UL 60974-1
Standard for Arc Welding Equipment; Part 1: Welding Power Sources

DETAILS
Edition Number:1SCC Approved:--
Edition Date:2005-03-17DOD Approved: --
Price Code:GANSI Approved: --
Type:uliec

  • SCOPE

    1 Scope

    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 that specified in table 1 of IEC 60038, or driven by mechanical means.

    This standard is not applicable to welding power sources for manual metal arc welding with limited duty operation which are designed mainly for use by laymen.

    This part of IEC 60974 specifies safety requirements for construction and performance requirements of welding power sources and PLASMA CUTTING SYSTEMS.

    – Typical allied processes are electric arc cutting and arc spraying.

    – This standard does not include electromagnetic compatibility (EMC) requirements.

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
    • UL Preface
    • Deviations
    • IEC Foreword
    • IEC Preface
      • ARC WELDING EQUIPMENT – Part 1: Welding power sources
        • 1 Scope
        • 2 Normative references
        • 3 Definitions
        • 4 Environmental conditions
        • 5 Test conditions
          • 5.1 TYPE TESTS
          • 5.2 ROUTINE TESTS
        • 6 Protection against electric shock
          • 6.1 Insulation
          • 6.2 Protection against electric shock in normal service (direct contact)
          • 6.3 Protection against electric shock in case of a fault condition (indirect contact)
        • 7 Thermal requirements
          • 7.1 Heating test
          • 7.2 Temperature measurement
          • 7.3 Limits of TEMPERATURE RISE
          • 7.4 Loading test
          • 7.5 Commutators and slip-rings
        • 8 Abnormal operation
          • 8.1 Stalled fan
          • 8.2 Short circuit
          • 8.3 Overload
        • 9 THERMAL PROTECTION
          • 9.1 Construction
          • 9.2 Location
          • 9.3 Operation
          • 9.4 Resetting
          • 9.5 Operating capacity
          • 9.6 Indication
        • 10 Connection to the input supply
          • 10.1 Supply voltage
          • 10.2 Power supply
          • 10.3 Means of connection
          • 10.4 Input supply terminals
          • 10.5 Cable anchorage
          • 10.6 Inlet openings
          • 10.7 Input supply on/off switching device
          • 10.8 Supply cables
          • 10.9 Supply coupling device (attachment plug)
        • 11 Output
          • 11.1 RATED NO-LOAD VOLTAGE (U)
          • 11.2 TYPE TEST values of the CONVENTIONAL LOAD VOLTAGE
          • 11.3 Mechanical switching devices used to adjust output
          • 11.4 Output connections
          • 11.5 Power supply to external devices
          • 11.6 Auxiliary power output
        • 12 CONTROL CIRCUITS
        • 13 HAZARD REDUCING DEVICE
          • 13.1 VOLTAGE REDUCING DEVICE
          • 13.2 Switching device for a.c. to d.c.
          • 13.3 Connection of a HAZARD REDUCING DEVICE
          • 13.4 Interference with operation of a HAZARD REDUCING DEVICE
          • 13.5 Indication of satisfactory operation
          • 13.6 Fail to a safe condition
        • 14 Mechanical requirements
          • 14.1 Enclosure
          • 14.2 Impact resistance of handles, push buttons etc.
          • 14.3 Handling means
          • 14.4 Drop withstand
          • 14.5 Tilting stability
        • 15 Rating plate
          • 15.1 Description
          • 15.2 Contents
          • 15.3 Tolerances
          • 15.4 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
        • 17 Instructions and markings
          • 17.1 Instructions
          • 17.2 Markings
          • 17.3 Addition for PLASMA CUTTING POWER SOURCES
    • Annex A(informative)Nominal voltages of supply systems (see and )
    • Annex B(informative)Example of a combined dielectric test (see )
    • Annex C(normative)Unbalanced load in case of a.c. tungsten inert-gas welding power sources (see )
    • Annex D(informative)Extrapolation of temperature to time of shutdown (see )
    • Annex E(normative)Construction of input supply terminals (see )
    • Annex F(informative)Cross-reference to non-SI units
    • Annex G(informative)Suitability of input supply for the measurement of the true r.m.s. value of the supply current(see )
    • Annex H(informative)Plotting of STATIC CHARACTERISTICS (see )
    • Annex I(normative)Methods of a 10 Nm impact test (see )
    • Annex J(normative)Thickness of sheet metal for enclosures (see )
    • Annex K(informative)Examples of rating plates (see )