IMO SD1 Series - Braking Resistor Installation

SD1 Series Inverters Optional Peripheral Accessories
-161-
Model
Type of
braking
unit
Braking
resistor at
100% of
braking
torque (Ω)
Consumed power of the braking
resistor (kW)
Min.
braking
resistor
(Ω)
10%
braking
50%
braking
80%
braking
SD1-2.5A-43
653
0.11
0.56
0.90
240
SD1-4.2A-43
326
0.23
1.13
1.80
170
SD1-5.5A-43
222
0.33
1.65
2.64
130
SD1-9.5A-43
122
0.6
3
4.8
80
SD1-14A-43
89.1
0.75
4.13
6.6
60
SD1-18.5A-43
65.3
1.13
5.63
9
47
SD1-25A-43
44.5
1.65
8.25
13.2
31
SD1-32A-43
32.0
2.25
11.3
18
23
SD1-38A-43
27
3
14
22
19
SD1-45A-43
22
3
17
26
17
SD1-60A-43
17
5
23
36
17
SD1-75A-43
13
6
28
44
11.7
SD1-92A-43
10
7
34
54
8
SD1-115A-43
8
8
41
66
8
SD1-150A-43
6.5
11
56
90
6.4
SD1-180A-43
5.4
14
68
108
4.4
SD1-215A-43
4.5
17
83
132
4.4
Note:
 Select the resistor and power of the braking unit according to the data our company
provided.
 The braking resistor may increase the braking torque of the inverter. The resistor power in
the above table is designed on 100% braking torque and 10% braking usage ratio. If the
users need more braking torque, the braking resistor can decrease properly, and the power
needs to be magnified.

Never use a braking resistor with a resistance below the minimum value
specified for the drive. The drive and the internal chopper are not able to
handle the overcurrent caused by the low resistance.
 Increase the power of the braking resistor properly in the frequent braking
situation (the frequency usage ratio is more than 10%).
C.7.2 braking resistor installation
Braking resistor cables need to be shielded cables.
Install all resistors in a place where they will cool.