Installation Of The Braking Resistor - WEG CFW-11 User Manual

Installation and Connection
Inverter Model
CFW11 0006 B2
CFW11 0006 S2 O FA
CFW11 0007 B2
CFW11 0007 S2 O FA
CFW11 0007 T2
CFW11 0010 S2
CFW11 0010 T2
CFW11 0013 T2
CFW11 0016 T2
CFW11 0024 T2
CFW11 0028 T2
CFW11 0033 T2
CFW11 0045 T2
CFW11 0054 T2
CFW11 0070 T2
3
CFW11 0086 T2
CFW11 0105 T2
CFW11 0003 T4
CFW11 0005 T4
CFW11 0007 T4
CFW11 0010 T4
CFW11 0013 T4
CFW11 0017 T4
CFW11 0024 T4
CFW11 0031 T4
CFW11 0038 T4
CFW11 0045 T4
CFW11 0058 T4
CFW11 0070 T4
CFW11 0088 T4
(1) The effective braking current presented is just an indicative value, because it depends on the braking duty cycle. The effective braking current can be
obtained from the equation below, where t
minutes.
t
I = I x br
effective max 5
(2) The P and P values (maximum and mean power of the braking resistor respectively) presented are valid for the recommended resistors and for the
max R
effective braking currents presented in
(3) For specifications on the recommended terminal type (screw and tightening torque) for the connection of the braking resistor (terminals DC+ and BR),
refer to the DC+ terminal specification at the
C. It is necessary to break off those covers in order to get access to these terminals.

3.2.3.2.2 Installation of the Braking Resistor

Install the braking resistor between the power terminals DC+ and BR.
Use twisted cable for the connection. Separate these cables from the signal and control cables. Size the cables
according to the application, respecting the maximum and effective currents.
If the braking resistor is installed inside the inverter cabinet, consider its additional dissipated energy when sizing
the cabinet ventilation.
Set parameter P0154 with the resistor value in ohms and parameter P0155 with the maximum resistor power
in kW.
3-22 | CFW-11
Table 3.4 - Dynamic braking specifications
Maximum Maximum
Braking Braking Power
Current (Peak Value)
(I ) (P )
(2)
max max
[A] [kW]
7.8 3.1
7.8 3.1
12.1 4.8
12.1 4.8
7.8 3.1
14.8 5.9
12.1 4.8
14.8 5.9
20.0 8.0
26.7 10.7
30.8 12.3
30.8 12.3
44.0 17.6
48.8 19.5
48.8 19.5
133 53.3
133 53.3
8.0 6.4
8.0 6.4
8.0 6.4
14.3 11.4
14.3 11.4
14.3 11.4
36.4 29.1
40.0 32.0
40.0 32.0
66.7 53.3
66.7 53.3
66.7 53.3
129 103
is given in minutes and corresponds to the sum of all braking times during the most severe cycle of 5 (five)
br
Table 3.4 on page 3-22. The resistor power shall be changed according to the braking duty cycle.
Table 3.2 on page 3-14. There are plastic covers in front of the DC-, DC+ and BR terminals at the frame size
Dissipated
Effective
Power
Braking Recommended
(Mean Value)
Current
in the Braking
(I )
(1)
Resistor (P )
effective (2)
[A]
R
[kW]
5.20 1.4
5.20 1.4
6.96 1.6
6.96 1.6
5.20 1.4
10.83 3.2
6.96 1.6
8.54 2.0
14.44 4.2
19.15 5.50
18.21 4.3
16.71 3.6
33.29 10.1
32.17 8.49
26.13 5.60
90.67 24.7
90.87 24.8
3.54 1.3
5.20 2.7
5.20 2.7
8.57 4.1
10.40 6.1
12.58 8.9
16.59 6.1
20.49 8.4
26.06 13.6
40.00 19.2
31.71 12.1
42.87 22.1
63.08 24.7
Power Wire Size
(Terminals DC+
Resistor
and BR)
(3)
[Ω]
[mm (AWG)]
2
51 1.5 (16)
51 1.5 (16)
33 1.5 (16)
33 1.5 (16)
51 1.5 (16)
27 2.5 (14)
33 1.5 (16)
27 2.5 (14)
20 4 (12)
15 6 (10)
13 6 (10)
13 6 (10)
9.1 10 (8)
8.2 10 (8)
8.2 6 (8)
3.0 35 (2)
3.0 35 (2)
100 1.5 (16)
100 1.5 (16)
100 1.5 (16)
56 2.5 (14)
56 2.5 (14)
56 2.5 (12)
22 4 (10)
20 6 (10)
20 6 (8)
12 10 (8)
12 10 (8)
12 10 (6)
6.2 25 (4)