WAGNER SprayPackE, Operating Manual

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59
VERSION 01/2020 ORDER NUMBER DOC2397091
SprayPackE
6.12 GROUNDING
The powder coating system must be perfectly grounded for safety reasons.
WAGNER recommends the use of copper cable of at least 16 mm² with sufficient mechanical
stability.
It is important for system safety and to achieve an optimum coating, that all system components
such as work pieces, conveyors, paint supply, control unit and booth or spraying stand are
perfectly grounded.
A poorly grounded work piece causes:
– dangerous electric charging of the work piece
– very bad wrap-around
– uneven coating
– back spraying to the spray gun, i.e., contamination
Prerequisites for perfect grounding and coating of a work piece are:
– electroconductive suspension for the work piece that is to be coated,
– grounding of the powder coating booth, transport and suspension equipment to
be provided on site in accordance with the corresponding operating manuals or
the definitions laid down by the manufacturer,
– regular cleaning of hangers from powder residues,
– that a grounding resistance of the work piece of 1 MΩ is not exceeded
(resistance to ground measured at 500 V or 1000 V),
– grounding cable connected to the controller module or control cabinet.
Sparks between conveyor, conveyor hooks (hangers) and work piece can occur if electric
contact points between conveyor, conveyor hooks (hangers) and work piece are not
sufficiently cleaned and therefore the work pieces are not sufficiently grounded!
These sparks can cause heavy radio frequency interference (EMC).