Residual Risks; Safety And Warning Signs On Frequency Inverter - BONFIGLIOLI Agile Applications Manual

For, example, the machine/plant must not be operated
 by uninstructed staff,
 while it is not in perfect condition,
 without protection enclosure (e.g. covers),
 without safety equipment or with safety equipment deactivated,
 when general requirements, such as operating conditions and technical data, are not met.
The manufacturer shall not be held liable for any damage resulting from such misuse. The sole risk shall
be borne by the operator.
Explosion protection
The frequency inverter is an IP 20 ingress protection rating device. For this reason, use of the device in
explosive atmospheres is not permitted.

2.4 Residual risks

Residual risks are special hazards involved in handling of the frequency inverter which cannot be elimi-
nated despite the safety-compliant design of the device. Residual risks are not obviously identifiable and
can be a potential source of injury or a health hazard.
Typical residual hazards include:
Electrical hazard
 Danger of contact with energized components due to a defect, opened covers or enclosures or
improper working on electrical equipment.
 Danger of contact with energized components in frequency inverter if no external disconnec-
tion device was installed by the operator.
During operation, all covers must be installed correctly, and all electrical cabinet doors must be closed
to minimize electrical hazards.
When LEDs and other indicating elements on the frequency inverter go out, this does not necessarily
mean that the device is deenergized. Before carrying out any Work at the device where contact with
energized parts might be possible, it must be checked in any case, i.e. irrespective of the status of any
indicating elements that may be installed, if the device is deenergized.
Charged capacitors in DC link
Sizes 1 through 7 (up to 160 kW): The DC-link may have dangerous voltage levels even up to 3 minutes
after shutdown.
Size 8 (as from 160 kW): The DC-link may have dangerous voltage levels even up to 10 minutes after
shutdown.
Electrostatic charging
Touching electronic components entails the risk of electrostatic discharges.
Thermal hazards
Risk of accidents by hot machine/plant surfaces, e.g. heat sink, transformer, fuse or sine filter.
Danger of equipment falling down/over, e.g. during transport
Center of gravity is not the middle of the electrical cabinet modules.

2.5 Safety and warning signs on frequency inverter

Comply with all safety instructions and danger information provided on the frequency inverter.
Safety information and warnings on the frequency inverter must not be removed.
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