Testing

Testing & Maintenance

A Closer Look into the True Cost of Replacing Electrical Switchgear

During my switchgear modernization presentations all over the US, I am constantly reminded of the concerns customers face with their aging electrical infrastructure. For the most part, these center around safety, reliability and productivity: Replacements parts are very hard (or impossible) to...

Transformer Testing & Maintenance

Strategies for Accurate Vibro-Acoustic Monitoring of OLTCs

Vibro-acoustic diagnostics have emerged as a rapid and non-invasive method to monitor and assess the health of On Load Tap Changers (OLTCs) in electrical power systems. This technology detects and analyzes the vibrations and sound patterns generated by OLTCs during operation, helping to identify...

Safe Electrical Maintenance Checklist

Reduce the risk of arc flash hazards with CSA Z462 BY ROBERT BURGESS, Lineman’s Testing Laboratories Safe electrical maintenance practices and on-going personnel training can minimize the likelihood of electrical injuries and fatalities due to electrical shock, electrocution, arc flash and arc...

Transformer Testing & Maintenance

Vibro-Acoustic Diagnostics for OLTCs

On-load tap changers (OLTCs) are crucial components within power transformers, enabling voltage regulation while the transformer remains energized. Maintaining the health of OLTCs is essential for ensuring grid reliability and efficient power delivery. Traditionally, diagnosing potential problems...

Thermography 101

Thermography used to be expensive, difficult, and primarily used by large industrial facilities and the military. These days, it has become much more affordable, easier to use, and more broadly applied. A thermal imager works by producing thermal (heat) pictures of the equipment. Electrical...

CSA Z462 and CSA Z463: A Powerful Combination

I recently viewed a destroyed 600-volt electrical panel board that had exploded when an operator reset an 800-ampere (A) breaker. His leather-palmed gloves had synthetic backs that ignited and seriously burned the back of his hands. His flame-resistant (FR) shirt was untucked and he was burned on...

Home Testing

Testing

Understanding the DC Overpotential Test

The 411 on DC testing of low-voltage circuit breakers

BY JIM WHITE, Shermco Industries, Inc.

The direct current (DC) overpotential test is one of the basic tests conducted to ensure an insulation system has adequate insulation life to make it to the next scheduled maintenance interval. While not a difficult test to perform, the test equipment used could have some serious deficiencies that may not be discovered unless the technician knows how to verify test...

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Intelligent Power Today Magazine

Testing & Maintenance

A Closer Look into the True Cost of Replacing Electrical Switchgear

Strategies for Accurate Vibro-Acoustic Monitoring of OLTCs

Safe Electrical Maintenance Checklist

Vibro-Acoustic Diagnostics for OLTCs

Thermography 101

CSA Z462 and CSA Z463: A Powerful Combination

Testing

Understanding the DC Overpotential Test

Testing Articles

Wireless Measurement Systems

T&D Buyer’s Guide Companies

Testing Videos

Sediver toughened glass manufacturing process

Advanced Field-Testing Technologies for Oil Filled Transformers

How Circuit Breaker Monitoring Helps Detect Problems Before Failure

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DDIN Midsize Clipping Hook

Spectrum Industries, Inc

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A New Age for Toughened Glass Insulators

2024 HVAC catalog USA

Basic Electricity Handbook, Vol. 1

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