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30131: Asset Intelligence for Root Cause Failure Analysis

This report is a comprehensive guide for performing a structured Equipment Root Cause Failure Analysis (ERCFA), with specific emphasis on substation equipment. It provides guidance on performing an ERCFA, including the tools to use, and how and when to use them. It includes checklists for the data sources needed for major substation equipment categories at the start of an ERCFA investigation. It also provides as an example an actual ERCFA that was performed for a loss of all DC control power eve

Mar 5, 2019 - Oct 5, 2019

Research

3068: Power Circuit Breaker Reference Document

High voltage power circuit breakers installed on the power system are required to perform a wide range of switching and protective duties. These duties range from interrupting high fault currents of up to 80 kA down to the relatively low currents associated with switching loads, transmission lines and cables, and shunt capacitor and reactor banks. A very limited number of high voltage circuit breakers having exceptionally high short circuit ratings of 87.5 kA and 100 kA have been installed

Apr 1, 2010

Research

3074: Contingency Planning Criteria: On-Site or Off-Site Spare Equipment, Components, and Mobile Equipment

The objective of this project was to identify the criteria utilities use when developing their strategies for the selection and management of spare equipment and spare components for major equipment. As part of the project, a utility survey and literature search were undertaken to gather information on this topic. The survey also included the strategy applied when preparing for emergency restoration of failed equipment such as transformers and circuit breakers and how the use of redundancy desig

Sep 1, 2011 - Jul 1, 2013

Research

3048: Short-Circuit Design Requirements for Power Transformers

The objective of this report was to develop and deliver generic guidelines to increase the likelihood that manufacturers deliver power transformers with adequate short-circuit withstand capabilities. In addition, to complement the generic guidelines in ensuring an adequate short-circuit performance of power transformers, PowerNex Associates Inc. (PNA) developed and documented a process to facilitate utility interactions with manufacturers on short-circuit capability issues. Last, but not least

Jul 1, 2008

Research

3043: Review and Summary of Key Standards and Guides for Station-Class Power Transformers

This project was developed to help utility engineers quickly identify and review the key standards and guides applicable to specific topics being faced by utility staff. Key standards and guides related to station liquid-filled power transformers have been identified and summarized. Key topics and sub-topics relevant to power transformers have been developed and related to each of the summarized standards (using a relevance matrix). A comparison of North American and worldwide standards has been

Jun 1, 2008

Research

30101: State-of-Art Study Review of Room Temperature Vulcanizing (RTV) Coatings and Silicone Grease for Substation Porcelain-Insulated Equipment Applications

The CEATI project consisted of formulating a Technical Product Resource and Inspection Guide for HV Insulator Coatings (HVIC) that will help utility field personnel and contractors. The project scope included a literature review of available technical and field application information to establish a basis from which to work with regards to RTV and Silicone Grease coatings. Service experience was obtained by undertaking a technical survey of utilities that presently use HV insulator coatings. Man

Dec 1, 2014 - Jun 6, 2015

Research

3030B: Ground Grid Corrosion

The objective of this study was to identify the factors contributing to the corrosion of ground grid systems at electrical substations and the technologies available to minimize those factors.The work included an extensive literature search and utility survey conducted in North America. The report discusses corrosion theories applicable to ground grids, as well as related corrosion examples and the experience of other industries. The report addresses the conditions contributing to ground grid co

Jul 1, 2009

Research

3055B: Health and Risk Index Tool for Circuit Switchers, Switches/Disconnects

This report describes the health degradation modes for different categories of circuit switchers employed on transmission and distribution systems, reviews the best industry practices for inspection and testing of circuit switchers and provides a methodology and a software tool for determining the health and condition of circuit switchers. Guidelines are also provided for the use of the condition assessment tool and interpretation of the results. Keywords: Circuit switchers, Transmission and di

Sep 1, 2010 - Apr 14, 2012

Research

30145: Simulation Study of Safe Grounding Methods for the Operation of High Voltage Disconnect Switches

High-voltage (HV) disconnect switches are typically operated without incidence; however, each operation presents an increased risk for flashover. When a flashover occurs, the worker operating the switch can experience a potentially hazardous voltage (exposure voltage) across their body. Despite extensive discussions in the industry, the best switch grounding method to limit the exposure voltage experienced by the operator has yet to be established.This report on safe grounding methods, covering

Aug 24, 2022 - Feb 26, 2025

Research

3001: Accelerated Aging Test for Elastomer-Based Gasket Materials

The majority of large electrical equipment is oil-filled. The oil serves as both coolant and the primary electrical insulating medium. Typically, this equipment is in welded steel housings, with openings for access, connections, etc. Soft gaskets are installed around all of these openings, to prevent leakage. Good gasket materials will maintain an oil-tight seal for the life of the equipment, or at least until disassembly is eventually needed.Too often, the materials chosen fail during in-servic

Jan 1, 2001

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