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SURVEY OF TESTS TABLE (Cont.)
Kind of Test
Effectivity of measures
for protection against
direct contact
Interlocks / protection
against entrance
Effectivity of grounding
measures
LN-9282-14
Requirements
• On all doors and openings of the spraying area where
the hazard of contact with parts under high voltage
exists the presence of the high voltage shall be
safeguarded in such a way that the high voltage is
disconnected when entrance is gained. The inter-
lock shall satisfy the performance level d of EN ISO
13849-1. Other openings of the spraying area through
which parts under high voltage could be contacted
shall be locked in such a way to be only opened by
keys or tools. When using systems of types C-L and
D-L an interlock of the high voltage with all doors
and openings shall be installed to prevent an electric
shock of persons.
• All conductive components of the equipment, like
floor, walls, ceilings, fences, conveyors, workpiec-
es, containers for coating material, reciprocators or
elements or elements of construction etc. within the
spraying area, except for parts under high voltage
for operational reasons, shall be connected to the
grounding system. Parts of the booth shall be earthed
in compliance with EN 12215:2004.
• If an appropriate grounding of the conductive parts
according to 5.7.1 cannot be achieved, the possible
discharge energy shall not exceed 0, 24mJ.
• The resistance to earth from the suspending point of
each workpiece shall not exceed 1 MΩ. The voltage
during measurement shall be 500 V or 1000 V. The
construction of hangers shall ensure that the work-
pieces remain earthed during the coating process.
Note: Since workpieces are often earthed by metallic hooks,
it is important to clean these hooks regularly or to design
them in such a way, that the built-up of insulating layers of
coating materials is prevented.
• If an appropriate grounding of the workpiece accord-
ing to 5.7.1 cannot be ensured, the dissipation of
electrical charges at the workpiece by other devices,
e.g. ionizers, is permitted. Such devices shall not ex-
ceed the permitted discharge energy of the spraying
systems, for which they are used. Moreover, these
devices shall be submitted to the same test for ad-
missible discharge energy as the spraying systems
they are used with. The dissipation device shall be
interlocked with the spraying system in such a way
to disconnect the high voltage and to stop coating
in case of failure of this dissipation device.
Aerobell 268 - Appendix A
Review & Testing
Interval
Weekly
Weekly
85
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