Siemens Sinamics G120P Operating Instructions Manual page 118

Electrical installation
4.9 Other connections
Connecting the braking resistor
Danger to life due to fire caused by ground fault / short-circuit for non-protected
connections to the braking resistor
Non-fused connections to the braking resistor can cause fire with smoke development in
the event of a short-circuit or ground fault that can cause severe injuries or death.
• Lay the cables to the braking resistor so that a ground fault or short-circuit is precluded.
• Comply with local installation regulations that enable this fault to be ruled out.
• Protect the cables from mechanical damage.
• Adopt one of the following measures:
NOTICE
Material damage when exceeding the maximum permitted cable length
Exceeding the maximum permitted cable length to the braking resistor can cause material
damage in the event of component failure.
• Observe the maximum cable length between the cabinet unit and the braking resistor of
Table 4- 44
Terminal
Max. connectable cross-section:
- Finely stranded: 35 mm²
- Multi-stranded: 50 mm²
Connecting the thermostatic switch
The thermoswitch in the external braking resistor is connected at terminal X30:10/11. In the
delivered state, a jumper is present on both terminals that must be removed to evaluate the
thermoswitch.
If the thermoswitch is tripped, the external failure 1 (F07860) is initiated and the inverter
switched-off with OFF2.
118
WARNING
– Use cables with double insulation.
– Maintain adequate clearances, using spacers, for example.
– Route the cables in separate cable ducts or pipes.
100 m.
Terminals G and H on the Braking Module – connection for external braking resistor
G Braking resistor connection
H Braking resistor connection
Description of function
Operating Instructions, 12/2014, A5E32923362A
Inverter cabinet units