Parameter List Edition 04/03 SINAMICS G110 - Automatyka Siemens

Parameters 04/03
P0610 Motor I2t temperature reaction Min: 0
CStat: CT Datatype: U16 Unit: - Def: 2
P-Group: MOTOR Active: first confirm QuickComm.: No Max: 2
Level
3
Defines reaction when motor I2t reaches warning threshold.
Possible Settings:
0 No reaction, warning only
1 Warning and Imax reduction (results in reduced output frequency)
2 Warning and trip (F0011)
Dependency:
Trip level = 110% * P0614 (P0614 = motor I2t overload warning level; see actual value in r0034)
Note:
The purpose of motor I²t is to calculate or measure the motor temperature and disable the inverter if the
motor is in danger of overheating.
The motor temperature will be dependent on many factors, including the size of the motor, the ambient
temperature, the previous history of the loading of the motor, and of course, the load current. (The square of
the current actually determines the heating of the motor and the temperature rises with time - hence I²t).
Because most motors are cooled by built in fans running at motor speed, the speed of the motor is also
important. Clearly a motor running at high current (maybe due to boost) and a low speed, will overheat more
quickly than one running at 50 or 60 Hz, full load. The inverter takes account of these factors.
The drives also include inverter I²t protection (i.e. overheating protection, see P0290) in order to protect the
units themselves. This operates independently of the motor I²t, and is not described here.
I²t operation:
The measured motor current (r0027) is compared with the rated motor current (P0305), and other motor
parameters (P0304, P0307, etc.). The temperature of the motor is then calculated. The calculation also
includes the output frequency (motor speed) to account for fan cooling. If parameter P0335 is changed to
indicate a forced cooled motor, the calculation is modified accordingly.
For the I2t calculation the I2t motor time constant must be adjusted using P0611.
The resulting temperature is displayed in r0034 as % of maximum temperature. When r0034 reaches the
value set in P0614 (default 110%), a warning A0511 occurs. If no action is taken and the temperature
reaches 110% of P0614, then the inverter trips, showing F0011. The reaction to the warning can be
changed from this default using P0610; for example, the drive can react as though a current limit has
occurred, or a fault forced immediately. The warning level of P0614 can also be adjusted to raise and lower
the warning or trip level as required.
The reaction to the warning can be changed from this default using P0610. Parameter r0034 is particularly
useful to monitor if the calculated motor temperature is rising excessively.
Parameter List SINAMICS G110
28 6SL3298-0BA11-0BP0