Distribution Network Operator's (DNO's) and Independent DNO's

IUS are trained, authorised and competent to work directly for DNO’s and Independent DNO’s. We have a number of frameworks encompassing design services, overhead line activity, network automation, maintenance and switchgear replacements.

IUS are an experienced delivery partner in power distribution and have worked extensively for licence holders in the regulatory sector.

IUS are trained, authorised and competent to deliver works for both DNO’s and Independent DNO’s.

We can adhere to their specifications and design, supply and install electrical infrastructure to the required standards. This can be via working directly for the DNO/IDNO, generally via a framework agreement or as an Independent Connections Provider, with the network being adopted on energisation.

IUS operate throughout the UK on Low Voltage networks through to 132kV.

 

Working on utility networks provides IUS with the opportunity to demonstrate our safe systems of work, which are implemented on a daily basis.

There are millions of customers connected to extensive systems, who require a reliable energy supply. Network performance is key and IUS are a trusted delivery partner.

NPg Automation Commission - Spring Bank

NPg Automation Commission

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 ...

Client

Northern Powergrid

Project

Automation

Location

Spring Bank Road 644, Farsley, Leeds

SERVICES PROVIDED
  • Test/Commission of RTU & Actuators.
OVERVIEW

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.

DESCRIPTION

The work involves carrying out a detailed survey of a substation to ascertain if the site is suitable for automation. The survey considers the switchgear installed, network design required by NPg and signal strength tests for connectivity to a secure communication network. The survey would identify the automation equipment to be installed by approved remote terminal unit (RTU) installers, and later actuators to be commissioned by an IUS senior authorised person (SAP).

Site installation of the RTU was carried out following a successful site survey to identify where the unit would be wall-mounted and umbilical cables run between RTU and the switchgear already pre-installed. The design incorporates fault path indicators to be automated and wired into the RTU that indicate back to control if a fault occurs.

Commissioning of the site was carried out by an authorised SAP. Final connections were made onsite and local operational tests were carried out. Once satisfied that the installation was operationally ready the SAP would contact the control desk engineer and carry out any network reconfigurations required under a system outage to allow remote operation. Remote testing is accomplished by the control desk engineer and the Automation equipment made operational on the NPg network.

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NPg Automation Installation

NPg Automation Installation

IUS secured a contract to deliver NPg Automation, which improves their customer service via network control remote switching capability ...

Client

Northern Powergrid (NPg)

Project

Urban Automation

Location

Hull

SERVICES PROVIDED
  • Civil excavation works
  • Remote Terminal Unit (RTU) installation
  • Testing and commissioning including with NPg control centre
OVERVIEW

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.

DESCRIPTION

The work involved carrying out a survey at the substation location to ascertain if the site is suitable for automation. The survey considered the existing 11kV switchgear installed on site; network design required by NPg and signal strength tests for connectivity onto the secure communication network. The survey identifies the automation equipment to be installed and if any civils work is required.

Civil works were completed on this site, which allowed cable connections to be installed to the existing switchgear and new RTU telecontrol equipment. The new RTU was installed on a frame with umbilical cables, connecting the new actuators, which are fitted to the 11kV switches. The design incorporates fault path indicators, which are automated and wired into the RTU. These indicate back to control if a fault occurs. A power supply for the RTU is connected to the Low Voltage feeder pillar within the substation compound, which is monitored by the RTU and control centre.

Commissioning of the site is carried out by the IUS Senior Authorised Person (SAP). Final connections were made on site, with all local operational tests carried out. Once satisfied that the installation was operationally ready the SAP contacted the control desk engineer and carried out any network reconfigurations required under a system outage, to allow remote operation. Remote testing was accomplished by the control desk engineer and the automation equipment was transferred into operational use on the NPg network.

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Draper Yard - ASE II Temple Properties, Leeds

Temple Properties

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 ...

Client

ASE II Temple Properties

Project

Substation, Transformer and Ring Main Unit

Location

Marshall Street, Leeds

SERVICES PROVIDED
  • Design of a new bulk LV supply
  • Liaison with DNO and IDNO for design approval, construction and build acceptance
  • Liaison with main on-site M&E contractors
  • Project management and site coordination
  • Authorised and competent electrical fitters and cable jointers
  • Senior Authorised Personnel and technical services
  • Liaison with Leeds City Council for opening notices for civil element
  • Provision of as-built records and O&M information
OVERVIEW

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.

DESCRIPTION

IUS undertook the design, procurement, installation, and commissioning of the Northern Powergrid (NPg) contestable works, which comprised the 11kV Ring Main Unit and the associated 2 No. 11kV, 300mm triplex cables. These cables were installed on private and public land to the NPg point of connection. This element also included the design and installation of the earth nest for the whole substation to NPg specifications.

IUS also undertook the design, procurement, installation, and commissioning of the IDNO (ESP) element of the project which comprised the transformer with close coupled ACB. IUS also advised the client with regard to the overall construction of the substation and the standards required by both the DNO and the IDNO in order for the adoption by both parties to be achieved.

The substation was tested, commissioned, and energised with the appropriate apparatus adopted by NPg and ESP.

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Secondary Scada Commission

Secondary Scada Commission

NPg operates a ground mounted remote-control system across their distribution substation network. This system enables them to monitor plant on ...

Client

Northern Powergrid

Project

Secondary SCADA

Location

Castleford Batch Two

SERVICES PROVIDED
  • Test and commission of RTU radios
OVERVIEW

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 requires 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 therefore support the vision of providing an excellent Customer Service.

DESCRIPTION

The scope of work is to update existing equipment and software for remote-control systems aligned with the NPg Secondary SCADA project for 2022. The work is on the 11kV and 20kV ground mounted networks in both licenced areas and is a mixture of indoor and outdoor substation locations.

Work will include:

  • Management of radio commissions when at the site.
  • Provision of suitably skilled and authorised staff for all HV switching and commissioning-related operational activities.
  • Organisation of the HV outage requests on the NPg network in the northeast. This may include IUS switching out HV circuits and issuing safety documentation where applicable.
  • In Yorkshire, liaison with the NPg Telecommunications team to facilitate testing and change of the substation site radios and commissioning confirmation.
  • Arrange all necessary access permissions, highlighting any substation issues where sites are inaccessible or have vegetation issues, which should be reported as part of basic housekeeping through the 159-reporting process (NPg Amp 2 View application).

Critical to the successful delivery of these works is the effective liaison with NPg’s Secondary SCADA Project team, Telecommunications, Technical Service teams, and appointed third-party companies and EMR Integrated Services. IUS worked collaboratively on-site with the NPg-appointed contractors to facilitate the collective delivery of this work.

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DNO Frameworks Northern Powergrid Areas

DNO Frameworks Northern Powergrid

IUS currently deliver an extensive portfolio of frameworks for Northern Powergrid (NPg). These ...

Client

Northern Powergrid

Project

Multiple Frameworks

Location

North East and Yorkshire

SERVICES PROVIDED
  • Overhead line construction
  • LV overhead line shrouding
  • Overhead line inspections and remedials
  • Overhead line maintenance
  • Substation automation
  • Ground mounted HV maintenance
OVERVIEW

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.

DESCRIPTION

IUS deliver extensive low voltage (LV) OHL rebuild and refurbishment works, replacing NPg’s open wire network with Aerial Bundled Conductor (ABC) and changing rotten and defective poles where required. IUS also delivers LV OHL shrouding works for NPg, where protective shrouding is placed over exposed LV conductors to allow customers to have building and construction works completed in close proximity to the LV network. IUS exclusively deliver these works for NPg, managing the end-to-end process to strict customer service and guaranteed standard guidelines. In addition to these two core overhead line frameworks, IUS also deliver OHL inspection and remedial works for NPg, ensuring that their high-risk sites meet the necessary ESQCR standards required. IUS also deliver OHL earth tests and earth mat replacement works.

IUS is the sole deliverer of GM Automation works. On this framework, IUS instals actuators and Remote Telecontrol Units (RTU’s) in to existing NPg secondary substations. Once commissioned, these sites become automated, meaning that NPg’s Network Control Center can operate their switchgear remotely, improving restoration and response times for their customers in the event of network faults or damages. In addition, IUS also delivers GM HV substation maintenance and Fault Path Indicator (FPI) replacement works for NPg. Delivering this service, ensures that their HV network is kept up to standard and will operate as necessary when worked-upon or in the event of a fault or damage.

To deliver the above frameworks, IUS has an extensive direct team of Project Managers, Project Coordinators, Planners, Supervisors, SAP’s, AP’s, Fitters, Linesmen and Jointers. All of these staff are fully authorised to work and operate on NPg’s LV and HV overhead and underground electrical networks. They are all centrally managed, which assists with a consistent approach including efficient programming.

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