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Specifications are 50 Hz, 380 volt unit with a Power
factor correction as a standard feature.
Output terminals, control power terminal strip, and
controls are recessed or hinged covered to affect a
"dead front". Due to the excessive amount of stray
magnetic flux developed by the saturable reactor, the
center sections of the welder side panels are made of
a high impact, self-extinguishing, chemical resistant
plastic material. USE OF METALLIC PANELS IN
THEIR PLACE WILL RESULT IN EXCESSIVE HEAT-
ING OF THE PANELS AS WELL AS THE SHEET
METAL SCREWS USED IN THE ASSEMBLY OF
OTHER CASE PARTS.
$ED@EDG5<49>73EBB5>D is available in three overlap-
ping ranges by means of externally connecting the
electrode cables to the Min., Med., or Max. tap elec-
trode studs(See Technical Specifications in the
Installation Section).
>@ED!9>5+?<D175?=@5>C1D9?> maintains a rea-
sonably constant output within a range of ±10%
change in supply line voltage.
??<9>7 of the welder is accomplished by drawing air
in through the louvered case front panel, through the
reactor and transformer assemblies, and out the lou-
vered case rear panel. The two totally enclosed fan
motors used have sealed ball bearings and require no
lubrication maintenance.
1>4<9>7 of the welder and any attached devices
should be done with a fork-lift or pallet-jack capable of
loads exceeding the combined weight of the system.
$F5B<?14)85B=1<%B?D53D9?> is provided in three
areas: the 115 volt AC auxiliary power is fused for 8
amps; the saturable reactor control power circuit is
protected by a 40 amp fuse; the welder output power
circuit is protected by the familiar current transformer-
Klixon thermostat breaker. In the event of a control cir-
cuit or welder overload, the output contactors will
open and the fan motors will continue to operate. If
the overload is detected by the thermostatic breaker,
the temperature light located on the front panel will
illuminate until a safe operating temperature is
reached.
$ED@ED?>D13D?B control is provided by two S78
contactors connected in parallel. Input line contactors
are not provided. The customer is expected to provide
line starting and circuit breaking equipment.
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The IDEALARC™ AC-1500 is an upgraded design
with the following additional features:
• Higher output current and duty cycle capabilities.
It is a single phase transformer-saturable reactor type
power supply intended for use primarily in automatic
or semiautomatic variable voltage AC welding applica-
tions. It can be used to supply one automatic welder
head or two units may be used in Scott connection to
provide two phase power to two welder heads in tan-
dem. The welder can be used as is with NA-4 heads
or modified with available options to supply the earlier
NA-4 or LAF-4, and LT-34 welding heads.
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------------------------------------------------------------------------
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The output can be controlled either from the AC-1500,
the wire feeder or other remote locations.
To adjust the current from the wire feeder or other
remote locations, set the toggle switch on the front of
the AC-1500 to ‘Output Control Remote’. To adjust the
output current from the AC-1500, set this switch to
‘Output Control at AC-1500’.
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Start the AC-1500 using the line disconnect switch or
breaker installed with the input wiring. The red pilot
light on the front panel indicates when the welder is
on.
Adjust the output current from minimum to maximum
within the range set by the output stud connections
using either the ‘Output Control’ rheostat on the AC-
1500 (toggle switch set to ‘Local Control’) or the wire
feeder or other remote rheostat (toggle switch set to
‘Remote Control’).
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