Surge Protection

How and Why Varistor Failure Occurs Including the Effect of Multipulse Surges

This article is about varistor construction, characteristics, testing and the often-unappreciated ways varistors can fail.

IEC 62368-1 AC Mains Port Protection Component Requirements

This article describes the MOV circuit design sequence for the AC mains port overvoltage protection of pluggable type A equipment.

Standards for Information and Communications Technology (ICT) Surge Protectors and Protective Circuits

The standards reviewed here have been developed to help ensure that ICT circuits will be adequately protected against surges, especially those due to lightning.

New Requirements for MOVs Used for Surge Suppression on AC Mains Ports

It is a common misconception that any product that complies with IEC 60950-1 will also comply with IEC 62368-1. A key goal of this article is to help readers of IEC 62368-1 understand the underlying safety concerns that the new requirements are trying to address.

Second Edition Released of IEC 60230:2018 for Impulse Tests on Cables and Their Accessories

The International Electrotechnical Commission (IEC) has released IEC 60230:2018 for impulse tests on cables...

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Power Feeds to Remote Radio Heads

This article will discuss the factors that affect the design of surge protectors for Remote Radio Head (RRH) equipment.

Joslyn Surge Protection Devices Now Available with Steel Enclosures

Thomas & Betts announced their line of Joslyn® AC surge protection devices (SPDs) are now available with stainless steel enclosures for corrosive applications, including wastewater treatment plants, oil and gas processing, food and beverage processing and mining.

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What's New

Military and Aerospace EMC: High Intensity Radiated Fields (HIRF)

Practical Engineering: Using Welch-Satterthwaite Formula in Uncertainty Analysis

FCC Enforcement Bureau Convenes Regulators to Discuss Emerging Trends

ARRL Releases Updated Amateur Radio Handbook

EMC Bench Notes: Pre-Compliance Testing for Radiated Emissions, Part 4 – Measurement Software