Jaringan yang membawa muatan listrik tersebut harus memiliki standar akurasi proteksi yang baik agar dapat tersalurkan dan kemudian dimanfaatkan sebagai keperluan rumah tangga, pabrik, maupun perusahaan besar. Produsen relai proteksi diharuskan untuk menguji kelayakan dari relai sebelum digunakan atau diedarkan ke Unit pelaksana PLN ataupun pabrikan. Melatarbelakangi hal tersebut, peneliti melakukan penelitian akurasi overcurrent protection (OCR) dengan melakukan pengujian berupa jenis uji fungsional akurasi relai OCR di PT PLN PUSERTIF Duren Tiga. Setelah memperoleh hasil pengujian tersebut dilakukanlah analisis akurasi relai OCR dengan berpedoman pada standar IEC 60255-151-2009 dan analisis perbandingan antara perhitungan dan hasil uji. Hasil pengujian akurasi relai OCR seluruhnya sesuai dengan standar , yang pertama akurasi nilai setting (start) diperoleh nilai maksimum 0,50% (±1%), akurasi waktu kerja karakteristik waktu tunda Instant memiliki maksimum nilai 32,90 ms (≤ 40 ms), akurasi waktu kerja dengan waktu tunda definite maksimum hasil uji 29 ms (< 40 ms) , Respon waktu terhadap perubahan arus gangguan diperoleh hasil uji 4,52% (

The network that carries the electric charge must have a good standard of protection accuracy so that it can be channeled and then used for household needs, factories, and large companies. Protection relay manufacturers are required to test the feasibility of the relay before being used or distributed to the PLN implementing unit or manufacturer. With this background, the researchers conducted research on the accuracy of overcurrent protection (OCR) by testing the type of functional test of OCR relay accuracy at PT PLN PUSERTIF Duren Tiga. After obtaining the test results, an analysis of the accuracy of the OCR relay was carried out based on the IEC standard 60255-151-2009 and a comparative analysis between the calculations and the test results. The results of the OCR relay accuracy test are all in accordance with the standard, the first is the accuracy of the setting (start) value obtained a maximum value of 0.50% (±1%), the accuracy of the working time of the Instant delay time characteristic has a maximum value of 32.90 ms (≤ 40 ms) , accuracy of working time with maximum definite time delay test results 29 ms (< 40 ms) , Response time to changes in fault current obtained test results of 4.52% (