UL 2748
Standard for Arcing Fault Quenching Equipment

DETAILS
Edition Number:1SCC Approved:--
Edition Date:2017-09-22DOD Approved: --
Price Code:AANSI Approved: 2019-01-04
Type:ulstd

  • SCOPE

    1 Scope

    1.1 These requirements cover equipment intended to quench arcing faults by creating a lower impedance current path, located within a controlled compartment, to cause the arcing fault to transfer to the new current path.

    1.2 These requirements cover equipment that may either be completely enclosed units or intended to be installed within power distribution equipment.

    1.3 These requirements cover equipment rated up to 52 kV ac maximum.

    1.4 This standard does not include the requirements for arc detection relays and related sensors intended to detect arcing faults or devices that are intended to interrupt arcing fault currents.

    1.5 This standard does not include all the requirements for integration and testing of arc quenching equipment within equipment it is intended to protect.

    1.6 This standard does not contain requirements for investigation of the performance of an entire arc mitigation system, which would consist of arc sensors, relays, quenching equipment and other ancillary equipment necessary to form a complete system.

  • TABLE OF CONTENTS
    Expand All

    • Cover
    • Transmittal
    • Table of Contents
      • Body
        • INTRODUCTION
          • 1 Scope
          • 2 Components
          • 3 Units of Measurement
          • 4 Undated References
          • 5 Glossary
        • CONSTRUCTION
          • 6 General
          • 7 Enclosure
          • 8 Primary or Power Carrying Circuits
          • 9 Grounding
          • 10 Control and Secondary Wiring
          • 11 Creepage and Clearance Distance
          • 12 Wiring
          • 13 Operation
        • PERFORMANCE
          • 14 General
          • 15 Continuous Current Test
          • 16 Power-Frequency Withstand Voltage Tests
          • 17 Maximum Withstand Current Test
          • 18 Internal Arcing Fault Test
          • 19 Arc Transfer Test
          • 19A Mechanical Endurance
        • RATINGS
          • 20 General
        • MARKING
          • 21 General
        • INSTRUCTIONS
          • 22 General