Siemens SINAMICS S120 Combi - Safety Instructions for Braking Resistors

DC link components
7.3 Braking resistors
SINAMICS S120 Combi
Manual, 11/2017, 6SL3097-4AV00-0BP7
177
7.3.2
Safety instructions for braking resistors
WARNING
Risk of fire and device damage as a result of ground fault / short-circuit
The cables to the braking resistor must be routed so that a ground fault or short-circuit can
be ruled out. A ground fault can result in fire with associated smoke.
• Comply with local installation regulations that enable this fault to be ruled out.
• Protect the cables from mechanical damage.
• In addition, apply one of the following measures:
– Use cables with double insulation.
– Maintain adequate clearance, e.g. using spacers.
–
Route the cables in separate cable ducts or pipes.
CAUTION
Burns due to high surface temperatures
The braking resistor can become very hot. You can be severely burnt when touching the
surface.
• Mount the braking resistor so that it cannot be touched. If this is not possible, attach a
clearly visible and understandable warning notice at hazardous positions.
• To prevent adjacent components from suffering damage due to these high
temperatures, maintain a clearance of 100 mm on all sides of the braking resistor.