{"id":275130,"date":"2024-10-19T18:30:01","date_gmt":"2024-10-19T18:30:01","guid":{"rendered":"https:\/\/pdfstandards.shop\/product\/uncategorized\/bs-en-60974-12012\/"},"modified":"2024-10-25T14:54:30","modified_gmt":"2024-10-25T14:54:30","slug":"bs-en-60974-12012","status":"publish","type":"product","link":"https:\/\/pdfstandards.shop\/product\/publishers\/bsi\/bs-en-60974-12012\/","title":{"rendered":"BS EN 60974-1:2012"},"content":{"rendered":"

This part of IEC 60974 is applicable to power sources for arc welding and allied processes designed for industrial and professional use, and supplied by a voltage not exceeding 1 000 V, or driven by mechanical means.<\/p>\n

This part of IEC 60974 specifies safety and performance requirements of welding power sources and plasma cutting systems.<\/p>\n

This part of IEC 60974 is not applicable to welding power sources for manual metal arc welding with limited duty operation which are designed mainly for use by laymen and designed in accordance with IEC 60974-6.<\/p>\n

This part of IEC 60974 is not applicable to testing of power sources during periodic maintenance or after repair.<\/p>\n

\n

NOTE 1 Typical allied processes are electric arc cutting and arc spraying.<\/p>\n

NOTE 2 AC systems having a nominal voltage between 100 V and 1 000 V are given in Table 1 of IEC 60038:2009.<\/p>\n

NOTE 3 This part of IEC 60974 does not include electromagnetic compatibility (EMC) requirements.<\/p>\n<\/blockquote>\n

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PDF Pages<\/th>\nPDF Title<\/th>\n<\/tr>\n
8<\/td>\nEnglish
CONTENTS <\/td>\n<\/tr>\n
13<\/td>\n1 Scope
2 Normative references <\/td>\n<\/tr>\n
14<\/td>\n3 Terms and definitions <\/td>\n<\/tr>\n
22<\/td>\n4 Environmental conditions <\/td>\n<\/tr>\n
23<\/td>\n5 Tests
5.1 Test conditions
5.2 Measuring instruments
5.3 Conformity of components <\/td>\n<\/tr>\n
24<\/td>\n5.4 Type tests
5.5 Routine tests <\/td>\n<\/tr>\n
25<\/td>\n6 Protection against electric shock
6.1 Insulation
6.1.1 General
Figures
Figure 1 \u2013 Example of insulation configuration for Class I equipment <\/td>\n<\/tr>\n
26<\/td>\n6.1.2 Clearances
Tables
Table 1 \u2013 Minimum clearances for overvoltage category III <\/td>\n<\/tr>\n
27<\/td>\n6.1.3 Creepage distances <\/td>\n<\/tr>\n
28<\/td>\nTable 2 \u2013 Minimum creepage distances <\/td>\n<\/tr>\n
29<\/td>\n6.1.4 Insulation resistance
6.1.5 Dielectric strength
Table 3 \u2013 Insulation resistance
Table 4 \u2013 Dielectric test voltages <\/td>\n<\/tr>\n
30<\/td>\n6.2 Protection against electric shock in normal service (direct contact)
6.2.1 Protection provided by the enclosure <\/td>\n<\/tr>\n
31<\/td>\n6.2.2 Capacitors
6.2.3 Automatic discharge of supply circuit capacitors <\/td>\n<\/tr>\n
32<\/td>\n6.2.4 Isolation of the welding circuit
6.2.5 Welding circuit touch current
Figure 2 \u2013 Measurement of welding circuit touch current <\/td>\n<\/tr>\n
33<\/td>\n6.2.6 Touch current in normal condition
6.3 Protection against electric shock in case of a fault condition (indirect contact)
6.3.1 Protective provisions
6.3.2 Isolation between windings of the supply circuit and the welding circuit
6.3.3 Internal conductors and connections
Table 5 \u2013 Minimum distance through insulation <\/td>\n<\/tr>\n
34<\/td>\n6.3.4 Additional requirements for plasma cutting systems
6.3.5 Movable coils and cores <\/td>\n<\/tr>\n
35<\/td>\n6.3.6 Touch current in fault condition
7 Thermal requirements
7.1 Heating test
7.1.1 Test conditions <\/td>\n<\/tr>\n
36<\/td>\n7.1.2 Tolerances of the test parameters
7.1.3 Duration of test
7.2 Temperature measurement
7.2.1 Measurement conditions
7.2.2 Surface temperature sensor <\/td>\n<\/tr>\n
37<\/td>\n7.2.3 Resistance
7.2.4 Embedded temperature sensor
7.2.5 Determination of the ambient air temperature
7.2.6 Recording of temperatures <\/td>\n<\/tr>\n
38<\/td>\n7.3 Limits of temperature rise
7.3.1 Windings, commutators and slip-rings
7.3.2 External surfaces
Table 6 \u2013 Temperature limits for windings, commutators and slip-rings <\/td>\n<\/tr>\n
39<\/td>\n7.3.3 Other components
7.4 Loading test
Table 7 \u2013 Temperature limits for external surfaces <\/td>\n<\/tr>\n
40<\/td>\n7.5 Commutators and slip-rings
8 Thermal protection
8.1 General requirements
8.2 Construction
8.3 Location
8.4 Operating capacity <\/td>\n<\/tr>\n
41<\/td>\n8.5 Operation
8.6 Resetting
8.7 Indication
9 Abnormal operation
9.1 General requirements <\/td>\n<\/tr>\n
42<\/td>\n9.2 Stalled fan test
9.3 Short circuit test
9.4 Overload test
Table 8 \u2013 Cross-section of the output short-circuit conductor <\/td>\n<\/tr>\n
43<\/td>\n10 Connection to the supply network
10.1 Supply voltage
10.2 Multi-supply voltage
10.3 Means of connection to the supply circuit <\/td>\n<\/tr>\n
44<\/td>\n10.4 Marking of terminals
10.5 Protective circuit
10.5.1 Continuity requirement <\/td>\n<\/tr>\n
45<\/td>\n10.5.2 Type test
10.5.3 Routine test
Table 9 \u2013 Current and time requirements for protective circuits
Table 10 \u2013 Minimum cross-sectional area of the external protective copper conductor <\/td>\n<\/tr>\n
46<\/td>\n10.6 Cable anchorage
Table 11 \u2013 Verification of continuity of the protective circuit <\/td>\n<\/tr>\n
47<\/td>\n10.7 Inlet openings
10.8 Supply circuit on\/off switching device
Table 12 \u2013 Pull <\/td>\n<\/tr>\n
48<\/td>\n10.9 Supply cables
10.10 Supply coupling device (attachment plug) <\/td>\n<\/tr>\n
49<\/td>\n11 Output
11.1 Rated no-load voltage
11.1.1 Rated no-load voltage for use in environments with increased riskof electric shock
11.1.2 Rated no-load voltage for use in environments without increased riskof electric shock
11.1.3 Rated no-load voltage for the use with mechanically held torches with increased protection for the operator
11.1.4 Rated no-load voltage for special processes for example plasma cutting <\/td>\n<\/tr>\n
50<\/td>\n11.1.5 Additional requirements
Table 13 \u2013 Summary of allowable rated no-load voltages <\/td>\n<\/tr>\n
51<\/td>\n11.1.6 Measuring circuits
Figure 3 \u2013 Measurement of r.m.s. values
Figure 4 \u2013 Measurement of peak values <\/td>\n<\/tr>\n
52<\/td>\n11.2 Type test values of the conventional load voltage
11.2.1 Manual metal arc welding with covered electrodes
11.2.2 Tungsten inert gas
11.2.3 Metal inert\/active gas and flux cored arc welding
11.2.4 Submerged arc welding
11.2.5 Plasma cutting
11.2.6 Plasma welding
11.2.7 Plasma gouging
11.2.8 Additional requirements
11.3 Mechanical switching devices used to adjust output <\/td>\n<\/tr>\n
53<\/td>\n11.4 Welding circuit connections
11.4.1 Protection against unintentional contact
11.4.2 Location of coupling devices
11.4.3 Outlet openings
11.4.4 Three-phase multi-operator welding transformer
11.4.5 Marking <\/td>\n<\/tr>\n
54<\/td>\n11.4.6 Connections for plasma cutting torches
11.5 Power supply to external devices connected to the welding circuit
11.6 Auxiliary power supply <\/td>\n<\/tr>\n
55<\/td>\n11.7 Welding cables
12 Control circuits
12.1 General requirement
12.2 Isolation of control circuits
12.3 Working voltages of remote control circuits
13 Hazard reducing device
13.1 General requirements <\/td>\n<\/tr>\n
56<\/td>\n13.2 Types of hazard reducing devices
13.2.1 Voltage reducing device
13.2.2 Switching device for a.c. to d.c.
13.3 Requirements for hazard reducing devices
13.3.1 Disabling the hazard reducing device
13.3.2 Interference with operation of a hazard reducing device
Table 14 \u2013 Hazard reducing device requirements <\/td>\n<\/tr>\n
57<\/td>\n13.3.3 Indication of satisfactory operation
13.3.4 Fail to a safe condition
14 Mechanical provisions
14.1 General requirements
14.2 Enclosure
14.2.1 Enclosure materials
14.2.2 Enclosure strength <\/td>\n<\/tr>\n
58<\/td>\n14.3 Handling means
14.3.1 Mechanised handling
14.3.2 Manual handling <\/td>\n<\/tr>\n
59<\/td>\n14.4 Drop withstand
14.5 Tilting stability
15 Rating plate
15.1 General requirements
15.2 Description <\/td>\n<\/tr>\n
60<\/td>\n15.3 Contents
Figure 5 \u2013 Principle of the rating plate <\/td>\n<\/tr>\n
63<\/td>\n15.4 Tolerances <\/td>\n<\/tr>\n
64<\/td>\n15.5 Direction of rotation
16 Adjustment of the output
16.1 Type of adjustment
16.2 Marking of the adjusting device
16.3 Indication of current or voltage control <\/td>\n<\/tr>\n
65<\/td>\n17 Instructions and markings
17.1 Instructions <\/td>\n<\/tr>\n
66<\/td>\n17.2 Markings <\/td>\n<\/tr>\n
67<\/td>\nAnnex A (informative) Nominal voltages of supply networks <\/td>\n<\/tr>\n
68<\/td>\nAnnex B (informative) Example of a combined dielectric test
Figure B.1 \u2013 Combined high-voltage transformers <\/td>\n<\/tr>\n
69<\/td>\nAnnex C (normative) Unbalanced load in case of a.c. tungsten inert-gas welding power sources
Figure C.1 \u2013 Voltage and current during a.c. tungsten inert-gas welding <\/td>\n<\/tr>\n
70<\/td>\nFigure C.2 \u2013 Unbalanced voltage during a.c. tungsten inert-gas welding
Figure C.3 \u2013 AC welding power source with unbalanced load <\/td>\n<\/tr>\n
71<\/td>\nAnnex D (informative) Extrapolation of temperature to time of shutdown <\/td>\n<\/tr>\n
72<\/td>\nAnnex E (normative) Construction of supply circuit terminals
Table E.1 \u2013 Range of conductor dimensions to be accepted by the supply circuit terminals <\/td>\n<\/tr>\n
74<\/td>\nAnnex F (informative) Cross-reference to non-SI units
Table F.1 \u2013 Cross-reference for mm2 to American wire gauge (AWG) <\/td>\n<\/tr>\n
75<\/td>\nAnnex G (informative) Suitability of supply network for the measurement of the true r.m.s. value of the supply current <\/td>\n<\/tr>\n
76<\/td>\nAnnex H (informative) Plotting of static characteristics <\/td>\n<\/tr>\n
77<\/td>\nAnnex I (normative) Test methods for a 10 Nm impact
Figure I.1 \u2013 Test set-up
Table I.1 \u2013 Angle of rotation \u03b8 to obtain 10\u00a0Nm impact
Table I.2 \u2013 Mass of the free fall weight and height of the free fall <\/td>\n<\/tr>\n
78<\/td>\nAnnex J (normative) Thickness of sheet metal for enclosures
Table J.1 \u2013 Minimum thickness of sheet metal for steel enclosures <\/td>\n<\/tr>\n
79<\/td>\nTable J.2 \u2013 Minimum thickness of sheet metal for enclosures of aluminium, brass or copper <\/td>\n<\/tr>\n
80<\/td>\nAnnex K (informative) Examples of rating plates
Figure K.1 \u2013 Single-phase transformer <\/td>\n<\/tr>\n
83<\/td>\nFigure K.4 \u2013 Engine-generator-rectifier <\/td>\n<\/tr>\n
85<\/td>\nAnnex L (informative) Graphical symbols for arc welding equipment <\/td>\n<\/tr>\n
86<\/td>\nTable L.1 \u2013 Letters used as symbols <\/td>\n<\/tr>\n
105<\/td>\nFigure L.1 \u2013 Input voltage power switch
Figure L.2 \u2013 Arc force control potentiometer <\/td>\n<\/tr>\n
106<\/td>\nFigure L.3 \u2013 Remote receptacle and selector switches
Figure L.4 \u2013 Terminals with inductance selector for MIG\/MAG welding
Figure L.5 \u2013 Process switch (MMA,\u00a0TIG,\u00a0MIG)
Figure L.6 \u2013 Selector switch on\u00a0AC\/DC\u00a0equipment <\/td>\n<\/tr>\n
107<\/td>\nFigure L.7 \u2013 Panel indicator lights (overheat, fault, arc striking, output voltage)
Figure L.8 \u2013 Setting pulsing parameters using digital display <\/td>\n<\/tr>\n
108<\/td>\nAnnex M (informative) Efficiency <\/td>\n<\/tr>\n
109<\/td>\nAnnex N (normative) Touch current measurement in fault condition
Figure N.1 \u2013 Measuring network for weighted touch current <\/td>\n<\/tr>\n
111<\/td>\nFigure N.2\u00a0\u2013 Diagram for touch current measurement on fault condition at operating temperature for single-phase connection of appliances other than those of class II <\/td>\n<\/tr>\n
112<\/td>\nFigure N.3\u00a0\u2013 Diagram for touch current measurement on fault condition for three-phase four-wire system connection of appliances other than those of class II <\/td>\n<\/tr>\n<\/table>\n","protected":false},"excerpt":{"rendered":"

Arc welding equipment – Welding power sources<\/b><\/p>\n\n\n\n\n
Published By<\/td>\nPublication Date<\/td>\nNumber of Pages<\/td>\n<\/tr>\n
BSI<\/b><\/a><\/td>\n2012<\/td>\n116<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n","protected":false},"featured_media":275137,"template":"","meta":{"rank_math_lock_modified_date":false,"ep_exclude_from_search":false},"product_cat":[2641],"product_tag":[],"class_list":{"0":"post-275130","1":"product","2":"type-product","3":"status-publish","4":"has-post-thumbnail","6":"product_cat-bsi","8":"first","9":"instock","10":"sold-individually","11":"shipping-taxable","12":"purchasable","13":"product-type-simple"},"_links":{"self":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product\/275130","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/types\/product"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media\/275137"}],"wp:attachment":[{"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/media?parent=275130"}],"wp:term":[{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_cat?post=275130"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/pdfstandards.shop\/wp-json\/wp\/v2\/product_tag?post=275130"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}