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

5.2.1.2

Safety instructions for Braking Modules 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 residual charge of the DC-link capacitors
Due to the DC-link capacitors, a hazardous voltage is present in the DC link for up to five
minutes after the power supply has been switched off.
Touching live components results in death or severe injury.
• Only carry out work on these components after this time has elapsed.
• Measure the voltage before starting work on the DCP and DCN DC-link terminals.
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:
NOTICE
Damage due to impermissible braking resistor
An impermissible braking resistor may become damaged.
• Only use braking resistors that SIEMENS has authorized for SINAMICS.
AC Drive
Manual, (GH6), 07/2016, 6SL3097-4AL00-0BP5
WARNING
DANGER
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.
DC link components
5.2 Chassis
169