Determining Reliability of low voltage transfer switches

The purpose of this Reliability investigation of this manufacturer's transfer switches was to create an engineering document; in which, one could find validated information on the Reliability of one of its most popular series of transfer switchgear. These numbers could then be applied to assess the Reliability of a power system in whole by system designers. The most recent published Reliability data for Automatic Transfer Switches in the IEEE STD 493 Gold Book cites MTBF as 274,853 hours for >600 Ampere models and 102,094 hours for 0 to 600 Ampere models. This analysis is intended to provide more recent and better-defined results; results that the industry can reflect upon. A reputable independent organization was contracted to perform the analysis and analyze the data.