Installation; General Description; Design Features - Lincoln Electric GENUINE SAE-300 Service Manual

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GENERAL DESCRIPTION

The SAE-300 ® is a heavy duty, engine driven, DC arc
welding power source, capable of providing constant
current output for stick welding or DC TIG welding. This
welder is wound with all copper coils, rated at 300
amps/32 Volts and provides other Classic
such as improved door latches and stainless hinges.
With the addition of the optional K623-1 Wire Feed
Module ™ , the SAE-300
will provide constant voltage
®
output for running the LN-7, LN-23P, or LN-25 wire
feeders. (The Wire Feed Module is factory installed on
the K1643-8). The optional K924-5 Remote Control Kit,
provides a remote control rheostat for remote fine cur-
rent and open circuit voltage adjustment. See Section
C for description.
The SAE-300 has an Electronic Engine Protection
®
System. In the event of sudden low oil pressure or high
coolant temperature, the engine immediately shuts
down. The SAE-300 ® has a current range of 40-350
DC amps with output ratings as follows:
These units are also capable of providing 3 KVA of
115/230 volts of 60 cycle AC auxiliary power.
The SAE-300 uses the Perkins 404D-22 industrial
®
water-cooled diesel engine.
RATED OUTPUT
250A @ 30V
300A @ 32V

DESIGN FEATURES

CONTROL PANEL
The welder controls consist of a "Course Current
Control" Reactor and a "Fine Current Adjustment"
rheostat located on the upper control panel at the
exciter end of the machine. The lower control panel
welder is equipped with a "Start" button, an "Ignition"
switch, an "Idler" control switch and a "Glow Plug" but-
ton for easier cold weather starting.
The lower control panel also contains an engine tem-
perature gauge, a battery charging ammeter, an oil
pressure gauge, for auxiliary power there is one 20
amp, 120VAC (5-20R) duplex receptacle with GFCI
protection and one 15 amp, 250VAC (6-15R) recepta-
cle, protected by 2 pole, 15 Amp breaker.
The lower control panel also has a remote/local switch
and a twist-lock receptacle (NEMA L14-20R) for the
optional Constant Current remote control unit (K924-
4).
All Copper Windings - For long life and dependable
operation.

INSTALLATION

Engine Idler - The SAE-300
electronic automatic engine idler.
increases and decreases engine speed when starting
and stopping welding or using auxiliary power.
A built-in time delay permits changing electrodes
before the engine slows to its low idle speed.
features
®
The "Idler" control switch on the panel locks the idler in
high idle position when desired.
Auxiliary Power - 3.0 kVA of nominal 115/230V, 60Hz,
AC. Output voltage is maintained within ± 10% at all
loads up to rated capacity. (See Optional Features
Section C for Power Plug Kit.)
GFCI - Protects the 20 amp, 120V duplex receptacle.
See the Maintenance Section for detailed information
on testing and resetting of the GFCI.
120 V DUPLEx RECEPTACLE AND GFCI
A GFCI protects the 120V auxiliary power receptacle.
A GFCI (Ground Fault Circuit Interrupter) is a device to
protect against electric shock should a piece of defec-
tive equipment connected to it develop a ground fault.
If this situation should occur, the GFCI will trip, remov-
ing voltage from the output of the receptacle. If a GFCI
is tripped see the MAINTENANCE section for detailed
DUTY CYCLE
information on testing and resetting it. A GFCI should
be properly tested at least once every month.
100%
60%
The 120 V auxiliary power receptacle should only be
used with three wire grounded type plugs or approved
double insulated tools with two wire plugs. The current
rating of any plug used with the system must be at
least equal to the current capacity of the associated
receptacle.
Welder Enclosure - The complete welder is rubber
mounted on a rugged steel "C" channel base.
The output terminals are placed at the side of the
machines so that they are protected by the door. The
output terminals are labeled (+) and (-).
Cranking System - A 12 volt electric starter is stan-
dard.
Air Cleaner - Heavy duty two stage dry type.
Muffler - A muffler and stainless steel exhaust outlet
elbow are standard.
Engine Hour Meter - A meter to record hours of oper-
ation.
Engine Protection - The system shuts the engine
down in the event of sudden low oil pressure or high
coolant temperature. A warning light on the control
panel will indicate such a fault. To reset the engine for
restarting, turn the ignition switch off then on.
SAE-300 ®
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is equipped with an
®
It automatically