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HV Test Equipment

IR Inspection Windows for Electrical System Reliability

An Infrared Inspection Window is used to separate environments of differing pressures or temperatures while allowing light energy at a specified electromagnetic wavelength to pass between the two environments. They must meet the strength and environmental requirements for the type of equipment in...

Why Net-Zero is Cheaper for the UK

The United Kingdom has set an ambitious target to achieve net-zero greenhouse gas emissions by 2050. This goal necessitates a comprehensive transformation of various sectors, including energy, transportation, and agriculture. While the environmental imperatives are clear, there is growing evidence...

Line Leakage Testing: Is It Right For Your Application

The Line Leakage test (LLT for short) is most often specified to be performed as a type test in a design or engineering laboratory or as a routine production line test on medical devices right before they ship. Not as commonly performed as a Dielectric Withstand or Ground Bond test in a production...
Breaker Testing

Partial Discharge & Circuit Breaker Asset Management

Detecting and avoiding preventable failures BY JAY GARNETT, Doble Engineering Company While metal clad switchgear can be very reliable, sometimes operating for over 50 years, throughout the aging process, this group of electrical disconnect switches, fuses and circuit breakers can experience...

The Dissolved Gas Analysis Toolkit

Dissolved gas analysis: addressing the challenges of collecting samples BY DONAL SKELLY, GE’s Digital Energy business Dissolved gas analysis (DGA) is a technique for identifying and quantifying the gas formed in oil-filled electrical equipment because of either the natural aging of oil and paper...

FERC Complaint Targets Duke, PJM Transmission Planning

A coalition of large energy consumers and ratepayer advocates has filed a complaint with the Federal Energy Regulatory Commission (FERC), urging the agency to prohibit transmission owners from independently planning "local" transmission projects exceeding 100 kilovolts (kV). The coalition argues...
Home HV Testing

HV Testing

Power Factor Testing of Circuit Breakers

Detecting contamination and deterioration in SF6 breakers to ensure longevity

BY LINDA NOWAK, Doble Engineering Company

The purpose of “Doble testing”, or power factor testing, SF6 (sulfur hexafluoride) circuit breakers is to detect the presence of contamination and/or deterioration of the breaker’s insulating system. This process will allow corrective actions to be taken to ensure the integrity of the breaker.

The Doble test is completed by measuring the insulation’s dielectric-loss and capacitance and...

HV Test Equipment Articles

PFT – 503CM
FLIR Thermal Camera T860
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MRVI

T&D Buyer’s Guide Companies

HV Testing Videos

ULTRAChecker for Operator Driven Reliability

SDT340 Ultrasound Data Collector

Bearing Toolbox for Advanced Bearing Failure Analysis

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TB44 Series

PT17 Series

SDT340

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Electrical Testing & Maintenance Handbook Volume 5

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SDT340

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Electrical Maintenance Handbook, Vol. 10