Jatuh tegangan adalah selisih tegangan terima dan tegangan kirim. Yang mana jatuh tegangan ini dapat dikarenakan jaringan yang terlalu panjang sehingga memperbesar nilai losses. Dikatakan jatuh tegangan apabila nilai tegangan turun lebih dari 10% tegangan nominal sesuai SPLN No.1 tahun 1995. Dari analisa data, jatuh tegangan di mulai dari panel 5 fasa S jurusan B dengan suplai gardu SR183 yaitu 11,88%. Dalam perbaikannya, dapat mencari gardu terdekat ataupun penambahan gardu sisip. Dengan mencari gardu terdekat nilai jatuh tegangan di panel 5 berkurang menjadi 0,39% di fasa R, 0,59% di fasa S dan 0,68% di fasa T. Sedangkan dengan penambahan gardu sisip nilai jatuh tegangan berkurang menjadi 0,015% di fasa R, 0,024% di fasa S dan 0,027% di fasa T. Kedua metode perbaikan layak secara operasional karena dapat memperbaiki nilai jatuh tegangan. Pada sisi investasi diketahui metode perbaikan dengan mencari gardu terdekat layak secara investasi dimana NPV>0, IRR>Discount Rate, B/C>1, serta PBP5 tahun. Maka dari itu, dalam perbaikan jatuh tegangan pelanggan di BSD Villa Serpong dapat menggunakan metode pertama yaitu mencari gardu terdekat.

The voltage drop is the difference between the receiving voltage and the transmit voltage. Where this voltage drop can be due to a network that is too long so that it increases the value of losses. It is said that the voltage drop is if the voltage value drops more than 10% of the nominal voltage according to SPLN No.1 of 1995. From the data analysis, the voltage drop starts from the S-phase panel 5 majoring B with the supply of the SR183 substation, which is 11.88%. In the repair, you can look for the nearest substation or add additional substations. By looking for the nearest substation the voltage drop value in panel 5 is reduced to 0.39% in the R phase, 0.59% in the S phase and 0.68% in the T phase. Meanwhile, with the addition of the insertion substation the voltage drop value is reduced to 0.015% in the R phase, 0.024% in the S phase and 0.027% in the T phase. Both repair methods are operationally feasible because they can improve the value of the voltage drop. On the investment side, it is known that the repair method by finding the nearest substation is investment-worthy where NPV>0, IRR>Discount Rate, B/C>1, and PBP5 years. Therefore, in repairing the voltage drop, customers at BSD Villa Serpong can use the first method, which is to find the nearest substation.