Siemens SINAMICS G120P, Operating Instructions Manual

Page: 118 / 496

Electrical installation
4.9 Other connections
Inverter cabinet units
118
Operating Instructions, 12/2014, A5E32923362A
Connecting the braking resistor
WARNING
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:
– Use cables with double insulation.
– Maintain adequate clearances, using spacers, for example.
– Route the cables in separate cable ducts or pipes.
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
100 m.
Table 4- 44 Terminals G and H on the Braking Module – connection for external braking resistor
Terminal Description of function
G Braking resistor connection
H Braking resistor connection
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.