Lincoln Electric PERKINS SA-250 - Manual (Page 8)

GENERAL DESCRIPTION
The SA-250 is a heavy duty engine-driven DC arc
welding power source capable of providing constant
current output for stick welding or DC TIG welding.
With the addition of the optional Wire Feed Module for
K1283-4, the SA-250 will provide constant voltage
output for running the LN-25, LN-23P or LN-7 wire
feeders. The Wire Feed Module is factory-installed on
the K1283-5 SA-250.
The SA-250 has a current range of 40-325 DC amps
with a 60% duty cycle at 250 amps/40 volts. The units
are also capable of providing 3 kVA of 115/230 volt,
60 Hertz AC auxiliary power.
DESIGN SUMMARY
Control Panel
Both the engine and the welder controls are located
on one recessed panel at the auxiliary power alterna-
tor end of the machine. The welder controls consist of
a five step “Current Range Selector” switch and a
“Fine Current Adjustment” rheostat. Each welder is
equipped with a “Start” button and an “Idler Control”
switch. The Perkins diesel uses a “Thermostart” but-
ton, and has a “Stop” control.
On this panel is also mounted an engine temperature
gauge, a battery charging ammeter, an oil pressure
gauge, and the three prong grounded type auxiliary
power receptacle.
Copper Shunt Windings
For long life and dependable operation.
Engine Idler
The SA-250 is equipped with an electronic automatic
engine idler. It automatically increases and decreases
engine speed when starting and stopping welder or
using auxiliary power. A built-in time delay permits
changing electrodes before the engine slows to its low
idle speed. The “Idler Control Switch” on the panel
locks the idler in full speed position when desired.
Auxiliary Power
3.0 kVA of nominal 115/230V, 60 Hz, AC 1 . (See
Optional Features for Power Plug Kits).
(1) Output voltage is within ± 10% at all loads up to
rated capacity.
Welder Enclosures
The complete welder is rubber mounted on a rugged
steel base.
The output terminals are placed at the side of the
machine so that they are protected by the door. The
output terminals are labeled (+) and (-).
Remote Control
K924-1 (for K1283-4, -5) (Field Installed). Provides a
receptacle switch and remote control box with 100 ft
cord for fine current and OCV adjustment at the weld-
ing site.
Cranking System
A 12 volt electric starter is standard.
Air Cleaner
Heavy duty two stage dry type.
Muffler
A muffler to reduce engine noise is standard on the
diesel engine units.
Engine Hour Meter
A meter to record the hours of operation.
Diesel Engine Protection
The system shuts the engine down in the event of
sudden low oil pressure or high coolant temperature.
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