Eutectic Castolin GSX 750 ITAIPU, Operating Manual

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Do not use electrical system “neutral”
for grounding connection.
6.4 - Welding circuit
GSX 750 rectifier good performance de-
pends on use of a Copper working cable,
insulated, in optimal conditions, firmly fas-
tened to its terminals, as short in length as
possible and compatible with considered
applications. Also connections to work
piece or to working bench and “negative”
terminal should be well fastened.
No matter its lotal length (which should
always be as short as possible) and no
matter the welding current in use, the dia-
meter of working cable should correspond
to maximum current GSX 750 rectifier can
supply at 60% duty cycle.
Electrical resistance of welding circuit
causes tension dropping allied to internal
dropping (natural of rectifier itself) genera-
ting reduction in arc tension and maximum
current available, making arc unstable.
7 - Operation
After connecting GSX 750 to mains and
properly connecting electrode-holder and
working cable:
1 - Put on-off switch in “on” position.
Exhauster engine starts rotating so
providing necessary refrigeration air
flow to the equipment.
2 - Pre-adjust welding current using
crank on front panel. By rotating
crank clock-wise, current value
increases; by rotating it in the
opposite direction, current value
decreases.
Attention!
Welding parameters adjustment will ba-
sically depend on electrode material and
diameter, on work piece width and welding
position.
3 - Proceed to arc ignition and, if
necessary, adjust current.
8 - Maintenance
Under normal operation conditions, GSX
750 rectifier does not require special main-
tenance. It is enough to clean it internally,
once in a month, using dry and oil free
compressed air at low pressure.
After this procedure, check electrical
connections and components fastening.
Check as well eventual damage signs
on electrical wiring and cables, including
working cable and other insulating mate-
rials. Replace them in case of any damage
signs.
When overloaded due to lack of refrigera-
tion or working conditions not projected
by Eutectic do Brasil, rectifying bridge can
be damaged by opening or short-circuit.
Under these circumstances, no-load volta-
ge is inferior to recommended value and
rectifying bridge should be replaced.
9 - Repair
In order to assure optimum performance of
an Eutectic equipment, only original spare
parts, supplied or approved by Eutectic do
Brasil, should be used. Utilization of non-
original or non-approved parts cancels the
warranty.