Skip to content

Training course: Overhead lines OHL

Course summary

The OHL training course covers all electrical, mechanical, structural and civil aspects with respect to the design of overhead lines. Electrical aspects include insulation coordination, earthing, EMF and EMC. From a mechanical point of view, tower strength, stiffness and dynamics are addressed. The course also examines line routing and tower spotting, tower foundations, as well as installation and maintenance issues. A case interactive design will enable participants to immediately put what they have learned into practice.

At the end of the training session, participants will also have an opportunity to test their newly acquired knowledge, dynamic effects, etc.

The last (optional third) day is a hand on design workshop in the electrical field. These examples are according to the real cases and help to understand all theoretical background better. Participants can ask their specific questions and discuss in detail the concept. A case interactive design will enable participants to immediately put what they have learned into practice.

Your benefits

This course provides participants with up-to-date information on the design of overhead lines, including line routing, tower types, electrical and mechanical aspects.

For whom?

This course is designed for anyone who is or will be involved in overhead lines in the course of their daily work. It is recommended - but not a requirement - that the participants have at least a Bachelor of Engineering degree or some prior knowledge of designing overhead lines.

Course topics

The following topics will be addressed:

- Introduction

- Tower types and families
  • Tower families, materials, installation
  • Foundations
  • Tower load calculation
- Line Routing
  • Surveying
  • Calculations and Checks
- Lightning performance
  • Theoretical background
  • Design performance
  • Lightning cases & examples
  • Practical examples
- Conductors
  • Type, material
  • Sag and Tension calculation
- Insulators and surge arresters
  • Insulator configuration
  • Insulator type
  • Dimensioning
  • Asset management
- Earthing
  • Theoretical background
  • Safety and design
  • Parameters influence earthing
  • Practical examples
- EMC and EMF
  • Theoretical background on Electric and Magnetic fields
  • Interferences
  • Disturbances
  • Practical examples

Practical information

For the following items, please refer to the registration form:

  • Course dates
  • Venue details
  • Registration fee
  • Payment and cancellation conditions

The training and all course materials will be in English. To encourage active participation, the number of participants is limited to 20. Click here for more information and to register for the upcoming course.

In-company and customised training courses

On request, DNV can also develop customized and in-company training courses. Content, location and duration of the course can be adapted to your specific needs.

For more information please contact us

Energy Academy
tel: +31 (0)6 29602659 / +31 (0)6 15063593 / +31 (0)6 18410601

A few responses from previous participants

  • ‘‘The training course on Overhead Lines (OHL) fits perfectly the needs of anyone having already a basic idea about OHL but wants to get a deeper insight.’’  - Chistian Möller, Tractebel Engineering GmbH
  • ‘‘Excellent course with very knowledgeable speakers, the course is about all the ins and outs of overhead power lines.’’  - Rob Dirven, ProRail

About DNV
DNV is the independent expert in risk management and assurance, operating in more than 100 countries. Through its broad experience and deep expertise DNV advances safety and sustainable performance, sets industry benchmarks, and inspires and invents solutions.

Whether assessing a new ship design, optimizing the performance of a wind farm, analyzing sensor data from a gas pipeline or certifying a food company’s supply chain, DNV enables its customers and their stakeholders to make critical decisions with confidence.

Driven by its purpose, to safeguard life, property, and the environment, DNV helps tackle the challenges and global transformations facing its customers and the world today and is a trusted voice for many of the world’s most successful and forward-thinking companies.

In the energy industry
DNV provides assurance to the entire energy value chain through its advisory, monitoring, verification, and certification services. As the world's leading resource of independent energy experts and technical advisors, the assurance provider helps industries and governments to navigate the many complex, interrelated transitions taking place globally and regionally, in the energy industry. DNV is committed to realizing the goals of the Paris Agreement, and supports customers to transition faster to a deeply decarbonized energy system.

Learn more at