Lenze 8200 vector Instructions De Montage page 111

Adjustment
1. Calculate C0120. This value corresponds to a motor utilisation of 100 %:
C0120 [%] +
2. If you decrease C0120 on the basis of the value calculated, the monitoring already
responds at a motor utilisation < 100 %.
3. If you increase C0120 on the basis of the value calculated, the monitoring only
responds at a motor utilisation > 100 %.
The controller switches off with error OC6 if the apparent motor current is greater than the
rated motor current for a longer time.
C0120 <
t [s]
360
300
240
180
120
60
0
0
EDK82EV903 DE/EN/FR 5.1
I
I Rated motor current
r
r
@ 100 %
I
N
I Rated controller current at switching frequency 8 kHz
r
I x 100 % I x 100 %
r r
C0120 =
I I
N N
f = 20 Hz
f = 0 Hz f > 40 Hz
0.5 1.0
f Output frequency
t Release time
I Rated controller current at switching frequency 8 kHz
N
I Rated motor current
r
C0054 Apparent motor current
I
Example:
r
C0120 +
I
N
C0054 = 1.5 x rated motor current
The controller switches off at output frequencies f > 40 Hz with error OC6 after
approx. 60 s.
l
Safety instructions
Thermal motor monitoring
I x 100 %
r
C0120 >
I
N
1.5 2.0
@ 100 %
C0054
I
r
8200vec523
2
111