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This paper presents the development of a power line carrier in low distribution automation system (DAS) for operating and controlling low voltage (LV) down stream of 415/240V. Supervisory Control and Data Acquisition (SCADA) based Remote Terminal Unit (RTU) along power line communication (PLC) system are used for DAS development that practically simulates the down stream distribution system functions in an automated manner. It is the first DAS research work done on customer side substation for operating and controlling between the consumer side system and the substation using PLC. Most of the work in this paper is focused on PLC that provides an effective communication system for both RTU and SCADA systems. The Human Machine Interface for SCADA system is developed using customized software and an RTU microprocessor and its software implements.