IEC 60974-5:2007
(Main)Arc welding equipment - Part 5: Wire feeders
Arc welding equipment - Part 5: Wire feeders
Specifies safety and performance requirements for industrial and professional equipment used in arc welding and allied processes to feed filler wire. The wire feeder may be a stand-alone unit which may be connected to a separate welding power source or one where the welding power source and the wire feeder are housed in a single enclosure. This new edition takes into account changes induced by the publication of the third edition of IEC 60974-1 as well as technical improvements and clarifications.
Matériel de soudage à l'arc - Partie 5: Dévidoirs
Spécifie les exigences de sécurité et de performance pour le matériel utilisé en soudage à l'arc et les techniques connexes pour l'alimentation en fil d'apport. Le dévidoir peut être une unité indépendante pouvant être raccordée à une source de courant de soudage séparée ou une unité intégrant la source de courant de soudage et le dévidoir dans une enveloppe unique. Cette nouvelle édition tient compte des modifications induites par la publication de la troisième édition de la CEI 60974-1, ainsi que d'améliorations et clarifications techniques.
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Standards Content (Sample)
IEC 60974-5
Edition 2.0 2007-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Arc welding equipment –
Part 5: Wire feeders
Matériel de soudage à l’arc –
Partie 5: Dévidoirs
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IEC 60974-5
Edition 2.0 2007-11
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
Arc welding equipment –
Part 5: Wire feeders
Matériel de soudage à l’arc –
Partie 5: Dévidoirs
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
PRICE CODE
INTERNATIONALE
R
CODE PRIX
ICS 25.160 ISBN 2-8318-9390-9
– 2 – 60974-5 © IEC:2007
CONTENTS
FOREWORD.4
1 Scope.6
2 Normative references .6
3 Terms and definitions .6
4 Environmental conditions.7
5 Tests .7
5.1 Test conditions.7
5.2 Measuring instruments .8
5.3 Conformity of components.8
5.4 Type tests .8
5.5 Routine tests .8
6 Protection against electric shock .8
6.1 Insulation .8
6.2 Protection against electric shock in normal service (direct contact) .8
6.2.1 Protection provided by the enclosure.8
6.2.2 Capacitors .9
6.2.3 Automatic discharge of input capacitors.9
6.3 Protection against electric shock in case of a fault condition (indirect contact) .9
6.3.1 Isolation of the supply circuit and the welding circuit.9
6.3.2 Isolation of the welding circuit from the frame.9
6.3.3 Internal conductors and connections.10
6.4 Rated supply voltage.10
6.5 Protective provisions .10
6.6 Overcurrent protection of the supply circuit .10
6.7 Cable anchorage .10
6.8 Auxiliary power output .10
6.9 Inlet opening .10
6.10 Control circuits .11
6.11 Insulation of hanging means.11
7 Liquid cooling system .11
8 Shielding gas supply .11
9 Thermal requirements.11
10 Mechanical provisions .12
10.1 Wire feeder .12
10.2 Enclosure strength .12
10.3 Handling means .12
10.4 Drop withstand .12
10.5 Tilting stability .12
10.6 Filler wire supply .13
10.6.1 Filler wire supply mounting .13
10.6.2 Wire spool retaining device.13
10.6.3 Filler wire over-run .13
10.7 Feeding.13
10.8 Protection against mechanical hazards.13
11 Rating plate.14
60974-5 © IEC:2007 – 3 –
11.1 General .14
11.2 Description.14
11.3 Contents .15
12 Indication of wire-feed speed.15
13 Instructions and markings.16
13.1 Instructions .16
13.2 Markings .16
Annex A (normative) Determination of the variation in wire-feed speed.18
Annex B (informative) Example for a rating plate of a stand-alone wire feeder .20
Figure 1 – Principle of the rating plate of stand-alone wire feeder .15
Table 1 – Minimum degree of protection .9
– 4 – 60974-5 © IEC:2007
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
ARC WELDING EQUIPMENT –
Part 5: Wire feeders
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote
international co-operation on all questions concerning standardization in the electrical and electronic fields. To
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2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
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3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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between any IEC Publication and the corresponding national or regional publication shall be clearly indicated in
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5) IEC provides no marking procedure to indicate its approval and cannot be rendered responsible for any
equipment declared to be in conformity with an IEC Publication.
6) All users should ensure that they have the latest edition of this publication.
7) No liability shall attach to IEC or its directors, employees, servants or agents including individual experts and
members of its technical committees and IEC National Committees for any personal injury, property damage or
other damage of any nature whatsoever, whether direct or indirect, or for costs (including legal fees) and
expenses arising out of the publication, use of, or reliance upon, this IEC Publication or any other IEC
Publications.
8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this IEC Publication may be the subject of
patent rights. IEC shall not be held responsible for identifying any or all such patent rights.
International Standard IEC 60974-5 has been prepared by IEC technical committee 26:
Electric welding.
This second edition cancels and replaces the first edition published in 2002 and constitutes a
technical revision.
This edition includes the following significant technical changes with respect to the previous
edition:
– changes induced by the publication of IEC 60974-1, edition 3;
– IEC 60974-5 is not applicable to spool-on torches that IEC 60974-7 covers (see Clause 1);
– IEC 60974-5 is not applicable to wire feeders which are designed for use by laymen that
IEC 60974-6 covers (see Clause 1);
– wire feeders with degree of protection IP23S may be stored, but are not intended to be
used outside during precipitation unless sheltered (see 6.2.1 and Table 1);
– withdrawal of voltage limitation for input supply network (see 6.4);
– protective connection provision for welding circuit (see 6.5);
60974-5 © IEC:2007 – 5 –
– addition of tilting stability (see 10.5);
– clarification of the definition of the thermal requirement test. The manufacturer gives the
maximum load (see Clause 9);
– introduction of rating plate layout for stand-alone wire feeder (see 11.2);
– introduction of new combined symbols for liquid/gas input and output based on IEC
60974-1 (see 13.2).
The text of this standard is based on the following documents:
FDIS Report on voting
26/364/FDIS 26/368/RVD
Full information on the voting for the approval of this standard can be found in the report on
voting indicated in the above table.
This publication has been drafted in accordance with the ISO/IEC Directives, Part 3.
This standard shall be used in conjunction with IEC 60974-1 and IEC 60974-7.
The list of all the parts of IEC 60974, under the general title Arc welding equipment, can be
found on the IEC web site.
The committee has decided that the contents of this publication will remain unchanged until
the maintenance result date indicated on the IEC web site under "http://webstore.iec.ch" in
the data related to the specific publication. At this date, the publication will be
• reconfirmed;
• withdrawn;
• replaced by a revised edition, or
• amended.
– 6 – 60974-5 © IEC:2007
ARC WELDING EQUIPMENT –
Part 5: Wire feeders
1 Scope
This part of IEC 60974 specifies safety and performance requirements for industrial and
professional equipment used in arc welding and allied processes to feed filler wire.
The wire feeder may be a stand-alone unit which may be connected to a separate welding
power source or one where the welding power source and the wire feeder are housed in a
single enclosure.
The wire feeder may be suitable for manually or mechanically guided torches.
This part of IEC 60974 is not applicable to spool-on torches that are covered by IEC 60974-7.
This part of IEC 60974 is not applicable to wire feeders which are designed for use by laymen
and are covered by IEC 60974-6.
NOTE 1 Typical allied processes are, for example, plasma arc cutting and arc spraying.
NOTE 2 This standard does not include electromagnetic compatibility (EMC) requirements.
2 Normative references
The following referenced documents are indispensable for the application of this document.
For dated references, only the edition cited applies. For undated references, the latest edition
of the referenced document (including any amendments) applies.
IEC 60050-195, International Electrotechnical Vocabulary (IEV) – Part 195: Earthing and
protection against electric shock
IEC 60529:1989, Degrees of protection provided by enclosures (IP Code)
IEC 60974-1:2005, Arc welding equipment – Part 1: Welding power sources
IEC 60974-7, Arc welding equipment – Part 7: Torches
IEC 60974-10, Arc welding equipment – Part 10: Electromagnetic compatibility (EMC)
requirements
3 Terms and definitions
For the purposes of this document, the terms and definitions of IEC 60050(195), IEC 60974-1,
and IEC 60974-7, as well as the following, apply.
3.1
crushing zone
place or area in which the human body or parts of the human body are exposed to a crushing
hazard
NOTE This hazard will be generated, if two movable parts are moving towards each other or one movable part is
moving towards a fixed part.
60974-5 © IEC:2007 – 7 –
3.2
drive rolls
rolls in contact with the filler wire and which transfer mechanical power to the filler wire
3.3
filler wire
filler metal in the form of a coil of wire
3.4
filler wire supply
source of filler wire and means for dispensing filler wire to the feeding mechanism
3.5
liner
component of the cable hose assembly through which the filler wire is fed
3.6
maximum load
value of the mechanical load that produces the rated supply current over the rated speed
range
3.7
rated speed range
speed range of the filler wire specified by the manufacturer for each rated size of filler wire
3.8
rated supply current
I
r.m.s. value of an input current to the wire feeder at maximum load
3.9
wire electrode
solid or tubular filler wire which conducts welding current
3.10
wire-feed control
electrical or mechanical apparatus, or both, which control(s) the speed of the filler wire, the
sequence of operations and other services as required
NOTE The wire feed control may be integral with the wire feeder or in a separate enclosure.
3.11
wire feeder
equipment that delivers filler wire to the arc or weld zone which includes the wire-feed control
and means to apply motion to the filler wire and may also include the filler wire supply
4 Environmental conditions
See Clause 4 of IEC 60974-1.
5 Tests
5.1 Test conditions
As specified in 5.1 of IEC 60974-1.
– 8 – 60974-5 © IEC:2007
5.2 Measuring instruments
As specified in 5.2 of IEC 60974-1.
5.3 Conformity of components
As specified in 5.3 of IEC 60974-1.
5.4 Type tests
All type tests given below shall be carried out on the same wire feeder.
As a condition of conformity the type tests given below shall be carried out in the following
sequence:
a) visual inspection (see 3.7 of IEC 60974-1);
b) insulation resistance (see 6.1.4 of IEC 60974-1 (preliminary check));
c) enclosure (see 14.2 of IEC 60974-1);
d) handling means (see 10.3);
e) drop withstand (see 10.4);
f) protection provided by the enclosure (see 6.2.1);
g) insulation resistance (see 6.1.4 of IEC 60974-1);
h) dielectric strength (see 6.1.5 of IEC 60974-1);
i) visual inspection (see 3.7 of IEC 60974-1).
The other tests included in this standard and not listed here may be carried out in any
convenient sequence.
5.5 Routine tests
All routine tests given below shall be carried out on each wire feeder in the following
sequence:
a) visual inspection (see 3.7 of IEC 60974-1);
b) continuity of the protective circuit, if applicable (see 10.4.2 of IEC 60974-1);
c) dielectric strength (see 6.1.5 of IEC 60974-1);
d) visual inspection (see 3.7 of IEC 60974-1).
6 Protection against electric shock
6.1 Insulation
See 6.1 of IEC 60974-1.
6.2 Protection against electric shock in normal service (direct contact)
6.2.1 Protection provided by the enclosure
The minimum degree of protection for wire feeders shall be in accordance with Table 1.
60974-5 © IEC:2007 – 9 –
Table 1 – Minimum degree of protection
Designed for Designed for
Component
indoor use outdoor use
Motor and control supplied by a voltage ≤ SELV IP2X IP23S
Motor and control supplied by a voltage > SELV IP21S IP23S
Live parts at welding potential for wire feeders used
with manually guided torches (for example, filler IPXX IPX3
wire, wire spool, drive rolls)
Live parts at welding potential for wire feeders used
with mechanically guided torches (for example, filler IPXX IPXX
wire, wire spool, drive rolls)
NOTE See also 10.8.
Wire feeders with degree of protection IP23S may be stored but are not intended to be used
outside during precipitation unless sheltered.
Adequate drainage shall be provided by the enclosure. Retained water shall not interfere with
the correct operation of the equipment or impair safety.
Conformity shall be checked as specified in IEC 60529.
For this test, the filler wire shall be fed into the drive system and all external connectors shall
be connected or covered.
The degree of water protection is met if, immediately after this test, the dielectric strength is
verified as specified in 6.2.1 of IEC 60974-1.
When live parts at welding potential are protected against precipitation, the filler wire shall
show no visual wetness after the test.
6.2.2 Capacitors
See 6.2.2 of IEC 60974-1.
6.2.3 Automatic discharge of input capacitors
See 6.2.3 of IEC 60974-1.
6.3 Protection against electric shock in case of a fault condition (indirect contact)
6.3.1 Isolation of the supply circuit and the welding circuit
See 6.3.2 of IEC 60974-1.
NOTE Only one reinforced or double insulation between the welding circuit and the mains is required.
6.3.2 Isolation of the welding circuit from the frame
Live parts at welding potential (for example, filler wire, wire spool, drive rolls) shall be isolated
from the wire feeder frame or other structure to which they are attached by basic insulation
(see Tables 1 and 2 of IEC 60974-1).
Conformity shall be checked as specified in 6.1 of IEC 60974-1.
– 10 – 60974-5 © IEC:2007
6.3.3 Internal conductors and connections
See 6.3.4 of IEC 60974-1.
6.4 Rated supply voltage
The rated supply voltage shall be supplied from a welding power source as specified in 11.5
of IEC 60974-1 or from the input supply network provided that 6.5 is met.
6.5 Protective provisions
Connection of exposed conductive parts to the protective conductor is not required if the rated
supply voltage is supplied by the welding circuit or SELV.
Connection of exposed conductive parts to the protective conductor is required if the wire
feeder is rated for supply voltages above SELV. The protective conductor connection shall be
secured to the frame or enclosure by a screw or fastening that shall not require removal
during any servicing operation. Solder alone shall not be used for securing the protective
conductor terminals.
The welding circuit and conductive parts connected to the welding circuit shall not be
connected to the protective conductor.
Where a protective conductor is used, it shall be protected against damage by stray welding
currents, for example, by a device to sense welding current in the protective earth conductor
under a fault condition and to de-energize the welding circuit or by insulation of the relevant
metal parts, for example, by an enclosure.
Conformity shall be checked by visual inspection and performing the following fault
simulations:
a) applying a current not greater than the rated current value of the protective conductor;
b) passing the maximum rated welding current through the protective conductor without
damage.
6.6 Overcurrent protection of the supply circuit
Internal wiring shall be protected by an overcurrent protective device such as a fuse or circuit-
breaker.
If a wire feeder is designed for use with a specific welding power source, the overcurrent
protective device may be within the welding power source.
Conformity shall be checked by visual inspection.
6.7 Cable anchorage
The supply cable anchorage of wire feeders which are supplied by a voltage in excess of
safety extra low voltage (SELV) shall meet 10.5 of IEC 60974-1, except for those powered
from the welding circuit.
6.8 Auxiliary power output
See 11.6 of IEC 60974-1.
6.9 Inlet opening
See 10.6 of IEC 60974-1.
60974-5 © IEC:2007 – 11 –
6.10 Control circuits
See Clause 12 of IEC 60974-1.
6.11 Insulation of hanging means
If an attachment is provided for hanging the wire feeder during welding, the attachment shall
be electrically insulated from the wire feeder enclosure.
A warning in the instructions shall be given that, if an alternative method of support is used,
insulation should be provided between the wire feeder enclosure and the support.
Conformity shall be checked by visual inspection.
7 Liquid cooling system
Component parts of wire feeders, through which cooling liquid flows, shall be capable of
operating at an inlet pressure up to 0,5 MPa (5 bar) and with a coolant temperature up to
70 °C without leaking.
Conformity shall be checked by measurement and visual inspection while applying 0,75 MPa
(7,5 bar) for 30 s.
8 Shielding gas supply
Component parts of wire feeders, through which shielding gas flows and which are under
pressure when the gas valve is closed, shall be capable of operating at an inlet pressure up
to 0,5 MPa (5 bar) without leaking. In the case where multiple valves are used, they shall be
tested independently.
Conformity shall be checked by visual inspection while blocking the gas valve and applying an
inlet pressure of 0,75 MPa (7,5 bar) for 30 s.
9 Thermal requirements
Wire feeders designed for use with manual torches shall be capable of operating under
maximum load at 60 % duty cycle (6 min “on” and 4 min “off”) without causing any component
to exceed its rated temperature.
Where a wire feeder and a power source are housed in a single enclosure, the wire feeder
shall be capable of operating under maximum load at the duty cycle corresponding to the
rated maximum welding current of the power source.
Wire feeders designed for use with mechanically guided torches shall be capable of operating
under maximum load at 100 % duty cycle without causing any component to exceed its rated
temperature.
For liquid-cooled apparatus, the test shall be carried out with the minimum flow and the
maximum temperature of the coolant, as recommended by the manufacturer.
Additionally, the wire feeder shall meet the requirements specified above, when it is cycled for
4 s “on” and 2 s “off” during the 6 min “on” time of the duty cycle specified above.
Current-carrying components, incorporated in the wire feeder, shall be capable of carrying the
rated welding current
– 12 – 60974-5 © IEC:2007
a) without exceeding the temperature rating of the current-carrying components;
and
b) without causing the surface temperatures, specified in Table 7 of IEC 60974-1, to be
exceeded.
Conformity shall be checked by measurement in accordance with 7.2 of IEC 60974-1 with the
wire feeder loaded to the maximum load specified by the manufacturer.
10 Mechanical provisions
10.1 Wire feeder
A wire feeder shall be so constructed and assembled that it has the strength and rigidity
necessary to withstand the normal service to which it is likely to be subjected, without
increasing the hazard of electric shock or other hazard, whilst maintaining the minimum
clearances required, and shall provide protection against hazardous moving parts (such as
belts, pulleys, fans, gears, etc.).
After the tests in accordance with 10.1 to 10.4, the wire feeder shall comply with the
provisions of this standard. Some deformation of the structural parts or enclosure is permitted
provided this does not increase a hazard.
Accessible parts shall have no sharp edges, rough surfaces or protruding parts likely to cause
injury.
Conformity shall be checked by visual inspection after meeting the requirements of 10.1 to
10.7.
10.2 Enclosure strength
See 14.2 of IEC 60974-1.
10.3 Handling means
See 14.3 of IEC 60974-1.
The conformity shall be checked with the wire feeder fitted with the maximum weight of filler
wire for which the wire feeder is designed, and no other accessories shall be attached.
10.4 Drop withstand
See 14.4 of IEC 60974-1.
The conformity shall be checked with the wire feeder fitted with the maximum weight of the
filler wire for which the wire feeder is designed, and no other accessories shall be attached.
Wire feeders intended for permanent mounting, for example, on mechanized equipment, need
not be tested.
10.5 Tilting stability
See 14.5 of IEC 60974-1.
60974-5 © IEC:2007 – 13 –
10.6 Filler wire supply
10.6.1 Filler wire supply mounting
The filler wire supply mounting shall have the strength and rigidity necessary to support the
maximum weight of the filler wire, as recommended by the manufacturer.
Conformity shall be checked by visual inspection and meeting the requirements of 10.4.
10.6.2 Wire spool retaining device
The retaining device for the wire spool shall be so designed that, during normal rotation,
starts and stops, the retaining device shall not come loose or allow the wire spool to fall off its
mounting.
Conformity shall be checked by visual inspection after the following test.
The filler wire supply is fitted with the maximum weight of filler wire recommended by the
manufacturer. The wire feeder is positioned at a 15° angle to the horizontal in such a direction
as to produce the maximum loading on the wire spool retaining device. The wire feeder is
operated at the maximum speed with 100 starts and stops. No loosening of the retaining
device shall be observed.
10.6.3 Filler wire over-run
A device shall limit filler wire over-run from the wire spool, during its normal rotation, starting
and stopping, and the minimum clearances as specified in Table 1 of IEC 60974-1 shall be
maintained.
Conformity shall be checked by measurement during the test of 10.7.
10.7 Feeding
The wire feeder shall be capable of feeding filler wire through a torch, as specified by the
manufacturer. The maximum load is determined under the test condition described below.
Conformity shall be checked by the following test with critical type and size of filler wire and
the wire spool, as specified by the manufacturer.
Wire-feed speed is measured (by tachometer or measurement of wire length for a measured
time) at the minimum and the maximum control setting under the following conditions.
a) The cable hose assembly, when used, shall be positioned so as to have a 0,3 m radius
loop beginning at the wire feeder. If the conduit is long enough to form one complete loop,
any remaining length shall be straight.
10.6.3.
b) The filler wire over-run device shall be adjusted in accordance with
c) All components, for example, wire straighteners, tips, liners, etc. are in place, adjusted
and in the condition in which they are normally supplied for welding.
Conformity is met if the wire feeds and the measured speed at the minimum control setting is
equal to, or less than, the minimum of the rated speed range and the measured speed at the
maximum control setting is equal to, or greater than, the maximum of the rated speed range.
10.8 Protection against mechanical hazards
The wire feeder shall provide protection against
a) unintentional hazardous contact with moving parts (i.e. drive rolls, gears) during operation;
– 14 – 60974-5 © IEC:2007
NOTE Contact with a moving part is not necessarily a hazard.
EXAMPLE 1 Protection can be achieved by design of the wire feeder gear or recessing the part behind the
plane of access or use of a hinged cover or protective guard.
b) crushing of parts of the human body during
1) threading of the filler wire into the feeder;
EXAMPLE 2 Protection can be achieved by
– using a low speed for threading the filler wire;
– a momentary jog of the filler wire that remains only as long as a switch is actuated (hold-to-run control);
– a wire-feed mechanism designed to thread the filler wire into the drive system without having to switch on
the drive motor.
2) operation of the wire spool;
EXAMPLE 3
Protection can be achieved by designing an enclosure for the wire spool with the instruction that the wire
feeder shall be operated with the enclosure in place.
Protection of an unenclosed wire spool to avoid crushing the fingers between the frame and the wire spool can
be achieved by including
– a maximum distance between frame and wire spool not to exceed 6 mm;
– a minimum distance between frame and wire spool of at least 30 mm;
– deterring devices, for example, deflector, to avoid a pinch point (distance between frame and wire spool
smaller than 30 mm).
Conformity shall be checked by visual inspection.
11 Rating plate
11.1 General
A clearly and indelibly marked rating plate shall be fixed securely to, or printed on, each
stand-alone wire feeder.
Conformity shall be checked by visual inspection and the durability test specified in 15.1 of
IEC 60974-1.
11.2 Description
The rating plate shall be divided into two sections:
a) identification of stand-alone wire feeder;
b) energy input of stand-alone wire feeder.
The arrangement and sequence of the data shall comply with the principle shown in Figure 1
(for an example, see Annex B).
The dimensions of the rating plate are not specified and may be chosen freely.
NOTE Additional information may be given, if necessary, on a special rating plate. Further useful information may
be given in technical literature supplied by the manufacturer (see Clause 13).
60974-5 © IEC:2007 – 15 –
a) Identification
1)
2) 3)
4)
b) Energy input
5) 6) 7)
8) 9)
IEC 2217/07
Figure 1 – Principle of the rating plate of stand-alone wire feeder
11.3 Contents
a) Identification
Box 1 Name and address of the manufacturer and if required distributor, importer, a
trade mark and the country of origin.
Box 2 Type (identification) as given by the manufacturer.
Box 3 Traceability of design and manufacturing data (for example, serial number).
Box 4 Reference to IEC 60974-5 confirming that the wire feeder complies with its
requirements.
b) Energy input
Box 5 Symbol for input supply (see 6.4).
Box 6 U Rated supply voltage(s) and frequency.
Box 7 I Rated supply current(s) at maximum load.
Box 8 IP Degree of protection for motor and control.
Box 9 I Rated welding current at 100 % (continuous load) or 60 % duty cycle
or both. This rating is applicable if the wire feeder is a part of the
welding circuit.
12 Indication of wire-feed speed
Where an indication of wire-feed speed is given in m/min, or optionally in inch/min, the
accuracy of the indication shall be
a) between 100 % and 25 % of the maximum setting: ±10 % of the true value;
b) below 25 % of the maximum setting: ±2,5 % of the maximum setting.
When other data are given for the maximum variation of the wire-feed speed with respect to
load, to supply voltage and to temperature rise, they are determined according to Annex A.
Conformity shall be checked by measurement and calculation over the range of adjustment,
using the conditions specified in 10.7.
– 16 – 60974-5 © IEC:2007
13 Instructions and markings
13.1 Instructions
The instructions delivered with each wire feeder shall include the following, as applicable:
a) general description;
b) correct methods of handling;
c) meanings of indications, markings and graphical symbols;
d) interface requirements for the arc welding power source, for example, control power,
control signals, static characteristics and means of connection;
e) size, and type of wire spools;
f) maximum and minimum diameter, maximum weight of filler wire, maximum load;
g) rated speed range;
h) maximum gas pressure, i.e. 0,5 MPa (5 bar);
i) correct operational use of the wire feeder, for example, wire diameter, wire type, drive
rolls and torch specification;
j) welding capability, limitations of duty and explanation of thermal protection;
k) limitations of use relating to the degree of protection provided;
l) maintenance of the wire feeder, such as recommended cycles for partial and complete
test and other operation (for example cleaning);
m) adequate circuit diagram together with a list of recommended spare parts;
n) precautions against toppling over, if the wire feeder shall be placed on a tilted plane;
o) basic guidelines regarding protection against mechanical hazards for operators, for
example, not to wear gloves during threading the filler wire and changing the wire spool;
p) EMC classification in accordance with IEC 60974-10 (stand-alone wire feeder only).
Other useful information may be given, for example, class of insulation, pollution degree, how
to connect to computer control systems, etc.
Conformity shall be checked by reading the instructions.
13.2 Markings
The inlet and outlet connections for the cooling liquid and the shielding gas shall be clearly
and indelibly marked with the following symbols.
a) Liquid inlet
Alternatively a colour code may be used.
b) Liquid outlet
Alternatively a colour code may be used.
60974-5 © IEC:2007 – 17 –
c) Gas inlet
d) Gas outlet
– 18 – 60974-5 © IEC:2007
Annex A
(normative)
Determination of the variation in wire-feed speed
A.1 With respect to load change
The variation in wire-feed speed within the rated speed setting, when the load is varied from
half of the maximum load to the maximum load, is determined by the following formula:
v v
−
l1 l2
= × 100 (%)
r
l
v
l2
where
r is the variation in wire-feed speed due to load change (%);
l
v is the wire-feed speed at half of the maximum load (m/min);
l1
v is the wire-feed speed at maximum load (m/min).
l2
The wire feeder shall be operated for at least 0,5 h at half the maximum load before making
this test.
The maximum value of the variation r is taken.
l
A.2 With respect to supply voltage change
The variation in wire-feed speed throughout all loads within the rated speed setting, when the
supply voltage is varied within ±10 % of the rated supply voltage, is determined by the
following formula:
v v
−
U1 U2
= × 100 (%)
r
U
v
U2
where
r is the variation in wire-feed speed due to supply voltage change (%);
U
v is the wire-feed speed at ±10 % of the rated supply voltage (m/min);
U1
v is the wire-feed speed at rated supply voltage (m/min).
U2
The wire feeder shall be operated for at least 0,5 h at half the maximum load before making
this test.
The maximum value of the variation r is taken.
U
A.3 With respect to temperature rise
The variation in wire-feed speed at maximum load within the rated speed setting, due to the
temperature rise from ambient air temperature to operating temperature, is determined by
the following formula:
v − v
t1 t2
= × 100 (%)
r
t
v
t2
60974-5 © IEC:2007 – 19 –
where
r is the variation in wire-feed speed due to temperature rise (%);
t
v is the wire-feed speed at ambient air temperature (m/min);
t1
v is the wire-feed speed at operating temperature (m/min).
t2
The ambient air temperature shall be stated and maintained within a tolerance of ±5 °C.
The maximum value of the variation r is taken.
t
– 20 – 60974-5 © IEC:2007
Annex B
(informative)
Example for a rating plate of a stand-alone wire feeder
a) Identification
1)
Manufacturer
Trademark
Address
2) 3)
Type Serial No.
4)
IEC 60974-5
b) Energy input
6) 7)
5)
U = 42 V / 1~ 50 Hz I = 2 A
1 1
8) 9)
IP 23S I = 500 A (60 %) / 400 A (100 %)
______________
– 22 – 60974-5 © CEI:2007
SOMMAIRE
AVANT-PROPOS.24
1 Domaine d’application .26
2 Références normatives.26
3 Termes et définitions .26
4 Conditions ambiantes .27
5 Essais .28
5.1 Conditions d’essais .28
5.2 Instruments de mesure.28
5.3 Conformité des composants .28
5.4 Essais de type.28
5.5 Essais individuels de série .28
6 Protection contre les chocs électriques.28
6.1 Isolement .
...
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