eds 08-0148 appendices to ena er g81 - uk power...

Document Number: EDS 08-0148

Version: 3.2

Date: 04/12/2015

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ENGINEERING DESIGN STANDARD

EDS 08-0148

APPENDICES TO ENA ER G81

Network(s): EPN, LPN, SPN

Summary:

This standard provides technical information for Independent Connection Providers (ICP) and Independent Distribution Network Operators (IDNO) involved in network extensions downstream of a declared point of connection under Competition-in-Connections. Contestable work is governed by ENA Engineering Recommendation G81 which provides a technical framework for the design and installation of a network extension.

Author: Stephen Cuddihey Date: 04/12/2015

Approver: Steve Mockford Date: 09/12/2015

This document forms part of the Company’s Integrated Business System and its requirements are mandatory throughout UK Power Networks. Departure from these requirements may only be taken with the written approval of the Director of Asset Management. If you have any queries about this document please contact the author or owner of the current issue.

Applicable To

UK Power Networks External

☒ Asset Management ☒ G81 Website

☐ Capital Programme ☒ UK Power Networks Services

☒ Connections ☐ Contractors

☐ Health & Safety ☒ ICPs/IDNOs

☐ Legal ☐ Meter Operators

☒ Network Operations

☐ Procurement

☐ Strategy & Regulation

☐ Technical Training

Appendices to ENA ER G81 Document Number: EDS 08-0148

Version: 3.2

Date: 04/12/2015

© UK Power Networks 2017 All rights reserved 2 of 21

Revision Record

Version 3.2 Review Date 18/03/2019

Date 10/04/2017 Author Lee Strachan

Why has the document been updated: Minor version update.

What has changed: reference to EAS 00-0007 changed to EAS 07-0000, and EAS 00-0002 to EAS 02-0000.



Why has the document been updated: Minor version update.

What has changed: reference to EAS 00-0001 changed to EAS 01-0000.


Date 04/12/2015 Author Stephen Cuddihey

Why has the document been updated: Renumbering of referenced documents.

What has changed:

HV insulation testing document reference updated (Sections 4.4, 5 and 6.1).

Unmetered services document added (Sections 5 and 6.1).


Date 18/03/2015

Author Chloe Brown/ Stephen Cuddihey

Why has the document been updated: Periodic review.

What has changed:

Structure revised to improve usability.

Document lists updated to reference latest documents.

Document title amended.



Document reviewed for publishing on G81 website


Date 21/03/2012 Author Pete Lawson

Original unapproved draft


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Contents

1 Introduction ............................................................................................................. 5

2 Scope ....................................................................................................................... 6

3 Glossary and Abbreviations ................................................................................... 6

4 Documentation ........................................................................................................ 7

4.1 Planning and Design ................................................................................................. 7

4.1.1 General ..................................................................................................................... 7

4.1.2 Network and Customer Supply Design ...................................................................... 8

4.1.3 Substation Design ..................................................................................................... 9

4.1.4 Earthing Design ......................................................................................................... 9

4.2 Materials .................................................................................................................... 9

4.3 Installation ............................................................................................................... 10

4.4 Testing and Commissioning .................................................................................... 10

4.5 Records ................................................................................................................... 10

5 Document Index by Topic ..................................................................................... 11

6 References ............................................................................................................. 16

6.1 UK Power Networks Standards ............................................................................... 16

6.2 National and International Standards ....................................................................... 17

Appendix A – Design Information to be provided by ICPs ............................................. 18

A.1 General Information ................................................................................................. 18

A.2 Power Information ................................................................................................... 18

A.3 Maximum Earth Loop Resistance (for sites to be adopted by UK Power Networks). 20

A.4 Earthing, Fuse selection and Prospective Short Circuit Current (for sites to be adopted by UK Power Networks) .......................................................................................... 20

A.5 Substations ............................................................................................................. 20

A.6 Cable Layout and Information .................................................................................. 21

A.7 Quality of Supply Implications of the Network Extension ......................................... 21

A.8 Legal Agreements ................................................................................................... 21

A.9 Unmetered Supplies (for sites to be adopted by UK Power Networks) .................... 21


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Tables

Table 4-1 – Planning Standards ............................................................................................ 7

Table 4-2 – Network and Customer Supply Design Standards .............................................. 8

Table 4-3 – Substation Design Standards ............................................................................. 9

Table 4-4 – Earthing Design Standards ................................................................................ 9

Table 4-5 – Approved Materials and Equipment Standards................................................... 9

Table 4-6 – Installation Standards ....................................................................................... 10

Table 4-7 – Testing and Commissioning Documents .......................................................... 10

Table 4-8 – Records ........................................................................................................... 10

Table 5-1 – Index of topics and the document in which they described in ........................... 11

Table A-1 –Typical Customer Loads ................................................................................... 19

Table A-2 –Typical Customer Distribution Transformer Data ............................................... 19

Table 6-3 –Typical LV Feeder Usage .................................................................................. 20


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1 Introduction

This standard provides technical information for Customers, Independent Connection Providers (ICP) and Independent Distribution Network Operators (IDNO) involved in network extensions downstream of a declared point of connection under Competition-in-Connections.

Contestable work is governed by ENA Engineering Recommendation G81 which provides a technical framework for the design and installation of a network extension and consists of the following parts:

Design and Planning (parts 1 and 4).

Materials Specification (parts 2 and 5).

Installation and Recording (parts 3 and 6).

Contestable diversionary and reinforcement of underground and overhead works (part 7).

If an Independent Connection Provider (ICP) wishes to undertake the design and installation of a network extension the following requirements shall be complied with:

Agree the principles of all designs with UK Power Networks during the design process and comply with the design and planning standards shown in this document.

Submission of the proposed design to UK Power Networks for approval should contain the information detailed in Appendix A.

The procurement and provision of equipment and materials to UK Power Networks current specification.

Trenching and other preparation of the site, including the circuit routes between the development and the POC.

Construction of the contestable work.

Recording work done and recording the location of cable routes and other equipment on site or elsewhere (where those assets are installed by the ICP), and the provision of this information to UK Power Networks.

Reinstatement (both temporary, and if appropriate, and permanent)

Making provision for the installation of metering equipment where necessary.

Reinforcement and diversionary works associated with a connection (subject to limitations and exclusions).

Where UK Power Networks requirements are not specified in this document, ICPs should plan to undertake any design work in accordance with best industry practice, complying with all appropriate legislation, including those referred to in the ENA ER G81 suite of documents. If an ICP chooses to use a design specification that is not included within this document, the ICP should liaise with UK Power Networks for confirmation that the proposals are in keeping with UK Power Networks design methodology.

ICPs are also required to enter into an adoption agreement with, and obtain design approval from UK Power Networks prior to the commencement of construction for the adoption of all plant and equipment. Civil asset adoption requirements will be determined for each design.

If you need further information about the design process please contact UK Power Networks competition in connections department at [email protected].

mailto:[email protected]


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2 Scope

This standard applies to ICPs and IDNOs involved contestable network extensions on UK Power Networks EPN, LPN or SPN distribution networks under Competition-in-Connections.

3 Glossary and Abbreviations

Term Definition

DNO Distribution Network Operator

ENA Energy Networks Association

ICP Independent Connection Provider

IDNO Independent Distribution Network Operator

UK Power Networks UK Power Networks (Operations) Ltd consists of three electricity distribution networks:

Eastern Power Networks plc (EPN).

London Power Network plc (LPN).

South Eastern Power Networks plc (SPN).


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4 Documentation

This section provides an overview of the main standards covering planning, design, materials, installation, commissioning and records in accordance with ENA ER G81. A complete set of standards and drawings are available from the UK Power Networks G81 website.

http://library.ukpowernetworks.co.uk/library/en/g81/

4.1 Planning and Design

4.1.1 General

Table 4-1 – Planning Standards

Document Number

Document Title Summary

EDS 08-0113 Guidance for the Application of ENA ER G88 and G81 Inset Networks (IDNOs and other licenced DNOs)

This standard has been published to provide information and guidance on the application of ENA ER G88 which is a guidance document for the planning, connection and operation of electricity networks at the interface between DNOs and IDNOs (i.e. licensed DNOs)

EDS 08-0119 Guidance for the Application of ENA ER P2/6 Security of Supply

This standard provides guidance on the application of Engineering Recommendation P2/6 published by the Electricity Networks Association (ENA); P2/6 is a guidance document on system planning and network capacity requirements and details the minimum standards for the security of supply. The concepts and requirements relating to the security contribution of distributed generation and demand side response (DSR) are also included

EDS 08-0132 Planning Guidance for Disturbing Loads

This standard details the approach that should be taken when assessing a connection request or feasibility study for loads which may cause disturbance to the supply waveform. This may take the form of flicker, unbalance, or harmonic voltage distortion. This standard applies to all voltage levels

EDS 08-0142 Planning Requirements for Secondary Distribution Substations

This standard outlines the requirements for the planning of secondary distribution substations and customer substations metered at HV or LV, including selection and agreement of locations for substation sites

http://library.ukpowernetworks.co.uk/library/en/g81/


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4.1.2 Network and Customer Supply Design

Table 4-2 – Network and Customer Supply Design Standards

Document Number


EDS 08-0109 11/6.6kV Secondary Distribution Network Design

This standard details the guidelines for the design and development of the 11kV and 6.6kV secondary distribution networks to ensure they are safe, efficient and have regard for the environment

EDS 08-0118 Multi-Occupied Building Supplies

This standard has been published to provide information and guidance on the application of ENA ER G87 which is a guidance document for the provision of LV supplies to multi-occupied buildings

EDS 08-0129 LV Customer Supplies up to 100A Single Phase

This standard provides guidance on the provision of single-phase low voltage supplies up to 100A including modifications to looped services.

EDS 08-0136 LV Network Design This standard defines UK Power Networks policy with regard to all aspects of the design of networks that operate at low voltage

EDS 08-0141 HV Customer Supplies This standard provides guidelines for new HV supplies at 11kV or 6.6kV and existing supplies where an increase in supply capacity requires equipment to be replaced

EDS 08-0143 LV Customer Supplies Above 100A

This standard provides guidance on the provision of large three-phase LV supplies between 100A and 1600A (69kVA to 1MVA)

EDS 08-0145 EHV Design This standard provides guidance on the design and operation of the 33kV, 66kV and 132kV networks

EDS 08-0150 London 33kV Distribution Network Design and Customer Supplies

This standard provides guidelines for the development of the 33kV distribution network in and around the City of London and the provision of the associated customer supplies


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4.1.3 Substation Design

Table 4-3 – Substation Design Standards

Document Number


EDS 07-0020 Civil Requirements for New Customer Supplies and Generation Connections

This Standard provides guidance on the Civil and Building services requirements for substations and switchrooms constructed by customers and developers to accommodate equipment to be installed or adopted by UK Power Networks.

EDS 07-0105 Grid and Primary Substation Civil Design Standards

This standard details the current civil designs common to LPN, EPN and SPN for all grid and primary substations. It supersedes all network specific civil designs for grid and primary substations

4.1.4 Earthing Design

Table 4-4 – Earthing Design Standards

Document Number


EDS 06-0013 Grid and Primary Substation Earthing Design

This standard details the earthing design requirements for grid and primary substations and 132kV and 33kV connections

EDS 06-0014 Secondary Substation Earthing Design

This engineering design standard details the earthing design requirements for secondary distribution substations

EDS 06-0016 LV Network Earthing Design This engineering design standard details the design and requirements for earthing of low voltage (LV) networks

EDS 06-0017 Customer LV Installation Earthing Design

This standard provides guidance on the earthing of customer LV and HV installations

4.2 Materials

Table 4-5 – Approved Materials and Equipment Standards

Document Number

Document Title

EAS 01-0000 Overhead Lines

EAS 02-0000 Cables and Joints

EAS 03-0000 MV Switchgear

EAS 00-0004 Distribution Transformers

EAS 00-0005 Protection and Control

EAS 07-0000 Substation Civils

EAS 00-0008 LV Plant and Equipment

EAS 00-0009 Metering Equipment


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4.3 Installation

Table 4-6 – Installation Standards

Document Number


ECS 02-0019 Installation of Underground Cables LV to 132kV

This standard details the minimum requirements acceptable for the installation of new LV, 11kV, 20kV, 33kV, 66kV and 132kV cables, plus associated pilot and telephone cables

ECS 06-0022 Grid and Primary Substation Earthing Construction

This standard details the earthing construction requirements for grid and primary substations including 132kV and 33kV connections

ECS 06-0023 Secondary Distribution Network Earthing Construction

This standard provides guidance for field staff on the application of earthing to the secondary distribution HV and LV underground cable and overhead line networks

4.4 Testing and Commissioning

Table 4-7 – Testing and Commissioning Documents

Document Number


ECP 11-0001 Grid and Primary Commissioning Requirements

This standard details the commissioning requirements for all protection, control and plant at grid and primary substations. The requirements apply to all UK Power Networks staff and contractors involved in commissioning

ECP 11-0002 Secondary Commissioning Requirements

This standard details the commissioning requirements for secondary substations, plant and equipment. These requirements apply to all UK Power Networks staff and contractors involved in commissioning

ECP 11-0006 HV Insulation Testing This standard details the policy for the on-site insulation testing of new and existing high voltage cables, switchgear and transformers.

4.5 Records

Table 4-8 – Records

Document Number


EDS 12-0202a-k Asset Registration Forms

EOS 09-0100 Site Recording of Cables Plant and Equipment

This standard details the information that is to be recorded on site, the format and timing for presenting it to UK Power Networks Network Records, and the importance of recording accurate network connectivity information in order to fulfil UK Power Networks reporting obligations


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5 Document Index by Topic

This section provides a list of topics covered by the documents in Section 4.

Table 5-1 – Index of topics and the document in which they described in

Topic Document Number

Document Title

132kV network considerations EDS 08-0145 EHV Design

Asset registration EDS 12-0202a-k Forms for various types of asset

Auxiliary multi-core and multi-pair cables


BNO requirements EDS 08-0118 Multi-Occupied Building Supplies

Cables ECS 02-0019 Installation of Underground Cables LV to 132kV

Cable installation depths ECS 02-0019 Installation of Underground Cables LV to 132kV

Chargeable and non-chargeable work


Civil construction and materials EDS 07-0102 Secondary Substation Civil Design

Civil designing and planning EDS 07-0020 Civil Requirements for New Customer Supplies and Generation Connections

EDS 07-0102 Secondary Substation Civil Design


Class of supply EDS 08-0119 Guidance for the Application of ENA ER P2/6 Security of Supply

Commissioning ECP 11-0001 Grid and Primary Commissioning Requirements


Customer supplies EDS 08-0129 LV Customer Supplies up to 100A Single Phase

EDS 08-0141 HV Customer Supplies


EDS 08-0145 EHV Network Design


Direct buried cable installations ECS 02-0019 Installation of Underground Cables LV to 132kV

Domestic metering EDS 08-0129 LV Customer Supplies up to 100A Single Phase

Earthing construction ECS 06-0022 Grid and Primary Substation Earthing Construction


Earthing design EDS 06-0013 Grid and Primary Substation Earthing Design


EDS 06-0016 LV Network Earthing Design


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Document Title

EDS 06-0017 Customer Installation Earthing Design

Earth fault loop impedance EDS 08-0136 LV Network Design

Earth resistance values EDS 06-0014 Secondary Substation Earthing Design


EHV cable and OHL recording EOS 09-0100 Site Recording of Cables Plant and Equipment

EHV design considerations EDS 08-0145 EHV Design

EHV metering EDS 08-0145 EHV Design

EHV ownership boundary EDS 08-0145 EHV Design

Firefighting supply arrangements


Flicker assessment EDS 08-0132 Planning Guidance for Disturbing Loads

Harmonic assessment EDS 08-0132 Planning Guidance for Disturbing Loads

HV cable testing ECP 11-0006 HV Insulation Testing

HV commercial requirements EDS 08-0141 HV Customer Supplies

HV connections arrangements EDS 08-0141 HV Customer Supplies

HV metering EDS 08-0141 HV Customer Supplies

HV network configuration EDS 08-0109 11/6.6kV Secondary Distribution Network Design

HV OHL testing ECP 11-0006 HV Insulation Testing

HV rural network design EDS 08-0109 11/6.6kV Secondary Distribution Network Design

HV switchgear testing ECP 11-0002 Secondary Commissioning Requirements

HV system earthing EDS 06-0016 Grid and Primary Substation Earthing Design

HV system short circuit values EDS 08-0109 11/6.6kV Secondary Distribution Network Design

HV testing ECP 11-0002 Secondary Commissioning Requirements

HV transformer testing ECP 11-0002 Secondary Commissioning Requirements

HV urban/suburban network design


HV voltage regulation EDS 08-0109 11/6.6kV Secondary Distribution Network Design

HV/LV cable and OHL recording


IDNO/ICP responsibilities EDS 08-0113 Guidance for the Application of ENA ER G88 and G81 Inset Networks (IDNOs and other licenced DNOs)

In air cable installations ECS 02-0019 Installation of Underground Cables LV to 132kV

Multi-occupied buildings EDS 08-0118 Multi-Occupied Building Supplies


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Document Title

Loads causing distortion of the supply voltage


LV connection arrangements EDS 08-0129 LV Customer Supplies up to 100A Single Phase


LV mains cables ECS 02-0019 Installation of Underground Cables LV to 132kV

LV metering EDS 08-0129 LV Customer Supplies up to 100A Single Phase

EDS 08-0123 LV Electrical Service Drawings


LV network design EDS 08-0136 LV Network Design

LV service cables ECS 02-0019 Installation of Underground Cables LV to 132kV

LV system earthing EDS 06-0016 LV Network Earthing Design

LV customer earthing EDS 06-0017 Customer Installation Earthing Design

LV system short circuit values EDS 08-0136 LV Network Design

LV testing ECP 11-0002 Secondary Commissioning Requirements

Materials EAS 01-0000 Overhead Lines

EAS 02-0000 Cables and Joints

EAS 03-0000 MV Switchgear


EAS 00-0005 Protection and Control

EAS 07-0000 Substation Civils

EAS 00-0008 LV Plant and Equipment


Minimum demand to be met after first and second circuit outage


Network resilience EDS 08-0109 11/6.6kV Secondary Distribution Network Design

EDS 08-0136 LV Network Design


New connections EDS 08-0109 11/6.6kV Secondary Distribution Network Design







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Document Title

Ownership boundaries EDS 08-0113 Guidance for the Application of ENA ER G88 and G81 Inset Networks (IDNOs and other licenced DNOs)







Ownership of risers and laterals


P2/6 assessment process EDS 08-0119 Guidance for the Application of ENA ER P2/6 Security of Supply

Plant and equipment recording EOS 09-0100 Site Recording of Cables Plant and Equipment

PLTU EDS 08-0114 Remote Control and Automation of HV Switchgear

Prospective short circuit current EDS 08-0136 LV Network Design

Rising and lateral earthing EDS 08-0118 Multi-Occupied Building Supplies

Street lighting EDS 08-0133 Unmetered Connections

Substation design EDS 07-0020 Civil Requirements for New Customer Supplies and Generation Connections

EDS 07-0102 Secondary Substation Civil Design Standards



Supply termination EDS 08-0129 LV Customer Supplies up to 100A Single Phase





Testing ECP 11-0006 HV Insulation Testing



Timing/delivery of site information



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Document Title

UK Power Networks responsibilities


Voltage fluctuation assessment EDS 08-0132 Planning Guidance for Disturbing Loads


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6 References

6.1 UK Power Networks Standards

EAS 01-0000 Approved Materials List for OHL

EAS 02-0000 Approved Equipment List - Cables and Joints

EAS 03-0000 Materials Approvals - MV Switchgear


EAS 00-0005 Protection and Control Equipment List

EAS 07-0000 Approved Substation Civil Equipment List

EAS 00-0008 LV Plant and Equipment Materials List



ECS 06-0022 Grid and Primary Earthing Construction




ECP 11-0006 HV Insulation Testing

EDS 06-0013 Grid and Primary Substation Earthing Design



EDS 06-0017 Customer Installation Earthing Design

EDS 07-0020 Civil Requirements for new Customer Supplies and Generation Connections

EDS 07-0102 Secondary Substation Civil Design Standards



EDS 08-0113 Guidance for the Application of ENA ER G88 and G81 Inset Networks

EDS 08-0114 Remote Control and Automation of HV Switchgear



EDS 08-0123 LV Electrical Service Drawings



EDS 08-0133 Unmetered Connections

EDS 08-0136 LV Network Design




EDS 08-0145 EHV Design



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EDS 12-0202a Distribution Site and Civils ART form

EDS 12-0202b Distribution Ground Mounted Switchgear Form

EDS 12-0202c Distribution Pole Mounted Switchgear Form

EDS 12-0202d Distribution TX and LV Type Form

EDS 12-0202e Battery Charger Form

EDS 12-0202f Pole Type Form

EDS 12-0202g Link Box Form

EDS 12-0202h OHL LV Services

EDS 12-0202j Protection Relays

EDS 12-0202k LV Pillar Inspection Form

6.2 National and International Standards

ENA ER G81 Part 1: Design and Planning. Framework for Design and Planning, Materials Specification, Installation and Records for Low Voltage Housing Development Installations and associated new HV/LV Distribution Substations

ENA ER G81 Part 2: Materials Specification. Framework for Design and Planning, Materials Specification, Installation and Records for Low Voltage Housing Development Installations and associated new HV/LV Distribution Substations

ENA ER G81 Part 3: Installation Records. Framework for Design and Planning, Materials Specification, Installation and Records for Low Voltage Housing Development Installations and associated new HV/LV Distribution Substations

ENA ER G81 Part 4: Framework for Design and Planning of Industrial and Commercial Underground Connected Loads up to and including 11kV

ENA ER G81 Part 5: Framework for Materials Specifications for Industrial and Commercial Underground Connected Loads up to and including 11kV

ENA ER G81 Part 6: Framework for Installation and Records of Commercial and Industrial Underground Connected Loads up to and including 11kV

ENA ER G81 Part 7: Framework for Contestable Diversionary and Reinforcement Underground and Overhead Works not exceeding 33kV and HV/LV Distribution Substations

ENA ER G87 Guidelines for the Provision of Low Voltage Connections to Multiple Occupancy Buildings

ENA ER G88 Principles for the Planning, Connection and Operation of Electricity Distribution Networks at the Interface between DNOs and IDNOs


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Appendix A – Design Information to be provided by ICPs

The following information shall be provided by ICPs for UK Power Networks to assess and agree to any proposed network designs.

Designs containing rising and lateral mains shall not be adopted by UK Power Networks. Reference to UK Power Networks EDS 08-0118 shall be made to ensure that the ownership boundaries and responsibilities comply with UK Power Networks Standards.

A.1 General Information

Site name with full postal address and postcode.

A site location map, with grid reference, outlining the site in relation to at least two streets or roads.

Maximum power requirement in kVA.

Completed network, civil and electrical designs:

Design to show cable size, cable depths and cross section along the cable routes.

Construction drawings where a substation is required, including plant layout, earthing and the small power and lighting.

List of materials to be used including manufacturer’s types and detailed specifications, with reference to UK/EU standards. Health and Safety Plan including the CDMC.

Programme of works.

A.2 Power Information

Data for calculation of demand should be determined by using the DEBUT program within UK Power Networks. Third parties may use comparable software packages available to them provided they can demonstrate they use equivalent data to produce comparable results. The calculated demand is dependent upon the number of connections, the diversity applied and the designer’s estimate of annual unit consumption.

For all sites:

Start current of the largest lift or other motors including starter type and frequency of start and frequencies and magnitudes of the harmonic rejection currents (thyristor soft start only).

The impact of any harmonics or generation on UK Power Networks’ local network. Dependent upon the type and magnitude of the load a detailed harmonic assessment may be required, the cost of which will be chargeable to the ICP. Voltage fluctuations and fault level increase caused by embedded generation may also be issues which could prevent the connection of embedded generation to some existing networks.

Then for each LV distribution cable:

Maximum feeder load per phase in amps.

Loss of volts along the cable.

Generation (where applicable).

Number of generators connected.

Export capacity per generator.

Starting characteristics.

Contribution to LV fault level per generator.


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For sites to be adopted by UK Power Networks:

Detail of type and load requirement of equipment to be connected, e.g. number and size of motors, cookers, showers, space and water heating arrangements including details of equipment which is subject to switching by the appointed supplier.

Maximum voltage regulation % from LV bus-bars of HV/LV substation to end of main.

A table based on the format shown in Table A-1 should be completed showing number of connections and estimated demand.

Table A-1 –Typical Customer Loads

Type Curve Number of Connections

Estimated Demand

1/2 Bed Gas C/h URLC

3 Bed Gas C/h URLC

4 Bed Gas C/h URMC

5+ Bed Gas C/h URHC

1/2 Bed Other C/h ESEVEN

3 Bed Other C/h ESEVEN

4 Bed Other C/h ESEVEN

5+ Bed Other C/h ESEVEN

E7 1 Heater / W/h ESEVEN




15kW Boiler ESEVEN

19kW Boiler ESEVEN

Retail/Office/Industrial/Other

Commercial

Totals

A table based on the format shown in Table A-2 should be completed for each distribution transformer.

Table A-2 –Typical Customer Distribution Transformer Data

Capacity Number of Customers Connected

Estimated MD


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A table based on the format shown in Table 6-3 should be completed for each LV distribution cable – Number of Customers and connections on each phase:

Table 6-3 –Typical LV Feeder Usage

Cable Ref No Phase R Y B

1 No. Customers

1 No. Connections

2 No. Customers

2 No. Connections

A.3 Maximum Earth Loop Resistance (for sites to be adopted by UK Power Networks)

For each service/feeder:

Maximum earth loop resistance (ohms) at cut-out position/feeder end.

Fuse sizes selected (amps).

Maximum clearance time (seconds):

For phase-to-earth fault at the remote end.

For phase-to-phase fault at the remote end.

A.4 Earthing, Fuse selection and Prospective Short Circuit Current (for sites to be adopted by UK Power Networks)

For each service:

Cut-out fuse size selected (amps).

Service earthing (PME, TT, etc.).

Design prospective short circuit current at LV bus-bars of HV/LV transformer (kA).

Maximum design prospective short circuit current at connection of service to main (kA), where applicable for:

1ph 230V.

2ph 230/460V.

3ph 230/400V.

A.5 Substations

For each substation:

An ESQCR risk assessment on the location of the substation and its appropriate enclosure type e.g. brick built, to comply with the perceived risk in area, flood risk etc.

A substation construction drawing showing detail of transformer plinth, foundation, duct entry, ventilation, earthing, power and lighting and access arrangements.

Plant with manufacturer type, specification and proposed layout within the substation with dimensions.


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A.6 Cable Layout and Information

A site layout to an appropriate standard scale to show sufficient detail overlaid with the proposed main and service cable design. The drawing should indicate the:

Cross sectional size type of each main and service cable,

Location and size/type of ducts to be used, location.

Rating of substations and location of link boxes.

In addition highway/footway to be adopted by local authority should also be clearly indicated.

A single line operational diagram indicating ownership boundaries shall also be provided.

A.7 Quality of Supply Implications of the Network Extension

Detail of overall impact on the quality of supply.

A.8 Legal Agreements

For all sites:

Name and contact details of the land owner.

Local authority area.

Name and contact details of the Solicitor or agent acting for the land owner.

Rights to be granted.

Legal drawings and draft legal agreements – substation lease, cable easement drawings and draft legal agreements.

All drawings to show clearly ownership boundaries.

A.9 Unmetered Supplies (for sites to be adopted by UK Power Networks)

In accordance with Elexon BSCP 520:

Classes of equipment.

Maximum demands per item(s).

Drawing showing locations and equipment.