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3036: High Voltage Disconnect Switch Asset Management

The objective of this project was to gather and summarize information required for, as well as proven and practical approaches and tools important to, High Voltage Disconnect Switch Asset Management and to enable participating LCMSEA utilities to learn from worldwide experience on the subject.By means of a literature search and critical review, a user survey, and input from disconnect switch technical experts, the report provides a comprehensive overview of industry practices.Keywords: Disconnec

Aug 1, 2005

Research

30108: Specification Guide for Medium & High Voltage Disconnect and Ground Switches

This document serves as a guide for selecting and compiling comprehensive technical specification requirements for disconnect and ground switches rated from 5kV to 800kV that are generally used in air insulated substations. Typical electrical ratings, performance, and test requirements are covered with considerations for operational, environmental, and safety features. Guides for preparing a Detailed Rating Specification, and a Form of Tender are also provided. A summary of the primary reference

Aug 13, 2015 - Jun 8, 2016

Research

3020: Safety Protocol for Restoration of Substations Involved with Fires/Explosions

In the event of a fire or explosion, some materials typically found in substations may form hazardous by-products. This report identifies these materials and presents a safety protocol for the sampling and cleanup of the atmosphere, equipment and debris following a fire or explosion in a substation. This safety protocol may be used by electrical utilities as a guide in the development of their own secondary response plans and procedures.Keywords: Substation, fire, explosion, safety, toxic, decon

Nov 1, 2004

Research

30140: Enhancing End-of-Life Assessment of Power Transformers

This report summarizes the main findings from available literature and subject matter expert feedback regarding health condition and end-of-life metrics for power transformers. The transformer itself (i.e., windings and tank) has several properties that can be used to assess its current health and estimate its remaining life. However, other components and accessories that are directly attached to the transformer are just as important to assess as part of the transformer’s health and life expecta

Jun 25, 2020 - Oct 12, 2023

Research

3055C: Health and Risk Index Tool for Current Transformers, Potential Transformers, Surge Arresters, and Capacitors

VOLUME 1 - HEALTH AND RISK INDEX TOOL FOR SURGE ARRESTERSThis report describes the health degradation modes of surge arresters employed in transmission and distribution stations, reviews the best industry practices for inspection and testing of surge arresters and provides a methodology for determining their health and condition. Guidelines are also provided for the use of the condition assessment tool and interpretation of the results.Keywords: Surge Arrester, Lightning Arrester, Station C

Nov 29, 2011 - Dec 24, 2013

Research

3030: Identifying and Documenting Existing Substation Ground Grid Detectors

Grounding grids can deteriorate over time. Stresses typically include high magnitude fault currents,unbalanced load current, soil chemistry leading to corrosion, trenching by contractors’ installation offootings or pipelines, and (all too frequently) the theft of copper. This report documents a literaturesearch, utility survey, review of instruments, procedures and industry best practices to identifydeficiencies in the integrity of ground grid conductors, equipment and structure grounds, a

Nov 1, 2006

Research

30121: Systematic Approach to Evaluate and Compare Asset Renewal and Capacity Upgrade Projects

As they contemplate allocation of their available capital investment budgets, transmission and distribution utilities are often required to consider the implications of investing their finite resources into functionally different types of projects while simultaneously deferring investments in others. This report proposes a theoretical methodology and practical model for helping utilities prioritize among two types of capital projects of comparable monetary value – namely, system renewal pr

Jun 27, 2017 - Apr 30, 2019

Research

3061: Methanol: A New Marker for Paper Ageing

This report describes the correlation between the chemical markers dissolved in oil with the degree of cellulose polymerization from real transformers; these samples were collected when the transformers were scrapped. Methanol, a new maker that is directly generated with the scission of the cellulosic bond, is included in this study. The author also presents the correlation for other markers such as 2-furfuraldehyde (2-FAL) and carbon oxides for the eight cases reported here. As in the laborator

Feb 1, 2010 - Jul 25, 2014

Research

3027: MV and HV Air Break Disconnect Switch Arc Reach Study

Air break disconnect switches are normally used to provide visible isolation of electrical equipment that has been switched off potential by other means. These switches have limited capability to interrupt current and voltage that can be efficiently and safely exploited by utilities. However, the evaluation of this capability has been constrained for many years by models based on limited test results carried out in the 1950s. An industry survey establishes existing practices and develops a nu

Jan 1, 2007

Research

30138: Gas Insulated Substations: Design, Commissioning and Maintenance Practices

A Gas Insulated Substation (GIS) is a High Voltage substation in which the major structures are contained in a sealed environment with mostly sulfur hexafluoride (SF6) gas as the insulating medium. The clearance required for phase-to-phase and phase-to-ground for all equipment is much lower than that needed for an air-insulated substation (AIS).Faced with increasing demands for reliability, improved aesthetics, and security, the adoption of GIS by utilities is rapidly growing. There is presently

Jul 16, 2019 - Jan 17, 2024

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