Siemens S120 Manual page 240

Motor-side power components
6.2 Chassis
Danger to life caused by high discharge currents when the external protective conductor is
interrupted
dV/dt filters plus Voltage Peak Limiter result in a high discharge current via the protective
conductor. When the protective conductor is interrupted, touching live components can
result in electric shock, which can lead to death or serious injuries.
• Ensure that the external protective conductor complies with at least one of the following
Risk of fire and device damage as a result of ground fault / short-circuit
The connection to the DC link of the Power Module 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:
Danger of fire through overheating for insufficient ventilation clearances
Insufficient ventilation clearances result in overheating with danger to persons as a result of
smoke and fire. Further, increased failures can occur and the service life of units/systems
shortened.
• It is essential that you maintain 100 mm ventilation clearances above and below the
Risk of burns resulting from high surface temperature of the dV/dt reactor
The surface temperatures of dV/dt reactors can exceed 80° C. You can be severely burnt
when touching the surface.
• Mount the dV/dt reactors so that they cannot be touched. If this is not possible, at the
240
WARNING
conditions:
– It is laid protected against mechanical damage.
– For an individual core, it has a cross-section of at least 10 mm² Cu.
– As core of a multi-core cable, it has a cross-section of at least 2.5 mm² Cu.
– It has a parallel, second protective conductor with the same cross-section.
– It corresponds to the local regulations for equipment with increased leakage current.
Cables routed in control cabinets or enclosed machine enclosures are considered to
1)
be adequately protected against mechanical damage.
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.
WARNING
component.
CAUTION
dangerous locations, attach an appropriate warning note that is clearly visible and easy
to understand.
1)
Manual, (GH6), 04/2014, 6SL3097-4AL00-0BP4
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