Siemens SINAMICS S150 NEMA Operating Instructions Manual page 131

Connecting the braking resistor
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 generation in the
event of a short-circuit or ground fault and cause serious injuries or death.
• Install the connections to the braking resistor in such a way that a ground fault or short-
• Comply with local installation regulations, which allow this fault to be ruled out.
• Protect the cables from mechanical damage.
• Take 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 property
damage due to component failure.
• Comply with the maximum cable length between the cabinet unit and the braking
Table 4- 41
Terminal
Max. connectable cross-section: 2/0 (70 mm²)
Recommended conductor cross-sections:
● For L61 / L64 (25 kW): #1 AWG (35 mm²)
● For L62 / L65 (50 kW): 1/0 (50 mm²)
Converter cabinet units
Operating Instructions, 11/2017, A5E36652151A
WARNING
circuit can be excluded.
– Use cables with double insulation.
– Observe adequate clearances, e.g. through the use of spacers.
– Route the cables in separate cable ducts or pipes.
resistor of 330 ft (100 m).
Terminal block -X5 – Connection for external braking resistor
1 Braking resistor connection
2 Braking resistor connection
Description of function
Electrical installation
4.9 Additional connections
129