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The SorbWeb™ Plus DRH4 Synergy

If you have oil-filled transformers, the law requires you to have a spill prevention plan in place, up to and including a secondary containment system to protect the environment and prevent oil from reaching navigable waters. Albarrie and Voltra Technology have partnered up to provide the power...

Reconditioned SF₆ Gas: An Environmentally Friendly Alternative

When it comes to medium and high voltage circuit breakers, there is no better electrical insulator than sulfur hexafluoride (SF6). The manufactured gas is most commonly used to fill circuit breakers within utility substations to prevent and quench arcing events. SF6's impeccable dielectric...

Safe Work Verified Through Data Logging Technology

On Distribution, Transmission or Substation equipment, testing for presence or absence of nominal voltage is mandated specifically by OSHA rule 1910.269(n)(5) which states “Testing. The employer shall ensure that, unless a previously installed ground is present, employees test lines and...

Reducing Nuisance Alarm Rates from On-Site Security Systems

The physical security of electrical generation, transmission, and distribution sites is critical. The potential risks of a security failure are clear: disruption to service, damage to equipment, and intruder fatalities.To prevent costly incidents and meet the National Electrical Reliability...

Vibration and Noise Control in T&D

It is very often that “just putting some rubber” to isolate structures creates an inefficient or even a vibration isolation problem, without taking into account the characteristics of the whole system: such as media environment and temperature, material stiffness adjusted to the...
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Zensol new instrument for OLTC testing

According to CIGRE A2.34, the dynamic resistance measurement or DRM (OFFLINE) is a test that offers diagnostics for several diverter or selector switch malfunctions such as: contact problems, broken springs, broken transition resistors, poor contact pressure, inadequate transition time, momentary open circuit, and synchronism motion issues.

Zensol’s DRM principle

Tap windings are powered with a DC voltage source. The current fluctuations are recorded during the switching process. The schematic below shows the principle of the...

T&D Products Articles

Sediver TGI
Electrical transformer design and manufacturing
PFT – 503CM
Mirus International ULLTRA(TM) graph
Tangent Test Setup

T&D Buyer’s Guide Companies

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Critical Power Solutions

PTS Series Product Training

How Current Limiting Protectors Work: A Simple Explanation

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AEMC 5050 5kV Megohmmeter

HYDRAULIC TOOLS

NERC Reporting for Circuit Breakers and Transformers

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Electrical Motors & Drives Handbook Vol. 3

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Electricity Today T&D Magazine - Linemen Safety September&October 2022 Special Edition