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Analisis simpatetik trip akibat gangguan ground fault pada sistem proteksi motor Sigi Syah Wibowo; Chandra Wiharya; Slamet Nurhadi
JURNAL ELTEK Vol 18 No 1 (2020): ELTEK Vol 18 No 1
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (549.908 KB) | DOI: 10.33795/eltek.v18i1.209

Abstract

Beban pada unit PA dan CT bekerja dalam tegangan operasi 6 KV dan terangkai dalam satu bus. Terjadi gangguan satu fasa ke tanah pada salah satu motor yang terdapat pada unit CT, yaitu motor MP6521C. Seharusnya relay gangguan tanah (ground fault relay) yang terdapat pada unit CT akan bekerja, tetapi gangguan tersebut juga membuat relai yang terdapat di unit PA juga bekerja, sehingga lima motor yang terdapat di unit PA juga mati. Gangguan ini disebut sebagai gangguan simpatetik. penyebab terjadinya gangguan simpatetik pada 5 motor di unit PA menyebabkan tegangan tegangan turun menjadi 1,8kV dari saat beroperasi normal sebesar 6kV. Karena beban motor adalah jenis beban dengan VA tetap yakni 120KW akan menyebabkan kenaikan arus terjadi di 5 motor unit PA adalah sebesar 32,71 A. Sedangkan untuk setting OC sebesar 18A. Hal ini yang menyebabkan relai pada 5 motor unit PA bekerja dan membuka CB sehingga kelima motor mati. The load on the PA and CT units work in the operating voltage of 6 KV and are assembled in one bus. There is phase to the ground fault on one of the motors in the CT unit, namely Motor MP6521C. Ground fault relay in the unit will work, but the interference also makes the relay in the PA unit also works, so the five motors in the PA unit is also trip. These disorders are referred to as sympathetic trip. The cause of the sympathetic disorder in 5 motors in PA units led to a voltage dropped to 1, 8kV from normal operating time of 6kV. Because the motor load is a type of load with a fixed VA that is 120KW will cause a current increase occurs in 5 Motors PA units are 32.71 A. As for setting OC of 18A. This is what causes the relay on 5 Motors of PA units to work and unlock the CB so that the five motors shutdown.
PENERAPAN SISTEM ELECTRIC SUBMERSIBLE PUMP (ESP) UNTUK BUDIDAYA BETTA SPLENDENS SISTEM RESIRKULASI AKUAKULTUR (RAS) Slamet Nurhadi; Masramdhani Saputra; Binar Surya Gumilang; Divac Nabiel Akbar; Saddani Djulihenanto; Galuh Prawestri Citra Handani; Hanifiyah Fidya Darna Amaral
JURNAL PENGABDIAN MANDIRI Vol. 2 No. 11: Nopember 2023
Publisher : Bajang Institute

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Abstract

Budidaya Betta Splendens memerlukan sirkulasi air yang berkelanjutan, terutama selama masa pertumbuhan ikan dari usia dua minggu hingga enam bulan ketika siap panen. Proses yang dinamakan Resirkulasi Akuakultur (RAS) ini memerlukan pasokan air segar secara teratur. Hal yang menjadi salah satu permasalahan yang dihadapi oleh kelompok ternak Betta Splendens di desa Sumberejo, Donomulyo, Kabupaten Malang. Sumber air yang digunakan untuk budidaya memiliki kedalaman yang sulit dijangkau menggunakan pompa gantung. Dalam kegiatan pengabdian ini penulis akan menerapkan sistem Electric Submersible Pump (ESP) untuk memompakan air dari sumur bor dengan kedalaman 15m. ESP memiliki sistem pompa yang tercelup ke dalam sumber air dan mampu menjangkau kedalaman tersebut. Adanya ESP membuat suplai air dari dalam sumur menuju kolam ataupun bak pembesaran Betta Splendens menjadi lancar dan tentunya akan lebih hemat dan efisien dalam pemanfaatan energi listrik.
Power Line Carrier (PLC) sebagai Media Pendeteksi Phasa Pelanggan Tegangan Rendah Anang Dasa Novfowan; Mochammad Mieftah; Wijaya Kusuma; Slamet Nurhadi
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 3 (2023): ELPOSYS vol. 10 no. 3 (2023)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v10i3.4166

Abstract

With so many distribution substations and the number of household customers, most of whom are single-phase low voltage customers, customer phase verification becomes very important in the load balancing proces. The customer phase detection system that has been studied previously, using radio frequency communication media over the air, is considered less valid if used in border areas between 2 (two) distribution substations. It is felt that the low voltage customer phase detection method will be more valid if it is carried out via Power Line Carrier (PLC) media, namely data communication via electrical lines. And this system consists of two devices, namely a transmitter (called the Master) which is installed on the LV Panel and a receiver (called the Slave) which is carried by the mobile to the detected phase point Short distance phase detection using Power Line Carrie from transmitter to receiver has a 100% success rate in one sub-panel with a transfer speed of 9600 baudrate, with an average detection time for short distances of 5 seconds. For long distance detection, sometimes the detection time is relatively long (± 120 seconds) or even failed, possibly due to the quality of the connection along the conductor being detected, thus causing noise in the network.
Uji Performa Trafo E-I dengan Variasi Rapat Fluks pada Sumber Tegangan Non-Sinusoidal Slamet Nurhadi; Anang Dasa Nofvowan; Ika Noer Syamsiana; Yanik Lailinas Sakinah; Masramdhani Saputra; Mochammad Nur Rochman
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 3 (2023): ELPOSYS vol. 10 no. 3 (2023)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v10i3.4547

Abstract

In the industrial field, transformers are used as a step-up voltage and are used as a step-down level. In a loaded transformer, the power that comes out of the transformer (transformer output power) is not always 100% because there are losses when channeling to the load. Both losses caused by current flowing in the copper wire, losses caused by alternating flux in the iron core, and losses caused by Eddy current in the iron core which result in the outgoing power (output power) from the transformer to the load is not the same as the incoming power (input power) to the transformer. This is known as the efficiency of the transformer. From these problems, the solution offered is to design and implement a transformer using an EI-shaped iron core which is arranged alternately which aims to prevent the occurrence of Eddy Current what happens in the coresolid by applying to the inverter. From the test results of the transformer, it can be concluded that the difference in flux density in the transformer when it is loaded will affect efficiency. The smaller the flux density of the transformer, the better the efficiency, while the greater the flux density of the transformer, the lower the efficiency.
Kinerja Inverter 500 W untuk PLTS Skala Kecil Slamet Nurhadi; Muhammad Fahmi Hakim; Ferdian Ronilaya; Sukamdi; Rahmania Putri Yulissa
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 1 (2024): ELPOSYS vol. 11 no. 1 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i1.5015

Abstract

At Electrical Engineering Department of Politeknik Negeri Malang, there is an EBT learning module in the form of solar panel with small capacity, namely 80 Watts. The only load that can be supplied is DC load because there isn’t installed inverter. Therefore, it is necessary to determine the inverter specifications to be installed in small-scale solar system. This research aims to determine the specifications and test the performance of a 500 W inverter integrated with a 50 Wp solar system. Also analyze power quality parameters and efficiency when connected to various load. The test method is no-load and load testing with the parameters measured including current, voltage, power, frequency and THD. Analysis was also carried out on the correlation between efficiency and loading and inverter pins with THDV and THDI. In the no-load test, the inverter output voltage waveform was obtained as a pure sine wave with a frequency of 50.10 Hz. In testing the LED and LHE loads, it was found that the inverter was good for use when the load was 50-80% of its capacity. The lowest THDV value is at a Pin value of 26 W, namely a THDV value of 0.009%. The highest THDV on the Pin is 130 W with THDV value of 1.9%. The lowest THDI value is at Pin 9.75 W, namely 27.6%. The highest THDI value on the 130 W Pin is 80.9%. The THD limit is still within the IEEE standard limit, namely 5% - 10%.
Peningkatan Keandalan Berbasis Nilai Energy Not Supplied (ENS) Pada Penyulang Banyu Biru Slamet Nurhadi; Mochammad Mieftah; Heri Sungkowo; Sukamdi
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 2 (2024): ELPOSYS vol. 11 no. 2 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i2.5157

Abstract

The reliability of the Banyu Biru feeder at PT. PLN (Persero) ULP Gondang Wetan is critical due to frequent disturbances causing significant energy losses and impacting SAIDI and SAIFI metrics. This study aims to enhance reliability by reducing ENS (Energy Not Served) values through strategic solutions. Data from March to August 2022 revealed 27 disturbances, comprising 6 permanent and 21 temporary interruptions. Initial calculations showed an ENS value of 20,509.84 kWh, a SAIDI of 0.24 hours/customer, and a SAIFI of 0.64 times/customer. The study proposed two scenarios: relocating the LBSM and adding 5 FCOs, and additionally installing a recloser in the second scenario. Post-implementation, ENS values decreased to 7,489.31 kWh, with SAIDI and SAIFI values improving to 0.08 hours/customer and 0.13 times/customer, respectively. These results highlight significant reductions in energy losses and improvements in network reliability, aligning with SPLN 68-2: 1986 standards. This research provides actionable insights for PT. PLN to enhance distribution network reliability and customer satisfaction.
ALAT SEMPROT OTOMATIS SENSOR CAHAYA SEBAGAI UPAYA PENCEGAHAN MASUKNYA KUCING LIAR DI TAMAN TOGA SEHAT WARGA RT. 02 RW 13 DESA ASRIKATON PAKIS KAB. MALANG Sigit Setya Wiwaha; Budi Eko Prasetyo; Aly Imron; Mudjiono, Mudjiono; Slamet Nurhadi
JURNAL PENGABDIAN MANDIRI Vol. 3 No. 10: Oktober 2024
Publisher : Bajang Institute

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.53625/jpm.v3i10.8775

Abstract

Pengabdian ini berfokus pada pembuatan Alat Semprot Otomatis dengan Sensor Cahaya untuk mencegah kucing liar memasuki Taman Toga Sehat di Desa Asrikaton, Pakis, Malang. Tujuan utama kegiatan ini adalah menciptakan teknologi yang ramah lingkungan untuk menjaga kebersihan taman dari kotoran kucing liar tanpa menyakiti hewan tersebut.Metode pelaksanaan meliputi survei lokasi, perancangan alat, pemasangan sensor gerakan yang mengaktifkan semprotan air otomatis, dan edukasi kepada warga tentang cara penggunaan serta perawatan alat. Hasil pengabdian menunjukkan bahwa alat berhasil dipasang, namun masih diperlukan penyesuaian pada sensitivitas sensor agar hanya mendeteksi kucing, bukan manusia. Teknologi ini berpotensi meningkatkan kebersihan taman dan memberikan solusi yang efektif untuk masalah kotoran hewan liar.
Sistem Otomatis Penyimpanan Data Pendeteksi Fase Pelanggan Tegangan Rendah Anang Dasa Novfowan; Mochammad Mieftah; Slamet Nurhadi
Elposys: Jurnal Sistem Kelistrikan Vol. 11 No. 3 (2024): ELPOSYS vol. 11 no. 3 (2024)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v11i3.6251

Abstract

Inaccurate phase detection due to manual data recording often led to errors, impacting load balancing processes in electrical distribution. This research aimed to develop an automated phase detection system for low-voltage customers, utilizing a MicroSD-Card for data storage to reduce human error and enhance data reliability. The device used Power Line Carrier (PLC) communication technology integrated with customer identity (ID PEL) and employed Arduino Uno for phase data processing. The research method involved designing and testing phase detection and data storage functions across various distances to assess system accuracy. Findings indicated the system accurately detected customer phases and stored data efficiently, with minor delays only at longer distances. This automated solution effectively minimized manual errors in phase data entry. Future applications of this system could significantly improve load balancing accuracy and data management in electrical distribution networks
Evaluasi Operasional Pemutus Tenaga Gas SF6 di Gardu Induk 150 kV Rachmat Sutjipto; Heri Sungkowo; Muhammad Khairan; Slamet Nurhadi; Muhammad Fahmi Hakim
Elposys: Jurnal Sistem Kelistrikan Vol. 12 No. 1 (2025): ELPOSYS vol. 12 no. 1 (2025)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33795/elposys.v12i1.6847

Abstract

Circuit Breaker (CB) is a critical component in high-voltage substations that functions to switch and disconnect electrical currents under normal and fault conditions. Over time, operational aging and environmental factors may degrade the performance of CB, potentially impacting power system reliability. This study aimed to evaluate the feasibility of 150 kV CB at Probolinggo Substation, particularly in Transformer Bay 1 and Transformer Bay 3, through a comparative analysis of insulation resistance, contact resistance, contact simultaneity, and SF6 gas purity based on tests conducted in 2021 and 2023. The study employed experimental methods and standard-based evaluations, referring to VDE (Catalogue 228/4), IEC 60694, SKDIR-0520/2014, and CIGRE standards. The findings revealed that although insulation resistance values showed slight degradation in 2023, they remained above the minimum threshold, ensuring safe operation. Contact resistance increased marginally due to dust accumulation and aging but still met the IEC 60694 standard. Contact simultaneity remained well within SKDIR-0520/2014 limits, indicating proper switching operation. SF6 gas purity tests showed a minor increase in moisture content due to condensation, yet all parameters complied with CIGRE standards. These results align with previous studies that highlight CB degradation over time but confirm that regular maintenance can sustain its operational reliability. This research underscores the importance of periodic monitoring and predictive maintenance strategies. Future work should explore real-time IoT-based monitoring and numerical simulations to enhance failure prediction models and optimize maintenance strategies for high-voltage circuit breakers.
Kapasitor Shunt Sebagai Korektor Tegangan Bus di Gardu Induk Muhammad Fahmi Hakim; Slamet Nurhadi; Hanifiyah Darna Fidya Amaral; Diktiaz, Aggahra; Amimah, Anggi; Satria Luthfi Hermawan
Elposys: Jurnal Sistem Kelistrikan Vol. 10 No. 1 (2023): ELPOSYS vol.10 no.1 (2023)
Publisher : Politeknik Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (732.277 KB) | DOI: 10.33795/elposys.v10i1.915

Abstract

Segoromadu Substation has two busbars, namely busbar A and busbar B. Busbar A which has nominal voltage of 150 kV has reached a voltage value of 129.38 kV or experienced voltage drop of 13.75%. The percentage of this voltage drop exceeds a predetermined standard. Therefore, it is necessary to design a shunt capacitor which is then modeled and simulated. Based on calculation and analysis result, capacity of shunt capacitor that should be installed on Bus A is 50 MVAR. After the shunt capacitor was installed, based on simulation, there was an increase of 4.87 kV so the voltage afterward became 139.67 kV or only experienced a voltage drop of 3.19%. So, by installing a shunt capacitor with capacity of 50 MVAR, it can increase busbar voltage of the substation. The shunt capacitor also increases the value of reactive power and current flowing to the busbar.
Co-Authors Aly Imron Amaral, Hanifiyah Darna Fidya Amimah, Anggi Anang Dasa Nofvowan Anang Dasa Novfowan Ananto, Rhezal Agung Asfari Hariz Santoso Bakti Indra Kurniawan Binar Surya Gumilang Budi Eko Prasetyo Chandra Wiharya Diktiaz, Aggahra Divac Nabiel Akbar Galuh Prawestri Citra Handani Masramdhani Saputra Mochammad Mieftah Mochammad Nur Rochman Mudjiono Mudjiono, Mudjiono Muhammad Fahmi Hakim Muhammad Khairan Priya Surya Harijanto Rachmat Sutjipto Rahmania Putri Yulissa Ronilaya, Ferdian Saddani Djulihenanto Satria Luthfi Hermawan Sigi Syah Wibowo Sigit Setya Wiwaha Sukamdi Sungkowo, Heri Wijaya Kusuma Yanik Lailinas Sakinah