Siemens SIMOTICS S-1FT7 - Page 128

Configuration
5.4 Brake resistances (armature short-circuit braking)
S-1FT7 synchronous motors
126 Configuration Manual, 09/2018, A5E45099423B AA
1FT7 Compact, forced ventilation
Table 5- 4 Armature short-circuit braking with/without external braking resistors
Motor type
External brak-
ing resistor
R
opt
/ Ω
Average braking torque M
Br rms
/
Nm
Max. braking
torque M
Br max
/
Nm
rms braking current I
br rms
[A]
Without external
braking resistor
With external
braking resis-
tor
Without exter-
nal braking
resistor
With external
braking resis-
tor
1FT7084-5SC7
2.5
7
18
22
23
21
1FT7084-5SF7
2.0
6
18
22
33
29
1FT7084-5SH7 1.6 4 17 20 44 39
1FT7086-5SC7
2.1
9
24
29
30
27
1FT7086-5SF7
2.2
5
24
29
44
39
1FT7086-5SH7
1.6
5
24
29
53
47
1FT7105-5SC7
1.3
15
50
62
56
50
1FT7105-5SF7
0.9
12
50
62
81
73
1FT7108-5SC7
1.1
19
69
86
70
63
1FT7108-5SF7
0.8
15
71
88
103
92
1FT7132-5SB7
1.2
36
94
117
68
61
1FT7132-5SC7
1
30
94
118
86
77
1FT7132-5SF7
0.8
22
94
118
122
109
1FT7134-5SC7
0.7
35
125
156
122
109
1FT7134-5SF7
0.5
26
125
155
170
154
1FT7136-5SB7
0.9
51
157
196
101
91
1FT7136-5SC7
0.6
41
156
194
142
128
1FT7138-5SB7
0.6
57
185
231
132
120