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LV & HV Electrical Installation

What we offer

Complete End-to-End Electrical Connection Solutions

At Paragon Energy Networks, we provide a comprehensive end-to-end solution for new LV & HV electrical connections from initial enquiry through to design, construction, and commissioning of the electrical infrastructure. Our installation capabilities encompass the complete spectrum of high-voltage electrical systems, ensuring seamless integration with both the distribution network and your facility’s internal electrical systems.

Our installation teams combine technical expertise with practical experience, enabling efficient project delivery while maintaining the highest standards of safety and quality. We coordinate closely with Distribution Network Operators, local authorities, and other stakeholders to ensure smooth project implementation and minimal disruption to existing operations.

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Primary And Secondary Substation Construction

We specialize in the construction of both primary and secondary substations, including:

Complete civil engineering works, including foundations and bunds
Substation building construction or prefabricated enclosure installation
Internal substation layouts and equipment mounting
Earthing system installation and testing
Fire protection system implementation
Security systems and access control
Auxiliary power supply installation
Compliance with ENA technical specifications and DNO requirements
Comprehensive testing and commissioning

HV Switchgear Installation And Configuration

Our teams are experienced in the installation and configuration of various HV switchgear types, including:

Air-insulated switchgear (AIS)
Gas-insulated switchgear (GIS)
Vacuum and SF6 circuit breakers
Ring main units (RMUs)
Motorized switch disconnectors
Protection relay panel installation
Control system integration
SCADA interface implementation
Factory acceptance test coordination
Site acceptance testing and commissioning

Underground Cable Installation

We provide comprehensive underground cable installation services using various techniques:

Open-cut trenching with appropriate reinstatement
Directional drilling for obstacle crossings
Cable ducting systems installation
Direct buried cable installation
Cable pulling and management
Termination and jointing up to 33kV
Cable route marking and protection
Testing and certification to BS 7671
As-built documentation and route records
Thermal resistivity testing when required

Transformer Installation And Testing

Our transformer installation services include:

Pad-mounted transformer installation
Oil-filled transformer handling and processing
Dry-type transformer installation
Tap changer setting and verification
Temperature monitoring system installation
Cooling system installation and testing
Oil sampling and analysis
Partial discharge testing
Ratio and vector group verification
Comprehensive commissioning tests

Protection Relay Programming And Testing

We provide specialized protection system services including:

Protection relay programming to scheme requirements
Secondary injection testing of protection functions
Primary injection testing of complete protection schemes
Relay setting verification against coordination studies
Protection scheme functional testing
Communication system integration and testing
Disturbance recorder configuration
Protection scheme documentation
Client training on protection system operation
Periodic maintenance testing programs

Full System Commissioning To G99 Standards

Our comprehensive commissioning services ensure your electrical system meets all regulatory requirements:

Systematic pre-commissioning checks
Phasing verification and rotation checks
Insulation resistance testing
Contact resistance testing
Functional testing of all control systems
G99 compliance testing and documentation
DNO witness testing coordination
System energization procedures
Post-energization monitoring
Handover documentation and training

Project Approach

Our installation approach follows a structured methodology:

Pre-construction Planning: Detailed review of design documentation, site surveys, and resource allocation

Safety Planning: Development of comprehensive risk assessments and method statements

Material Procurement: Sourcing of high-quality components meeting project specifications

Construction Phase: Systematic implementation according to approved designs
Quality Control: Continuous inspection and verification against standards
Testing & Commissioning: Comprehensive testing of all installed systems
Documentation: Detailed as-built records and operation & maintenance manuals
Handover: Formal transfer of completed systems with client training

This systematic approach ensures your electrical infrastructure is installed to the highest standards of safety, reliability, and efficiency.

Our Services

Electrical Systems Design

Our in-house team of chartered electrical design engineers specializes in HV power system analysis and infrastructure design across diverse sectors and projects. Our comprehensive design capabilities include: Load flow analysis and power quality assessment Fault level calculations and protection coordination studies Earthing system design and soil resistivity testing Cable sizing and voltage drop calculations Switchgear specification and selection Transformer sizing and specification Single line diagram development Protection relay coordination and settings G99 compliance documentation DNO application support and technical submissions Our analytical approach to electrical design ensures that your infrastructure is optimized for performance, compliance, and future expansion. We utilize advanced power system modeling software to simulate various operational scenarios, ensuring your electrical system performs reliably under a

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LV & HV Electrical Installation

Paragon Energy Networks provides complete end-to-end solutions for new LV & HV electrical connections, from initial consultation through to final commissioning. Our installation expertise includes: Primary and secondary substation construction HV switchgear installation and configuration Underground cable installation using various techniques Overhead line construction and maintenance Transformer installation and testing Protection relay programming and testing Full system commissioning to G99 standards Earthing system installation and testing Cable termination and jointing up to 33kV Substation civil engineering works Our installation teams are fully qualified and experienced in working with various switchgear manufacturers, cable types, and protection systems, ensuring seamless integration of your electrical i

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Electrical Vehicle Chargers

We design and install comprehensive EV charging infrastructure to support your organization's electric vehicle strategy. Our specialized EV charging solutions include: Site electrical capacity assessment Load management system design HV infrastructure upgrades for high-capacity charging Commercial charging station installation Integration with renewable energy systems Future-proofing for expanded capacity Smart charging system implementation Back-office system integration Compliance with IET Code of Practice Ongoing maintenance and support packages Our approach ensures your EV charging infrastructure is reliable, scalable, and integrated effectively with your e

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Contestable Connections

As an accredited ICP under the Lloyds Register NERS scheme, we deliver competitive contestable connections that offer significant advantages over traditional DNO services. Our contestable connection expertise includes: Point of Connection (POC) applications and management Design approval coordination with DNOs Complete installation of contestable works Substation civil engineering and construction Final testing and adoption arrangements Post-connection documentation and support Asset adoption negotiation and management Wayleave and easement coordination Project-specific DNO engagement strategies Alternative connection arrangement assessment Our status as a fully accredited ICP enables us to deliver cost-effective, timely power infrastructure that meets all regulatory requirements while providing significant cost and s

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LV & HV Installation FAQ

Have questions about our LV and HV electrical installation services? Explore our FAQ section for clear and concise answers about our processes, safety standards, certifications, and more.

What is the difference between LV and HV electrical installations?

LV (Low Voltage) installations typically deal with voltages up to 1kV, while HV (High Voltage) installations involve voltages above 1kV, often up to 33kV or more. HV installations require specialized equipment and safety protocols due to the higher voltage levels.

What does the LV & HV electrical installation process involve?

The process includes everything from site assessment, cable laying, substation installation, to final connection to the Distribution Network Operator’s (DNO) network. We handle each step with precision to ensure safety, compliance, and reliable operation.

What is the role of a secondary substation in electrical installations?

A secondary substation is used to reduce voltage levels and distribute power to local areas. It’s a key component in ensuring the safe and efficient flow of electricity from high-voltage transmission systems to lower-voltage distribution systems.

How long does it take to complete an LV or HV electrical installation?

The duration depends on the complexity of the project. For example, simpler LV installations may take a few days, while more complex HV projects could take several weeks. We provide detailed timelines during the planning stage.

What are cable jointing and termination services?

Cable jointing involves connecting two cables to form a continuous power network, while termination refers to safely connecting the ends of cables to electrical equipment or junctions. Both processes ensure the integrity and safety of the electrical system.

What are diversion works for LV and HV cables?

Diversion works are required when existing cables need to be rerouted to avoid obstructions or accommodate new developments. We manage the entire diversion process to minimize disruption and ensure compliance with safety standards.

Do you handle both installation and maintenance of LV & HV systems?

Yes, we offer both installation and maintenance services for LV and HV electrical systems. Regular maintenance ensures that systems remain reliable, safe, and efficient throughout their lifecycle.

Are your installations compliant with industry standards?

Absolutely. All our installations comply with industry standards, including NERS accreditation, ensuring that our work meets the highest safety and regulatory requirements.

What safety measures are in place for LV and HV installations?

We follow strict safety protocols, including the use of personal protective equipment (PPE), risk assessments, and adherence to regulatory safety standards to ensure the safety of both our team and your property.

Our Industry Certifications

Our company is proud to hold full NERS accreditation, ensuring we deliver safe, reliable, and high-quality electricity connections up to 33kV. This certification reflects our commitment to technical excellence and industry-leading standards in HV electrical engineering.

These accreditations verify our capability to design, install, and commission complex electrical infrastructure to the highest technical standards, giving our clients complete confidence in our expertise and the quality of our work.

Got a project? Reach out

Fill out the form, and let us demonstrate how our expertise and accreditation ensure reliable connection solutions. Our team will reach out to provide tailored advice for your electricity connection project.