HIDAYAT, MUHAMMAD FAHRI (2025) PERANCANGAN SETTING RELE PROTEKSI ARUS LEBIH MOTOR INDUKSI 6.6 KV PADA PANEL PENGASUTAN CHILLER MENGGUNAKAN ETAP 12.6.0. S1 thesis, Universitas Mercu Buana Jakarta.
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Abstract
The HVAC system plays a crucial role in various industries, especially in electric vehicle battery manufacturing, which requires consistent cooling to maintain production quality. Failures in chillers, such as short circuits or overcurrent, can cause significant operational disruptions and financial losses. A major limitation of the previous protection system was the use of Motor Protection Relay (MPR), which lacked the capability to quickly and adaptively respond to disturbances. This often led to protection coordination failures, causing upstream disconnections and disrupting the continuity of the electrical distribution system. To address these issues, this study was designed to enhance the reliability of the protection system by replacing MPR with the Intelligent Electronic Device (IED) based on GIPAM 3000 FI. This research employed a simulation-based approach using ETAP 12.6.0. The methodology included short-circuit current analysis, redesign of protection relay settings, and simulation of protection coordination. Input data included cable specifications, current transformers, and chiller induction motor characteristics. Calculations were performed to determine the relay pick-up current, time delay, and validation of the new protection coordination according to international standards such as IEC 60255-151 and IEEE Std C37.113-2015. The new system was designed to ensure that faults only affect the downstream zone without disrupting the upstream side. The simulation results show that the new protection system with GIPAM 3000 FI relay significantly improves the selectivity and reliability of the protection. Protection coordination ensures that faults disconnect power only on the downstream side, with relay operating times of 100 ms for downstream and 250 ms for upstream. The calculated three-phase short-circuit fault current was 81,074 A, while the ETAP simulation yielded 80,072 A, with a deviation of only 2.2%. The pick-up current settings for the relay are 768 A for downstream and 864 A for upstream, ensuring optimal thermal protection of cables in accordance with their thermal capacity curves. This enhanced protection system not only increases the reliability of the electrical distribution system but also supports the operational stability of electric vehicle battery manufacturing with higher efficiency. Keywords: Motor Protection, Short-Circuit Fault, Current Transformer, ETAP 12.6.0, Relay Coordination, Protection Selectivity. Sistem HVAC memiliki peran krusial dalam berbagai industri, terutama manufaktur baterai kendaraan listrik, yang membutuhkan pendinginan konsisten untuk menjaga kualitas produksi. Gangguan pada chiller, seperti hubung singkat atau arus lebih, dapat menyebabkan gangguan operasional yang signifikan, bahkan kerugian finansial besar. Salah satu kelemahan utama sistem proteksi sebelumnya adalah penggunaan Motor Protection Relay (MPR) yang tidak mampu merespons gangguan dengan cepat dan adaptif. Akibatnya, sering terjadi kegagalan koordinasi proteksi yang memutus aliran daya pada sisi upstream, sehingga mengganggu kontinuitas sistem distribusi listrik. Untuk mengatasi masalah ini, penelitian ini dirancang untuk meningkatkan keandalan sistem proteksi melalui penggantian MPR dengan Intelligent Electronic Device (IED) berbasis GIPAM 3000 FI. Penelitian ini menggunakan pendekatan berbasis simulasi dengan perangkat lunak ETAP 12.6.0. Langkah-langkah meliputi analisis gangguan arus hubung singkat, perancangan ulang pengaturan relay proteksi, dan simulasi koordinasi proteksi. Data masukan mencakup spesifikasi kabel, transformator arus, serta karakteristik motor induksi chiller. Perhitungan dilakukan untuk menentukan nilai arus pick-up, time delay relay, serta validasi koordinasi proteksi baru dengan standar internasional seperti IEC 60255-151 dan IEEE Std C37.113-2015. Sistem baru dirancang untuk memastikan gangguan hanya memengaruhi zona downstream, tanpa mengganggu sisi upstream. Hasil simulasi menunjukkan bahwa sistem proteksi baru dengan relay GIPAM 3000 FI meningkatkan selektivitas dan keandalan proteksi secara signifikan. Koordinasi proteksi memastikan gangguan hanya memutus aliran daya di sisi downstream, dengan waktu operasi relay sebesar 100 ms di downstream dan 250 ms di upstream. Perhitungan arus gangguan hubung singkat tiga fasa menunjukkan hasil manual sebesar 81,074 A, sedangkan simulasi ETAP menghasilkan 80,072 A, dengan deviasi hanya 2,2%. Pengaturan arus pick-up relay untuk downstream adalah 768 A dan upstream 864 A, memastikan perlindungan termal kabel yang optimal sesuai kurva kemampuan kabel. Sistem proteksi baru ini tidak hanya meningkatkan keandalan sistem distribusi listrik, tetapi juga mendukung stabilitas operasional manufaktur baterai kendaraan listrik dengan efisiensi yang lebih tinggi. Kata kunci: Proteksi Motor, Hubung Singkat, Current Transformer, ETAP 12.6.0, Koordinasi Relay, Selektivitas Proteksi.
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