KURNIAWAN, HARI (2020) RANCANG BANGUN ALAT MONITORING ARUS BOCOR KABEL SEKUNDER TRANSFORMATOR BERBASIS IoT (Internet of Things) CAYENNE MY DEVICE. S1 thesis, Universitas Mercu Buana.
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Abstract
The leakage current in the transformer cable occurs due to a decrease in the level of insulation resistance on the cable due to bending errors during installation, continuous use, and the current load which is always maximum in accordance with its nominal value resulting in an increase in the value of the leakage current in the cable which can cause insulation failure, resulting in excess current is grounded and can cause the breakdown cable or transfomator to trip. As a precautionary measure, monitoring the leakage current of the cable manually by using a multimeter to measure and record the value of the leakage current that occurs. Based on this, the author tries to provide a solution in the form of a prototype of the leakage current monitoring tool online and automatically by using the current sensor SCT013 input and processed by the Wemos D1 Mini microcontroller and displaying measurement data on the Cayenne My Device application from a computer or smartphone online real time, and can send alert notifications in the form of email and SMS. After testing, the tool can send notifications and warnings to users via SMS with a response time of 14.4 seconds and Email with a response time of 21.6 seconds. The highest load current at transformer 2 GI Serpong occurs at 11.00, which is 1260 A and the leakage current reads 1.88 A, while the lowest load current occurs at 22.00, which is 990 A and the leakage current is 0.3 A. Keywords: leakage current, Cayenne My Device, Sensor SCT013, Wemos D1 mini Arus bocor pada kabel transformator terjadi karena menurunnya tingkat resistansi isolasi pada kabel tersebut dikarenakan kesalahan tekuk pada saat pemasangan, pemakaian yang terus menerus, dan beban arus yang selalu maksimal sesuai dengan dengan nominalnya mengakibatkan kenaikan nilai arus bocor pada kabel yang dapat menyebabkan kegagalan isolasi, mengakibatkan arus berlebih tersalur ke tanah dan dapat membuat kabel breakdown atau transfomator trip. Sebagai usaha pencegahan, monitoring arus bocor kabel secara manual dengan menggunakan multimeter untuk mengukur dan mencatat nilai arus bocor yang timbul. Berdasarkan hal tersebut, penulis mencoba memberikan solusi berupa prototype alat monitoring arus bocor secara online dan otomatis dengan menggunakan masukan sensor arus SCT013 dan diproses oleh microcontroller Wemos D1 Mini dan menampilkan data hasil pengukuran pada aplikasi Cayenne My Device dari komputer ataupun smartphone secara online real time, serta dapat mengirimkan notifikasi peringatan berupa email dan SMS. Setelah dilakukan pengujian, alat dapat mengirimkan notifikasi dan peringatan kepada pengguna melalui SMS dengan respon waktu 14,4 detik dan Email dengan respon waktu 21,6 detik. Arus beban tertinggi pada trafo 2 GI Serpong terjadi pada pukul 11.00 yaitu sebesar 1260 A dan arus bocor terbaca 1,88 A sedangkan arus beban terendah terjadi pukul 22.00 yaitu sebesar 990 A dan arus bocor 0,3 A. Kata kunci : Arus bocor, Cayenne My Device, Sensor SCT013, Wemos D1 mini
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