Ransburg RPA-2 Powder Applicator A12950-XXX - Manual (Page 13)

RPA-2 POWDER APPLICATOR - Introduction
LN-9271-12.2 10
High Voltage Generation
The applicator high voltage control unit sup-
plies a high frequency low-voltage signal to
the cascade. This voltage is fed through the
applicator cable and the cascade connection.
The low-voltage signal is multiplied in the cas-
cade to produce the necessary high voltage
(up to 100 kV).
The high voltage is fed through a conductive
path in the atomizer to the central electrode
(see figure 1)
Round Jet Nozzle With Air
Cleaned Electrode
The round nozzle shapes and distributes the
powder. The powder cloud obtains a bell-
similar spray pattern by the deflector plate and
by the dynamic powder/air flow.
The powder is charged by means of the cen-
tral electrode. The high voltage, which is pro-
duced by the cascade in the applicator, is con-
nected to the electrode through the black con-
tact ring on the nozzle holder. The round noz-
zle front face is rinsed with compressed air in
order to prevent powder accumulations. The
electrode rinsing air is fed into the electrode
holder through the small hole in the black con-
tact ring of the nozzle holder. The electrode
rinsing air volume is typically maintained at a
constant setting of 40-50 SLPM.
BLACK CONTACT
RING
POWDER EXIT
FRONT FACE
CENTRAL
ELECTRODE
Round Nozzle (Figure