UL 458
Standard for Power Converters/Inverters and Power Converter/Inverter Systems for Land Vehicles and Marine Crafts

DETAILS
Edition Number:6SCC Approved:--
Edition Date:2015-09-02DOD Approved: --
Price Code:DANSI Approved: 2015-09-02
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover fixed and stationary power converters, power-converter systems, and accessories having a rated nominal input of 120, 120/240, or 240 V, alternating current and a nominal output of 24 V or less, direct current. These converters are intended for use within land vehicles where not directly exposed to outdoor conditions, and are intended to be employed in accordance with the National Electrical Code, NFPA 70.

    1.2 These requirements also cover fixed, stationary and portable power inverters and power-inverter systems having a dc input and a 120 or 240 V ac output. These inverters are intended for use within land vehicles where not directly exposed to outdoor conditions, and are intended to be employed in accordance with the National Electrical Code, NFPA 70.

    1.3 These requirements also cover converters/inverters that are additionally intended to charge batteries.

    1.4 Power converters covered by Part i of this standard are intended for connection to established 15- and 20-A branch circuits within a recreational vehicle.

    1.5 Power-inverters covered by Part i of this standard are intended for connection to a 12- or 24-V dc battery supply.

    1.6 Converters and inverters incorporating provisions for the connection of less than three line-voltage branch circuits are investigated under the requirements in Part i of this standard.

    1.7 A power-converter or power-inverter system is intended for direct connection to a power-supply assembly. A system for connection of three or less line-voltage branch circuits, not including the main disconnect, may optionally be evaluated in accordance with the requirements in Part ii of this standard, or with the applicable requirements for a Class CTL panelboard in the Standard for Panelboards, UL 67. Power converter systems and power inverter systems also employ circuitry as described in 1.4 and 1.5.

    1.8 A power-converter or power-inverter system provided with more than three line-voltage branch circuits, not including the main disconnect, is investigated to the applicable requirements for a Class CTL panelboard in the Standard for Panelboards, UL 67.

    1.9 Converters and inverters incorporating provisions for the connection of more than three line-voltage branch circuits are judged under the requirements in Part i of this standard and the applicable requirements for a Class CTL panelboard in accordance with the Standard for Panelboards, UL 67.

    1.10 Each pole of a multiple-pole circuit breaker is a separate circuit.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • Part
          • INTRODUCTION
          • 1 Scope
          • 2 Glossary
          • 3 Components
          • 4 Units of Measurement
          • 5 Undated References
        • PART I – POWER CONVERTERS AND INVERTERS
          • CONSTRUCTION
          • 6 General
          • 7 Frame and Enclosure
          • 8 Enclosures Used For Protected Environments
          • 9 Accessibility of Uninsulated Live Parts, Film-Coated Wire, and Moving Parts
            • 9.1 General
            • 9.2 User servicing
            • 9.3 Serviceman servicing
          • 10 Assembly
          • 11 Protection Against Corrosion
          • 12 Supply Connections
            • 12.1 Permanently-connected converters or inverters
            • 12.2 Cord connection
            • 12.3 Bushings
          • 13 Low-Voltage DC Connections and Wiring
            • 13.1 General
            • 13.2 Cigarette lighter inputs
          • 14 Secondary Circuits
          • 15 Live Parts
          • 16 Internal Wiring
            • 16.1 General
            • 16.2 Tubing
            • 16.3 Protection of wiring
            • 16.4 Electrical connections
            • 16.5 Separation of circuits
            • 16.6 Barriers
          • 17 Insulating Materials
          • 18 Transformers
            • 18.1 General
            • 18.2 Coil insulation
          • 19 Resistors
          • 20 Switches and Controllers
          • 21 Overload-Protective Devices
            • 21.1 General
            • 21.2 Overcurrent-overtemperature protection
          • 22 Fuses and Fuseholders
          • 23 Receptacles
          • 24 Inverter Output Circuits
          • 25 Lampholders
          • 26 Capacitors
          • 27 Transient Voltage Surge Suppressors
          • 28 Printed Wiring
          • 29 Spacings
            • 29.1 General
            • 29.2 Insulation barriers
          • 30 Grounding
          • 31 Bonding of Internal Parts
            • 31.1 General
            • 31.2 Bonding conductor
          • PERFORMANCE
          • 32 General
          • 33 Leakage Current Test
          • 34 Power Input Test
          • 35 Output Voltage Measurement Test
          • 36 Capacitor Voltage Measurement Test
          • 37 Output Voltage and Current Test
          • 38 Temperature Test
            • 38.1 Normal
            • 38.2 Maximum output without fan operation
            • 38.3 Zero clearance
            • 38.4 Maximum overload without trip
          • 39 External Surface Temperature Limits Test
          • 40 Dielectric Voltage-Withstand Test
          • 41 Induced Potential Test
          • 42 Testing on Transformer Insulating Materials
          • 43 Strain Relief Test
          • 44 Overload Test
          • 45 Overcurrent Protection Calibration Test
          • 46 Ground-Fault Circuit-Interrupter Evaluation Test For Power Units
          • 47 Battery Charger Overcharge Test
          • 48 Abnormal Operation Test
            • 48.1 General
            • 48.2 Output short-circuit
            • 48.3 Switch position
            • 48.4 Component malfunction
            • 48.5 Rectifier and capacitor short-circuit test
            • 48.6 Vibration test
            • 48.7 Surge protectors
            • 48.8 Specific value overload
            • 48.9 Blanketing test
            • 48.10 Flanged bobbin transformer abnormal test
            • 48.11 Blocked fan
          • 49 Evaluation of Reduced Spacings on Printed Wiring Boards
            • 49.1 General
            • 49.2 Dielectric voltage-withstand test
            • 49.3 Shorted trace test
          • 50 Burnout Test
            • 50.1 General
            • 50.2 Relay and solenoid burnout
            • 50.3 Transformer burnout
          • 51 Gasket Tests
          • 52 Atomized Water Test
          • 53 Label Adhesion Test
          • MANUFACTURING AND PRODUCTION TESTS
          • 54 Dielectric Voltage-Withstand Test
          • 55 Grounding Continuity Test
          • RATING
          • 56 General
          • MARKINGS
          • 57 Details
          • 58 Content
          • INSTRUCTIONS
          • 59 Instruction Manual
        • PART II – POWER-CONVERTER SYSTEMS
          • Section
          • 60 General
          • CONSTRUCTION
          • 61 Frame and Enclosure
          • 62 Power-Supply Assembly
          • 63 Supply and Output Connections
          • 64 Overcurrent Protection
          • 65 Transfer Switch/Mechanisms
          • 66 Spacings
          • PERFORMANCE
          • 67 Temperature Test
          • MARKINGS
          • 68 Details
    • MARINE POWER CONVERTERS/INVERTERS AND POWER CONVERTER/INVERTER SYSTEMS
    • APPENDIX A