1FT6 Synchronous Motors - Siemens Industry, Inc.

Table 1-6 Resistor braking for the 1FT6 series, water cooling
Motor type
Braking
resistor
external
R opt [Ω]
Average braking torque
M br rms [Nm] Max.
without
external
braking resistor
with
external
braking resistor
braking
torque
M br max [Nm]
Motor Description
Armature short-circuit braking
RMS braking current
I br rms [A]
without
external
braking resistor
Max.
braking
torque
M br max [Nm]
1FT6163-8WD7� 0.25 2) – 380 490 – 390
1FT6168-8WB7� 0.27 2) – 530 680 – 340
1) When utilized acc. to M0 (100 K), a series braking resistor must be used in order to prevent partial de-magnetization.
When utilized according to M0 (60 K), the additional braking resistor is not required.
2) It is absolutely prohibited to short-circuit the winding when using smaller supplementary resistors than those specified.
When braking from the rated speed, the resistors listed prevent partial de-magnetization of the rotor.
1FT6 Synchronous Motors
Configuration Manual, (PFT6), 10.2005 Edition, 6SN1197-0AD02-0BP1 1-21