilated motors
Due to the construction, self−ventilated standard motors are exposed to an
increased heat generation in the lower speed range compared to forced
ventilated motors.
Warnings!
For complying with the UL 508C standard, you have to set the
speed−dependent evaluation of the permissible torque via code
C0129/x.
Parameter setting
The following codes can be set for I
2
x t monitoring:
Code Meaning Value range Lenze setting
C0066 Display of the I
2
x t load of the motor 0 ... 250 % −
C0120 Threshold: Triggering of error "OC6" 0 ... 120 % 0 %
C0127 Threshold: Triggering of error "OC8" 0 ... 120 % 0 %
C0128 Thermal motor time constant 0.1 ... 50.0 min 5.0 min
C0606 Response to error "OC8" TRIP, warning, off Warning
C0129/1 S1 torque characteristic I
1
/I
rated
10 ... 200 % 100 %
C0129/2 S1 torque characteristics n
2
/n
rated
10 ... 200 % 40 %