18 Safety instructions
Grounding
These instructions are for all personnel who are responsible for the grounding of the drive.
WARNING! Obey these instructions. If you ignore them, injury or death, or
equipment malfunction can occur, and electromagnetic interference can increase.
• If you are not a qualified electrician, do not do grounding work.
• Always ground the drive, the motor and adjoining equipment. This is necessary for the
personnel safety. Proper grounding also reduces electromagnetic emission and
interference.
• Make sure that the conductivity of the grounding conductors is sufficient. See section
Selecting the power cables on page 55. Obey the local regulations.
• Connect the power cable shields to protective earth (PE) of the drive to make sure of
personnel safety.
• Make a 360° grounding of the power and control cable shields at the cable entries to
suppress electromagnetic disturbances.
• In a multiple-drive installation, connect each drive separately to the protective earth
(PE) busbar of the switch board or the transformer.
Note:
• You can use power cable shields as grounding conductors only when their conductivity
is sufficient.
• As the normal touch current of the drive is higher than 3.5 mA AC or 10 mA DC, you
must use a fixed protective earth connection. See standard EN 61800-5-1, 4.3.5.5.2.
General safety in operation
These instructions are for all personnel that operate the drive.
WARNING! Obey these instructions. If you ignore them, injury or death, or or
damage to the equipment can occur.
• Keep the cabinet doors closed when the drive is powered. With the doors open, a risk
of a potentially fatal electric shock, arc flash or high-energy arc blast exists.
• If you have a cardiac pacemaker or other electronic medical device, keep away from
the area near motor, drive, and the drive power cabling when the drive is in operation.
There are electromagnetic fields present which can interfere with the function of such
devices. This can cause a health hazard.
• Give a stop command to the drive before you reset a fault. If you have an external
source for the start command and the start is on, the drive will start immediately after
the fault reset, unless you configure the drive for pulse start. See the firmware manual.
• Before you activate the automatic fault reset or automatic restart functions of the drive
control program, make sure that no dangerous situations can occur. These functions
reset the drive automatically and continue operation after a fault or supply break. If
these functions are activated, the installation must be clearly marked as defined in
IEC/EN 61800-5-1, subclause 6.5.3, for example, "THIS MACHINE STARTS
AUTOMATICALLY".
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