Testing

Testing & Maintenance

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...

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...

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...

Testing & Maintenance Standards

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

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...

Home Testing

Testing

Vacuum Interrupter Testing

Predicting remainder of field life finally becomes easier

BY FINLEY LEDBETTER, Group CBS

Vacuum interrupters (VIs) have widely replaced older air-magnetic and oil interrupters for circuit breakers rated at one kilovolt (kV) or higher. These devices offer up to 10 times the expected lifetime than newer SF6 (sulfur hexafluoride) gas interrupters.

Unfortunately, nothing lasts forever. Manufacturers predict that most of their interrupters have a service life of 20 years; however, users generally ignore this fact....

Testing Articles

Wireless Measurement Systems

CSA Z462 and CSA Z463: A Powerful Combination

T&D Buyer’s Guide Companies

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Catalog

Intelligent Power Today Magazine

Testing & Maintenance

Thermography 101

Understanding the DC Overpotential Test

Strategies for Accurate Vibro-Acoustic Monitoring of OLTCs

Safe Electrical Maintenance Checklist

A Closer Look into the True Cost of Replacing Electrical Switchgear

Vibro-Acoustic Diagnostics for OLTCs

Testing

Vacuum Interrupter Testing

Testing Articles

Wireless Measurement Systems

CSA Z462 and CSA Z463: A Powerful Combination

T&D Buyer’s Guide Companies

Testing Videos

OmniMax Ross Bridge Retrofit Case Study

Trident Solid Dielectric Switchgear from G&W Electric

Sediver toughened glass manufacturing process

Testing Products

Pole Guard: Blocks Animal Access to Overhead Assets via Climbing the Pole

SorbNseal

STANDALONE OLTC EVENT RECORDER - OTM-X

Testing Shared Media

Circuit Breaker And Switchgear Handbook Vol. 1

Electrical Transformer Testing Handbook, Vol. 5

Circuit Breakers and Switchgear Handbook, Vol. 5

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