Siemens SINAMICS S150 Operating Instructions Manual page 82

Electrical installation
4.9 Other connections
Connecting the braking resistor
The cables must only be connected to terminal block -X5 when the cabinet unit is switched
off and the DC link capacitors are discharged.
CAUTION
The braking resistor cables must be laid in such a way that they are short-circuit and
ground-fault proof.
The length of the connecting cables between the cabinet unit and external braking resistor
must not exceed 50 m.
Table 4-31
Max. connectable cross-section: 70 mm² (AWG 2/0)
Recommended cable cross-sections:
● For L61/L64 (25 kW): 35 mm² (AWG 1)
● For L62/L75 (50 kW): 50 mm² (AWG 1/0)
Table 4-32
Max. connectable cross-section (due to TM31): 1.5 mm² (AWG 14)
82
WARNING
Terminal block -X5 – connection for external braking resistor
Terminal
1 Braking resistor connection
2 Braking resistor connection
Installing the thermostatic switch for the external braking resistor in the monitoring train
of the cabinet unit
Terminal
T1 Thermostatic switch connection: connection with terminal X541:1 (P24 V)
T2 Thermostatic switch connection: connection with terminal X541:5 (DI11)
Description of function
Description of function
Operating Instructions, 07/07, A5E00288214A
Drive converter cabinet units