Note
Inform the manufacturer about each maintenance job that has been carried out and about each
spare part replacement for the purposes of a reliability analysis.
9.2
Grounding the system
WARNING
Electric shock even after shutdown
High voltages can still be present even after shutdown. Touching the device can result in death
or serious injury.
• Only work on the power unit if it has been sufficiently grounded. Before touching the device,
carefully ensure that the power unit is in a no-voltage condition:
• Always observe the 5 safety rules when working on the equipment.
Carefully read and understand the notes provided in the operating instructions of the upgraded
converter.
Disconnecting the demagnetization equipment from the low-voltage supply
For systems with demagnetizing equipment, in addition to disconnecting the medium voltage,
you must also disconnect the demagnetization equipment from the low-voltage supply.
DANGER
Electric shock hazard
To demagnetize, for example, the demagnetizing equipment generates a medium voltage
from the 400 V supply and feeds this medium voltage into the system. When working on the
system and with the fuse switch disconnector closed, if this voltage is touched, then it can
result in death or severe physical injury.
• Always open the fuse switch disconnector before working on the system. Observe the five
safety rules.
Maintenance
9.2 Grounding the system
3rd Party LCI Control Upgrade
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Operating Instructions, 02/2022, A5E31872818
