Engineered Systems (Electrical) Ltd

Engineered Systems (Electrical) Ltd


Engineered Systems (Electrical) Ltd provides quality assured electrical engineering and contracting services to customers across the UK. Established in 1992, we specialise in full turnkey solutions for electrical infrastructure up to 132,000 Volts, offering cost effective packages, custom-designed by experienced electrical engineers to meet each customer individual requirements.

Since its inception, ESE Ltd has become a renowned high voltage power engineering contractor and has worked on thousands of projects, throughout the UK. From our central UK location in Leeds, we are able to work anywhere in the UK. A multidiscipline in-house team of engineers enables us to be cost effective and responsive, ensuring continual supply of equipment and turnkey solutions of the highest quality.

No matter the market sector, ESE Ltd can deliver the most efficient solution to meet your business’s requirements up to 132,000 Volts. Whether you are looking for just a trustworthy supply to power lifesaving equipment or looking to upgrade your current network ESE Ltd have a developed an industry leading expertise in these fields and more. We offer cost effective packages, to help reduce your operating costs by incorporating our New Tier 1 or Tier 2 transformer as well as our industry leading amorphous transformer. We have extensive experience working in all the major market sectors and can project manage the entire project from start to finish.

As part of ESE Ltd’s commitment to upholding our position as one of the leading high voltage power engineering contractors, we provide the highest standards of health, safety, quality and environmental management. We operate a Quality Management System certified to ISO 9001, an Environmental Management System certified to ISO14001. Our Health and Safety Management system is also exceeding the OHSAS 18001 principles. With our management systems are subject to regular internal & external audits. We are accredited by the NICEIC and as an Independent Connection Provider by the NERS scheme. We are also Constructionline members and Achilles UVDB approved.

NERS Accredited Independent Connection Provider

As part of our full turnkey package ESE Ltd are accredited Independent Connection Provider (ICP) under the NERS Scheme, which is administered by Lloyd’s Register on behalf of the UK’s Distribution Network Operators. This means that we have been assessed and accredited nationally to carry out Contestable Works associated with new connections to the electricity distribution system. We can carry out the whole process with our own multidiscipline engineers;

As an accredited ICP, we can liaise with the relevant host DNO to undertake all aspects of the grid connection:

  • Apply to the DNO for a Point of Connection (POC) to their existing distribution system
  • Detailed design of the connection from the POC to the customer’s site, including route selection (subject to review and approval by the DNO).
  • Procurement of cables, switchgear and transformers required to make the connection (in accordance with DNO equipment and material specifications)
  • Obtaining all the necessary Way leaves and Deeds of Grant (to DNO specification)
  • Relevant planning permission and other approvals
  • Excavation of the connection route and cable installation from the POC to the customer’s site, or the installation of any overhead lines from the POC to the customer’s site
  • Construction and installation of the required electricity substations (to DNO specification)
  • Commissioning of the installed connection assets (witnessed by the DNO)
  • Provision of all as built information and commissioning records for the connection assets constructed.
  • Liaising with the DNO on final connection of the customer’s site to the electricity distribution network.

Full turnkey electrical solutions

At ESE Ltd we use our skills and experience to deliver projects that are professionally engineered, and project managed, incorporating all key phases from design, installation, testing and commissioning. Our highly capable teams serve clients across the UK, priding ourselves on the quality of our work. The power solutions we provide are custom engineered, by experienced staff, in line with each customer’s individual requirement. With more than 25 years’ experience, we can suggest innovative, yet practical, cost-effective solutions that not only come in on time and budget but that are designed to minimise disruption and support the revenue-earning goals of our customers.

Key Project Capabilities


Using the latest software, we are able produce all drawings needed and our experienced design team will adopt responsibility for the entire design process to ensuring that every specific detail is taken into account. We have full electrical design capabilities and can conduct studies on both private networks. These include grid compliance, HV & LV cable sizing, fault studies, load flow, power quality (P28), harmonics (G5/4) and reactive power studies. This suite of studies is generally required by the DNOs to connect onto their network.


We have an in-house team of qualified project managers who will ensure the project is completed on time and within budget. Our project managers using the latest software undertake all project programming, stakeholder engagement and liaison with all parties involved within the project. In addition, ESE can carry out protection grading studies and programme relays. Where we are conducting an installation at an industrial site, we can provide advice on energy efficiency, such as the cost saving benefits that could be achieved by installing Power Factor Correction equipment.


Our team of qualified technicians includes electricians, and jointers who carry out all aspects of electrical installations across the UK. The ability to offer a wide range of services in-house ensures that our clients are not only receiving best value for money but are also are benefitting from direct project management. We are able to offer full substation installation including high voltage switchgear, transformers, cabling, earthing and Low Voltage distribution units. The installation team supervises the delivery, offloading and positioning of all equipment and will install all the necessary cabling and carry out cable jointing and terminations.

Our experienced commissioners have an excellent know of all leading manufacturers equipment. Carrying out testing in our Leeds workshop before on site commissioning of the electrical installation. Test Certificates and relevant O&M documentation is supplied on completion of each install.


Our designated maintenance team carries out maintenance at more than 250 customer sites, providing aftercare maintenance for new installations and existing sites. This is usually provided with five-year contracts, taking care of MV Equipment, performing annual maintenance and inspections, and acting as Authorised Persons for site. As a member of Energy Networks Association, we receive immediate notification when a Suspension of Operational Practice (SOP) or Dangerous Incident Notification (DIN) is served on a piece of electrical equipment by other members, including DNOs and the Health and Safety Executive. Equipment is maintained and serviced as per the manufacturer’s recommendations, including inspections, testing and commissioning of equipment. We also have a fault-finding department that operates on a 24-hour call out basis and utilises sophisticated testing instruments to identify cable faults within a precise area. We suggest recommendations for potential upgrades, enabling customers to improve the reliability and sustainability of their network.



ESE Ltd design and stocks a wide range of new and full re-engineered transformers including EU Directive compliant, Ground Mounted liquid filled and Cast Resin units, as well as Pole Mounted Transformers. These range from 50kVA to 100 MVA, primary voltage up 132,000V and secondary voltage to suit our customers’ requirements. We are also able to supply and install Tier 2 transformers that exceed the requirements for the EU Directive for 2021. They are manufactured to the specification of internationally recognized standards (BS, IEC and ANSI) and comply with the EU Eco Design Directive for transformers. We also carry a large range of fully refurbished distribution transformers, which come with a 24-month standard warranty. If required switchgear can be directly coupled onto our transformers to form a complete package substation.


As a specialist contractor, ESE Ltd work directly with switchgear manufacturers and supply, install, test and commission switchgear on their behalf. We can supply different types of switchgear, according to customers’ requirements, including SF6, Vacuum & Air, supplied either as standalone units or as complete switchboards. We also supply bespoke switchgear framework to suit all site conditions. We also carry out full grading studies of the existing system to ensure that the switchgear that is supplied is compatible. We stock a large selection of Re-furbished switchgear, including SF6, Vacuum & Air types, which can be supplied and tested with 12 months warranty.

LV Distribution Units

ESE Ltd are the only U.K. supplier to offer extensible low voltage distribution units to futureproof your distribution network. This Low Voltage distribution units now enables you to extend the number of LV breakers to increase your LV power. Housed in our lockable, weatherproof enclosures these can be sited safely outdoors. The units can be either free standing using a rear connected LV cable box, or they can be close coupled to your transformer via a specially designed throat arrangement.

We are also able to include a changeover panel, which again is housed in our standard lockable weatherproof enclosure. This now gives you the security of a generator connection point without having to alter your LV switchboard. Your existing LV cable tails from your transformer to your LV switchboard will now be protected by a new ACB mounted in the changeover panel. Ether permanent or temporary generator can now be connected to the remaining ACB. Litton Veam type connectors can also be supplied on the side of the ACB to facilitate the connection of temporary generator cables. All our Low Voltage Distribution units are manufactured in the UK and custom designed to meet our clients specifications.

0113 2721222

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