Indonesia is actively developing the potential for renewable energy as a substitute for depleting fossil energy reserves. Wind energy is clean energy without polling the environment. Wind energy in Indonesia has great potential, but it is still not optimal enough for its utilization. One form of alternative energy that can be utilized as mechanical energy by wind turbines to convert into electrical energy by dc generators. Ventilators that operate for 24 hours function to suck water and, located on the roof of a warehouse, sports hall . Utilization of wind to become electrical energy is designed from the use of a turbine ventilator as a medium to convert wind into motion energy, where the movement of the turbine is continued by pulley and v-belt comparisons to the generator, this generator produces electricity. This research examines how much electrical energy is produced at different wind speeds ranging from 3 to 5.4 m/s. From the tests conducted, the generator rotation, and the lowest voltage is at wind speed of 3 m/s which is 3.6 V. while the generator speed and the highest voltage is obtained if the wind speed is 5.4 m/s which is 10.3 V.

Electrical Energy is a very important need, but the electrical energy we use today still comes from conventional power plants that have negative threats such as pollution and fossil fuel reserves that are decreasing. To overcome this, by utilizing alternative energy that is environmentally friendly, one of them is wind energy and solar energy. Hybrid power plants use savonius helix wind turbines and solar cells are made to minimize the use of conventional energy. This tool utilizes wind and solar energy as the main media of electricity generation. The wind turbine which is made is a type of helix savonius vertical turbine that has a large torque, can rotate with low wind speed with a turbine size 80 cm high, diameter 25 cm which is connected to the generator and mounted on mechanical construction with a height of 200 cm and mounted control panel and solar cell with a capacity of 20 WP. This study aims to develop the potential of alternative energy as a power generation medium and be used as a source of flashing lights in the Indorama Engineering Polytechnic lightning tower tower. Savonius helix wind turbines that are designed require a minimum wind speed of 2.45 m / s for the start of the turbine rotation. Generating from the generator produces a maximum voltage of 18.64 V with a generator rotation of 304 rpm when not loaded and when loaded produces a maximum spin voltage of 281.3 rpm, 11.73 V voltage and 0.038 W power with a wind speed of 5 m/s. From the results of testing this hybrid power plant can be used for flashing lights on the lightning rod tower of the Indorama Polytechnic Engineering campus with a duration of 12 hours per day.

Pemberian pakan ikan merupakan salah satu hal penting untuk usaha budidaya ikan. Saat ini pemberian pakan umumnya masih tergantung pada sumber daya manusia yang bersifat manual. Oleh karena itu dirancang alat untuk memberi pakan ikan yang dapat berkerja secara otomatis berdasarkan waktu atau jadwal pemberian pakan dan pengoprasian secara Internet of Things. Pemberian pakan ikan otomatis ini menggunakan hardware berupa Wimose D1 Mini yang merupakan pengongtrol utama, motor servo Mg995 berfungsi untuk mengatur keluar nya pakan ikan dari tong penyimpanan pakan, sensor ultrasonik berfungsi untuk mendeteksi jumlah pakan yang tersedia di dalam wadah penyimpanan pakan yang di tampilkan secara IoT pada android. Motor DC berfungsi sebagai pelontar  pakan  pada saat pemberian makan ikan. Mesin pemberi pakan ikan berbasis IoT ini dapat dioperasikan secara Internet of Things, manual dan otomatis.  yang di jalankan oleh smartphone android/aplikasi yang dapat dibuktikan dengan pengujian yang dilakukan dengan jarak 18 Km dengan waktu respon kerja alat selama 1,48 detik, serta mampu menampilkan sisa pakan yang tersedia pada tong penyimpanan pakan berupa pemberitahuan ketika tampungan dalam keadaan kosong atau habis.

Kata kunci: Harmonisa, Beban non-linier Abstract --Harmonic disturbances that occur in the electricity distribution system due to the current and voltage waveform distortion. Current and voltage waveform distortion is caused by the formation of waves with frequencies integer multiples of the fundamental frequency. These waves then ride on the wave of the original so that defects formed waves that represent the number of purely momentary wave with harmonic waves.The existence of non-linear load contained in Polytechnic Campus Engineering Indorama as a partial contributor to the harmonics that occur include electronic ballasts, variable frequency, thyristor ac power controllers (TCR), silicon controlled rectifier (SCR), as well as adjustable speed drives (ASD) contained in Texture engine unit Drawn Yarn (DTY

Keywords: Lightning strikes, electronic equipment, protection of buildings PENDAHULUANPetir pada umumnya terjadi karena adanya muatan negatif yang terkumpul di bagian bawah awan dan menyebabkan terinduksinya muatan positif diatas permukaan tanah sehingga terbentuk medan listrik antara awan dan tanah. Semakin besar beda potensial antara muatan pada awan dan permukaan bumi, maka terjadi pelepasan muatan berupa petir (Cooray, 2015) (Russel et. al., 2014) (Bandri, 2014.Oleh karena kerugian-kerugian yang ditimbulkan sangat besar, maka diperlukanlah suatu sistem proteksi petir yang dapat melindungi semua bagian dari suatu bangunan, termasuk manusia dan peralatan yang ada di dalamnya terhadap bahaya dan kerusakan akibat sambaran petir (Russel et. al., 2014) (Gagné et., al., 2014) (Bandri, 2012.Salah satu cara yang ditempuh untuk melindungi bangunan tinggi dari sambaran petir adalah dengan instalasi atau pemasangan penangkal petir yang handal dan memenuhi persyaratan yang berlaku, sehingga jika terjadi sambaran petir maka sarana inilah yang akan menyalurkan arus petir kedalam tanah (Du et. al., 2016) (Johns, 2016) (Hosea, 2004).