Asset health indices for equipment in existing substations

Satisfactory performance of substation equipment is critical for any utility company. During their service life such assets transition from new to being aged by having one or more developing failure modes, and if left unattended eventually reaching the point of failure itself. The need is then to have the capability to identify the time frames for these transition stages. TB 858 describes Asset Health Index (AHI) methodologies for all significant asset types. These AHIs should be the first step towards focused outcomes. Firstly, they can be used to create asset specific plans for maintenance, refurbishment and asset replacement. Secondly, they can provide resilience information on a functional basis through a network. Each is part of the asset management credo that all assets should have…