Hypertherm powermax1250, Руководство оператора

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ELECTROMAGNETIC COMPATIBILITY (EMC)
8-06
Hypertherm
Plasma Systems i
EMC Introduction
Hypertherm’s CE-marked equipment is built in
compliance with standard EN60974-10. The
equipment should be installed and used in
accordance with the information below to achieve
electromagnetic compatibility.
The limits required by EN60974-10 may not be
adequate to completely eliminate interference
when the affected equipment is in close proximity
or has a high degree of sensitivity. In such cases
it may be necessary to use other measures to
further reduce interference.
This plasma equipment is designed for use only in
an industrial environment.
Installation and use
The user is responsible for installing and using
the plasma equipment according to the
manufacturer’s instructions. If electromagnetic
disturbances are detected then it shall be the
responsibility of the user to resolve the situation
with the technical assistance of the manufacturer.
In some cases this remedial action may be as
simple as earthing the cutting circuit, see
Earthing of Workpiece. In other cases it could
involve constructing an electromagnetic screen
enclosing the power source and the work
complete with associated input filters. In all cases
electromagnetic disturbances must be reduced to
the point where they are no longer troublesome.
Assessment of area
Before installing the equipment the user shall
make an assessment of potential electromagnetic
problems in the surrounding area. The following
shall be taken into account:
a. Other supply cables, control cables, signalling
and telephone cables; above, below and
adjacent to the cutting equipment.
b. Radio and television transmitters and
receivers.
c. Computer and other control equipment.
d. Safety critical equipment, for example guarding
of industrial equipment.
e. Health of the people around, for example the
use of pacemakers and hearing aids.
f. Equipment used for calibration or
measurement.
g. Immunity of other equipment in the
environment. User shall ensure that other
equipment being used in the environment is
compatible. This may require additional
protection measures.
h. Time of day that cutting or other activities are
to be carried out.
The size of the surrounding area to be considered
will depend on the structure of the building and
other activities that are taking place. The
surrounding area may extend beyond the bound-
aries of the premises.
Methods of reducing emissions
Mains supply
Cutting equipment must be connected to the
mains supply according to the manufacturer’s
recommendations. If interference occurs, it may
be necessary to take additional precautions such
as filtering of the mains supply. Consideration
should be given to shielding the supply cable of
permanently installed cutting equipment, in
metallic conduit or equivalent. Shielding should
be electrically continuous throughout its length.
The shielding should be connected to the cutting
mains supply so that good electrical contact is
maintained between the conduit and the cutting
power source enclosure.
Maintenance of cutting equipment
The cutting equipment must be routinely
maintained according to the manufacturer’s
recommendations. All access and service doors
and covers should be closed and properly
fastened when the cutting equipment is in
operation. The cutting equipment should not be
modified in any way except for those changes and
adjustments covered in the manufacturer’s