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Electrical Systems Design

Electrical Systems Design

Expert HV Power System Analysis & Engineering

Paragon Energy Networks delivers comprehensive electrical systems design services for high-voltage infrastructure projects across Scotland. Our chartered electrical engineers specialize in power system analysis, protection coordination, and complete HV network design for industrial, commercial, and renewable energy applications.
What we offer

We design your electrical infrastructure

Our in-house team of chartered electrical design engineers possesses extensive expertise in the design and implementation of electrical distribution systems across diverse sectors and projects. Our analytical approach to electrical design ensures that your client brief is thoroughly assessed and understood before we develop innovative solutions.

 

We conduct comprehensive assessments of your electrical infrastructure requirements at each stage of the project lifecycle, from initial feasibility studies through to detailed design, construction documentation, and commissioning support. This methodical approach ensures that your electrical systems are optimized for performance, compliance, and future expansion capabilities.

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Load Assessment of the Network

Our power system analysis begins with detailed load assessments to determine your current and future electrical requirements. We utilize advanced modeling software to analyze load profiles, calculate demand factors, and determine optimal transformer and switchgear ratings. This comprehensive approach ensures your electrical infrastructure is correctly sized while maintaining compliance with Engineering Recommendation P28 and G5/5 for harmonics and voltage fluctuations.

Complete Design Downstream of the DNO’s Point of Connection

We provide complete electrical system design from the Distribution Network Operator’s point of connection through to your facility’s internal distribution network. Our design services include:

– Single line diagram schematic development with protection coordination
– Switchgear specification and selection
– Transformer sizing and specification
– Cable sizing calculations considering fault levels and voltage drop
– Protection relay coordination and settings
– Earthing system design to BS EN 50522
– G99 compliance documentation and technical submissions
– Detailed construction drawings and specifications

Electrical Characteristics Analysis

Our electrical characteristics analysis encompasses comprehensive power quality assessment, harmonic studies, and system stability analysis. We evaluate voltage regulation, power factor correction requirements, and harmonic filter design when necessary. This detailed analysis ensures your electrical system operates efficiently while maintaining compliance with DNO requirements and relevant standards including Engineering Recommendation G5/5.

Grading Studies of Protective Devices

We conduct detailed protection coordination studies to ensure selective operation of protective devices throughout your electrical network. Our grading studies include:

– Fault level calculations at all significant points
– Time-current curve analysis for protective device coordination
– Protection relay setting calculations and verification
– Discrimination studies between upstream and downstream devices
– Arc flash hazard analysis and safety recommendations
– Compliance verification with BS 7671 and relevant IEC standards.

Earthing Design

Our comprehensive earthing system design ensures personnel safety and equipment protection. We conduct soil resistivity testing, calculate earth fault currents, and design earthing systems that comply with BS EN 50522 and ENA technical specifications. Our earthing designs include electrode layout, conductor sizing, and step and touch voltage calculations to verify safety under all fault conditions.

LV & HV Cable Design and Selection

We provide detailed cable design and selection services, considering:

– Current-carrying capacity under various installation methods and conditions
– Voltage drop calculations for steady-state and motor starting
– Short-circuit thermal withstand verification
– Economic optimization of cable size vs. losses
– Installation method specification and routing
– Cable support system design
– Termination and joint specifications
– Type testing documentation and compliance verification.

Design of Secondary 11kV Substations and Associated Switchgear

Our substation design services encompass complete 11kV secondary substation layouts, including:

– Switchgear configuration and specification
– Transformer selection and protection requirements
– Building or enclosure design coordination
– Ventilation and cooling calculations
– Fire protection system specification
– Auxiliary power supply design
– Control and monitoring system integration
– Compliance with ENA technical specifications and local DNO requirements.

Project Approach

Our design approach follows a structured methodology:

1. Briefing Document: Detailed assessment of your electrical needs, site constraints, and future expansion plans which form the scope

2. Conceptual Design: Development of routes and likely electrical loads (kVA)

3. Detailed Design: Comprehensive calculations, equipment selection, and documentation

4. Design Review: Internal verification and validation against standards and requirements

5. Client Approval: Presentation and explanation of design solutions

6. Construction Support: Technical guidance during implementation

7. Commissioning Assistance: Verification of installed systems against design intent

This systematic approach ensures your electrical infrastructure is designed 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.
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Paragon Energy Networks
We at Paragon Energy Networks are a specialist Independent Connection Provider (ICP), we compete with the incumbent Distribution Network Operators (DNO’s) to complete your LV and HV electricity connection activities.
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