Lenze I51AE175B User Manual

8.7.3 Overcurrent monitoring
This funcon monitors the instantaneous value of the motor current and serves as motor pro-
tecon.
NOTICE
With an incorrect parameterisaon, the maximum permissible motor current may be excee-
ded in the process.
Possible consequence: irreversible damage of the motor.
▶
The seng of the threshold for the overcurrent monitoring in 0x2D46:001 (P353.01) must
be adapted to the connected motor.
▶
Set the maximum output current of the inverter in 0x6073 (P324.00) much lower than the
threshold for overcurrent monitoring.
Details
The inverter monitors its output current. This monitoring takes place irrespecve of the set-
tings for the current liming funcon. 4Current limits ^ 166
•
If the instantaneous value of the motor current exceeds the threshold set in 0x2D46:001
(P353.01), the response set in 0x2D46:002 (P353.02) takes place.
•
With the seng 0x2D46:002 (P353.02) = "No response [0]", the monitoring funcon is
deacvated.
The threshold for the overcurrent monitoring is preset to four mes the rated motor current.
This preseng is overwrien in case a motor in the engineering tool is selected from the
"motor catalog" or the automac idencaon or calibraon of the motor data is carried out.
For a suitable protecon, the automacally adapted seng should be used. If disturbances
occur during operaon, the value can be increased.
Parameter Name / value range / [default seng] Info
0x2D46:001
(P353.01)
Overcurrent monitoring: Threshold
(Overcurr. monit.: Threshold)
0.0 ... [6.8]* ... 1000.0 A
* Default seng depending on the size.
•
From version 02.00
Warning/error threshold for motor current monitoring.
•
If the instantaneous value of the motor current exceeds the threshold
set, the response set in 0x2D46:002 (P353.02) is eected for the pur-
pose of motor protecon.
•
The parameter is calculated and set in the course of the automac
idencaon of the motor.
•
The parameter can also be set and thus overwrien by selecng a
motor in the engineering tool from the "motor catalog" or calibrang
the motor.
4Opmisaon of the control loops ^ 140
0x2D46:002
(P353.02)
Overcurrent monitoring: Response
(Overcurr. monit.: Response)
•
For further possible sengs, see parameter
0x2D45:001 (P310.01). ^ 169
Selecon of the response to the triggering of motor current monitoring.
Associated error code:
•
29056 | 0x7180 - Motor overcurrent
3 Fault
Motor control
Motor protecon
Overcurrent monitoring
168

Lenze I51AE175B Specifications

General

Brand	Lenze
Model	I51AE175B
Category	Inverter
Language	English