Safety Information - Siemens SINAMICS S120 Equipment Manual

Line Modules
5.3 Smart Line Modules
5.3.2

Safety information

Not observing fundamental safety instructions and residual risks
Not observing fundamental safety instructions and residual risks listed in Chapter 1 can
result in accidents with severe injuries or death.
• Comply with the fundamental safety instructions.
• When assessing the risk, take into account remaining risks.
Electric shock due to a high DC link voltage
As long as the Line Module is connected to the line supply, the DC link is charged with a
high voltage. Contact with components can result in death or serious injury.
• Isolate the Line Module from the line supply during installation of maintenance work, e.g.
Electric shock or fire due to overcurrent protective equipment that trips 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-
High leakage currents when the protective conductor in the line feeder cable is interrupted
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 following
160
WARNING
DANGER
via the line contactor or main switch.
WARNING
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.
WARNING
conditions:
– It has been installed so that it is protected against mechanical damage.
– For an individual core, 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.
Cables laid within control cabinets or closed machine housings are considered to be
1)
adequately protected from mechanical damage.
1)
Air-cooled chassis power units
Manual, 07/2019, 6SL3097-4AE00-0BP9