Realibilty is very important factor in a system distribution network. Some parameters which can be used as a reference to on knowing realibi;ity a system that is the distribution SAIFI (System Average Interruption Frequency. The calculations the average disorders for one year. SAIDI (system Average Interruption Indekx) the duration of the average disorders for one year. Based on the accounts and analysis found that the completety SAIFI rayon jasinga be categorized less’s reliable. Because the value of saifi beyond the limits of a maximum of that have been determined by rayon jasinga.The performance of rayon jasinga be catergorized less’s realiable exceeds that in which.