Electromagnetic Compatibility (EMC)
Spirit200a User’s Manual Rev J
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Appendix A Electromagnetic
Compatibility (EMC)
Background
The 380V 50/60Hz and 415V 50/60Hz CE marked Spirit200a plasma
cutting systems are manufactured to comply with the European standard
EN 60974-10 (Electromagnetic compatibility (EMC) – Product standard for
arc welding equipment). The system has been tested in accordance with
CISPR 11, EMC classification – Group 2 ISM (Class A).
The limits used in this standard are based on practical experience.
However, the ability of plasma cutting equipment to work in a compatible
manner with other radio and electronic systems is greatly influenced by
the manner in which it is installed and used. For this reason, it is
important that the plasma cutting equipment be installed and used in
accordance with the information below if electromagnetic compatibility is
to be achieved.
Plasma cutting equipment is primarily intended for use in an industrial
environment. There may be potential difficulties in ensuring
electromagnetic compatibility in other environments.
Installation and Use
The user is responsible for installing and using the plasma cutting
equipment according to the manufacturer’s instructions. If
electromagnetic disturbances are detected then it shall be the
responsibility of the user of the plasma cutting equipment to resolve the
situation with the technical assistance of the manufacturer. In some cases
this remedial action may be as simple as earthing the plasma cutting
circuit, see Note. In other cases it could involve constructing an
electromagnetic screen enclosing the plasma power source and the work,
complete with associated input filters. In all cases, electromagnetic
disturbances shall be reduced to the point where they are no longer
troublesome.
Note: The plasma cutting circuit may or may not be earthed for safety
reasons. Changing the earthing arrangements should only be authorized
by a person who is competent to assess whether the changes will
increase the risk of injury, e.g. by allowing parallel plasma cutting current
return paths which may damage the earth circuits of other equipment.
Further guidance is given in IEC 974-13
Arc welding equipment –
Installation and use.
