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All Journal GEMA TEKNOLOGI
Eko Ariyanto
Universitas Diponegoro
Computer Science & IT

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Rancang Bangun Sistem Monitoring Dan Pemutusan Otomatis Sambungan Sementara (Pesta) Berbasis IoT (Internet Of Things) Latiefa Achsani Yusfira Sulaiman; Eko Ariyanto
Gema Teknologi Vol 21, No 3 (2021): April 2021 - October 2021
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gt.v21i3.90249

Abstract

Temporary Connection (PESTA) is an electricity connection service provided by PT. PLN (Persero) intended for customers’ temporary needs or those requiring service for a specific period, with a capacity greater than the installed contracted capacity. Examples of temporary customer needs include electricity for repair shops, celebrations, etc. Limited field personnel, combined with overlapping tasks related to PBPD (New Connections and Capacity Changes), the lack of direct notification regarding the completion time of temporary connections, and the distance to customers’ homes, result in delays in normalizing temporary connections. Delays in normalizing temporary connections affect customers’ metered usage, which does not match the initial contracted capacity, resulting in losses for PT.PLN (Persero) because the metered usage is billed at the initial contracted rate rather than the temporary connection rate (non-technical loss). To address these issues and minimize losses, a monitoring and automatic disconnection device for temporary connections was developed to prevent delays in normalization and achieve energy savings (saved kWh). This device utilizes an Automatic Transfer Switch (ATS) system with a relay and timer that automatically transfers the load from the PESTA kWh meter to the customer’s kWh meter. The ESP-32 module acts as a microcontroller that processes data from the PZEM-004T sensor (with an error margin of 0.02–0.05%) and sends automatic disconnection notifications via the Blynk app and SMS.
Rancang Bangun Alat Monitoring Breaker Motor 3 Fasa Berdasarkan Konfigurasi Breaker PLTU UBP Priok Dengan Pengukuran Keserempakan Serta Tegangan Secara Real-Time Berbasis Modul Optocoupler AC Serta Sensor ZMPT101B Dan Internet Of Things Melissa Rahmawati Yusuf; Eko Ariyanto
Gema Teknologi Vol 23, No 2 (2025): October 2024 - April 2025
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gt.v23i2.90342

Abstract

This monitoring system was designed to automatically detect breaker status based on 24V DC voltage, utilizing a 25V DC sensor. The system is capable of transmitting real-time data with an average response time of 9 seconds. The ZMPT101B voltage sensor used in the setup demonstrated low error rates, with 0.97% for phase R, 0.91% for phase S, and 0.58% for phase T. Additionally, an AC optocoupler module was employed to detect 220V AC, enabling accurate synchronization measurement. Results indicate that synchronization during the "on" condition is highly accurate, although a slight delay was observed during the "off" condition due to residual current in the signal amplification transistor (S8050) located within the module. Testing at the Priok UBP Combined-Cycle Power Plant confirmed that the system meets the company's configuration standards, with an obtained the best value of 2 ms with average time of  3.2 ms, suggesting that the breakers operate within optimal parameters. Overall, the system performs effectively and aligns with the company’s operational requirements.
Implementasi Sensor PZEM-004T Sebagai Alat Penghitung Biaya Listrik Pada Pelanggan Pascabayar Tegangan Rendah 1 Fasa Yang Dilengkapi Sistem Monitoring Arus Berlebih Berbasis Telegram Rizki Ardianto; Eko Ariyanto
Gema Teknologi Vol 22, No 1 (2022): April 2022 - Oktober 2022
Publisher : Vocational School Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.14710/gt.v22i1.90228

Abstract

In 2022, approximately 41.47% of residential electricity customers in Lampung Province were still using postpaid kWh meters. However, many residents have complained that their electricity bills are inaccurate. Excessive current in residential electrical systems can cause the MCB to trip, disrupting electricity usage. If left unchecked, this can lead to new problems such as electrical short circuits, which can trigger fires. The PZEM-004T sensor was implemented as a monitoring tool to track the amount of electricity consumed, along with an estimate of the electricity bill, and utilizes the Telegram platform to monitor excessive current in residential electrical installations. The device is designed for single-phase, low-voltage residential applications with a capacity of 450 VA to 900 VA. Measurement and testing results showed an average error percentage of 2.67% for current, 0.3995% for voltage, 1.78% for power, 1.84% for electrical energy consumption, and 1.5% for the estimated electricity bill. These values remain within the permissible limits set by Ministry of Energy and Mineral Resources Regulation No. 4 of 2009, which specifies a tolerance of ±2%.
Co-Authors Latiefa Achsani Yusfira Sulaiman Melissa Rahmawati Yusuf Rizki Ardianto