This paper discusses the use of distribution transformers as a power line communication channel and seeks the possible usage in smart - grid applications. Traditionally, PLC is achieved over the transmission line where all parameters are known for line protection. Generally, transformers are bypassed during this operation because they behave as a low pass filter and are not suitable to transmit high frequency data. In this work, data transmission is achieved using distribution transformers up to several kHz ranges. 400kVA, Dy11, 11/0.416kV distribution transformer is used for real time tests. Then the efficiency of the suggested methodology is given according to BER criterion.