Installation, Safety precautions, Select suitable location – Lincoln Electric PRO-CUT 55 SVM140-A User Manual

Page 9: High frequency interference protection, Warning

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Read this entire installation section before you
start installation.

SAFETY PRECAUTIONS

ELECTRIC SHOCK can kill.

• Turn the input power OFF at the

disconnect switch or fuse box
and discharge input capacitors
before working inside the equip-
ment.

• Do not touch electrically hot parts or electrodes with

your skin or wet clothing.

• Always connect the 55 grounding terminal (located

on the side of the Case Back Assembly) to a good
electrical earth ground.

• Always wear dry, insulating gloves.

• Turn the 55 Power Switch OFF when connecting

power cord to input power.

Only qualified personnel should install, use, or ser-
vice this equipment.

SELECT SUITABLE LOCATION

Place the Pro-Cut 55 where clean cool air can freely
circulate in through the rear louvers and out through
the front/bottom opening. Dirt, dust or any foreign
material that can be drawn into the machine should be
kept at a minimum. Failure to observe these precau-
tions can result in excessive operating temperatures
and nuisance shutdown of the machine.

A source of clean, dry air or nitrogen must be supplied
to the Pro-Cut 55. Oil in the air is a severe problem and
must be avoided. The supply pressure must be
between 80 and 150 psi. The flow rate is approximate-
ly 6.0 cfm (170 l/min.). Failure to observe these pre-
cautions could result in excessive operating tempera-
tures or damage to the torch.

STACKING

The Pro-Cut 55 cannot be stacked.

LIFTING AND MOVING

FALLING EQUIPMENT can cause
injury.

• Do not use the pull handle on the

optional undercarriage, if installed,
to lift the machine. This handle is
not designed to support the full
weight of the machine. Using it to
lift the machine could cause per-
sonal injury or damage to the
machine.

• Either the front or rear handles or both may be used

to lift or move the machine.

TILTING

The Pro-Cut 55 must be placed on a stable, level sur-
face so it will not topple over.

HIGH FREQUENCY INTERFERENCE
PROTECTION

The Pro-Cut 55 employs a touch start mechanism for
arc initiation. This eliminates high frequency emissions
from the machine as compared with spark gap and
solid state type high frequency generators. Keep in
mind, though, that these machines may be used in an
environment where other high frequency generating
machines are operating. By taking the following steps,
you can minimize high frequency interference.

• Make sure the power supply chassis is connected to

a good earth ground. The work terminal ground does
NOT ground the machine frame.

• Keep the work ground clamp isolated from other work

clamps that have high frequency.

• If the ground clamp cannot be isolated, then keep the

clamp as far as possible from other work clamp con-
nections.

• When the machine is enclosed in a metal building,

several good earth driven electrical grounds around
the periphery of the building are recommended.

Failure to observe these recommended installation
procedures may cause improper function of the Pro-
Cut or possibly even damage the control system or
power supply components.

INSTALLATION

A-4

PRO-CUT 55