Safety Instructions For Braking Resistors Chassis Format - Siemens SINAMICS S120 Equipment Manual

6.2.2.2

Safety instructions for braking resistors chassis format

Electric shock as a result of the connected voltage and residual charge of the DC link
capacitors at the Braking Module
Contact with live connections on the Braking Module can result in death or serious injury.
• Only connect the Braking Module when the Power Module is disconnected.
• Only connect the Braking Module after five minutes has elapsed. Measure the voltage
Fire through overheating due to insufficient ventilation clearances
Insufficient ventilation clearances can result in overheating with danger to persons as a
result of smoke and fire. This can also result in increased downtime and reduced service
lives for devices/systems.
• It is essential that you maintain a cooling clearance of 200 mm on all sides of the
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, which allow this fault to be ruled out.
• Protect the cables from mechanical damage.
• In addition, apply one of the following measures:
Burns resulting from high surface temperature of the braking resistor
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, at the
AC Drive
Manual, 06/2019, 6SL3097-5AL00-0BP1
WARNING
before starting work on the DCP and DCN DC-link terminals.
WARNING
component (with ventilation grills).
WARNING
– Use cables with double insulation.
– Observe adequate clearances, e.g. through the use of spacers.
– Route the cables in separate cable ducts or pipes.
CAUTION
dangerous locations, attach an appropriate warning note that is clearly visible and easy
to understand.
DC link components
6.2 Chassis
183