UL 2748A BULLETIN UL Standard for Safety Outline of Investigation for Arcing Fault Interrupting Devices - COMMENTS DUE: February 24, 2017
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Underwriters’ Laboratories
Standard for Safety Outline of Investigation for Arcing Fault Interrupting Devices - COMMENTS DUE: February 24, 2017
N 2748A BULLETIN
Annotation
These requirements cover fast operating devices intended to interrupt currents associated with arcing faults, having interrupting times faster than conventional overcurrent devices.
These requirements cover open type devices that are intended to be installed within power distribution equipment.
These requirements cover devices rated up to 38 kV ac maximum.
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 arc to a lower impedance path.
This standard does not include requirements for integration and testing of arcing fault interrupting devices within equipment it is intended to protect.
Автоматический перевод:
Стандарт UL для безопасной схемы расследования для устройств прерывания дугового замыкания - COMMENTS DUE: 24 февраля 2017
Эти требования покрывают быстрые управляющие устройства, предназначенные для прерывания токов, связанных с дуговыми замыканиями, имея прерывание времен быстрее, чем обычные устройства сверхтока.
