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

DC link components
5.2 Chassis
5.2.2.2

Safety instructions for braking resistors chassis format

Danger to life if the fundamental safety instructions and residual risks are not observed
The non-observance of the fundamental safety instructions and residual risks stated in
Chapter 1 can result in accidents with severe injuries or death.
• Observe the fundamental safety instructions.
• Consider the residual risks for the risk evaluation.
Danger to life due to electric shock caused by applied voltage and residual charge of the
DC-link capacitors on 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
Danger of fire through overheating for 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
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, which allow this fault to be ruled out.
• Protect the cables from mechanical damage.
• In addition, apply one of the following measures:
180
WARNING
DANGER
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.
Manual, (GH6), 07/2016, 6SL3097-4AL00-0BP5
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