A classification system of liquid-filled distribution transformer types, risk exposures, outage impacts, unusual service conditions, and installation locations to help guide users in determining what monitoring parameters might be useful in achieving the goal of safe and continuous power delivery to customers is provided by this guide. Guidance on device installation, communications, and alert types is also provided by this guide.

This guide covers identification of the key measurable parameters that can be monitored for obtaining an indication of the condition of liquid-immersed distribution transformers.