ABB ACS355 User Manual page 390

390 Appendix: Resistor braking
Equations for selecting the resistor:
Eq. 1. U = 200...240 V:
N
U = 380...415 V:
N
U = 415...480 V: R =
N
Eq. 2. E = P
Rpulse Rmax
Eq. 3. P = P
Rave Rmax
where
R = selected brake resistor value (ohm)
P = maximum power during the braking cycle (W)
Rmax
P = average power during the braking cycle (W)
Rave
E = energy conducted into the resistor during a single braking pulse (J)
Rpulse
t = length of the braking pulse (s)
on
T = length of the braking cycle (s).
Resistor types shown in the table are pre-dimensioned resistors using the maximum
braking power with cyclic braking shown in the table. Resistors are available from
ABB. Information is subject to change without further notice.
Type R
min
ACS355-
1)
x = E/U ohm
1-phase U = 200...240 V (200, 208, 220, 230, 240 V)
N
01x-02A4-2 70
01x-04A7-2 40
01x-06A7-2 40
01x-07A5-2 30
01x-09A8-2 30
3-phase U = 200...240 V (200, 208, 220, 230, 240 V)
N
03x-02A4-2 70
03x-03A5-2 70
03x-04A7-2 40
03x-06A7-2 40
03x-07A5-2 30
03x-09A8-2 30
03x-13A3-2 30
03x-17A6-2 30
03x-24A4- 2 18
03x-31A0-2 7
03x-46A2-2 7
150000
R =
P
Rmax
450000
R =
P
Rmax
615000
P
Rmax
·
t
on
t
on
·
T
R P
max BRmax
ohm kW hp
390 0.37 0.5
200 0.75 1
130 1.1 1.5
100 1.5 2
70 2.2 3
390 0.37 0.5
260 0.55 0.75
200 0.75 1
130 1.1 1.5
100 1.5 2
70 2.2 3
50 3.0 4
40 4.0 5
25 5.5 7.5
19 7.5 10
13 11.0 15
t
on
T
For conversion, use 1 hp = 746 W.
Selection table by resistor type
CBR-V / CBT-H
160 210 260 460 660 560
P
Rmax
P
Rave
2)
Braking time
s
90
45
28
19
14
90
60
42
29
19
14
16
12
45
35
23