DC link components
7.3 Braking resistors
SINAMICS S120 Combi
176 Manual, 11/2017, 6SL3097-4AV00-0BP7
A braking resistor is used to dissipate the excess DC link energy in generator operation. One
braking resistor is connected to one Braking Module.
Resistors without thermostatic switch are available with various power ratings.
The braking resistors can be installed standing on the floor of the control cabinet or
suspended. You must ensure that the braking resistors do not obstruct the flow of cooling air
to the drive line-up.
Positioning the braking resistor outside the control cabinet or switchgear room enables the
resulting thermal losses to be routed away. This reduces the level of air conditioning
required.
A shielded connection cable (3 m, 3 x 1.5 mm
2
) is supplied with braking resistor 6SN1113-
1AA00-0DA0.
Other braking resistors are supplied without connecting cable. The maximum conductor
cross-sections are listed in the technical data.
The maximum cable length for all braking resistors is 10 m.
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