The Guide provides direction in the selection of monitoring and the diagnostic parameters used for power circuit breakers. It provides guidance on appropriate parameters for various circuit breaker technologies. To guide owners, manufacturers and third parties in selection of key circuit breaker parameters to be monitored. This information will help the industry reduce failures, minimize maintenance and improve future designs with the application of appropriate monitoring. New IEEE Standard - Superseded. This IEEE Standards product is part of the C37 family on Switchgear, Substations and Protective Relays. Direction is provided for the selection of monitoring and for diagnostic parameters to be used with high-voltage circuit breakers (i.e., above 100 V). Guidance on appropriate parameters to be considered for monitoring applied to various circuit breaker technologies is also provided.