Document Number: EDS 05-9112
Date: 06/08/2021
ENGINEERING DESIGN STANDARD
EDS 05-9112
TELEPROTECTION DESIGN
Network(s):
EPN, LPN, SPN
Summary:
Standard designs and arrangements for teleprotection schemes at all voltage
levels.
Author:
David Jeyakumar
Date:
06/08/2021
Approver:
Paul Williams
Date:
10/09/2021
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 version.
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THIS IS AN UNCONTROLLED DOCUMENT, THE READER MUST CONFIRM ITS VALIDITY BEFORE USE
Version: 2.0
Teleprotection Design
Document Number: EDS 05-9112
Version: 2.0
Date: 06/08/2021
Revision Record
Version
2.0
Review Date
23/04/2026
Date
06/08/2021
Author
David Jeyakumar
Reason for update: Publication on G81, inclusion of ‘End-to-end Underground Fibre’ designs,
requirement to keep fibres as operational spares, and requirement to ensure black start resilience.
What has changed:








Publication on G81.
Information for ICPs and IDNOs in the design selection flowcharts.
Information for ICPs and IDNOs in Table 6-1.
Instructions provided to ensure black start resilience, where applicable, in section 5.1.2.
Designs and flowcharts updated to allow ‘End-to-end underground fibre’.
Flowcharts updated with requirement to maintain a percentage of fibres for operational spares.
Drawings EDS 05-9112.111, 303, 311, 403, 411 and 501 updated
Minor corrections to some of the designs.
Version
1.0
Review Date
23/04/2026
Date
03/02/2021
Author
David Jeyakumar
New design standard for teleprotection.
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Teleprotection Design
Document Number: EDS 05-9112
Version: 2.0
Date: 06/08/2021
Contents
1
Introduction ............................................................................................................. 4
2
Scope ....................................................................................................................... 4
3
Glossary and Abbreviations ................................................................................... 4
4
Designs .................................................................................................................... 5
5
Design Selection for Projects ................................................................................. 6
5.1
Instructions ................................................................................................................ 6
5.1.1
General instructions................................................................................................... 6
5.1.2
Black start resilience (BSR) / electricity system restoration standard (ESRS) ............ 6
5.1.3
Using the communication system for SCADA ............................................................ 6
5.1.4
Complex Projects ...................................................................................................... 6
5.2
Instructions for Connections, Reinforcement, and Protection Asset Replacement ..... 7
5.2.1
11kV and 6.6kV ......................................................................................................... 7
5.2.2
33kV .......................................................................................................................... 8
5.2.3
132kV and 66kV ........................................................................................................ 9
5.3
Instructions for Pilot Cable Asset Replacement ....................................................... 10
6
Relevant Standards and Procedures ................................................................... 11
7
Cost Estimation Tools ........................................................................................... 12
8
References ............................................................................................................. 12
8.1
UK Power Networks Standards ............................................................................... 12
8.2
National and International Standards ....................................................................... 12
9
Dependent Documents.......................................................................................... 12
Figures
Figure 5-1 – Design flowchart for 11kV and 6.6kV teleprotection .......................................... 7
Figure 5-2 – Design flowchart for 33kV teleprotection ........................................................... 8
Figure 5-3 – Design flowchart for 132kV and 66kV teleprotection (part 1) ............................. 9
Figure 5-4 – Design flowchart for 132kV and 66kV teleprotection (part 2) ........................... 10
Tables
Table 4-1 – Standard designs ............................................................................................... 5
Table 6-1 – Relevant procedures and standards ................................................................. 11
© UK Power Networks 2021 All rights reserved
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Teleprotection Design
Document Number: EDS 05-9112
Version: 2.0
Date: 06/08/2021
1
Introduction
This engineering design standard details the standard designs and arrangements for
teleprotection schemes across all voltage levels. Teleprotection refers to the signalling and
communications between protection IEDs to quickly isolate faults. Examples are unit
protection and intertrip schemes.
Section 4 states the standard designs and arrangements.
Section 5 has instructions for selecting the applicable designs for a given project.
Section 6 states other applicable standards and procedures for teleprotection.
Section 7 introduces estimation tools that can be used for project costing (not applicable to
ICPs and IDNOs).
2
Scope
This document applies to teleprotection schemes at all voltage levels, driven by connections,
load reinforcement, and asset replacement.
3
Glossary and Abbreviations
Term
Definition
AFL
Organisation that supplies and installs fibre wrap systems
BSR
Black start resilience
ESRS
Electricity system restoration standard
ICP
Independent Connection Provider
IDNO
Independent Distribution Network Operator
IED
Intelligent electronic device
OFTN
Operational Fibre Telecoms Network; a fibre network connecting
approximately 200 substations across EPN and SPN.
OHL
Overhead line
Openreach
Owner and operator of UK-wide fibre infrastructure on which
communications services (referred to in this standard as Openreach
products) are provided.
POC
Point of connection
SCADA
Supervisory control and data acquisition
UG
Underground
UHF
Ultra high frequency
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).
© UK Power Networks 2021 All rights reserved
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Teleprotection Design
Document Number: EDS 05-9112
Version: 2.0
Date: 06/08/2021
4
Designs
Table 4-1 states the standard designs for teleprotection.
Table 4-1 – Standard designs
Design and Document
number
Design name
101
EDS 05-9112-101
11kV and 6.6kV Teleprotection – Overhead Line Fibre
102
EDS 05-9112-102
11kV and 6.6kV Teleprotection – Openreach Product
111
EDS 05-9112-111
11kV and 6.6kV Teleprotection - Substation Arrangements
301
EDS 05-9112-301
33kV Teleprotection - Overhead Line Fibre
302
EDS 05-9112-302
33kV Teleprotection - Openreach Products
303
EDS 05-9112-303
33kV Teleprotection - Connecting to the OFTN - Fibre Spur
304
EDS 05-9112-304
33kV Teleprotection - Connecting to the OFTN - Openreach Products
311
EDS 05-9112-311
33kV Teleprotection - Substation Arrangements
401
EDS 05-9112-401
132kV and 66kV Teleprotection - Overhead Line Fibre
402
EDS 05-9112-402
132kV and 66kV Teleprotection - Openreach Products
403
EDS 05-9112-403
132kV and 66kV Teleprotection - Connecting to the OFTN - Fibre
Spur
404
EDS 05-9112-404
132kV and 66kV Teleprotection - Existing OHL Fibre - POC is a
Splice Tower
405
EDS 05-9112-405
132kV and 66kV Teleprotection - Existing OHL Fibre - POC is NOT a
Splice Tower
405A
EDS 05-9112-405A
Underground Fibre to Existing Splice Tower
405B
EDS 05-9112-405B
Fibre Wrap from POC Tower to Splice Tower
405C
EDS 05-9112-405C
Create new Splice Tower
406
EDS 05-9112-406
132kV and 66kV Teleprotection - Connecting to the OFTN Openreach Product
411
EDS 05-9112-411
132kV and 66kV Teleprotection - Substation Arrangements
421
EDS 05-9112-421
132kV and 66kV - Protection IED Connection - Via Multiplexer
501
EDS 05-9112-501
End-to-end Underground Fibre
511
EDS 05-9112-511
Multiplexer Rack and Cabinet General Arrangement
521
EDS 05-9112-521
Protection IED Connection - Direct Fibre Teleprotection
522
EDS 05-9112-522
Protection IED Connection - Via Multiplexer
523
EDS 05-9112-523
Overhead Line Fibre - Tower Arrangements and Splicing
581
EDS 05-9112-581
UHF Voice Frequency Teleprotection
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Teleprotection Design
Document Number: EDS 05-9112
Version: 2.0
Date: 06/08/2021
5
Design Selection for Projects
5.1
Instructions
5.1.1
General instructions
Use the flowcharts in sections 5.2 to 5.3 to select the communications option(s) and designs.
5.1.2
Black start resilience (BSR) / electricity system restoration standard (ESRS)
Multiplexer systems and Openreach hardware shall be powered from substation SCADA
battery systems.
Therefore, where a site has a BSR requirement, this shall be assured as part of any
teleprotection works, as detailed in points a), b), and c) below.
Furthermore, even if a substation has no BSR requirement, the multiplexer and/or Openreach
circuit may be providing critical BSR communications for other sites (this could be the case if
the substation is part of the OFTN). In such a scenario, the substation SCADA batteries shall
be made BSR compliant, as per points a), b), and c) below. Consult UK Power Networks
Operational Telecoms department for clarification in this regard.
a) If a new substation, the multiplexer and Openreach hardware loading shall be factored into
the capacity/rating of the substation’s SCADA battery system.
b) If an existing substation where a new multiplexer system and/or Openreach hardware is
being installed, the increased loading on the existing SCADA battery system shall be
assessed and interventions carried out to ensure continued BSR compliance. This may
require enhancement or upgrade of the existing battery system or a full replacement of the
battery system.
c) Point b) also applies if an existing multiplexer or Openreach circuit is being modified, e.g.
by the addition or replacement of hardware cards, provision of new Openreach circuits,
etc.
5.1.3
Using the communication system for SCADA
To maximise asset utilisation and manage operational costs, the communication system
installed for teleprotection (as per this standard) shall also be used for SCADA
communications as per EDS 05-9111.
Furthermore, where a third-party owned premise is involved, security requirements shall be
implemented as per EDS 05-9111.
5.1.4
Complex Projects
The instructions in sections 5.2 to 5.3 are suited for the majority of projects that involve one
type of communications link between the substations. For more complex projects that involve
a mix of communications types between substations, these instructions shall be applied for
each teleprotection circuit, and then combined, in consultation with Operational Telecoms, to
produce the complete design and arrangement.
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Teleprotection Design
Document Number: EDS 05-9112
Version: 2.0
Date: 06/08/2021
5.2
Instructions for Connections, Reinforcement, and Protection Asset
Replacement
5.2.1
11kV and 6.6kV
Figure 5-1 – Design flowchart for 11kV and 6.6kV teleprotection
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Teleprotection Design
Document Number: EDS 05-9112
Version: 2.0
Date: 06/08/2021
5.2.2
33kV
Figure 5-2 – Design flowchart for 33kV teleprotection
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Teleprotection Design
Document Number: EDS 05-9112
Version: 2.0
Date: 06/08/2021
5.2.3
132kV and 66kV
Figure 5-3 – Design flowchart for 132kV and 66kV teleprotection (part 1)
© UK Power Networks 2021 All rights reserved
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Teleprotection Design
Document Number: EDS 05-9112
Version: 2.0
Date: 06/08/2021
Figure 5-4 – Design flowchart for 132kV and 66kV teleprotection (part 2)
5.3
Instructions for Pilot Cable Asset Replacement
The design selection flowcharts of section 5.2 are applicable, with the following additional
option:

UHF point-to-point radio for voice frequency teleprotection, for permanent deployment at
33kV, 22kV, and 11kV only. See design EDS 05-9112-581.
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Teleprotection Design
Document Number: EDS 05-9112
Version: 2.0
Date: 06/08/2021
6
Relevant Standards and Procedures
Table 6-1 states the standards and procedures for teleprotection systems.
Table 6-1 – Relevant procedures and standards
Activity
Procedure or standard
Information for ICPs &
IDNOs
Underground fibre
Fibre cables, ducts, chambers & joint closures
EAS 02-0000 & EAS 02-0080
Underground fibre installation
ECS 02-0066
Overhead line fibre
OPGW & OPPC, fittings, & joint closures
EAS 01-0000 & EAS 01-0331
Fibre wrap cables, fittings, and joint closures
EAS 01-0332
Condition considerations for OHL fibre
EDS 01-0058
OPGW/OPPC installation
ED1SON Alliance procedures
Fibre wrap installation
AFL procedures, carried out by
ED1SON Alliance
OHL fibre terminations
ECS 02-0068
By AFL-accredited
contractors only.
Openreach products
Openreach product planning, design & delivery
See Note 1 below.
Installing Openreach fibre in substations
ECS 02-0066
ICPs & IDNOs are NOT
permitted to carry this out.
Substation building fibre works
Substation fibre hardware
In progress
Multiplexer system
EAS 05-9000
Substation building fibre works
ECS 05-9212
Contact UK Power
Networks Operational
Telecoms for site-specific
design.
Optical fibre splicing and testing
Optical fibre splicing and testing
ECP 11-0009
UHF Voice Frequency Radio Teleprotection
Radio equipment
EAS 05-9231
Initial desktop study
Contact Operational Telecoms
UHF planning, design, and installation
Contact Operational Telecoms
SCADA
Utilising the teleprotection system for SCADA
EDS 05-9111
Note 1 – the documents for planning, design, and delivery of Openreach products are located at the following
Alfresco location and link - Documents / Reference Library / SCADA and Operational Telecoms / OFTN /
Openreach Products (Alfresco link)
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Teleprotection Design
Document Number: EDS 05-9112
Version: 2.0
Date: 06/08/2021
7
Cost Estimation Tools
Cost estimation tools for certain types of teleprotection schemes are located in Alfresco at the
following path and link:
Documents / Reference Library / SCADA and Operational Telecoms / OFTN / Cost Estimation
Tools (Alfresco link)
As these tools include commercial information from UK Power Networks’ contracts, they
cannot and shall not be provided to ICPs or IDNOs.
8
References
8.1
UK Power Networks Standards
EAS 01-0000
Approved Materials List - Overhead Lines
EAS 01-0331
Overhead Line Fibre Optic Conductors
EAS 01-0332
Optical Fibre Wrap Cables and Associated Components
EAS 02-0000
Approved Equipment List - Cables and Joints
EAS 02-0080
Underground Fibre Optic Cables
EAS 05-9000
Approved Equipment List - RTU and Control Equipment
EAS 05-9231
Radio Systems by Westica Communications
ECP 11-0009
Optical Fibre Splicing, Testing and Commissioning Procedure
ECS 02-0066
Underground Optical Fibre Installation
ECS 02-0068
Overhead Lines Optical Fibre Splices and Terminations
ECS 05-9212
Substation Building Fibre Works
EDS 01-0058
Condition Consideration when Planning Overhead Line Fibre
EDS 05-9111
Operational Communications Design
8.2
National and International Standards
N/A
9
Dependent Documents
The documents below are dependent on the content of this document and may be affected
by any changes.
EDS 05-9111
Operational Communications Design
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