11/03 Electrical Installation
SINAMICS G150
Operating Manual
4-35
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 block X5 – connection for external braking resistor
Terminal Function description
R1 Braking resistor connection
R2 Braking resistor connection
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 Installing the thermostat for the external braking resistor in the monitoring train
of the cabinet unit
Terminal Function description
T1 Thermostat connection: connection with terminal X541:1 (P24 V)
T2 Thermostat connection: connection with terminal X541:5 (DI11)
Max. connectable cross-section: 2.5 mm² (AWG 12)
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