Siemens SIMOTICS S-1FK2 Series Configuration Manual page 64

Configuration
5.4 Braking resistor (armature short-circuit braking)
The data in the following tables is calculated for rated values according to the data sheet.
The variance during production as well as iron saturation have not been taken into account
here. Higher currents and torques than those calculated can occur as a result of the
saturation.
Risk of fire caused by continuous overload
If the external braking resistor is continuously overloaded, for example as the result of a
defective braking chopper, this can cause an explosion or fire - resulting in death or severe
injury and/or could cause the housing to melt.
• Use only braking resistors that are intrinsically safe.
Table 5- 3 Dynamic braking for 1FK2
Motor variant Braking
resistor,
external
R
/ Ω
opt
1FK2104-4AF 21
1FK2104-5AF 12.5
1FK2104-6AF 8.5
1FK2105-4AF 6.5
1FK2105-6AF 5.0
1FK2204-5AF 6.0
1FK2204-6AF 4.6
1FK2205-2AF 3.8
1FK2205-4AF 2.6
1FK2206-2AF 6.5
1FK2206-4AF 3.85
1FK2208-3AC 4.0
1FK2208-4AC 2.3
1FK2208-5AC 1.74
1FK2210-3AC 1.99
1FK2210-4AC 2.6
1FK2210-5AC 1.43
1FK2306-2AC 9.8
1FK2306-4AC 7.0
1FK2308-3AB 4.8
1FK2308-4AB 3.9
Note
Braking resistor with temperature monitoring
Use only a braking resistor with temperature monitoring.
62
WARNING
Average braking torque
Without external
Braking resistor
M
/ Nm
br rms
0.75
1.35
1.75
1.7
2.7
2.4
3.1
5.0
8.0
2.6
5.9
7.4
9.7
12.3
10.2
13.1
16.7
3.3
7.4
9.5
12.6
Maximum
braking torque
With external
M
br max
braking resistor
M R
( ) / Nm
br rms opt
1.1
2.3
3.1
4.0
6.5
3.3
4.4
6.5
10.5
5.4
12.8
16.5
22.5
28.5
30.5
41.5
53
5.5
12.9
17.6
23.5
rms braking current
Without external
/ Nm
Braking resistor
I
/ A
br rms
1.35 2.2
2.9 4.3
3.8 6.0
5.0 8.5
8.0 12.0
4.1 7.0
5.5 9.5
8.0 11.0
13.0 18.0
6.8 9.6
15.9 19.3
20.5 17.6
28.0 27.0
35.5 35.5
38.0 35.0
51 35.5
66 54
6.9 6.1
16.1 11.2
22 13.9
29.5 18
1FK2 synchronous motors for SINAMICS S120
Configuration Manual, 06/2019, A5E46927724B AB
With external
Braking resistor
I R
( ) / A
br rms opt
2.0
3.9
5.5
7.5
11.0
6.0
8.5
10.0
16.5
8.6
17.3
15.7
24.5
31.5
31.0
32.0
48.5
5.5
10.1
12.5
16.2