User`s guide

172
CHAPTER 8 - CFW-08 OPTIONS AND ACCESSORIES
Table 8.5
- Recommended braking resistors
8.23.2
Installation
Con
nect the braking resistor between the
+UD
and
BR
power terminals (refer to item 3.2.1).
Make this connection with a twisted pair. Separate this
cable from any signal or control wire
.
Size the cable cross
section according to the application, by considering the
maximum current and the rms current.
If the braking resistor is installed inside the inverter panel,
consider the heat dissipated by the resistor when defining
the panel ventilation.
For critical applications with very short braking times, high
inertia loads (ex.: centrifuges) or with very short and frequent
duty cycles, contact WEG to define the most suitable resistor.
InverterModel
1.6 A/ 200-240 V
2.6 A/ 200-240 V
4.0 A/ 200-240 V
7.0 A/ 200-240 V
7.3 A/ 200-240 V
10A/ 200-240 V
16A/ 200-240 V
22A/ 200-240 V
28A/ 200-240 V
33A/ 200-240 V
1.0 A/ 380-480 V
1.6 A/ 380-480 V
2.6 A/ 380-480 V
2.7 A/ 380-480 V
4.0 A/ 380-480 V
4.3 A/ 380-480 V
6.5 A/ 380-480 V
10A/ 380-480 V
13A/ 380-480 V
16A/ 380-480 V
24A/ 380-480 V
30A/ 380-480 V
Maximum
BrakingCurrent
10 A
15 A
20 A
26 A
26 A
38 A
6 A
6 A
8 A
16 A
24 A
24 A
35 A
43 A
RMS
Braking
Current
(*)
5 A
7 A
10 A
13 A
18 A
18 A
3.5 A
3.5 A
4 A
10 A
14 A
14 A
21 A
27 A
Recommended
Resistor
39

27

22

15

15

10

127

127

100

47

33

33

22

18

Recommended
Wiring
2.5 mm
2
/ 14 AWG
2.5 mm
2
/ 14 AWG
4
mm
2
/ 12 AWG
6 mm
2
/ 10 AWG
6 mm
2
/ 10 AWG
6 mm
2
/ 10 AWG
1.5
mm
2
/ 16 AWG
1.5
mm
2
/ 16 AWG
2.5 mm
2
/ 14 AWG
4
mm
2
/ 12 AWG
6
mm
2
/ 10 AWG
6
mm
2
/ 10 AWG
6
mm
2
/ 10 AWG
6
mm
2
/ 10 AWG
P
max
(Maximum
Resistor Power)
3.9 kW
6.1 kW
8.8 kW
10.1 kW
10.1 kW
14.4 kW
4.6 kW
4.6 kW
6.4 kW
12 kW
19 kW
19 kW
27 kW
33 kW
P
rated
(Rated
Resistor Power)
0.98 kW
1.3 kW
2.2 kW
2.5 kW
3.2 kW
3.2 kW
1.6 kW
1.6 kW
1.6 kW
4.7 kW
6.5 kW
6.5 kW
7.9 kW
10.9 kW
Braking not available
Braking not available
Braking not available
(*)
The rms braking current can be determined by:
where t
br
corresponds to the sum of the braking times during the most
severe 5 minute cycle.
I
rms
=
I
max
.
t
br
[min]
5