Lenze I95AE240F User Manual

13.9 Motor protecon
Many monitoring funcons integrated in the inverter can detect errors and thus protect the
de
vice or motor from being destroyed or overloaded.
13.9.1 Motor overload monitoring (i²*t)
This funcon monitors the thermal ulisaon of the motor, taking the motor currents recor-
ded and a mathemacal model as a basis.
DANGER!
Fire hazard by overheang of the motor.
P
ossible consequences: Death or severe injuries
▶
Since the motor ulisaon calculated in the thermal model gets lost aer mains switching,
the following operang states cannot be determined correctly: 1.) Restarng (aer mains
switching) of a motor that is already very hot and 2.) Change of the cooling condions (e.g.
cooling air ow interrupted or too warm).
▶
To achieve full motor protecon, an addional temperature monitoring funcon with a sep-
arate evaluaon must be installed.
▶
When actuang motors that are equipped with PTC thermistors or thermal contacts, always
acvate the PTC input.
Motor overload monitoring is important for motors without thermal sensor.
Details
During the calculaon of the parameters 0x2D4D:001 ...0x2D4D:008, the speed dependence
of the permissible mot
or load and thus of the permissible current (dierence between the
standsll current and rated current is taken into consideraon.
In case of permanent overload and excess of the warning threshold set in parameter 0x2D4E,
a warning is output in order that the higher-level Controller is sll able to respond and reduce
the motor load or interrupt the operaon.
The calculated thermal motor ulisaon is displayed in parameter .
Parameter
Address Name / seng range / [default seng] Info
0x2D4F Motor ulisaon (i²*t)
•
R
ead only: x %
Display of the current thermal motor ulisaon.
0x2D4E Motor ulisaon (i²xt) - warning threshold
0 ... [100] ... 250 %
Seng of the warning threshold for motor overload monitoring.
0x2D50:001 Motor ulisaon (i²xt) - monitoring: Error response For displaying the motor ulisaon error response (I²xt).
Associated error code:
•
9041 | 0x2351 - RANLI_CIMES_1000_20892
0 Keine Reakon
1 Fehler > CiA402
Conguring the motor control
Mot
or protecon
Motor overload monitoring (i²*t)
264

Lenze I95AE240F Specifications

General

Brand	Lenze
Model	I95AE240F
Category	Inverter
Language	English