HV/EHV Cable Termination & Jointing — MV to 500 kV

Terminations and joints are a leading cause of cable failure. Poor preparation or contamination leads to PD and breakdown, often long after energisation.

• GIS plug-in and dry-type terminations
• Outdoor porcelain and composite terminations
• Straight, transition and sectionalising joints
• Cross-bonding and sheath systems
• Post-installation testing

• Cable and accessory data
• OEM accessory instructions
• Route and bonding design
• Access and outage plans

• Jointing and termination records
• Photographic records of each stage
• Sheath and insulation test results
• As-built records

1. Stage 1

   Preparation

   Check accessories, tools and environment.

2. Stage 2

   Installation

   Prepare and install per OEM instructions.

3. Stage 3

   Inspection

   Hold-point checks and records.

4. Stage 4

   Testing

   Sheath and withstand testing.

1. 1.Certified jointer performs work
2. 2.Supervisor inspects hold points
3. 3.Client witnesses where required

• DNSP connection and design standards (e.g. Ausgrid, Endeavour, Essential, Energex/Ergon, Powercor, SA Power Networks)
• TNSP requirements (e.g. Transgrid, Powerlink, AusNet, ElectraNet, TasNetworks)
• AEMO / National Electricity Rules Chapter 5 connection obligations
• Network operator access, switching and permit-to-work rules

• ITP with photographic hold points
• Environmental controls for cleanliness and humidity
• Jointer competency records

• Safety in Design (SiD) workshops and hazard register
• HV access, isolation and permit-to-work compliance
• Safe Work Method Statements for high-risk construction work
• Exclusion zones, step/touch potential and induced voltage controls

• Material efficiency and reduced site rework
• Waste segregation and recycling on site
• Embodied-carbon awareness in equipment selection

• Design decisions recorded against asset life-cycle cost (ISO 55001)
• Asset data and as-built records handed over in client asset-register format
• Maintainability and spares strategy considered at design stage

• GIS installation
• Civil and cable laying
• Testing teams
• Accessory OEMs

Indicative only — actual programme depends on scope, approvals and outage windows.