WEG SCA06 User Manual - page 89
8
Optional Items and Accessories
SCA06 | 8-29
Voltage
SCA06
: Rated voltage of the SCA06.
When one autotransformer supplies several servo drives, the autotransformer must be dimensioned by adding the
powers calculated for each SCA06, and, depending on the cycle type, you can apply a use factor, whose minimum
value is 0.7 for distinct cycles and maximum value is 1 for shafts in synchronism (equal cycles).
P
Total
= (P
transf1
+ P
transf2
+ P
transfn
) · uf
WEG offers several models of autotransformers, as you can see below.
In case an autotransformer of other suppliers is used, note that it must not cause a voltage drop greater than 3 %,
since that would increase the supply variation margin (-15 % to +10 %).
General Data:
Type:
Dry three-phase autotransformer
Output power:
As per
Figure 8.20 on page 8-30
to
Figure 8.23 on page 8-33
Efficiency:
95 %
Supply voltages:
220 / 380 / 440 V
Internal connection:
Star with accessible neutral
Protection degree:
IP00, without protection Box
Insulation class:
0.6 kV
Insulation voltage (dielectric):
4 kV
Temperature class:
B 130 °C (266 ºF)
Temperature rise:
B 80 °C (176 ºF)
Operating frequency:
50 / 60 Hz