WEG CFW-11 User Manual - page 100
Technical Specifications
8
CFW-11 | 8-5
(2)
presents only two points of the overload curve (actuation time of 1 min and 3 s).
The complete overload curves of the IGBTs for ND and HD are presented below.
Depending on the inverter operating conditions (ambient temperature around the inverter, output frequency, possibility or not of switching
frequency derating, etc.), the maximum operating time of the inverter with overload may be shortened.
(3) The switching frequency may be automatically reduced to 2.5 kHz, depending on the operating conditions (ambient temperature around the
inverter, output current, etc.) - if P0350 = 0 or 1.
If necessary to operate always at 5 kHz, set P0350 = 2 or 3, and consider the rated current values of
. Note that, in this case, it is necessary to apply a current derating to the inverter rated output current.
(4) The motor outputs are only for guiding purposes for WEG motors of 230 V or 460 V with 4 poles. The proper sizing must be done according
to the rated current of the motors used.
(5) The specified losses are valid for the nominal operating conditions, that is, for the rated output current and switching frequency.
(6) The dissipated power for flange mounting corresponds to the total losses of the inverter minus the losses on the power modules (IGBT and rectifier).
(7) In order to indicate that the inverter should come with such optional item, it is necessary to specify it in the inverter smart code.
(8) Ambient temperature around the inverter: -10 to 40 ºC (14 °F to 104 °F). The inverter may operate in environments with ambient temperatures
around the inverter up to 55 °C (131 °F) if a derating of 2 % is applied to the output current for each °C above 40 °C (104 °F).
- Air relative humidity: 5 % to 90 % non-condensing.
- From 1000 m to 4000 m (3,300 ft to 13,200 ft) – apply current derating of 1 % for each 100 m above 1000 m of altitude.
- From 2000 m to 4000 m (6,600 ft to 13,200 ft) - apply maximum voltage derating (240 V for models 220...240 V, and 480 V for models 380...480
V) of 1.1 % for each 100 m (328 ft) above 2000 m (6,600 ft).
- Environment with pollution degree 2 (as per EN50178 and UL 508C).
(a) IGBTs overload curve for the Normal Duty (ND) cycle
(b) IGBTs overload curve for the Heavy Duty (HD) cycle
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 50 60 70 80 90 100 110 120
I
o
I
nom ND
∆ t (s)
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 50 60 70 80 90 100 110 120
I
o
I
nom HD
∆ t (s)
Attention!
One overload each 10
minutes.
Attention!
One overload each 10
minutes.
Figure 8.1 - (a) and (b) - IGBT overload curves for ND and HD use