Surge-Protective devices (SPD) applied in low-voltage ac power circuits should be provided with appropriate means to disconnect a failed SPD from the power system and provide a clear indication of the SPD status. This objective has not been consistently applied by manufacturers, as shown by an informal survey of off-the-shelf devices. More specific and clear standards are needed to overcome the present ambiguity.
Citation: Power Quality Assurance Journal (publ. Intertech Intl., Inc.)-9
Pub Type: Journals
circuit-breakers, failure modes, fuses, surge protective devices, Underwriters Laboratories