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3204: Development of a Condition Assessment Methodology for H-Frame Transmission Line Wood Crossarms

Transmission line supporting structures and their components in electric power systems have been subject to regular inspections in order to assess their condition and identify those in need of replacement or repair. In-service components such as wood crossarms are susceptible to deterioration that could result in loss of strength and potentially lead to unforeseen failures.Strategies for crossarm inspections vary considerably from organization to organization and are mainly developed based on in
May 1, 2006

OTE

Research

3207: Reliability Improvement Based on the Replacement of Defective Porcelain Transmission Line Insulators

Transmission lines insulated using porcelain insulators are designed, engineered, constructed, andoperated to meet specified reliability standards. However, the specified reliability standardsestablished by different utilities do not necessarily take into account insulator units which aredefective due to aging or manufacturing defects. Given the fact that there are built-in safety factorsin a string of insulators, the existence of some defective insulator units in insulator strings on a giventra
May 1, 2010

OTE

Research

3239: CPF: Best Practices for Transmission Line Insulator Condition Assessment

This project explores the current industry practice for transmission line insulator condition assessment in the field. Currently, there are a number of methods available to assess the condition of insulators. Each of these methods has strengths and weaknesses in its ability to identify defective insulator units or strings. This study identifies the pros and cons of each inspection method for the various types of insulators in use on transmission lines.Both literature review and the utility surve
Feb 1, 2012 - Dec 1, 2013

OTE

Research

3287: Maintenance Program Optimization - Best Practices

Maintenance programs are integral to the management of the ongoing performance and sustainability of every utility asset base, including transmission overhead line assets. Maintenance work typically consists of three types of activities: visual inspection, asset testing, and asset repairs. Outcomes from maintenance activities can result in (a) repairs of asset components as identified by visual inspection or testing results, (b) degradation factor data to support the computation of a health inde
Aug 17, 2020 - May 27, 2024

OTE

Research

3275A: CPF: Standardization of OHTL Inspection Data Collection (Mobile Applications)

This report details consensus specifications and requirements for inspection data collection for routine patrols of Overhead Transmission Lines (OHTLs). This is part of a multi-phase project to accommodate the potential interests of different utilities. For example, some utilities already have mobile IT in place, or are in the process of developing such systems, and therefore are primarily interested in refining their existing inspection data collection requirements (based on the information dev
Feb 27, 2017 - Mar 15, 2018

OTE

Research

3275B: CPF: Standardization of Overhead Transmission Line Inspection Data

A multi-phase project was implemented to accommodate the interests of different CEATI member utilities. For example, some member utilities have implemented or are developing mobile IT systems and are primarily interested in refining their existing inspection data collection requirements (Phases I and II) versus implementing new inspection applications (Phase III). The Phase II report – an addendum to the Phase I report – can be divided into three interrelated categories which help es
Mar 1, 2018 - Sep 1, 2018

OTE

Research

3261: CPF: Unmanned Aircraft System (UAS) Inspection Methods and Data Collection for Transmission Lines

With the increasing technological advances of Unmanned Aerial Systems (UAS), an initial assessment of the changing environment of UAS-aided transmission line inspection was conducted. This report presents the findings of a focused scope investigation of the state of UAS capabilities with respect to transmission line inspection, as well as a survey of the current UAS usage among utilities. Traditional (manned aircraft and ground based) transmission line assessment methodologies are reviewed, and
May 15, 2015 - May 15, 2016

OTE

Research

3266: CPF: Transmission Line Defect Rating Criteria and Methodology for Rating Defects

This report addresses asset managers' need for consistent reporting of defects by inspectors. Five defect categories are used to categorize component condition, ranging from ‘New’ to ‘Failed’. A set of photos showing typical component conditions was assembled for each component and category within that group. The photo galleries cover all visual condition aspects for above ground component groups. Some defect conditions may require laboratory evaluation and the visual con
Feb 16, 2016 - Sep 21, 2017

OTE

Research

3258: Evaluation of Transmission Line Steel Structure Coatings

This study presents a state-of-the-art review on maintenance practices and coating systems for protecting the above-ground portion of steel transmission tower structures from corrosion. Information was obtained from a variety of sources: (1) a survey of major international electric utilities, (2) technical data and product recommendations provided by coating suppliers, (3) recent standards issued by NACE, IEEE, and ISO, and (4) published electric utility case studies. The best practices for stee
Jan 27, 2015 - Nov 9, 2017

OTE

Research

3294: Updated Guideline on Best Practices for Inspection and Data Collection

May 26, 2023 - Jun 30, 2023

OTE

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