General Description; Design Features - Lincoln Electric Red-D-Arc Welderentals D300K 3+3 SE Operator's Manual

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GENERAL DESCRIPTION

The D300K 3+3 SE 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 fea-
tures such as improved door latches and stainless
hinges.
The D300K 3+3 SE has Diesel Engine Protection. In
the event of sudden low oil pressure or high coolant
temperature, the engine immediately shuts down. The
D300K 3+3 SE has a current range of 40-325 DC
amps.
RATED OuTPuT
300A @ 32V
250A @ 30V
This unit is also capable of providing 2400W of 120
volts of 60 hertz AC auxiliary power.

DESIGN FEATuRES

Control Panel
The welder controls are located on the upper control
panel at the exciter end of the machine. The welder
controls consist of a five step "Current Range
Selector" switch and a "Fine Current Adjustment"
rheostat. The welder is equipped with a "Start" and
"Glow Plug" switch for easier cold weather starting
and a "Stop" (pull knob), located on the lower control
panel at the exciter end of the machine.
The lower control panel contains a battery charging
ammeter, GFCI and one circuit breaker for auxiliary
power. If a GFCI is tripped, See the MAINTENANCE
section for detailed information on testing and reset-
ting the GFCI.
All Copper Windings - For long life and dependable
operation.
Auxiliary Power - 2400W of nominal 120V, 60Hz,
AC. Output voltage is maintained within ± 10% at all
loads up to rated capacity.
INSTALLATION
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 exhaust outlet elbow are stan-
dard.
Engine hour Meter - A meter to record hours of oper-
ation.
DuTY CYCLE
Engine Protection - The system shuts the engine
down in the event of sudden low oil pressure or high
60%
coolant temperature.
100%
Fuel Consumption - Fuel consumption has been
optimized by means of careful design of the combus-
tion chamber, fuel feed and injection system and
cross-flow cylinder heads. In order to enhance
longevity of the engine, the engine turns at a constant
1800 RPM and no engine idler is used.
As a result, there is no waiting time for the welder to
achieve operating speed when striking an arc.
Fuel consumption figures at average operating loads
are as follows:
Tank Capacity:
Fuel Consumption:
Operating Interval:
D300K 3+3 SE
16 gallons, (60.6L) Plastic Tank.
High Idle-No Load 0.35 gallons/hr, (1.33 L/hr)
2400 watts 0.51 gallons/hr, (1.91 L/hr)
150 Amps@ 26V 0.60 gallons/hr, (2.28 L/hr)
200 Amps@ 28V 0.74 gallons/hr, (2.79 L/hr)
250 Amps@ 30V 0.91 gallons/hr, (3.44 L/hr)
300 Amps@ 32V 1.12 gallons/hr, (4.23 L/hr)
35 hours per tank
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