Eaton M-Max Series Operating Instructions Manual page 100

Parameters
PNU ID Access right
RUN
P8.4 709 -
P8.5 713 -
P8.6 704 -
P8.7 705 -
P8.8 706 -
P8.9 707 -
96
Value Description
Blocking protection mechanism
The blocking protection is functions as an overload protection.
It protects the motor from brief overloads (e. g. blocked motor
shaft) and is set via parameter P7.2.
Note: With long motor cable lengths and low motor power (poor
efficiency cos v), a higher (capacitive) motor current can flow
causing early tripping. Solution: Motor reactor or sinus filter.
0 Deactivated
1 Warning (AL 15)
2 Error (F... 15), stop function according to P6.8.
Underload protection
The underload protection monitors the load of the connected
motor in the range of 5 Hz up to the maximum output frequency.
This requires that the output current of the frequency inverter be
monitored. A message will be generated if the values set in P8.12
and P8.13 are undershot within 20 seconds.
0 Deactivated
1 Warning (AL 17)
2 Error (F...17), stop function according to P6.8
Motor, temperature protection
The motor temperature protection is designed to protect the motor
from overheating. It is based on a temperature algorithm and uses
the motor current (P7.1) to determine the motor load (see
figure 87, page 97).
0 Deactivated
1 Warning (AL 16)
2 Error (F... 16), stop function according to P6.8.
Motor, ambient temperature
Setting range: -20 – +100 °C
Cooling factor at zero frequency
Setting range: 0.0 – 150 %
The cooling factor of the motor with a zero frequency defines the
relationship to the cooling of the motor at the rated frequency with
the rated operational current without an external fan (see
figure 86, page 97).
Motor, thermal time constant
Setting range: 1 – 200 min
The temperature time constant determines the time-span in which
the heat calculation model achieves 63% of its end value. It
depends on the design of the motor and is different from
manufacturer to manufacturer. The larger the motor design, the
greater the time constant.
04/10 MN04020001Z-EN
Factory setting
(P1.3)
1
0
2
40
40.0
45