WEG CFW-09 - Page 341

342
CHAPTER9 -
TECHNICAL
SPECIFICA
TIONS
(4)
Maximum Current: 1.5 x I Nominal (for 60 seconds every 10 minutes).
I Nominal = Rated Current for CT applications considering the applicable
derating(depending on altitude or ambient temperature as specified in
note (3)).
The maximum output current is the same for CT and VT. This way the
inverter has a lower overload capacity when VT current is used.
(5)
The indicated maximum motor hp/kW ratings are based on WEG 230 V/
460
V/575 V 4 pole motors and normal duty loads. A precise inverter sizing
must consider the actual motor nameplate and application data.
(6)
Rated input current for single-phase operation.
Note:
The 6A, 7Aand 10A / 220-230 V models can be operated with 2 input
phases only(single-phase operation) without output current derating.
(7)
Rated input current for three-phase operation:
This is a conservative value. In practice the value of this current depends on
the line impedance. Please refer to table 9.2:
X (%)
0.5
1.0
2.0
3.0
4.0
5.0
I
input (rms)
(%)
131
121
106
99
96
96
Table 9.2
- X = Line impedance drop @ rated inverter output current;
I
input (rms)
= % of the rated output current
Models
6 A to 45 A / 220-230 V
54 A to 130 A/220-230 V
3.6 A to 24 A / 380-480 V
30 A to 142 A / 380-480 V
180 A to 600 A / 380-480 V
63 A / 500-600 V
79 A / 500-600 V
107 A to 472 A / 500-690 V
100 A to 428 A / 660-690 V
Switching
Frequency
10 kHz
5 kHz
10 kHz
10 kHz
5 kHz
10 kHz
5 kHz
10 kHz
5 kHz
Output Current
Derating - %
0.8
Contact WEG
0.7
Contact WEG
0.8
Contact WEG
Load
Type
CT/VT
CT
VT
CT/VT
CT
VT
CT/VT
VT
CT
VT
CT
VT
CT
VT
(8)
Loss considering rated work conditions (rated output current and rated
switching frequency).
Table 9.1 -
Output current derating for switching frequency

rated switching frequency