Electrical installation
4.10 Other connections
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A
135
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-protected connections to the braking resistor can cause fire with smoke in the event of
a short-circuit or ground fault that can cause severe injuries or death.
• Route the cables to the braking resistor so that a ground fault or short-circuit can be
ruled out.
• Comply with local installation regulations that enable this fault to be ruled out.
• Protect the cables from mechanical damage.
• Apply one of the following measures:
– Use cables with double insulation.
– Observe adequate clearances, e.g. through the use of spacers.
Route the cables in separate cable ducts or pipes.
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.
The -X5 terminal block for connection of the external braking resistor is located in the left
Basic Line Module (+H.A29).
Table 4- 36 Terminal block -X5 – connection for external braking resistor
Braking resistor connection
Braking resistor connection
Max. connectable cross-section: 70 mm²
Recommended connection cross-section: 50 mm².
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