Hypertherm MAX200 Machine Torch Plasma Arc Cutting System User Manual download pdf (Page 8)

ELECTROMAGNETIC COMPATIBILITY (EMC)

EMC INTRODUCTION

Hypertherm's CE-marked equipment is built

in compliance with standard EN50199. The

equipment should be installed and used in

accordance with the information below to

achieve electromagnetic compatibility.

The limits required by EN50199 may not be

adequate to completely eliminate interfer-

ence when the affected equipment is in

close proximity or has a high degree of

sensitivity. In such cases it may be neces-

sary 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 electro-

magnetic disturbances are detected then it

shall be the responsibility of the user to re-

solve the situation with the technical assis-

tance 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 elec-

tromagnetic 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 equip-

ment.

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 hear-

ing aids.

f. Equipment used for calibration or mea-

surement.

g. Immunity of other equipment in the en-

vironment. 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.

Earthing of Workpiece

Where the workpiece is not bonded to earth

for electrical safety, nor connected to earth

because of its size and position, for example,

ship's hull or building steelwork, a connection

bonding the workpiece to earth may reduce

emissions in some, but not all instances.

Care should be taken to prevent the earthing

of the workpiece increasing the risk of injury

to users, or damage to other electrical equip-

ment. Where necessary, the connection of

the workpiece to earth should be made by a

direct connection to the workpiece, but in

some countries where direct connection is

not permitted, the bonding should be

achieved by suitable capacitances selected

according to national regulations.

Note. The cutting circuit may or may not be

earthed for safety reasons. Changing the

earthing arrangements should only be au-

thorized by a person who is competent to

assess whether the changes will increase

the risk of injury, for example, by allowing

parallel cutting current return paths which

may damage the earth circuits of other

equipment. Further guidance is given in IEC

TC26 (sec)94 and IEC TC26/108A/CD Arc

Welding Equipment Installation and Use.

Screening and Shielding

Selective screening and shielding of other

cables and equipment in the surrounding

area may alleviate problems of interference.

Screening of the entire plasma cutting

installation may be considered for special

applications

The size of the surrounding area to be

considered will depend on the structure of

the building and other activities that are tak-

ing place. The surrounding area may extend

beyond the boundaries of the premises.

METHODS OF REDUCING EMISSIONS

Mains Supply

Cutting equipment must be connected to the

mains supply according to the manufactur-

er'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 per-

manently installed cutting equipment, in

metallic conduit or equivalent. Shielding

should be electrically continuous throughout

its length. The shielding should be connect-

ed 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 adjust-

ments covered in the manufacturer's

instructions. In particular, the spark gaps of

arc striking and stabilizing devices should

be adjusted and maintained according to

the manufacturer's recommendations.

Cutting Cables

The cutting cables should be kept as short

as possible and should be positioned close

together, running at or close to the floor

level.

Equipotential Bonding

Bonding of all metallic components in the

cutting installation and adjacent to it should

be considered. However, metallic compo-

nents bonded to the workpiece will increase

the risk that the operator could receive a

shock by touching these metallic

components and the electrode at the same

time. The operator should be insulated from

all such bonded metallic components.

Hypertherm Plasma Systems i

1 2 3 4 5 6 7 8 9 10 11 12 13 ... 186 187

Comments to this Manuals

No comments

Hypertherm MAX200 Machine Torch Plasma Arc Cutting System User Manual Page 8

Comments to this Manuals

Related products and manuals for Equipment Hypertherm MAX200 Machine Torch Plasma Arc Cutting System