Descriptions of functions
10.17 Thermal overload protection for the DC motor (I2t monitoring of the motor)
10.17
Thermal overload protection for the DC motor (I2t monitoring of the
motor)
I
t monitoring protects the motor against impermissible loads.
2
CAUTION
No full motor protection
I
t monitoring only provides an approximate representation of the motor's thermal image.
2
If the electronics power supply fails, then the calculated preload of the motor is lost. When
switching-on again, the system assumes an unloaded motor!
For p50114 = 0, the I
Adaptation
Table 10- 21 Parameter settings for I2t monitoring
Parameter
p50114
Thermal time constant
p50100
Rated armature current
p50113
Continuous-current factor
404
t monitoring is disabled.
2
Data
Time constant [s] with which I
Determination of permissible continuous current for motor:
Permissible continuous current = p50100 × p50113
t monitoring is to operate
2
SINAMICS DCM Control Module
Operating Instructions, 06.2010, C98130-A7067-A1-02-7619