WEG CFW-11 User Manual page 106

I
o
I
nom ND
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0.9
0 10 20 30 40
(a) IGBTs overload curve for the Normal Duty (ND) cycle
I
o
I
nom HD
2.0
1.9
1.8
1.7
1.6
1.5
1.4
1.3
1.2
1.1
1.0
0 10 20 30 40
(b) IGBTs overload curve for the Heavy Duty (HD) cycle
Figure 8.1 - (a) and (b) - Overload curves for the IGBTs
NOTE!
Depending on the inverter usage conditions (surrounding air temperature, output frequency, possibility
or not of reducing the carrier frequency, etc.), the maximum time for operation of the inverter with
overload may be reduced.
50 60 70 80 90 100 110
50 60 70 80 90 100 110
Technical Specifications
Attention!
One overload each
10 minutes.
∆ t (s)
120
Attention!
One overload each
10 minutes.
∆ t (s)
120
CFW-11 | 8-5
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