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NORDAC ON / ON+ (SK 3xxP) – Manual with installation instructions
8.2.2 Reduced overcurrent due to time
The possible overload capacity changes depending on the duration of an overload. Several values are
cited in this table. If one of these limiting values is reached, the frequency inverter must have sufficient
time (with low utilisation or without load) in order to regenerate itself.
If operated repeatedly in the overload region at short intervals, the limiting values stated in the tables
are reduced.
400V devices: Reduced overload capacity (approx.) due to pulse frequency (P504) and time
Time [s]
Pulse frequency
[kHz]
3...6
8
10
12
14
16
Table 6: Overcurrent relative to time
140
> 600
60
110 %
150 %
100 %
135 %
90 %
120 %
78 %
105 %
67 %
92 %
57 %
77 %
30
20
170 %
180 %
150 %
160 %
135 %
145 %
120 %
125 %
104 %
110 %
87 %
92 %
10
3.5
180 %
200 %
160 %
165 %
145 %
150 %
125 %
130 %
110 %
115 %
92 %
100 %
BU 0800 en-4521
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