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Field Vibration Measurement in Overhead Transmission Lines: A Complete Guide

1 Comment / Electrical Design / OHTL DESIGN

Overhead Transmission Lines (OHTLs) are critical assets in any power transmission network. While their design ensures reliability and efficiency, one of the persistent challenges they face is wind-induced vibration. These vibrations, if left unchecked, can lead to fatigue damage, conductor strand failures, and premature aging of fittings. This is where field vibration measurement becomes vital. […]

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PLS-CADD Software Interface: A Step-by-Step Guide for Beginners

8 Comments / Electrical Design / OHTL DESIGN

Introduction: What is PLS-CADD and Why is It Important? PLS-CADD (Power Line Systems – Computer Aided Design and Drafting) is an advanced engineering software widely used for the design and analysis of power transmission lines. From terrain modeling to structure placement, this software helps engineers create accurate, safe, and cost-effective transmission lines. In this guide,

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Bore Hole Location Plan in Transmission Line Projects – A Complete Guide

2 Comments / Electrical Design / OHTL DESIGN

When it comes to Overhead Transmission Line (OHTL) design, one of the most crucial steps before foundation design is the preparation of a Bore Hole Location Plan. This drawing ensures proper planning for soil investigation at exact tower locations, helping engineers design safe and cost-effective foundations for both suspension and tension towers. In this article,

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Access Road Construction in Overhead Transmission Lines (OHTL): Subgrade, Sub-base & Surface Course Requirements

Leave a Comment / Civil Articles / OHTL DESIGN

Keywords: Access Road in OHTL, OHTL access road construction, subgrade CBR requirements, SEC standard TES-P-122.11, sub-base layer, surface course, civil works for transmission lines, access road layers, road compaction standards What is an Access Road in OHTL Projects? An Access Road in Overhead Transmission Line (OHTL) projects is a specially designed route that enables the

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BBS and Concrete Volume Calculations for Pier Foundations in Overhead Transmission Line (OHTL) Projects

Leave a Comment / Civil Articles / OHTL DESIGN

Introduction In Overhead Transmission Line (OHTL) projects, pier foundations are commonly used in river crossings, steep terrain, or rocky soil conditions. Accurate Bar Bending Schedule (BBS) and Concrete Volume Calculations ensure the foundations are structurally sound, cost-effective, and executed with precision. This guide provides: BBS (Bar Bending Schedule) for Pier Foundation Why Prepare BBS? Step-by-Step

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What is California Bearing Ratio (CBR) in OHTL Foundation Design?

3 Comments / Civil Articles / OHTL DESIGN

Understanding California Bearing Ratio (CBR) in Overhead Transmission Line Projects When designing overhead transmission lines (OHTLs), one of the most critical steps is ensuring the soil can safely bear the load of transmission tower foundations. The California Bearing Ratio (CBR) test is a widely used method to evaluate this. What is CBR? CBR stands for

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HVDC overhead transmission line suspension tower and its key components

2 Comments / Electrical Design / OHTL DESIGN

𝐇𝐢𝐠𝐡 𝐕𝐨𝐥𝐭𝐚𝐠𝐞 𝐃𝐢𝐫𝐞𝐜𝐭 𝐂𝐮𝐫𝐫𝐞𝐧𝐭 (𝐇𝐕𝐃𝐂) 𝐭𝐫𝐚𝐧𝐬𝐦𝐢𝐬𝐬𝐢𝐨𝐧 𝐭𝐞𝐜𝐡𝐧𝐨𝐥𝐨𝐠𝐲 𝐢𝐬 𝐢𝐧𝐜𝐫𝐞𝐚𝐬𝐢𝐧𝐠𝐥𝐲 𝐮𝐬𝐞𝐝 𝐢𝐧 𝐦𝐨𝐝𝐞𝐫𝐧 𝐩𝐨𝐰𝐞𝐫 𝐬𝐲𝐬𝐭𝐞𝐦𝐬 𝐟𝐨𝐫 𝐥𝐨𝐧𝐠-𝐝𝐢𝐬𝐭𝐚𝐧𝐜𝐞 𝐛𝐮𝐥𝐤 𝐩𝐨𝐰𝐞𝐫 𝐭𝐫𝐚𝐧𝐬𝐟𝐞𝐫, 𝐢𝐦𝐩𝐫𝐨𝐯𝐞𝐝 𝐞𝐟𝐟𝐢𝐜𝐢𝐞𝐧𝐜𝐲, 𝐚𝐧𝐝 𝐠𝐫𝐢𝐝 𝐢𝐧𝐭𝐞𝐫𝐜𝐨𝐧𝐧𝐞𝐜𝐭𝐢𝐨𝐧𝐬.The image below depicts a typical HVDC overhead transmission line suspension tower and its key components. Optical Ground Wire (OPGW) Located at the top of the tower, the OPGW serves a dual

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What Is Soil Investigation?

Leave a Comment / Civil Articles / OHTL DESIGN

Soil investigation is a critical step in the planning and construction of overhead transmission lines (OHTLs). It involves analyzing the soil properties at proposed tower foundation sites to ensure structural stability and safety. Proper soil investigation helps engineers determine the soil bearing capacity, type, moisture content, and potential issues like erosion or settlement. This information

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What is the Structure List in Overhead Transmission Line?

Leave a Comment / Electrical Design / OHTL DESIGN

In Overhead Transmission Line (OHTL) design, a Structure List is a vital document that outlines the type, location, and quantity of transmission structures required along the route. It includes data such as structure numbers, types (tangent, suspension, tension, angle), span lengths, and ground elevations. The structure list is typically generated after finalizing the line profile

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