BS EN 62135-1:2015:2016 Edition
$215.11
Resistance welding equipment – Safety requirements for design, manufacture and installation
| Published By | Publication Date | Number of Pages |
| BSI | 2016 | 74 |
This part of IEC 62135 applies to equipment for resistance welding and allied processes and includes single and multiple welding stations which may be manually or automatically loaded and/or started.
This part of IEC 62135 covers stationary and portable equipment.
This part of IEC 62135 specifies electrical safety requirements for design, manufacture and installation. It does not cover all non-electrical safety requirements (e.g. noise, vibration).
This part of IEC 62135 does not include electromagnetic compatibility (EMC) requirements, which are included in IEC 62135-2.
To comply with this standard, all safety risks involved in loading, feeding, operating and unloading the equipment, where applicable, should be assessed and the requirements of related standards should be observed.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 4 | European foreword Endorsement notice |
| 6 | Annex ZA (normative) Normative references to international publications with their corresponding European publications |
| 8 | CONTENTS |
| 12 | FOREWORD |
| 14 | 1 Scope 2 Normative references |
| 15 | 3 Terms and definitions |
| 17 | 4 Environmental conditions 5 Tests 5.1 Test condition 5.2 Measuring instruments |
| 18 | 5.3 Type tests 5.4 Routine tests 6 Protection against electric shock 6.1 General |
| 19 | 6.2 Insulation 6.2.1 General 6.2.2 Clearances Tables Table 1 – Minimum clearances for overvoltage category III |
| 20 | 6.2.3 Creepage distances |
| 21 | Table 2 – Minimum creepage distances |
| 22 | 6.2.4 Insulation resistance 6.2.5 Dielectric strength Table 3 – Insulation resistance |
| 23 | Table 4 – Dielectric test voltages |
| 24 | 6.2.6 Welding circuit touch current 6.2.7 Liquid cooling Figures Figure 1 – Measurement of welding circuit touch current |
| 25 | 6.3 Protection against electric shock in normal service (direct contact) 6.3.1 General 6.3.2 Rated no-load voltage at the output Figure 2 – Measurement of rms values |
| 26 | 6.3.3 Protection provided by barriers or the enclosure |
| 27 | 6.3.4 Capacitors 6.3.5 Automatic discharge of input capacitors |
| 28 | 6.3.6 Protective conductor current under normal condition 6.3.7 Touch current in normal condition 6.4 Protection against electric shock in case of a fault condition (indirect contact) 6.4.1 General |
| 30 | 6.4.2 Protective provisions for welding circuit |
| 31 | Table 5 – Minimum distance through insulation |
| 32 | Figure 3 – Example of metal screen between windings of the supply circuit and the welding circuit |
| 33 | Figure 4 – Example of protective conductor connected directly to the welding circuit (single-spot, a.c. current equipment) Figure 5 – Example of protective conductor connected directly to welding circuits (multi-spot, a.c. current equipment) |
| 34 | Figure 6 – Example of protective conductor connected directly to welding circuits (medium-frequency equipment) |
| 35 | Figure 7 – Example of protective conductor connected to welding circuits through impedances |
| 36 | Figure 8 – Example of protective conductor connected to welding circuits through auto-inductances Figure 9 – Example of protective conductor connected to welding circuits through auto-inductances |
| 37 | Figure 10 – Example of current operated RCD (a.c. current equipment) |
| 38 | Figure 11 – Example of current operated RCD (medium-frequency equipment) |
| 39 | Figure 12 – Example of current operated residual current device and voltage relay |
| 40 | Figure 13 – Example of current operated residual current device and safety-voltage relay |
| 41 | Figure 14 – Example of safety voltage relay |
| 42 | 6.4.3 Internal conductors and connections 6.4.4 Touch current in fault condition |
| 43 | 6.4.5 DC resistance welding equipment operating at mains frequency 6.4.6 DC resistance welding equipment operating at medium frequency 6.4.7 Continuity of the protective bonding circuit Table 6 – Continuity of the protective bonding circuit |
| 44 | 6.5 Additional user requirements 6.6 Supply voltage 6.7 Conductors of the welding circuit 7 Thermal requirements 7.1 Heating test 7.1.1 Test conditions |
| 45 | 7.1.2 Tolerances of the test parameters |
| 46 | 7.1.3 Beginning of the heating test 7.1.4 Duration of the test 7.2 Temperature measurement 7.2.1 Measurements conditions 7.2.2 Surface temperature sensor 7.2.3 Resistance |
| 47 | 7.2.4 Embedded temperature sensor 7.2.5 Determination of the ambient temperature (ta) 7.2.6 Determination of cooling liquid temperature (ta) 7.2.7 Recording of temperatures |
| 48 | 7.3 Limits of temperature rise 7.3.1 Windings 7.3.2 External surfaces Table 7 – Limits of temperature rise for windings |
| 49 | Table 8 – Limits of temperature rise for external surfaces of hand-held equipment Table 9 – Limits of temperature rise for external surfaces of hand-guided equipment Table 10 – Limits of temperature rise for external surfaces of fixed equipment |
| 50 | 7.3.3 Other components 7.4 Protection from thermal hazards in normal service (direct contact) 7.4.1 General 7.4.2 Identification of hot surfaces |
| 51 | 7.4.3 Protection provided by insulation or other barriers 7.4.4 Protection provided by supplemental cooling 8 Abnormal operation 8.1 General requirements 8.2 Stalled fan test 8.3 Cooling system failure |
| 52 | 8.4 Overload test 9 Provisions against mechanical hazards 9.1 General 9.2 Risk analysis 9.2.1 General 9.2.2 Ready-to-use equipment as in delivery state 9.2.3 Equipment not ready to use as in delivery state |
| 53 | 9.2.4 Equipment not ready for use and designed to be incorporated in more complex equipment 9.3 Measures 9.3.1 Minimum measures 9.3.2 Additional measures |
| 54 | 9.4 Conformity of components 9.5 Starting for manual operated equipment |
| 55 | 10 Instructions and markings 10.1 Instructions 10.2 Markings 10.3 Marking of terminals |
| 57 | Annexes Annex A (informative) Nominal voltages of supply networks |
| 58 | Annex B (normative) Construction of supply circuit terminals B.1 Size of terminals B.2 Spacings between supply circuit terminals Table B.1 – Range of conductor dimensions to be accepted by the supply circuit terminals |
| 59 | B.3 Connections at the terminals B.4 Construction of the terminals B.5 Fixing of the terminals Table B.2 – Spacing between supply circuit terminals |
| 60 | Annex C (normative) Touch current measurement in fault condition Figure C.1 – Measuring network for weighted touch current |
| 61 | Figure C.2 – Diagram for touch current measurement on fault condition at operating temperature for single-phase connection of appliances other than those of class II Figure C.3 – Diagram for touch current measurement on fault condition for three-phase four-wire system connection of appliances other than those of class II |
| 62 | Annex D (informative) Extrapolation of temperature to time of shutdown |
| 63 | Annex E (informative) Example of risk analysis and safety level requirement E.1 General E.2 Monitored hazards E.3 General measures E.4 Typical hazards by type of equipment E.4.1 General |
| 64 | E.4.2 Spot welding Figure E.1 – Structure of a mounted machine Figure E.2 – Structure of a hand-held welding gun |
| 65 | E.4.3 Projection welding Figure E.3 – Structure of projection welding machinery |
| 66 | E.4.5 Butt welding Figure E.4 – Structure of seam welding machinery Figure E.5 – Structure of butt welding machinery |
| 67 | Annex F (informative) Indirect contact protection in resistance welding equipment F.1 Protection against indirect contact by automatic disconnection of the supply F.1.1 General F.1.2 TN system Figure F.1 – Principle illustration of insulation fault |
| 68 | F.1.3 TT systems Figure F.2 – Illustrations of TN systems |
| 69 | F.2 Automatic disconnection of supply in single phase a.c. current equipment F.2.1 TN system Figure F.3 – Illustrations of TT systems |
| 70 | F.2.2 TT systems F.3 Automatic disconnection of supply in d.c. current equipment operating at medium frequency (inverter equipment) F.3.1 TN system |
| 71 | F.3.2 TT systems Figure F.4 – Typical fault current |
| 73 | Figure F.5 – Time-to-voltage reference curve |
| 74 | Bibliography |
