(As per IEC, IEEE, SBC, and NEC standards) 1. Introduction Earthing (also called grounding) is a vital aspect of any electrical installation. It provides a low impedance path for fault current, ensuring safety for personnel and protection of equipment. A properly designed earthing system is essential for both functional performance and compliance with international standards. … Read more
Standards: 📘 1.0 Why Compare VCB, SF₆, and Oil CBs? Engineers must select the right circuit breaker for medium and high voltage (MV/HV) based on: ⚡ 2.0 Arc Interruption Methods CB Type Arc Medium Arc Extinguishing Method VCB Vacuum Deionization in vacuum (no re-ignition) SF₆ CB SF₆ gas Arc quenched in pressurized SF₆ Oil CB … Read more
Standards: 📘 1.0 What is an ACB? Air Circuit Breakers (ACBs) are heavy-duty circuit protection devices used for main LV incomer, generator output, and bus-coupler protection in installations with current ratings from 800 A to 6300 A. They interrupt fault current in air, using arc chutes and blowout devices. Modern ACBs feature electronic LSIG protection, … Read more
Standards Referenced: 📘 1.0 What is an MCCB? MCCB (Molded Case Circuit Breaker) is a protective device used for medium-level power distribution (up to 1000V AC) with higher current capacity (up to 2500A). Unlike MCBs, MCCBs offer adjustable trip settings, selective coordination, and high breaking capacities, making them ideal for industrial, commercial, and utility-grade panels. … Read more
Standards Covered: 📘 1.0 Introduction Circuit breakers are automatic protection devices that safeguard electrical installations from faults such as overloads, short circuits, and sometimes earth faults. They operate by automatically disconnecting the power supply when dangerous current levels are detected. Key factors in selecting a circuit breaker include: This article explores Miniature Circuit Breakers (MCBs) … Read more
1.0 📚 Introduction Low Voltage (LV) cables are electrical conductors designed for voltage ratings not exceeding 1000 V AC or 1500 V DC as per IEC and national regulations (e.g., SBC in Saudi Arabia). These cables form the backbone of electrical infrastructure in buildings and industrial environments. The reliability, safety, and efficiency of an electrical … Read more