Installation; General Description; Design Features - Lincoln Electric SAE-300 MP Operator's Manual

SAE-300 ® MP

GENERAL DESCRIPTION

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The SAE-300 MP is a heavy duty, engine driven, DC arc weld-
ing power source, capable of providing constant current output
for stick welding or DC TIG welding and constant voltage output
for wire welding. This welder is wound with all copper coils,
rated at 300 amps/32 Volts, and provides other Classic
tures such as improved door latches and stainless hinges. The
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SAE-300 MP provides constant voltage output for running the
LN-7, LN-23P, or LN-25 wire feeders.
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The SAE-300 MP has an Electronic Engine Protection System.
In the event of sudden low oil pressure or high coolant tempera-
ture, 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 120/240 volts
of 60 cycle AC auxiliary power.
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The SAE-300 MP uses the Perkins 403F-15T Turbo Charged
diesel engine.

DESIGN FEATURES

RATED OUTPUT
250A @ 30V
300A @ 32V
Control Panel
The upper control panel is equipped with a Mode selection switch
and an "OCV Boost" switch. In CC mode, the welder controls consist
of a "Coarse Current" dial and a "Fine Current & OCV" dial located
on the upper control panel at the exciter end of the machine. In CV
mode the "Course Current" dial controls inductance & the "Fine
Current & OCV" dial becomes the wire voltage control.
The lower control panel is equipped with a "Start" button, an
"Ignition" switch, an "Idler" control switch, a "Glow Plug" button for
easier cold weather starting, a "CV Terminal" control switch and a
"Wire Feeder Volt Meter Polarity" switch. The lower control panel
also contains an engine coolant temperature gauge, an oil pressure
gauge, a fuel / hour / LED indicator gauge which has a battery
charging fault indicator and engine fault indicator built in. Auxiliary
power consists of one 20 amp, 120VAC (5-20R) duplex receptacle
with GFCI protection and one 15 amp, 240VAC (6-15R) receptacle,
protected by 2 pole, 15 Amp breaker.
A 14-pin amphenol is included for voltage and output terminal
control at wire feeder (42VAC not included). Also included is a 6-pin
amphenol to connect a remote control cable.
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fea-
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MP
DUTY CYCLE
100%
60%
A-2
All Copper Windings - For long life and dependable operation.
Engine Idler - The SAE-300
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automatic engine idler. It automatically increases and decreases
engine speed when starting and stopping welding or using auxil-
iary 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 high idle position when desired.
Auxiliary Power - 3.0 KVA of nominal 120/240V, 60Hz, AC.
Output voltage is maintained within ± 10% at all loads up to
rated capacity. (See Optional Features Section C for Power Plug
Kit.)
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 defective equipment con-
nected to it develop a ground fault. If this situation should occur, the
GFCI will trip, removing voltage from the output of the receptacle. If
a GFCI is tripped see the MAINTENANCE section for detailed infor-
mation on testing and resetting it. A GFCI should be properly tested
at least once every month.
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.

INSTALLATION

MP is equipped with an electronic