Siemens SINAMICS G150 Operating Manual page 67

11/03
Connecting the Braking Resistor
WARNING
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 connection cables between the cabinet unit and external braking
resistor must not exceed 50 m.
Table 4-27
Terminal
R1
R2
Max. connectable cross-section: 70 mm² (AWG 000)
Recommended cable cross-sections:
• For L61 (100 kW): 35 mm² (AWG 0)
• For L62 (200 kW): 50 mm² (AWG 00)
Table 4-28
Terminal
T1
T2
Max. connectable cross-section: 2.5 mm² (AWG 12)
SINAMICS G150
Operating Manual
Terminal block X5 – connection for external braking resistor
Function description
Braking resistor connection
Braking resistor connection
Installing the thermostat for the external braking resistor in the monitoring train
of the cabinet unit
Function description
Thermostat connection: connection with terminal X541:1 (P24 V)
Thermostat connection: connection with terminal X541:5 (DI11)
Electrical Installation
4-35