Configuration Mode (ConF)
Motor thermal protection
Function
Therm al protection by calculating the I²t.
Note:
The m otor therm al state is not saved when the drive is switched off.
•
Self-cooled m otors : The tripping curves depend on the m otor frequency.
•
Force-cooled m otors : Only the 50 Hz tripping curve needs to be considered, regardless of the m otor
frequency.
The following curves repres ent the triggering tim e in s econds :
Triggering time in seconds
10 , 000
1, 00 0
1 Hz 3 Hz 5 Hz
10 Hz
20 Hz
50 Hz
10 0
0.7 0.8 0.9 1 1.1 1 .2 1.3 1.4 1.5 1.6
Motor current / ItH
Parameters described in this page can be accessed by:
DRI- > CONF > FULL > FLT- > THT-
CAUTION
RISK OF DAMAGE TO THE MOTOR
External protection against overloads is required under the following circumstances:
When the product is being switched on again, as there is no memory to record the motor thermal state
When supplying more than one motor
When supplying motors with ratings less than 0.2 times the nominal drive current
When using motor switching
Failure to follow these instructions can result in equipment damage.
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