S120 Combi Power Modules
4.2 Safety information
SINAMICS S120 Combi
Manual, (GH9), 07/2016, 6SL3097-4AV00-0BP5
73
Danger to life through electric shock as well as fire hazard due to overcurrent protective
devices that trip too late
Overcurrent protective devices that do not trip or trip too late can cause an electric shock or
fire.
• To protect personnel and for fire protection purposes, at the infeed point, the short-
circuit rating and loop impedance must correspond to the specifications in the
documentation in order for the installed overcurrent protection devices to trip within the
specified time.
Danger to life through interruption of the external protective conductor due to high leakage
currents
The drive components conduct a high leakage current via the protective conductor.
Touching conductive parts when the protective conductor is interrupted can result in death
or serious injury.
• Ensure that the external protective conductor satisfies at least one of the followin
g
c
onditions:
– It has been laid so that it is protected against mechanical damage.
1)
– I
f it is a single cable, it has a cross-section of at least 10 mm² Cu.
– If it is a conductor of a multi-conductor cable, it has a cross-section of at least 2.5
mm²
Cu.
– It has a second protective conductor in parallel with the same cross-section.
– It complies with the local regulations for equipment with increased leakage current.
1)
Cables laid within control cabinets or closed machine housings are considered to be
adequately protected against mechanical damage.
Danger to life through electric shock due to incorrectly laid brake cables
If brake cables are laid without safe electrical separation, the insulation can fail with an
electric shock.
• Close the holding brake with the specified MOTION-CONNECT cable.
• Only use third-party cables with safe electrically separated brake cores or lay the brak
e
c
ores with safe electrical separation.
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