Hypertherm HRT - Manual (Page 5)

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Compliance Information EMC-1
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 be low 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 sen sitivity.
In such cases it may be nec essary to use other
mea sures to further reduce interference.
This cutting equipment is designed for use only
in an in dus tri al 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 equip ment.
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 surround ing 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
ELECTROMAGNETIC COMPATIBILITY (EMC)