Lust CDA3000 - 33 MO-Motor Protection

Application Manual CDA3000
5-55
5 Software functions
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A
DE
EN
FR
5.3.2 _33 MO-Motor
protection
Note: The resistance of the PTC has a value of > 3 kW (cf. DIN
41081 and DIN 44082) at the nominal response temperature.
PTC evaluation
Figure 5.19 PTC evaluation operation diagram
Function Effect
• Monitoring of motor tempera-
ture by temperature sensors
(PTC) or by temperature-
sensitive switches and Ixt
monitoring.
• Both functions are deacti-
vated in the factory setting.
The inverter module shuts off the
motor with an error message:
• E-OTM, if the motor temper-
ature exceeds a programma-
ble limit value.
• E-OLM if the up-integrated
current/time value exceeds
the required motor-depend-
ent limit value for a specific
release time.
This function replaces a
motor circuit-breaker.
• The inverter module can
deliver a warning message
when the Ixt motor protection
integrator starts.
0
1
T/˚C
max
E-OTM
t [s]