Case Studies

The VisNet Hub is designed to provide visibility of voltage and current for LV distribution substations. The Hub monitors the outgoing ways of an LV board providing insight about load, faults, and electrical condition across the network. It can measure three phases, plus the neutral for up to six Low Voltage circuits, busbar voltage, and battery status.

The Vis-Net Hub utilises EA Technology’s Low Voltage Common Application Platform operating system, which allows a range of algorithms or Apps to be deployed at the distribution substation to expand the functionality of the unit beyond simple measurement. It can provide information about the state of the electrical network for operators to improve network performance.

Integrated Utility Services (IUS) carried out works at a large food manufacturing facility that provides products for supermarkets throughout the UK. Their intake substation is operated via National Grid Electricity Distribution (NGED). The HV configuration included an aged, oil filled (Brush) combined 11kV Switchboard, with 3 NGED owned panels and 3 customer owned panels.

There was also a separate, customer owned two panel Schnieder Electric CE2/CE6 switchboard, connected via a HV cable loop. Their power supply is essential and the benefit of having an Operation & Maintenance Agreement with IUS, for their private 11kV network, was demonstrated following a fault.

We have had historic problems with the old Brush switchgear with various fault repairs completed on this network. However, it was a flashover on the NGED owned 11kV metering Circuit Breaker, which caused a loss of supply and an emergency response from both IUS and NGED.

Integrated Utility Services (IUS) was engaged by Northern Powergrid (NPg) to replace an aged, oil filled Reyrolle LMI, Ring Main Unit (RMU), as well as the insulating oil within a 750kVA, 11000/433v transformer at Cruddas Centre substation. Following appropriate isolation and earthing, the Reyrolle switchgear was removed and a new Schneider Electric RN2D RMU was installed. The transformer mineral insulating oil was decanted, compliantly removed from site and replaced with midel insulating oil. This would result in a substation with a reduction in flammable properties. 

Harmony Energy is at the forefront of a greener and more sustainable future. Harmony Energy selected Tesla Energy Projects as their main contractor, who in turn procured the services of IUS for the electrical installation works. The Little Raith Battery Energy Storage System can store enough energy to power c. 450,000 homes for two hours in the aggregate.

The Breagh Gas Field is located in the North Sea. A 20” pipeline transports hydrocarbon fluids from the Breagh Alpha Platform to the Teesside Gas Processing Plant (TGPP) terminal at Seal Sands, for processing and gas export to the National Grid National Transmission System gas pipeline.

In total IUS completed five individual service connections on the west bank of Loch Ness that formed part of Scottish Water’s Regional Improvement Scheme. The scheme would provide an upgrade to resolve the water quality and resilience issues in the area.

IUS completed the electrical construction works associated with the Lochend Wind Farm development. The connection of four 2.3MW Wind Turbines to the grid required a 33kV extension to the Scottish and Southern Energy electrical network. IUS was appointed to undertake the design and installation of the 33kV contestable elements of the connection activity.

Scottish Water engaged IUS to install a new 3 phase supply to their Pumping plant at Drumboyhill and Single Phase Supply to their new Cathodic protection at Shieldhill Farm.

IUS were contracted to construct a new 1000kVA, 11000/433V UDE substation comprising a transformer with close coupled 11kV ring main unit and 1600amp ACB to provide a bulk LV supply to the site metered at LV.

IUS currently deliver an extensive portfolio of frameworks for Northern Powergrid (NPg). These encompass both overhead line (OHL) and ground mounted (GM) works. Over a considerable number of years, IUS has been consistently achieving exemplary customer satisfaction by delivering a safe, compliant and quality service. The customer satisfaction achieved is not only with the client but the millions of customers connected to the NPg network.

IUS were contracted by Hull University Teaching Hospitals NHS Trust to install the 11kV Infrastructure for a new 5MWe Solar Farm on land adjacent to Castle Hill Hospital, as part of the trusts plans to become carbon neutral by 2030.

IUS has c.1100 operation and maintenance agreements throughout the UK. There are three locations where IUS carry out this activity for EnergieKontor on their UK windfarms. This service includes inspection and switchgear maintenance. IUS also provides a call out service for emergency response.

Robertson CE Ltd has constructed a new building at the Freeman Hospital site, now named the Day Treatment Centre. IUS's scope of works included the design, procurement, and installation of two air-cooled 11000/433V transformers with close coupled 11kV ring main units within a new substation constructed for the Day Treatment Centre. 11kV cables were supplied and Installed from an existing substation within the hospital to the Day Treatment Centre substation along with LV cables from the substation to the adjacent LV switch rooms.

The scope of these works was to provide the Developer with a temporary supply as the Distribution Network Operator (DNO) was unable to provide the substation permanent connection, with new house owners ready to move in.

To enable power to be available it was agreed with the Developer and DNO that a generator and back up connection would be installed temporarily.

IUS completed the electrical construction works associated with the prestigious Gorbals Pumping Station project. The power for the three 1.2MW pumps required a 3.6MVA connection to the existing Scottish Power Energy Networks 11kV network. IUS were appointed to undertake the design and installation of the adoptable 11kV contestable elements of the connection works along with the clients own 11kV infrastructure within the Pumping Station itself.

Network Rail awarded IUS the contract for the replacement of the existing 11kV distribution substation at Leeds City Station. The existing oil filled switchgear was replaced with new apparatus. The works were coordinated to incorporate changes to the Northern Powergrid equipment.

The development of a new RWPS on the west bank of Loch Ness formed part of Scottish Waters Regional Improvement Scheme. The scheme would provide an upgrade to improve the water quality and system resilience to the area. As part of the Scottish Water’s Supply Chain, IUS delivers contestable connections as an Independent Connections Provider. Therefore, IUS was appointed to design, procure and deliver the new electrical supply to operate this new pumping station.

IUS completed the installation of two 33kV cable circuits, which form part of the Lochend windfarm connection works. This was a challenging route and IUS implemented cable ploughing technology.

NPg operates a ground mounted remote-control system across their distribution substation network. This system enables them to monitor plant on the distribution network and carry out remote switching from the system control centres.

To enhance the capability and capacity of this system, NPg required the commissioning of radio equipment at strategically identified sites on the distribution network across both the NPg Northeast plc and NPg Yorkshire plc license areas. This will minimise the impact and duration of unplanned fault related loss of supplies to reduce the number of Customer Minutes Lost (CML’s) and provide excellent customer service.

IUS was appointed by Scottish Water to procure a LV supply to support their CSO screening facility at Coalburn Road, South Lanarkshire.

The route for the new LV service ran along heavily trafficked routes, therefore both vehicular management was carefully considered as well as pedestrians. This would minimise the impact to the residents and users of the Coalburn Leisure Centre.

IUS was appointed by Scottish Water (SW) to provide a new HV supply to support the planned extension to the existing wastewater treatment works at Ardersier. Located on the outskirts of a conservation area, all works, including site traffic had to be carefully programmed and managed to minimize the impact to the area.

IUS secured a contract to deliver NPg Automation, which improves their customer service via network control remote switching capability. This reduces electrical downtime for customers should a fault occur on the network. An RTU can be utilised to carry out remote High Voltage switching to quickly restore supplies. IUS are providing installation, commissioning, and technical support services to improve network restoration times via remote switching capabilities for 11kV ground-mounted switchgear. This is achieved via a central control centre over a secure radio network.

IUS has been involved in supporting NPg automation for many years in a bid to help sustain and improve the infrastructure and network control remote switching capability which lessons power outages for customers should a fault or trip occur. As such IUS provides installation, commissioning, and technical support to NPg, which improves network restoration time and remote switching capability for 11kV ground Mounted switchgear.

IUS has a framework in place with NPg, which includes asset replacement activity. IUS has been commissioned to deliver six 11kV switchgear replacements in 2022, where aged oil insulated equipment will be replaced with new High Voltage (HV) apparatus, which will enhance the NPg network. This is the type of work IUS also deliver for customers with privately owned HV apparatus.

IUS have completed the electrical construction works associated with the Melton Wind Farm development. The connection of the two 2.3MW Wind Turbines to the grid required a 33kV extension to the Northern Powergrid (NPg) electrical network. IUS were appointed to undertake the design and installation of the 33kV contestable elements of the connection works, along with the private 33kV and LV infrastructure.

The scope of works was to design, supply and install a 15MVA, 11kV network including substations and interconnecting cables to provide the power for a new Wren Kitchens Factory constructed adjacent to the existing Wren Kitchens site in Barton-upon-Humber.

IUS completed the electrical construction works associated with Unilever’s supply upgrade at their site in Leeds. In order to provide a 4.3MVA supply, a new 11kV Distribution Network Operator (DNO) substation was required, as well as new private 11kV switchgear and transformers. IUS were appointed to undertake the design and installation of the 11kV contestable elements of the connection works along with the private 11kV and LV infrastructure.

The scope of works included the design, procurement and installation of UDE (Unit Distribution Equipment) substation consisting of Schneider Electric RN2-C HV switchgear, 800kVA transformer, complete with a close coupled 5-way LV board. The UDE, once energised, provided power to 174 new homes on the Saddlers Grange development in Howden. This substation is dual owned by Northern Powergrid (NPg) and ESP Utilities Group (ESPUG), therefore constructed to the adoptable standards of both parties.

IUS delivered this work under our as an accredited Independent Connections Provider (ICP). Therefore, the works were carried out to the adoptable standards of the Distribution Network Operator, Northern Powergrid (NPg). The scope included the design, procurement, and installation of a 20kV distribution substation, low voltage sub-mains cabling, and a replacement customer low voltage switchboard to provide an increased supply capacity to the Tosoh Quartz factory in Greencroft, County Durham. The facility produces quartz glassware for the semiconductor industry for use in the processing of integrated circuits.