eds 08-4100 ehv customer demand and generation...

Document Number: EDS 08-4100

Version: 1.0

Date: 29/11/2017

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ENGINEERING DESIGN STANDARD

EDS 08-4100

EHV CUSTOMER DEMAND AND GENERATION SUPPLIES

Network(s): EPN, LPN, SPN

Summary: This standard provides guidelines for new EHV customer demand and generation connections at 33kV, 66kV or 132kV and existing supplies where an increase in supply capacity requires equipment to be replaced.

Author: Stephen Cuddihey Date: 29/11/2017

Approver: Barry Hatton Date: 28/12/2022

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

EHV Customer Demand and Generation Supplies Document Number: EDS 08-4100

Version: 1.0

Date: 29/11/2017

© UK Power Networks 2017 All rights reserved 2 of 22

Revision Record

Version 1.0 Review Date 28/12/2022

Date 29/11/2017 Author Stephen Cuddihey

New standard to cover EHV customer demand and generation connections. The relevant contents from EDS 08-0145, EDS 08-0051 and EDS 08-151 have been incorporated


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Date: 29/11/2017


Contents

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

2 Scope ....................................................................................................................... 5

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

4 Technical Requirements ......................................................................................... 7

4.1 Voltage Availability .................................................................................................... 7

4.2 Fault Level Constraints .............................................................................................. 7

4.3 Power Factor ............................................................................................................. 7

4.4 Voltage Control .......................................................................................................... 7

4.5 Power Quality Monitoring........................................................................................... 7

4.6 Minimum Scheme Design .......................................................................................... 8

5 Connection Arrangements ...................................................................................... 9

5.1 132kV Connections ................................................................................................... 9

5.2 33kV Connections ................................................................................................... 14

5.3 33kV Connections of Higher Than Normal Security ................................................. 16

6 Installation Requirements ..................................................................................... 17

6.1 Responsibilities ....................................................................................................... 17

6.2 Accommodation for Switchgear ............................................................................... 17

6.3 Earthing ................................................................................................................... 18

6.4 Ownership Boundary ............................................................................................... 18

6.5 Access Requirements .............................................................................................. 18

6.6 SCADA, Remote Control and Monitoring ................................................................. 18

6.7 Protection and Control ............................................................................................. 19

6.8 Parallel Operation and Interlocking .......................................................................... 19

6.9 Emergency Trip ....................................................................................................... 19

6.10 LVAC Supplies ........................................................................................................ 19

7.3 Connection Agreement ............................................................................................ 20

7.4 Site Responsibility Schedule ................................................................................... 21

8 References ............................................................................................................. 22

8.1 UK Power Networks Standards ............................................................................... 22

8.2 National and International Standards ....................................................................... 22

9 Dependent Documents.......................................................................................... 22


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Figures

Figure 5-1 – Tee Connection from 132kV Overhead Line ................................................... 10

Figure 5-2 – Loop Connection from 132kV Overhead Line .................................................. 11

Figure 5-3 – New 132kV Circuit from a GSP ....................................................................... 12

Figure 5-4 – New 132kV Banked Circuit from a GSP .......................................................... 12

Figure 5-5 – New Circuit from 132kV Substation ................................................................. 13

Figure 5-6 – Tee Connection from an Existing 33kV Radial Overhead Circuit ..................... 14

Figure 5-7 – Loop Connection from an Existing Overhead or Underground Circuit ............. 15


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1 Introduction

This standard provides guidelines for new EHV customer demand and generation connections at 33kV, 66kV or 132kV and existing supplies where an increase in supply capacity requires equipment to be replaced.

The standard for new and additional customer EHV metered supplies shall be used where:

The customer’s load or generation has a maximum power requirements above 15MVA.

The customer’s site covers a large geographic area which would require EHV or HV distribution.

Due to disturbing loads, reverse power limitations, circuit-breaker limitations or other HV network limitations, a point of common coupling at HV would result in a disruption to other customers.

The customer specifically requests an EHV connection.

It is the intention of this standard to provide clear and consistent guidelines to support designers and planners when undertaking new customer connections with specific guidance on EHV network arrangement for loads to be provided from the EHV distribution network and loads requiring the installation of new EHV feeders.

2 Scope

This standard applies to all EHV customer direct demand and generation connections at voltages from 33kV up to 132kV.

This standard does not apply to customer supplies for the LPN 33kV Distribution Network; refer to EDS 08-0150.

This standard applies to connections provided for licensed Independent Distribution Network Operators (IDNOs), except where otherwise required by EDS 08-0113.

This standard does not apply to primary substation provision. Customers requiring an EHV provision for supply at HV voltages shall be supplied by means of a primary substation of sufficient capacity to provide the customer maximum power or generation requirement in accordance with EDS 08-4000.

EHV connections shall not be available for customer generation or demand maximum requirements below 7.6MVA requested at 11kV (or 4.5MVA at 6.6kV), reinforcement of the HV network shall be required for provision of these capacities.

Single EHV connections and multiple EHV connections in aggregate that present a reverse power value in excess of 49.9MW, shall require a National Grid statement of works prior to acceptance. This statement is at the discretion of National Grid and may prohibit connection at the desired location or voltage but is outside the control of UK Power Networks.

This standard supersedes the customer connection elements in:

EDS 08-0051 - Customer Supplies 6.6kV to 33kV – Notes of Guidance for New Demand and Generation Connections.

EDS 08-0151 – Customer Supplies at 132kV and 66kV – Notes of Guidance for New Demand and Generation Connections.

EDS 08-0145 – EHV Design.


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3 Glossary and Abbreviations

Term Definition

CT Current Transformer

EHV Voltages above 11kV. These may be both transmission and distribution networks depending on location and requirement

HV Voltages above 1000V; generally used to describe 11kV or 6.6kV distribution systems but may include higher or other legacy voltages

ICP Independent Connections Provider

IDNO Independent Distribution Network Operator

LV Voltages up to 1000V; generally used to describe 230/400V or 230/460V distribution systems

MPR Maximum Power Requirement (in MVA)

Primary Substation A substation with an EHV operating voltage which may include transformation to HV or LV

SCADA Supervisory Control and Data Acquisition

RTU Remote Terminal Unit

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).

VT Voltage Transformer


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4 Technical Requirements

4.1 Voltage Availability

Where a choice of EHV voltage is available, connections shall be made to the highest voltage available.

4.2 Fault Level Constraints

Refer to EDS 08-1110.

4.3 Power Factor

Unless otherwise agreed the customer shall ensure that the import and export power factor is maintained between 0.95 lagging and 0.95 leading.

4.4 Voltage Control

The proposed connection of a generation scheme may affect the correct operation of the automatic voltage control (AVC) scheme at a grid or primary substation.

Circumstances where this may arise are:

In instances where the grid or primary transformers may be subjected to reverse power flow as a consequence of the generation connection;

Where the generator provides a significant proportion of the site maximum demand and the AVC scheme relies on line/load drop compensation.

The voltage control scheme shall be assessed to determine if it will continue to operate correctly or whether it needs full or partial replacement.

Additionally the reverse power capability rating of the tap changer at the grid or primary substation shall be checked to ensure it is not compromised. Where any necessary replacement, modifications or servicing recommended by the manufacturer shall be carried out as a part of the new connection project prior to the generating plant being connected.

All replacement costs shall be apportioned in accordance the provisions of the UK Power Networks Common Connection Charging Methodology.

Refer to the voltage control standards for further details.

4.5 Power Quality Monitoring

A power quality meter shall be installed for the long term monitoring of the connection to ensure that planning or compatibility levels of harmonic distortion are not exceeded. Refer to EDS 08-1901 for additional information.


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4.6 Minimum Scheme Design

A “solid” connection, where no means of isolation is present between distribution network and customer connection, is not acceptable for connection to the EHV distribution network.

For all EHV customers the minimum cost scheme shall be the most cost efficient method to provide the customer’s maximum power requirement in accordance with EDS 08-4000.

All EHV connections shall employ a means of isolation to the customer point of supply and this point of isolation shall form the UK Power Networks ownership boundary.

If the EHV customer has the appropriate legal entitlement to operate in the public highway and EHV competence, a point of connection and supply may be granted at the outgoing cable terminations of a busbar circuit-breaker in an available primary substation, the circuit-breaker forming the point of isolation.

Where a customer requires a point of connection on-site, a powered isolator shall be the minimum requirement. A circuit-breaker is recommended and may be required dependent upon network configuration, protection and operational restrictions, for example network complexity. LVAC supply to the point of isolation shall be provided in accordance with EDS 08-1112.

It should be noted that load transfers at HV shall not be considered for the provision of EHV customer supplies.


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5 Connection Arrangements

5.1 132kV Connections

5.1.1 Overview

In the following sections, consideration shall be given at all times to protection settings, its sensitivity and zone reach, impedance increase, fault levels and implications to the voltage control scheme. Schemes shall be replaced as necessary.

In the following diagrams, feeder and transformer circuit-breakers are distributed between both sets and all sections of busbars as required for the local network configuration dependent upon loading, protection and fault level criteria. This will also determine which bus section / coupler circuit-breakers are normally open and if auto switching is required.

It may be inappropriate to provide connection from the 33kV or 66kV primary networks for one or more of the following reasons:

No primary infrastructure in the vicinity of the development.

The development is adjacent to an existing 132kV circuit.

The generator output or MPR cannot be accepted on the primary network by virtue of excessive fault level, voltage rise, reverse power flow or inadequate thermal capacity.

Where it is demonstrably economic to provide the connection at 132kV such an arrangement shall be offered irrespective of the agreed capacity requested. UK Power Networks owned 132kV switchgear and equipment shall generally be of open terminal outdoor design subject to compliance with environmental safety standards. Refer to HSS 01-020 for more guidance. The customer shall make the necessary land available within the development site.

In areas where the infrastructure is predominantly of direct 132/11kV transformation and no lower voltage primary networks exist, customer connections of greater than 15MW will invariably be provided with 132kV points of connection. However, where due to physical or technical constraints it is impractical or uneconomical for a 132kV supply to be provided to the generator site a 132/11kV transformer may be provided at an existing UK Power Networks 132kV site. Refer to EDS 08-4000 for further information.


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5.1.2 132kV Overhead Line Tee Connection

Where a proposed development site is traversed by an existing 132kV overhead line a tee connection may be the optimum technical and economic means by which the connection is provided as shown in Figure 5-1.

Refer to drawings EDS 05-0002-013 and 014 for a block diagram showing the protection scheme at the point of connection. Refer to EDS 05-0002 for generic block diagrams and specific protection and control scheme requirements for the customer supply.

Tee connections from 132kV networks shall only be provided if the resultant network meets the required UK Power Networks operational standards, is compliant with EDS 08-0119, and a satisfactory protection system can be achieved.

Note: A 132kV tee connection shall be provided with a means of isolation; a ‘solid’ or non-isolatable connection shall not be accepted.

Indicative

arrangement

only

M

Figure 5-1 – Tee Connection from 132kV Overhead Line


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5.1.3 132kV Overhead Line or Underground Cable Loop Connection

Where the existing 132kV circuit is protected by a unit protection scheme this will require that the protection be modified to provide a ‘three ended’ configuration. If this cannot be achieved it may then be necessary to provide a 132kV loop connection as in Figure 5-2.

In addition to providing two discrete unit protection zones this arrangement may, subject to the configuration of the network, provide additional security to the customer.

Where the existing 132kV circuit is an underground cable a tee connection can only be provided by means of a cable termination with isolator compound at the tee off position. Therefore a loop connection as shown in Figure 5-2 is the preferred means by which supply can be provided from a cable circuit.

Refer to drawings EDS 05-0002-016 and 017 for block diagrams showing the protection scheme at the point of connection. Refer to EDS 05-0002 for generic block diagrams and specific protection and control scheme requirements for the customer supply.

Indicative

arrangement

only

M

Figure 5-2 – Loop Connection from 132kV Overhead Line


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5.1.4 132kV Substation Connection

Connections may also be provided directly from an existing 132kV site. This may be from a 400kV or 275kV supergrid substation by means of extension to an existing double-busbar arrangement as shown in Figure 5-3.

Refer to drawings EDS 05-0001-0206 and 0207 for block diagrams showing the protection scheme requirements at the point of connection. Refer to EDS 05-0002 for generic block diagrams and specific protection and control scheme requirements for the customer supply.

Subject to satisfying protection, complexity and operational constraints, the connection may be banked with an existing circuit as shown in Figure 5-4.

Refer to drawing EDS 05-0001-0201 for block diagrams showing the protection scheme requirements. Refer to EDS 05-0002 for generic block diagrams and specific protection and control scheme requirements for the customer supply.

Indicative

arrangement

only

M

Indicative

arrangement

only

M

Figure 5-3 – New 132kV Circuit from a GSP Figure 5-4 – New 132kV Banked Circuit from a GSP


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Where the customer site is not in proximity of a grid supply point, a 132kV connection may be provided from a 132/33kV or 132/11kV grid substation as shown in Figure 5-5. The connection arrangement will depend upon the customer’s requirements for security and available space at the substation.

Refer to drawings EDS 05-0002-008 and 012 for block diagrams showing the protection scheme requirements at the point of connection. Refer to EDS 05-0002 for generic block diagrams and specific protection and control scheme requirements for the customer supply.

M

132/33kV

Figure 5-5 – New Circuit from 132kV Substation


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5.2 33kV Connections

5.2.1 33kV Overhead Line Tee Connection

An underground cable connection may be provided from a 33kV overhead line via a tee with an isolation as shown in Figure 5-6. The device controlling the customers’ connection may be either a rated disconnector or a circuit-breaker and surge arresters shall be installed on the incoming cable termination.

As 33kV circuits require isolation at tee connections, it is not feasible to provide a tee connection for underground 33kV connections, therefore a loop connection shall be provided as the minimum scheme (refer to Section 5.2.2.).

In instances where the 33kV circuit to which the connection is to be made is protected by unit or distance protection or operates as a transformer feeder circuit with overall protection additional 33kV circuit-breakers shall be provided as required. This arrangement will also be required where the 33kV circuit is part of a mesh network or where the circuit complexity is such that a tee connection would not be permitted. Refer to Section 5.2.2.

Where wayleaves and consents are readily available the connection from the tee point to the customer site may be by means of an overhead line circuit with appropriate isolation at the tee point.

Refer to EDS 05-0002 for generic block diagrams and specific protection and control scheme requirements.

Note: The customer shall be made aware that with a tee connection the connection cannot be maintained during network outages, whether a fault or maintenance driven.

132/33kV

33kV O/H

line circuit

Pole mounted

disconnector M

Figure 5-6 – Tee Connection from an Existing 33kV Radial Overhead Circuit


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5.2.2 33kV Underground Cable Loop Connection

A connection from a 33kV underground cable shall be provided via a loop connection as shown in Figure 5-7.

Refer to EDS 05-0002 for generic block diagrams and specific protection and control scheme requirements.

132/33kV

To customer

owned

equipment

M

Note: feeder and

transformer CBs are

distributed between both

sets and all sections of

busbars

Figure 5-7 – Loop Connection from an Existing Overhead or Underground Circuit


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5.3 33kV Connections of Higher Than Normal Security

For reasons of economics or contractual obligation some customers may not wish to be constrained by network outages. They may require being available for output at any time when called upon and the risk of a ‘single leg’ connection may be unacceptable.

The security arrangements will need to be discussed at an early stage to quantify the required network availability and determine the level of risk of the point of connection, defining the strategy options that are available. Generally, this will apply to larger generating stations, or sites comprising multiple generators and customers where generation is powered by a bi-product of their primary process such as heat or methane.

In order to achieve the required network configuration or flexibility two discrete connections using circuit-breakers are required; each connection shall be designed around the arrangements shown in Figure 5-6 and Figure 5-7.

However if this is likely to have undesirable consequences, due to the configuration of the customer’s installation, it may be necessary to terminate all circuits on a single switchboard with a bus-section circuit-breaker to facilitate busbar maintenance or to cater for a busbar fault. This arrangement also offers greater security to the customer.

In the event that a generating station is proposed adjacent to an existing 33kV dual circuit overhead line or where two lines are in close proximity both circuits may be teed.

In the absence of 33kV network in the proximity of a proposed generating station or where network analysis shows that load flow, fault level or voltage rise constraints cannot be achieved; a duplicate connection shall be provided from the nearest 132/33kV grid or primary substation. The 33kV switchgear arrangement at the customer’s premises may be of either open terminal or metalclad indoor design subject to site constraints.

Connections involving more than two 33kV circuits should generally not be offered as it is unlikely that the level of generation requiring such a connection could be accepted on the 33kV network and neither is it likely to be the most economical solution.


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6 Installation Requirements

6.1 Responsibilities

UK Power Networks, an appointed contractor or suitably authorised ICP is responsible for the following:

Supply and install incoming EHV switchgear and metering circuit-breaker up to and including the metering unit or CTs and VTs.

Supply and install control and protection equipment including (where appropriate) batteries, relays, chargers, RTUs, cabling and auxiliary wiring.

Supply and install incoming EHV cables, jointing and jointing materials.

Supply and install metering facilities including multicore cable, fixings and terminations, meter cabinet including test block.

Terminate customer’s EHV and emergency tripping cables (labour only).

Supply substation locks or access system to UK Power Networks’ standard (UK Power Networks will also supply for ICP build).

The customer is responsible for the following:

Supply and install the earthing system for the substation to UK Power Networks’ approved design.

Supply and install the EHV cable and termination kits for connection by UK Power Networks to the metering unit or circuit-breaker and install cable then terminate customer’s end.

Provide all necessary arrangements to facilitate cable and equipment installation e.g. in exceptional cases winching eyes or posts may be required.

Supply and install weatherproof accommodation for metering cabinet and ducts for metering multicore cables.

Supply and install emergency trip facility in accordance with EDS 08-0149.

Supply and install the internal building services including lighting, power and heating/de-humidification (where required). Note the LV supply shall be provided in accordance with Section 6.10.

Unless otherwise stated, responsibilities for contestable elements shall be decided at the design stage.

6.2 Accommodation for Switchgear

All EHV supplies will require a new primary substation or compound site and UK Power Networks’ designers shall ensure this is recognised by the customer at the initial stages of customer enquiries.

Bespoke designs will be required for civil works relating to customer HV supplies where indoor multi-section extensible switchgear is used. The switchroom design shall comply with EDS 07-0020 and EDS 07-0105.


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6.3 Earthing

Refer to EDS 06-0019 for all aspects of earthing design and construction associated with EHV connections.

All substation earthing designs shall be approved by UK Power Networks before construction. The customer shall provide a comprehensive earthing report with supporting calculations and associated earthing drawings to enable the design to be assessed.

6.4 Ownership Boundary

The ownership boundary shall be at the outgoing terminals of the UK Power Networks switchgear and shall be indicated on operational diagrams.

The customer shall:

Provide, install, own and maintain all the cables from the UK Power Networks point of supply.

Terminate and connect all cables within their own installation to their equipment.

The customer shall not terminate the customer EHV cable onto UK Power Networks equipment; UK Power Networks or suitably authorised ICP staff shall connect the terminated EHV customer cable to the incoming supply equipment.

No customer access to UK Power Networks equipment shall be provided.

Physical separation shall be maintained between the UK Power Networks equipment and any customer owned equipment.

Note: IDNOs shall refer to EDS 08-0113.

6.5 Access Requirements

UK Power Networks staff, representatives or ICPs with appropriate authorisation shall be provided with full access to the UK Power Networks substation. 24-hour access requirements for personnel and plant shall be available. The substation shall be suitably located at ground level. There shall be adequate provision for installation and maintenance of cables. The proposed site shall be a safe place of work.

Expected activities are:

To lay incoming cables into the substation.

To install plant and equipment in the substation.

To install the metering termination box and the multicore cable from the substation.

To operate in an emergency.

6.6 SCADA, Remote Control and Monitoring

Remote control and monitoring shall be provided in accordance with EDS 05-0002.

All substations shall include an RTU and appropriate communication equipment.


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6.7 Protection and Control

The protection requirements should be discussed with the customer at early stage and include any requirements for directional overcurrent or neutral voltage displacement (NVD) protection and, where required, matching equipment is specified for both UK Power Networks and the customer’s switchgear.

Protection scheme studies shall be carried out to ensure the viability of any proposed protection scheme before the network design is finalised.

Refer to EDS 05-0002 for specific protection scheme requirements, including the above, and generic block diagrams.

6.8 Parallel Operation and Interlocking

Where multiple incoming supplies create the potential to parallel the UK Power Networks distribution network across the customer’s network, the customer shall provide a mechanical or electrical interlocking system in accordance with EDS 08-0149. If automatic changeover between main and alternative supplies is required this shall be accomplished on the customer’s equipment.

Where the customer requires exceptional security of supply and if the network operates in parallel on the UK Power Networks side of the metering circuit-breakers, parallel operation between metering points may be permitted subject to the approval of UK Power Networks

Where parallel operation is permitted the customer shall install unit protection to integrate with UK Power Networks owned and approved protection relays fitted to the metering circuit-breakers.

The details of arrangements for interlocking and any permitted load transfer between supplies shall be written into the site responsibility schedule and also into the connection agreement.

6.9 Emergency Trip

A customer emergency trip facility shall be provided in accordance with EDS 08-0149 where required.

6.10 LVAC Supplies

An LV supply shall be provided in accordance with EDS 08-1112.

The supply shall be monitored by UK Power Networks SCADA system.


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7 Commercial Requirements

7.1 Land Rights and Legal Requirements

Necessary land rights shall be secured before starting construction as detailed in EDS 07-0020.

7.2 Metering

Boundary metering shall be used for all EHV customer supplies.

It should be noted that the supply cannot be connected until an energy supplier and meter operator have been appointed by the customer, and a meter has been fitted and commissioned or a portfolio billing arrangement has been agreed.

Note: Metering arrangements for IDNOs are detailed in EDS 08-0113.

7.3 Connection Agreement

A site specific connection agreement shall be provided and in addition to the standard clauses, clauses to cover any site specific requirements shall be included. This should include but not be limited to, the following customer specific requirements:

The proportion of firm and unfirm MPR for export and import.

The maximum generation capacity to be connected and run in parallel with the distribution system.

Location of generator sites with location plans or where detailed information is not available for projects that are still in a development stage, the nearest accessible boundary position to the point of connection.

Generator fuel type (e.g. steam turbine, solar farm etc.).

Type of generator i.e. synchronous, asynchronous, inverter connected etc.

Rating of generator in both MW and MVAR.

Rating of the Prime Mover in MW.

Where generation is inverter connected, the type and fault output capability of the inverter and type test certificate.

Customers with more than one intake position.

Customers with higher than normal security or lower than normal security where the customer has specifically requested that lower level of security to minimise costs.

Customer’s supplied from more than one primary substation or grid supply point.

Customers opting for connections which do not meet the UK Power Networks requirements for minimum cost schemes.

Disturbing loads requiring special conditions and associated constraints such as the maximum frequency of motor starts or equivalent constraints.

Seasonal or dynamic demand limits.

Waiver of compensation rights if generation customer requests teed supply in place of ringed.

Supplies to Inset Networks.

Special customer load, for example battery load to meet the National Grid fast response to frequency change scheme.

Special schemes the customer is part of such as Flexible Distributed Generation or the Kent Active Management System.


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7.4 Site Responsibility Schedule

Prior to energisation a Site Responsibility Schedule shall be completed.

This Site Responsibility Schedule shall also include, where relevant the requirements for interlocking between intake points and requirements for switching procedures when making and breaking parallels between intake points.

Refer to CON 05 112 and NOP 10 015 for further information.


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8 References

8.1 UK Power Networks Standards

EDS 05-0001 132kV Grid and Primary System Protection and Control Schemes

EDS 05-0002 Protection and Control Schemes for Customer Demand and Generation Connections

EDS 06-0019 Customer EHV and HV Connections (including Generation) Earthing Design and Construction Guidelines

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

EDS 08-0113 Guidance for the Application of ENA Engineering Recommendation G88 and G81 Inset Networks (IDNO's and other licenced DNO's)

EDS 08-0149 Customer Interface Systems

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

EDS 08-1110 Fault Levels

EDS 08-1112 Substation LVAC Supplies

EDS 08-1901 EDS 08-1901 Guidance for the Connection of Customer's Disturbing Loads

EDS 08-3100 HV Customer Demand and Generation Connections

EDS 08-4000 EHV Network Design

HSS 01-020 Undertaking Environmental Risk Assessments

CON 05 112 Procedure for Creating a Site Responsibility Schedule - HV Customer Supplies

NOP 10 015 HV Site Responsibility Schedules

8.2 National and International Standards

ENA ER P2/6 Security of Supply

ENA ER G59 Recommendations for the Connection of Generating Plant to the Distribution Systems of Licenced Distribution Network Operators

9 Dependent Documents

The documents below are dependent on the content of this document and may be affected by any changes.

EDS 08-1103 Multi-Occupied Building Supplies

EDS 08-2000 LV Network Design

EDS 05-0001 132kV Grid and Primary System Protection and Control Schemes

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

EDS 08-0148 Appendices to ENA ER G81

EDS 08-2100 LV Customer Supplies

EDS 08-2102 LV Customer Unmetered Supplies

EDS 08-3000 HV Network Design

EDS 08-3100 HV Customer Demand and Generation Connections

EDS 08-4000 EHV Network Design