Engineering and Technology

Introduction Type testing of medium-voltage (MV) switchboards in NABL-accredited laboratories is a mandatory requirement for compliance with IEC 62271-200. These tests verify critical aspects such as dielectric strength, temperature rise, short-time current withstand, and internal arc classification. However, switchboards are usually offered in multiple variants within the same product family—differing in current ratings, fault levels, … Read more

Introduction In today’s heavily mechanised and digitised world, electricity forms the foundation of modern living. From homes and offices to large-scale industries and infrastructure like highways, railways, airports, and ports—every function relies on a stable, uninterrupted power supply. At the heart of this dependency lies the electrical distribution system, which ensures the delivery of power … Read more

Introduction In another article, “Sheet Metal Enclosures for Electrical Switchboards: A Cornerstone of Electrical Safety and Reliability” we discussed the importance of sheet metal enclosures for electrical switchgear assemblies. We have also discussed the type of metal enclosures. We all know that all metals are prone to environmental degradation, and painting is one of the … Read more

Introdcuction In the world of electrical systems, sheet metal enclosures play a vital role in ensuring the safety, reliability, and efficiency of electrical switchboards. These are not just protective enclosures, rather they do more than that. They are engineered structures designed to withstand environmental challenges, prevent electrical hazards, and provide seamless integration of switchgear & … Read more

Introduction Electrical power distribution networks, which include generation, transmission, and distribution, are often referred to as electrical grids. These grids have been the backbone of the world’s electricity supply since the late 19th century. Initially, the operating principles of these electrical grids were simple: generate electricity and send it to users, such as homes and … Read more

Introduction: High voltage switchboards are specialized electrical distribution equipment designed to handle higher voltage levels than standard switchboards. They are commonly used in industrial & commercial facilities, power plants, substations, and other applications where high-voltage electrical power connections are sanctioned by the local utility. Let us start with what is the relevant national and international … Read more

Background Internal Arc Faults can occur in low-voltage as well as medium-voltage switchgear panels. However, we have chosen to discuss the internal arc fault phenomenon in medium-voltage switchgear and its impact on human safety because of its severity in the latter case. What is an Internal Arc Fault? Very important to understand what this phenomenon … Read more

Introduction We have learned the fundamentals of Power Quality in our earlier article “Power Quality Basics”. We have also learned the importance of good Power Quality on Low Voltage distribution networks along with some basic calculations. Now we will go a little deeper and understand the implementation of power quality improvement methods. Power factor is … Read more

What is Power Quality? Power generated and used is with a sinusoidal wave characteristic at 50 Hz at a power factor close to unity. If it is free from other waveforms of voltage and current, then Power Quality is good. If it is mixed with other waveforms of voltage and current, then Power Quality is … Read more