Surge Arrester Failure: Causes, Lightning Effects, and Solutions

ByNitin N

Introduction:Surge arresters are crucial devices used in electrical systems to protect equipment such as transformers, cables, and switchgear from transient overvoltages caused by lightning and switching surges. However, surge arrester failure remains a significant reliability concern in substations and transmission networks. Understanding the causes of surge arrester failure, identifying its internal mechanisms, and implementing effective…

Right of Way for Power Transmission Line Construction in India

ByNitin N

In India’s expanding transmission network, the ministry of power plays a vital role in the development of transmission projects. Power Transmission Line Right of Way (RoW) is more than a strip of land—it’s a safety, reliability, and regulatory foundation for the grid.Following the Central Electricity Authority (CEA) Notification dated 9 October 2025, utilities must now…

Distance Protection Setting Calculation and Testing for EHV Transmission Lines

ByNitin N

Modern distance protection relies on precise setting calculations and comprehensive testing methodologies to ensure reliable fault clearance in EHV transmission networks, especially when a fault occurs. Understanding distance relay setting calculation fundamentals combined with systematic testing procedures forms the backbone of effective power system protection schemes, particularly for transformer applications. Zone-Based Distance Protection Strategy Distance…

Why Improper Transformer Core Grounding Causes EHV System Faults

ByNitin N

Transformer core grounding is a fundamental part of safe, reliable EHV substation operation. If this critical detail is missed or poorly executed, a single trip can escalate into system-wide failures, high repair bills, and long outages affecting the entire power system. Field experience proves that only practical, proven grounding practices guard the transformer—and the entire…

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