Braking Resistors; Description - Siemens SINAMICS S120 Equipment Manual

DC link components
6.2 Chassis
Article number
Max. cross-section that can be connected
Digital output (continued-short-circuit-proof)
Rated voltage
Max. load current of the digital output
Max. cross-section that can be connected
R1/R2 connection
Max. connection cross-section R1/R2
Weight
6.2.2

Braking resistors

6.2.2.1

Description

The braking resistor is used to reduce the excess DC link energy in regenerative operation.
The braking resistor is connected to the Braking Module. The braking resistor is mounted
outside the cabinet or switchgear room. This means that the resulting heat loss around the
Power Module can be dissipated - and cooling costs/equipment reduced.
Resistors with unit ratings of 25 kW and 50 kW are available.
Braking resistors can be used on Power Modules with a voltage range. This is the reason
that the voltage can be changed by setting the response thresholds at the Braking Module to
reduce the voltage stress on the motor and Power Module.
A temperature protection switch monitors the braking resistor for overtemperature and issues
a signal on a floating contact if the limit value is exceeded.
182
6SL3300–1AE31-3AA0
1.5 mm² (AWG 16)
24 VDC
500 mA
1.5 mm² (AWG 16)
M8 screw
35 mm² (AWG 2)
3.6 kg
Manual, 06/2019, 6SL3097-5AL00-0BP1
6SL3300–1AE32-5AA0
1.5 mm² (AWG 16)
24 VDC
500 mA
1.5 mm² (AWG 16)
M8 screw
50 mm² (AWG 1)
7.3 kg
AC Drive