Overhead Network Upgrade – Horsley Park



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Introduction

As part of an ongoing network construction project for a NSW power authority, UEA Electrical was engaged to replace poles and overhead conductor along Horsley Road, Horsley Park, NSW in order to improve network reliability.

The project was constructed in four distinct stages with a number of challenges to be addressed due to the network configuration. Extensive and detailed planning was required to deliver the necessary scope of works within four limited outages.

Particular attention was spent on traffic and pedestrian management, as is the case with all overhead network construction projects. Working with multiple large plant, equipment which is generally positioned between the footpath and roadside alignment, the safety of public and traffic is paramount. Flow of traffic, pedestrian access and driveway access are key areas of focus whilst constructing large work packets in a limited timeframe.

Electrical Construction

Outage 1: This planned outage proved the most challenging with the town centre being affected by this particular interruption to normal electricity supply. Due to network configuration, timely planning was undertaken to ensure that the impact on the community and its stakeholders was reduced for the best possible outcome. Lengthy negotiations and strong communication protocols ensured the success of this difficult outage.

This process was planned diligently and the execution of the works was completed early within a tight timeframe. Preparation was the key to success prior to the day. The scope for this outage was designed to interrupt this section of the network one time only which meant multiple crews performing multiple tasks during the first outage, including:

  • 4x pole changes
  • Underslung link installation
  • 7 bays of HV conductor augmented
  • Low voltage transfer to new poles
  • Removal of redundant poles

Outage 2: The second outage was much simpler with fewer challenges. Regardless of the simpler scope of works for this outage, preparation and communication remained paramount at all times and this resulted in timely delivery of the work scope which consisted of:

  • 3x pole changes
  • 1x Air Break Switch installation
  • Low voltage changeover
  • Removal of redundant poles

Outage 3: The third outage was very similar to outage two with a total of four poles being replaced. Although the scope for this outage was simple, there were issues with dewatering as the pole locations were below the level of an adjacent dam. This was resolved by utilising UEA’s vacuum excavator and removing the water concurrently to the pole foundation being installed. Scope of works included:

  • 4x pole changes
  • 1x Air Break Switch installation
  • 1x High Voltage Under Slung Link installation
  • Low voltage changeover
  • Removal of redundant poles

Outage 4: The final outage comprised of augmenting the final eleven bays of overhead conductor along with removal of the final redundant poles.

Conclusion

The Horsley Road Overhead Network Upgrade possessed all of the key challenges that are typically experienced during overhead network construction works. Through planning, communication and preparation, the project was delivered safely, on time and to the highest standard.

For more information about this project or UEA Electrical, please send enquiries to Mark Bampton.