ESAB ESP-400C Installation, Operation And Maintenance Manual page 25

Plasma power source
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SECTION 3
Connections for Parallel Installation
of 2 Power sources
Secondary Power
Source
work
electrode
(+)
(-)
3 - 4/0 600V
4/0 600V
Cable jumpers
positive
between units
leads
to
workpiece
WARNING
!
Secondary Power
Source
work
electrode
(+)
(-)
Disconnect
negative
3 - 4/0 600V
connection from
positive leads to
secondary power source
workpiece
and insulate to
convert from two
to one power
sources
Primary Power
Source
work
electrode
(+)
(-)
pilot arc
1 - 14 AWG 600V
3 - 4/0 600V
lead to pilot arc
negative
connection in
leads in
plumbing box
plumbing
(h.f. generator)
box (h.f.
generator)
Primary Power
Source
work
electrode
(+)
(-)
3 - 4/0 600V
negative leads
to plumbing box
(high freq.
generator)
ESP-400C Plasma Power Source
Note: Primary power source has the electrode
(-) conductor jumpered. The secondary power
source has the work (+) jumpered.
1. Connect the negative (-) output cables to the
plumbing box (high frequency generator).
2. Connect the positive (+) output cables to the
workpiece.
3. Connect the positive (+) and negative (-)
conductors between the power sources.
4. Connect the pilot arc cable to the pilot arc
terminal in the primary power source. The pilot
arc connection in the secondary power source
is not used. The pilot arc circuit is not run in
parallel.
5. Set the Pilot Arc HIGH/LOW switch on the
secondary power source to "LOW".
6. Set the Pilot Arc HIGH/LOW switch on the
primary power source to "HIGH".
Electric Shock Can Kill!
Exposed Electrical Conductors Can
Be Hazardous!
Do not leave electrically "hot " conductors
exposed. When disconnecting the
secondary power source from the primary,
verify the correct cables were
disconnected. Insulate the disconnected
ends.
When using only one power source in a
parallel configuration, the negative
electrode conductor must be disconnected
from the secondary power source and the
plumbing box. Failure to do this will leave
the secondary electrically "hot".
Installation
3-7

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