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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...

Calculation of Capacitance Matrix in Electrical Systems

In typical electrical systems, the capacitance between multiple conductors is of primary interest. To facilitate calculations, it is possible to arrange the mutual capacitances of a system of N conductors in a matrix format. For precise calculations of capacitance matrices in electrical systems,...

Transformer Diagnostic Testing

Transformer diagnostic testing: standards to diagnose equipment with Sweep Frequency Response analysis BY VOLNEY NARANJO, Megger Sweep Frequency Response Analysis (SFRA) has become a powerful tool in advanced power transformer assessments and probably one of the main and first tools used to...
Substation Testing

Circuit Breaker Lubrication

Developing circuit breaker lubrication procedures BY RICK YOUNGBLOOD, Doble Engineering Company Circuit breaker analyzers are used to determine operating speeds and velocity. This information enables the tester to determine if a breaker is safe to place back into service. The data recorded by a...
Home HV Testing

HV 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 issues such as moisture ingress, animal intrusion, enclosure rusting, and insulation deterioration. One efficient approach to detect incipient failures is partial discharge (PD), a leading indicator of various failure modes. Using both acoustic and...

HV Test Equipment Articles

MRVI
ultrasound equipment
MV HV cable partial discharge measurement

T&D Buyer’s Guide Companies

HV Testing Videos

ON-GUARD Automated Lubrication System

ULTRAChecker for Operator Driven Reliability

PFT Series Product Training

HV Testing Products

LUBExpert - Handheld Lubrication and Ultrasound Monitoring

M4100 Power Factor/Tan-Delta instrument - High Voltage Apparatus Tester

SDT340 Multifunctional Data Collector

HV Testing Shared Media

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Electrical Testing & Maintenance Handbook Volume 5

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Electricity Today T&D Magazine - Reliable Power Testing January&February 2021 Special Edition

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Electrical Maintenance Handbook, Vol. 10