UL 2748A PDF

1 Scope

1.1 These requirements cover fast operating devices intended to interrupt currents associated with arcing faults, having interrupting times faster than conventional overcurrent devices.

1.2 These requirements cover open type devices that are intended to be installed within power distribution equipment.

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

1.4 This standard does not include the requirements for sensors intended to detect arcing faults, devices intended to trigger the functioning of the arc interrupting device, or devices intended to quench arcing faults by transferring the arcing fault to a lower impedance path.

1.5 This standard does not include requirements for integration and testing of arcing fault interrupting devices within equipment it is intended to protect.

Summary of Topics

This revision of ANSI/UL 2748A dated October 28, 2021 is being issued to update the title page to reflect the most recent designation as a Reaffirmed American National Standard (ANS). No technical changes have been made.