Keandalan sistem penyaluran tenaga listrik sangat penting, karena beberapa gangguan di sistem distribusi bisa mengakibatkan terganggunya penyaluran tenaga listrik ke konsumen, sehingga diperlukan rele proteksi. Rele VAMP 40 mempunyai beberapa macam karakteristik seperti Definite Time (DT), Standard Inverse (SI), Very Inverse (VI), Extremely Inverse (EI), dan Long Time Inverse (LTI). Digunakan dalam proyek akhir untuk rancang bangun modul praktikum proteksi rele arus lebih. Dari hasil pengujian karakteristik waktu-arus dan simulasi setting hubung singkat pada simulator jaringan tegangan menengah serta dilengkapi dengan data-data yang diperoleh, kemudian dianalisa, menunjukan bahwa rele tersebut masih mempunyai akurasi yang baik. Kata kunci: VAMP 40, rele arus lebih, karakteristik rele.

Electrical power supply system reliability is very important, because some disturbances that occurs is the distribution system can affect on electrical energy distribution to consumers, so that it is necessary to use relay protection. Relay VAMP 40 that has some kind of characteristic like Define Time (DT), Standard Inverse (SI), Very Inverse (VI), Extremely Inverse (EI), and Long Time Inverse (LTI). Is using in final project to design and build practical module of over current relay protection. From testing of current-time characteristic and simulation short circuit setting on medium voltage feeder simulator completed with data analyzing indicates that this relay still have good accuracy. Keywords: VAMP 40, over current relay, the characteristics of relay.

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