Lincoln Electric IM675 RED-D-ARC E300 - Manual (Page 11)

B-1 OPERATION
RED-D-ARC E300
B-1
GENERAL DESCRIPTION
The E300 is a single phase constant current arc weld-
ing power source available in a DC output model only.
Designed for stick welding, it may also be used for
TIG welding when used with the K930-1 Tig Module.
A 15 amp 115 volt AC, Auxiliary Power duplex recep-
tacle, with circuit breaker protection is provided.
RECOMMENDED PROCESSES AND
EQUIPMENT
DC Constant Current Welding
TIG Welding
The K930-1 Tig Module can be used with this
machine to provide high frequency stabilization and a
gas valve for TIG welding. It operates on 115V 50/60
Hz power. A water valve (for water cooled TIG torch-
es) is available as an option.
DESIGN FEATURES
• Power On/Off switch.
• Continuous current control dials with exact welding
current needed for each job. Settings are precise
and free from creep.
• Spring loaded knob on the continuous current
control crank pulls out for easy adjustment and
snaps back out of the way when released.
• Recessed front panel protects controls.
• Large safety margins and protective circuits protect
rectifiers from transient voltages and high currents.
• Submersion dipping of assembled transformer and
choke in special sealing/insulating material gives
extra protection against moisture and corrosive
atmosphere.
• Outstanding Arc Stability - Transformer design pro-
vides pop-out-resistant welding.
• Reconnect panel is provided to permit changing
from one input voltage to another without reconnect-
ing transformer leads.
• Auxiliary Power-15 amps at 115 VAC
Be sure the E300 is properly installed, and that all
accessories are properly hooked up before attempting
operation.
DUTY CYCLE (WELD)
This machine is rated at a 30% duty cycle at 250
amps or 50% duty cycle at 200 amp output. Duty
cycle is based on a 10 minute period. Therefore,
the welder can be loaded at 200 amperes for 5
minutes out of each 10 minute period. Higher duty
cycles can be used at lower currents; see rating
plate information.
AUXILIARY POWER
• One 15 amp 115 VAC grounding duplex receptacle
is standard. Also provided is a receptacle cover and a
15 amp circuit breaker for Auxiliary circuit protection.
CONTROL OPERATION
• Current Control Handle
Rotating the hand wheel raises and lowers the
output current allowing the operator to dial the
desired current. Clockwise rotation reduces the
current while counter-clockwise rotation increases
the current. Turning the current control handle
also drives the output pointer at the bottom of the
nameplate which indicates the stick welding cur-
rent at NEMA arc volts.
• TIG Welding
The E300 with the optional Tig Module is an inex-
pensive equipment combination for part-time pro-
duction or repair TIG welding of aluminum, mag-
nesium, thin stainless steel and many space-age
metals. The E300 can be used for normal stick
electrode welding with the Tig Module attached.
The Tig Module includes high frequency genera-
tor, gas valve and needed controls. It operates
on 115V, 60 Hz AC power.
NOTE: Installation instructions are in the kit. (When
using the E300 with any other high frequency equip-
ment, an R.F. bypass capacitor must be installed.
Order Kit T12246.) To provide protection, the welder
grounding stud or frame must be connected to ground
(see instructions on grounding in Machine Installation
section). Also follow the grounding instructions given
in the Tig Module Instruction manual.
DC 40-250 Amps
DUTY CYCLE OUTPUT AMPS
100% 140 Amps
50% 200 Amps
30% 250 Amps
20% 300 Amps