a heejungbyun@suwon.ac.kr, b sshon@suwon.ac.kr (Corresponding) Abstract. In modern cities, power distribution systems are very complicated systems consisted of 3-phase lines, 3-phase transformers, electric poles, etc. and those facilities are distributed among lots of buildings, roads, and trees. Tracing technology of transformers and wires is a challenging issue. Power line carrier communication is applied to trace transformers and wires in power distribution systems. Power transformer and

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... s have only a limited ability to carry higher frequencies. A new wire tracing system is proposed to utilize its limited propagation characteristics. The wire and transformer tracing system is designed and implemented based on a client-server with power line carrier communication function. Some simulation and experiments are conducted to understand and verify the theoretical concepts and practical characteristics.