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HV Switchgear Across the UK
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// HV Switchgear in London and Across the UK

At Earl Power Engineering Ltd, we install, maintain, and support HV switchgear systems for a wide range of commercial and industrial applications. Our experienced engineers deliver every project safely, efficiently, and in full compliance with current industry standards. From turnkey substation installation projects through to replacement switchgear upgrades, inspections and fault diagnosis, we help maximise the lifespan of electrical infrastructure across London and the wider UK.

To view our previous projects or learn more about our related services, including HV transformers, please visit our gallery page. Our team works closely with clients to minimise operational disruption while maintaining the highest levels of performance and compliance.

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// Comprehensive Services and Support

We understand the critical role HV switchgear plays in protecting equipment, managing electrical loads, and maintaining a continuous power supply. That’s why we provide a complete range of installation, maintenance, operational support, and advanced testing services. Whether supporting planned upgrades or responding to urgent faults, our tailored approach improves system performance and minimises costly downtime.

Installation and Maintenance

Our installation and maintenance services cover every stage of your HV switchgear lifecycle, ensuring safe and reliable operation at all times.

  • Off-Loading, Lifting, Assembly and Positioning

  • HV Switching Operations (SAP / Authorised Person)

  • Planned Preventative Maintenance (PPM) and Upgrades

  • Fault Finding and Repairs

  • Turnkey Substation Installation (33kv/11kv)

  • Installation of Replacement Switchgear and RMUs

  • Data Centre HV Infrastructure Build-Outs

Testing and Diagnostics

To support long-term reliability and early fault detection, we deliver a full range of HV testing, diagnostic, and condition monitoring services using industry-leading technology.

  • Thermal Imaging (FLIR)

  • Partial Discharge (EA Technology UltraTEV)

  • Insulation Resistance Testing

  • AC Flash Testing

  • Ducter (Micro-Ohm) Testing

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// Equipment and Manufacturer Expertise

We work across a wide range of HV switchgear systems, supporting both new installations and existing infrastructure in London and the wider UK. Our engineers have extensive experience with different equipment types, voltage levels, and network configurations, ensuring seamless integration and maintenance. We’re also highly familiar with leading manufacturers and models, enabling us to provide reliable, manufacturer-aligned solutions across diverse projects.

Equipment and Systems

Manufacturers and Models

Call our experts on 01883 347888 for HV switchgear installation and maintenance across the UK.