Century INVERTER ARC 120, Operator'S Manual

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A-2
INSTALLATION INVERTER ARC 120
INPUT CONNECTIONS
Ground­Connection
The frame of the welder must be grounded. A
ground terminal marked with the symbol is located
on the under panel for this purpose. See your local
and national electrical codes for proper grounding
methods.
A grounding conductor is supplied
in the input cord, it is important
that the supply receptacle ground
is connected.
• The welding power source supply cable
is provided with a green or
yellow/green wire that must ALWAYS be earthed. This
green or yellow/green wire must NEVER be used with
other voltage conductors.
• Only install plugs that conform with safety regulations.
Input­Power­Connection
Check the input voltage, phase, and frequency supplied to this
machine before turning it on. The allowable input voltage is
indicated in the technical specification section of this manual and
on the rating plate of the machine. Be sure that the machine is
grounded.
Make sure the power available at the input connection is adequate
for normal operation of the machine. The fuse rating and cable
sizes are both indicated in the technical specification section of
this manual.
Fuse the input circuit with time delay fuses marked “D” or delay
type
(1)
circuit breakers. Using fuses or circuit breakers smaller
than recommended may result in “nuisance” shut-offs from
welder inrush currents even if not welding at high currents.
(1) Also called “inverse time” or “thermal/magnetic” circuit breakers. These
circuit breakers have a delay in tripping action that decreases as the mag-
nitude of the current increases.
The Inverter Arc 120 is recommended for use on an individual
branch circuit.
120v INPUT
The INVERTER ARC™ 120 is provided with a 120V cable,
6.0ft.(1.8m) in length, with a 15Amp 5-15P plug molded onto the
cord.
The rated output of the INVERTER ARC™ 120 is available when
connected to a 20A branch circuit. When connected to a branch
circuit with lower ampacity, lower welding current and duty cycle
must be used. An output guide is provided below. The values are
approximate and must be adjusted downward if the fuse or circuit
breaker trips off. Other loads on the circuit and fuse/circuit
breaker characteristics will affect the available output. Do not
exceed these welding conditions: (See Table A.1)
TAble­A.1
OUTPUT CONNECTIONS
A quick disconnect system using Twist-Mate™ cable plugs is
used for the welding cable connections.
ELECTRIC SHOCK can kill.
• Keep the electrode holder and cable
insulation in good condition.
• Do not touch electrically live parts or
electrode with skin or wet clothing.
• Insulate yourself from work and ground.
• Turn the input line Switch on the AUTOPRO™ 90S “off”
before connecting or disconnecting output cables or
other equipment.
Stick­Welding­(SMAW)
Connect the electrode cable to the (+) terminal and the work
clamp to the (-) terminal. Insert the connector with the key lining
up with the keyway and rotate approximately 1/4 turn clockwise.
Do not over tighten.
(See Figure A.1)
FIGuRe­A.1
WARNING
WARNING
Electrode Holder
Work Cable
Positive “+”
Negative “–”
Work Clamp
BRANCH CIRCUITS
120V Input Output Current
PLUG RATING
BRANCH
RATING
20% DUTY
CYCLE
10% DUTY
CYCLE
15 AMP 15 AMP 55A 60A
15 AMP 20 AMP 70A 80A