Thermal Motor Monitoring - Lenze 8200 vector Instructions De Montage

2 Safety instructions

Thermal motor monitoring

2.3 Thermal motor monitoring
Description
2
With the I
without sensors.
)
Note!
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J
Warnings!
If you use the I
monitoring:
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For devices from software version V3.9 (nameplate data: E82xV... xx 39), an
additional setting is required!
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Codes for parameter setting
Code Possible settings
No. Name Lenze
2
C0120 I t switch−off
C0311*
Functions for
v
special
applications 2
(from software
version 3.9)
110
t monitoring you can monitor self−ventilated three−phase AC motors thermally
2
The I xt monitoring is based on a mathematical model which calculates a
thermal motor utilisation from the motor currents measured.
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.
2
xt function in UL−approved systems for thermal motor
2
The I xt function is UL−approved.
In UL−approved systems no additional protective measures for the motor are
required.
Activate the starting value 50% for the I
– Add 128 to the value displayed in Code C0311.
Example:
– C0311 = 1 (Lenze setting)
– Setting for UL−approved systems: C0311 = 129
Selection
0 0 {1 %}
= inactive
1
0 All functions switched off
, System manual
1, 2, 4,
8, 16
1 128
Function active:
When the device is connected to the
mains, the thermal motor load is initialised
with 50 %.
The function has to be activated for
operation in UL−approved systems.
l
2
xt function:
IMPORTANT
200 Reference: apparent motor current
(C0054)
Reference to active motor current
(C0056) possible, see C0310
A combination of functions can be
activated by entering the sum of the
selection values.
2
Motor overload (I xt) tart value
Function switched−off:
When the device is connected to the
mains, the thermal motor load is
initialised with 0 % ("cold engine")
EDK82EV903 DE/EN/FR 5.1