Configuration
5.4 Braking resistor (armature short-circuit braking)
1FT2 synchronous motors for SINAMICS S120
70
Configuration Manual, 03/2021, A5E50645584B AA
Table 5- 3
Dynamic braking for 1FT2
Motor variant
Braking
resistor,
external
R
opt
/
Ω
Average braking torque
Maximum
braking
torque
M
br max
/ Nm
rms braking current
Without exter-
nal
braking resis-
tor
M
br rms
/ Nm
With external
braking resistor
M
br rms
(
R
opt
) /
Nm
Without ex-
ternal
braking resis-
tor
I
br rms
/ A
With external
braking resis-
tor
I
br rms
(
R
opt
) /
A
1FT2104-4AF
21
0.75
1.1
1.35
2.2
2
1FT2104-5AF
12.5
1.35
2.3
2.9
4.3
3.9
1FT2104-6AF
8.5
1.75
3.1
3.8
6
5.5
1FT2105-4AF
6.5
1.7
4
5
8.5
7.5
1FT2105-4AH
4.8
1.35
4
5
12.5
11
1FT2105-6AF
5
2.7
6.5
8
12
11
1FT2106-3AF
3.4
2.6
6.5
8.5
15
13.5
1FT2106-4AF
3.1
3.2
9
11
18.5
16.5
1FT2106-6AF
2.2
4.7
13.5
16.5
26
24
1FT2204-5AF
6
2.4
3.3
4.1
7
6
1FT2204-5AK
1.5
2.4
3.3
4.1
13.5
12.5
1FT2204-6AF
4.6
3.1
4.4
5.5
9.5
8.5
1FT2205-2AF
3.8
5
6.5
8
11
10
1FT2205-4AF
2.6
8
10.5
13
18
16.5
1FT2206-2AF
6.5
2.6
5.4
6.8
9.6
8.6
1FT2206-2AH
6.5
2.1
5.5
7
12.5
11
1FT2206-4AF
3.85
5.9
12.8
15.9
19.3
17.3
1FT2206-4AH
2.9
4.3
12
15
27
24
1FT2208-3AC
4
7.4
16.5
20.5
17.6
15.7
1FT2208-3AF
3.1
6.5
18
22
26
24
1FT2208-4AC
2.3
9.7
22.5
28
27
24.5
1FT2208-4AF
2.1
8.5
24
30
37
33
1FT2208-5AC
1.74
12.3
28.5
35.5
35.5
31.5
1FT2210-3AB
4.5
12.2
30.5
38
19.7
17.7
1FT2210-3AC
1.99
10.2
30.5
38
35
31
1FT2210-3AF
1.7
8.5
32
39
47
42
1FT2210-4AB
3.1
15.9
41.5
52
28
25
1FT2210-4AC
2.6
13.1
41.5
51
35.5
32
1FT2210-4AF
1.7
11
43
55
55
50
1FT2210-5AC
1.43
16.7
53
66
54
48.5
Note
Braking resistor with temperature monitoring
Use only a braking resistor with temperature monitoring.
