For decades, transformer protection has primarily focused on preventing catastrophic failures caused by excessive temperatures. While this remains essential, modern power distribution networks require significantly more than simple overtemperature protection. Operators increasingly need comprehensive information about the actual condition of their assets in order to improve reliability, optimize maintenance schedules, and reduce operating costs. Following the long-established TR250 temperature relay, which has been protecting transformers worldwide against overheating for decades, ZIEHL has introduced the UR series of universal monitoring relays. One of its most versatile members, the UR840IP, is already being deployed in the first transformer substations, where it transforms conventional monitoring into a comprehensive condition monitoring solution. The UR840IP…