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Description of the Software Modules and Parameters
I '
Motor
act
6.28
6.30
246 %
100 %
( 8 A)
100 %
80 %
6.39
Motor warning
Warnung no. 34
Motor error
error no. 99
Figure 229:
NOTE!
If you have to consider UL 508 C:
If motor temperature is not monitored by a motor temperature sensor, motor overload
monitoring is to be activated. Among other things nominal current
constant
4.11.5.2 Speed variable l
The preset standard solution referring to the constant maximum continuous current
throughout the total speed range is inadequate to many applications with synchronous
and asynchronous machines. Therefore, in the following implementation solutions are in-
troduced considering the speed-dependence of the maximum continuous current of the
2
l
t motor model.
Speed variable I2t overload monitoring of synchronous machines
I2t actual value
(
I
6.30
Motor I2t time constant (107.28) = 600 s
0
Function example of the motor l
Z107.28–
of the motor have to be specified correctly.
2
t overload monitoring
2
2
I
8 A
'
(
Limit
)
'
*
I
=
*
act
act
5,1 A
I
N
Motor I2t actual value
(theoretically: w/o error shut-down)
Motor I2t actual value:
After error shut-down
from drive manager
As long as error is acknowledged in controlword 108.1
2
t overload monitoring
Parameter manual b maXX BM3000
Document no.: 5.12001.07
2
2
'
)
I
2,46
=
*
act
Z107.9–
and time
4
t
t
t
735
of 820
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