Lenze E82EV302K4C User Manual

Thermal motor monitoring
10
Function library
10.14
10.14.1
L
10.14-2
EDS82EV903-1.0-11/2002
1. Calculate C0120. This value corresponds to a motor load of 100 % :
C
0
1
2
0
[
%
]
=
I
r
I
⋅
1
0
0
%
I
r
Rated motor current
C
0
1
2
0
[
%
]
=
I
N
⋅
1
0
0
%
I
r
Rated controller current at a chopper frequency of
8kHz
2. If you reduce C0120 based on the calculated value, the monitoring already
starts at a motor load of < 100 %.
3. If you increase C0120 based on the calculated value, the monitoring only
starts at a motor load > 100 %.
The controller switches off with fault OC6, if the apparent motor current is higher
than the rated motor current over a longer period of time.
60
180
240
300
360
t[s]
0.5
0
0
1.0
1.5 2.0
C0054
I
r
120
f=0Hz
f=20Hz
f>40Hz
I x 100 %
I
r
N
C0120 <
I x 100 %
I
r
N
C0120 =
I x 100 %
I
r
N
C0120 >
8200vec523
Fig. 10.14-1 Tripping characteristic of I
2
t monitoring
f Output frequency
tTimetotrip
I
r
Rated controller current at a chopper frequency of 8 kHz
I
r
Rated motor current
C0054 Apparent motor current
Example:
C0120 =
I
r
I
N
⋅ 100 %
C0054 = 1.5 x rated motor current
The controller switches off at output frequencies f > 40 Hz after
approx. 60 s with fault OC6.
Adjustment
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Lenze E82EV302K4C Specifications

General

Brand	Lenze
Model	E82EV302K4C
Category	DC Drives
Language	English