11kV Substation Installation – Built for Growth
Whether you’re increasing site demand, developing a new industrial facility, or delivering major EV or renewable infrastructure, TriEnergi specialises in 11kV substation installation designed for safety, performance and long-term resilience.
As a NERS-accredited Independent Connection Provider (ICP), we deliver fully compliant 11kV substations including transformer installation, HV switchgear, protection systems, metering feeder pillars, 11kV cabling and terminations, and all associated contestable works — removing the complexity of coordinating directly with Distribution Network Operators (DNOs) while ensuring seamless integration with the existing network.
From feasibility and detailed design through to civil works, cable installation, jointing and terminations, we manage the complete build process. Our scope includes commissioning, protection testing, cable testing (pressure / VLF where required), and final energisation — ensuring your 11kV infrastructure is installed correctly, tested thoroughly and ready to support future load growth.
The result is a compliant, scalable and robust substation solution delivered safely, efficiently and with full technical accountability end-to-end.
Our 11kV substation installations are engineered for developments that demand dependable, high-capacity electrical infrastructure. Designed to support significant load requirements, these substations provide the resilience, safety and scalability required for commercial, industrial and energy-intensive sites.
Commercial & mixed-use developments:
Delivering dedicated 11kV supply with integrated transformer and LV distribution to support growing tenant demand, EV infrastructure and future expansion capacity.
Industrial & logistics facilities:
Providing robust high-capacity connections capable of supporting heavy plant, fleet electrification and process loads — without compromising operational continuity.
Energy & infrastructure projects:
Enabling seamless integration of on-site generation, battery storage or high-demand equipment through properly designed protection systems and compliant grid interfacing.
A typical 11kV substation scope includes transformer installation, HV switchgear, protection and control systems, metering feeder pillars, 11kV cabling and terminations, earthing systems, and all associated civil works. Every installation is fully tested and commissioned, including cable testing (VLF/pressure where required), protection testing and final energisation.
By investing in a professionally delivered 11kV substation, clients benefit from:
Future-proof scalability: Infrastructure designed to accommodate load growth and additional capacity.
Compliance & safety: Fully tested installations meeting DNO and NERS standards.
Operational reliability: Robust design, quality terminations and thorough commissioning to minimise downtime and risk.
This makes 11kV substations the ideal solution for organisations requiring secure, scalable and technically accountable power infrastructure built for long-term performance.
We provide fully managed 11kV grid connection services, covering contestable works, DNO liaison, cable installation and final energisation. As a NERS-accredited ICP, we ensure every connection is delivered safely, compliantly and in line with network operator requirements.
11kV cabling: Installation, jointing and terminations carried out to DNO specifications, ensuring long-term reliability and network integrity.
Switchgear connections: Integration of HV panels, ring main units and point-of-connection works to seamlessly interface with the existing network.
Metering feeder pillars: Installation and coordination of CT metering interfaces to meet statutory and operator requirements.
DNO liaison: Managing submissions, approvals and technical coordination to streamline programme delivery.
By controlling the full 11kV connection scope, we reduce complexity, accelerate timelines and maintain complete technical accountability from application to energisation.
Every 11kV installation is built on detailed engineering design and rigorous commissioning. Our structured approach ensures systems are safe, compliant and fully verified before going live.
Network design: Load assessments, cable sizing and infrastructure planning tailored to site demand and future capacity growth.
Protection coordination: Relay settings, fault level analysis and protection studies designed to safeguard both client assets and the wider network.
Earthing design: Calculated and installed to meet regulatory standards and ensure operational safety.
Testing & verification: VLF and pressure testing of 11kV cabling, protection testing and full functional checks prior to energisation.
All works are documented and certified in accordance with DNO and NERS standards, giving clients confidence in long-term operational performance.
As demand increases, infrastructure must evolve. We deliver 11kV capacity upgrades and reinforcement works that enhance available power while maintaining business continuity.
Transformer upgrades: Replacement or upsizing to accommodate increased load requirements.
Additional feeders: Installation of new 11kV circuits to support expansion or operational segregation.
Switchgear modernisation: Retrofit or replacement of ageing HV equipment to improve safety and reliability.
Infrastructure integration: Enabling EV charging, renewable generation or battery storage within existing 11kV networks.
By designing upgrades with scalability in mind, we ensure sites are prepared for long-term growth, electrification and evolving energy demands.