Contact

Construction

Electrical, control and instrumentation, HV cabling, earthing, battery storage, solar and fibre for process plant, power generation, grid connections and industrial sites. Installed to the drawings and the specification, tested to the ITP and handed over with a complete record.

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What we do

EC&I installation, testing and commissioning

Substations, switchgear, transformers, MCCs and distribution. Power and control cabling, containment, glanding, terminations and testing. Field instruments, impulse tubing, junction boxes, control panels, loop checks and function testing. Industrial and commercial electrical installation.

BS 7671 · BS EN IEC 61439 · BS 7909

Hazardous area installation

Ex equipment installed and inspected in hazardous areas by CompEx-certified personnel, with full documentation. Larger campaigns are delivered with our network of CompEx-certified specialists.

BS EN IEC 60079-14 · BS EN IEC 60079-17

EV and fleet charging

Workplace, fleet depot and rapid charging infrastructure, with civils and groundworks by our partners under one contract.

BS EN IEC 61851-1 · BS 7671 Section 722

Testing, inspection and maintenance

Inspection and testing of electrical installations, thermographic surveys, and planned and reactive maintenance.

BS 7671 · IET Guidance Note 3

HV cable jointing and fault location

HV cable jointing up to 33 kV, HV fault location on networks up to 66 kV, and live LV mains and service jointing, carried out in-house by ticketed personnel.

  • HV jointing and terminations to 33 kV
  • HV fault location on networks up to 66 kV
  • Live LV mains and service jointing
  • Testing before the circuit goes into service

BS 7870 · IEC 60502

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Earthing and lightning protection

Earth grids, electrodes and bonding for substations, battery storage, solar, rail and grid connections. LV, plant and instrument earthing, lightning protection and surge protection.

  • Our civils partner carries out the groundworks, so the package runs under one contract and one programme
  • Soil resistivity and earth resistance testing
  • Test certificates and as-built drawings
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Earthing standards and specifications

  • BS 7430Code of practice for protective earthing of electrical installations
  • BS 7671Requirements for Electrical Installations (IET Wiring Regulations)
  • BS EN 50122-1Railway applications – Fixed installations – Electrical safety, earthing and the return circuit – Part 1: Protective provisions against electric shock
  • BS EN 50122-2Railway applications – Fixed installations – Electrical safety, earthing and the return circuit – Part 2: Provisions against the effects of stray currents caused by d.c. traction systems
  • BS EN 50122-3Railway applications – Fixed installations – Electrical safety, earthing and the return circuit – Part 3: Mutual interaction of a.c. and d.c. traction systems
  • BS EN 50522Earthing of power installations exceeding 1 kV a.c.
  • DNO specificationsDNO specific engineering specifications
  • ENA TS 41-24Guidelines for the design, installation, testing and maintenance of main earthing systems in substations
  • EREC S34A guide for assessing the rise of earth potential at electrical installations
  • EREC S36-1Identification and recording of ‘hot sites’ – Joint Electricity Industry / British Telecom procedure
  • NG TGN(E)187Guidance for conductor jointing in substations
  • NG TS 3.01.02Technical specification – Earthing

Full standards register →

Battery storage and solar

Grid-scale and industrial battery storage, and rooftop and ground-mounted solar PV, installed, tested and documented for connection.

  • HV connection and jointing to 33 kV, ring main units, switchgear and transformer connections
  • DC cabling between battery enclosures, PCS and transformers
  • Auxiliaries, fire detection interfaces and SCADA
  • Solar PV for industrial, commercial and domestic sites
  • Testing, commissioning and handover

IEC 62933-5-2 · BS EN 62446-1 · BS 7671 Section 712 · ENA EREC G98 / G99

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Modular installations

EC&I fit-out and commissioning of modular switchrooms, local equipment rooms, remote instrument buildings and packaged substations, each handed over with a complete quality dossier.

BS EN IEC 61439

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Fibre optic networks

Fibre optic splicing, termination and OTDR testing for control system, SCADA and OT networks, as part of an EC&I package or on its own.

  • Fusion splicing and termination
  • OTDR and insertion loss testing
  • Test results and records for each fibre

IEC 61280 · IEC 60793 · IEC 60794

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Cable diversion works

Existing LV and HV cables diverted to clear the way for new works, with the groundworks by our civils partner under one contract.

  • Cables identified and spiked before they are cut
  • HV jointing to 33 kV and LV jointing by our own ticketed jointers
  • Testing before the circuit goes back into service
  • As-built records of the new cable route

BS 7870 · IEC 60502

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How we deliver

Our own team

Installation is carried out by HLF’s own team, supervised by HLF.

Redlines and as-builts

Changes from the issued design are redlined at the workface, revision-controlled and held in Navus or your document system (Aconex, Asite, ProjectWise).

One point of contact

Civils, groundworks and design partners are coordinated by HLF under one contract.

Other services

ConsultancyIndependent project reviews, health, safety and CDM, and design management for clients, EPC contractors and asset owners.ManagementConstruction, project and contract management, NEC Supervisor services and completions, across all disciplines.AssuranceOwner’s engineer services, QA/QC, inspection and hazardous area compliance for operators, asset owners and contractors.

Contact

Tell us about the scope, the contract and the programme. We reply to enquiries within one working day.

Phone+44 (0) 7885 241054Emailinfo@hlf-group.com
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