Warning, Installation, Input electrical connections – Lincoln Electric IDEALARC CV-300 User Manual

Page 10

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A-3

INSTALLATION

IDEALARC CV-300

A-3

INPUT ELECTRICAL CONNECTIONS

All input power must be electrically
disconnected before proceeding.

____________________________________

Before starting the installation, check with the local
power company to determine if there is any ques-
tion about whether your power supply is adequate
for the voltage, amperes, phase, and frequency
specified on the welder nameplate. Have a quali-
fied electrician connect the input leads to L1, L2,
and L3 on the input reconnect panel in compliance
with the National Electrical Code, all local codes,
and the connection diagram located on the inside
of the Right Case Side Panel. This welder can
operate on a three-phase AC voltage supply only.

Models that have multiple input voltages specified
on the nameplate (e.g., 208/230) are shipped con-
nected for the highest voltage. If the welder is to
be operated at a lower voltage, it must be recon-
nected according to the instructions on the inside
of the removable Right Case Side Panel. See the
Reconnect Section of this manual for details on
reconnecting the machine to operate at different
voltages.

Be sure the voltage, phase, and frequency of the
input power is as specified on the machine rating
plate. See Figure A.2 for the location of the
machine's input cord entry and Reconnect Panel.

Access to the input reconnect panel is achieved by
removing the Right Case Side Panel of the CV-300
on the ON/OFF POWER SWITCH side of the
machine.

The frame of the welder must be grounded. A
ground terminal marked with the symbol ( ) is
located at the bottom of the input box to ground the
welder. See the National Electrical Code for
details on proper grounding methods.

FIGURE A.2 - Input Power Cable Entry Connections
and Reconnect Panel location.

FUSE AND WIRE SIZES

Protect the input circuit with the super lag fuses or
delay type circuit breakers listed on the

Technical

Specifications page of this manual for the machine
being used. Delay type circuit breakers may be used.
The tripping action of delay type circuit breakers
decreases as the magnitude of the current increases.
They are also called inverse time or thermal/magnetic
circuit breakers.

DO NOT use fuses or circuit breakers with a lower amp
rating than recommended. This can result in "nui-
sance" tripping caused by inrush current even when
machine is not being used for welding at high output
currents.

Use input and grounding wire sizes that meet local
electrical codes or see the

Technical Specifications

page in this manual.