<![CDATA[A Low-Voltage Distribution Panel (PHB-TR) is a component within a Low-Voltage Distribution Network (JTR) that serves to connect, distribute, protect, and control electrical power downstream of a distribution transformer. The protection system within a PHB-TR utilizes NH-fuses as the primary protective device, acting as current limiters and safeguards against overcurrent conditions. According to reports from UP3 Purwokerto, faults within PHB-TR units remain a frequent occurrence. Furthermore, there have been numerous customer reports regarding prolonged response times for faults in the Low-Voltage Distribution Network, as technicians are often required to visit each site individually to perform maintenance. Consequently, there is a need for an innovation that enables PLN personnel to identify faults and monitor the status of PHB-TR units more effectively and efficiently. Data indicates that many PHB-TR faults are caused by damaged or blown NH-fuses that have not yet been replaced. This article addresses these issues by proposing a device for fault detection and current monitoring in PHB-TR NH-fuses, equipped with an IoT-based (Internet of Things) data logger. The device can transmit information to PLN personnel within 15–30 seconds of a fault occurring. It detects several types of issues: blown NH-fuses (when current exceeds the nominal rating), insulation breakdown (detected via input voltage at the fuse holder), and load imbalance during overcurrent conditions (exceeding a 20% variance between phases). When a fault is detected, an LED indicator illuminates, and personnel receive a notification via an application, accompanied by an audible alarm. The core components of this device include the PZEM-004T 10A (version 3) current and voltage sensor; an Arduino Mega 2560 microcontroller for data processing; a 20x4 LCD for real-time display of current and voltage values; and a MicroSD card module combined with an RTC (Real-Time Clock) for data logging. Additionally, an ESP8266 (NodeMCU) Wi-Fi module is integrated to transmit information regarding faults at the low-voltage distribution panel (PHB-TR) to the Blynk application. This device enables faster fault resolution at the PHB-TR, reduces operational maintenance costs, simplifies monitoring for PLN personnel, and improves the company’s performance metrics—specifically the Key Performance Indicators (KPIs) related to SAIDI and SAIFI. Furthermore, customers benefit from enhanced service, as power outages become less frequent and shorter in duration, ultimately strengthening PLN’s public image]]>
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