Thermal Motor Monitoring - Lenze 8200 vector Montageanleitung

2 Safety instructions

Thermal motor monitoring

2.3 Thermal motor monitoring
Description
2
With the I
without sensors.
)
Note!
The I
ƒ
ƒ
ƒ
ƒ
Codes for parameter setting
Code Possible settings
No. Name Lenze
2
C0120 I t switch−off
116
t monitoring you can monitor self−ventilated three−phase AC motors thermally
2
xt function is UL−approved.
2
The I xt monitoring is based on a mathematical model which calculates a
thermal motor utilisation from the motor currents measured.
In UL−approved systems no additional protective measures for the motor are
required.
2
However, the I xt monitoring is no full motor protection, since other
influences on the motor utilisation cannot be detected, like changed cooling
conditions (e.g. cooling air flow interrupted or too warm).
You can only obtain full motor protection if the motor is equipped with a
PTC thermistor or a thermal contact.
Selection
0 0 {1 %}
= inactive
l
IMPORTANT
200 Reference: apparent motor current
(C0054)
Reference to active motor current
(C0056) possible, see C0310
EDK82EV903 DE/EN/FR 4.0