UL 1062
Standard for Unit Substations

DETAILS
Edition Number:3SCC Approved:--
Edition Date:1997-01-29DOD Approved: --
Price Code:DANSI Approved: 2014-06-11
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover unit substations of 1000 kVA single phase and 3000 kVA 3-phase maximum having a maximum nominal primary or secondary rating of 600 volts. Their construction, installation, and use are intended to be in accordance with the National Electrical Code, ANSI/NFPA 70.

    1.2 Deleted August 1, 2001

  • TABLE OF CONTENTS
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    • Cover
    • Transmittal
    • Table of Contents
    • UL Foreword
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 General
            • 2.1 Components
            • 2.2 Units of measurement
            • 2.3 Undated references
          • 3 Glossary
        • CONSTRUCTION
          • 4 General
          • 5 Materials
          • 6 Rust and Corrosion Resistance
          • 7 Mechanical Assembly
          • 8 Framework and Enclosure
            • 8.1 Frame
            • 8.2 Enclosure
            • 8.3 Sheet metal
            • 8.4 Specific environmental conditions
            • 8.5 Type 3R enclosures
            • 8.5A Type 3RX enclosures
            • 8.6 Components mounted on doors and covers
            • 8.7 Ventilation – general
            • 8.8 Ventilation – panelboard section
            • 8.9 Ventilation – transformer section
          • 9 Doors and Covers
            • 9.1 General
            • 9.2 Flanges for metallic enclosures
            • 9.3 Fastenings
            • 9.4 Butt hinges
            • 9.5 Piano hinges
            • 9.6 Latches
          • 10 Dead Front Construction
          • 11 Filler Plates
          • 12 Wiring Space
            • 12.1 General
            • 12.2 Wire bending space
            • 12.3 Clear wiring space
            • 12.4 Restricting barriers
            • 12.5 Bushings
            • 12.6 Screw and rivet heads
          • 13 Insulating Materials
          • 14 Coil Insulation
          • 15 Current-Carrying Parts
            • 15.1 General
            • 15.2 Plating
            • 15.3 Bus bars
            • 15.4 Wiring
          • 16 Wiring Terminals
          • 17 Service Equipment Use
          • 18 Disconnecting Means
            • 18.1 General
            • 18.2 Ground fault protection
            • 18.3 Neutral disconnecting means
          • 19 Overcurrent Protection
          • 20 Switching Means
          • 21 Spacings
            • 21.1 General
            • 21.2 Insulating barriers
          • 22 Grounding and Bonding
            • 22.1 General
            • 22.2 Equipment grounding terminals
        • PERFORMANCE
          • 23 General
          • 24 Impedance Test
          • 25 Temperature Test
            • 25.1 General
            • 25.2 Direct loading method
            • 25.3 Load back method
            • 25.4 Impedance kVA method – 3-phase transformer
            • 25.5 Units for wall mounting
            • 25.6 Units for floor mounting
            • 25.7 Dielectric voltage-withstand
          • 26 Rain Test
          • 27 Dielectric Voltage-Withstand Test
            • 27.1 Applied potential
            • 27.2 Induced potential
            • 27.3 Clamped joint
            • 27.4 Barriers
          • 28 Overload Test
          • 29 Dielectric Voltage-Withstand Test Repeated
          • 30 Coating Thickness Test
          • 31 Compression Test
          • 32 Deflection Test
          • 33 Strength Test of Insulating Base and Support
          • 34 Lifting Hook or Bracket Test
          • 35 Wall-Mounting Means Test
        • TESTS BY THE MANUFACTURER
          • 36 Dielectric Voltage-Withstand Test
          • 37 Ground Fault Protection Test
          • 38 Bonding Resistance Test
        • RATINGS
          • 39 General
        • MARKINGS
          • 40 General
            • 40.1 Location
            • 40.2 Letter height
            • 40.3 Identification
            • 40.4 Ratings
            • 40.5 Phase identification
            • 40.6 Overcurrent protection
            • 40.7 Service equipment
            • 40.8 Neutral
            • 40.9 Ground fault protection
            • 40.10 Switching devices
            • 40.11 Field installed units
            • 40.12 Terminals
            • 40.13 Transformers
            • 40.14 Mountings
            • 40.15 Environmental types
            • 40.16 Type 3R and 3RX enclosures
            • 40.17 Field wiring
            • 40.18 Weight
          • 41 Permanence of Marking
        • INSTALLATION INSTRUCTIONS
          • 42 Conduit Location Instructions
          • 43 Field Testing of Ground Fault Protection of Equipment
    • APPENDIX A