Code of Practice 615
Issue 4
March 2015
Substation, Circuit and
Plant Identification
Contents
1
Scope
2
General
3
Definitions
4
Substation Names
5
GSP, BSP and Primary Substations, and
Associated Networks
6
Distribution
Networks
7
Pole Mounted Equipment
8
Circuit Labelling
9
Documents Referenced
10
Keywords
Substations
and
Associated
Appendices A to H
Authorised for issue by the
Technical Policy Panel
©
2015
Electricity
North
West
Limited
All rights reserved
The copyright of this document, which contains information of a proprietary
nature, is vested in Electricity North West Limited. The contents of this
document may not be used for purposes other than that for which it has been
supplied and may not be reproduced, either wholly or in part, in any way
whatsoever. It may not be used by, or its contents divulged to, any other
person whatsoever without the prior written permission of Electricity North
West Limited.
Electricity North West Limited. Registered in England & Wales. Registered No. 2366949. Registered Office: 304 Bridgewater Place, Birchwood Park, Warrington, WA3 6XG
Amendment Summary
Amendment
No.
Date
0
Brief Description and Amending Action
Issue 1
10/12/99
CP615 - New Issue
1
Prepared by: DSD
Issue 1
25/04/01
0
31/01/06
Authorised by:
Clause 4.10 (c) added. Page E2 added – examples of 33kV teed
transformers and feeders. Typographical error corrected on Page A1.
Prepared by: DSD
Issue 2
Authorised by:
Detail added to labelling of LV distributor fuseways at section 6.8. Other
revisions and clarifications. Rebadged United Utilities.
Prepared by Peter Leather
0
02/03/07
Approved by the Technical Policy Panel and signed on its behalf by
Simon Rushton:
Issue 3
Merged with EPD601 Clarifications and other minor amendments.
Prepared by Peter Leather
1
08/12/10
Approved by the Technical Policy Panel and signed on its behalf by
Simon Rushton:
Issue 3
Requirement to show highest voltage on substation nameplate removed
(4.10). Numbering of ways of LV distribution fuseboards clarified (6.8.1).
Additional requirement for marking the numbers of new link-boxes
(6.8.5.1).
Prepared by Peter Leather
Approved by the Technical Policy Panel and signed on its behalf by Paul
Whittaker.
0
12/03/15
Issue 4
Clarification for naming substations associated with generating sites
added in section 4.11. New template applied.
Prepared by Peter Twomey
Approved by the Technical Policy Panel and signed on its behalf by Paul
Whittaker.
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SUBSTATION, CIRCUIT AND PLANT IDENTIFICATION
1.
SCOPE
1.1
This Code of Practice (CP) describes the method of naming and labelling substations,
circuits and plant that form part of the distribution network operated by Electricity North
West Limited, hereinafter referred to as Electricity North West, and covers all voltages.
1.2
EPD601 – Substation, Plant and Circuit Identification and CP615, Issue 2 have been
merged to form this current issue, which supersedes both the former documents.
2.
GENERAL
2.1
Clear and unambiguous naming and labelling is a major factor in reducing human error
switching incidents on the Electricity North West distribution Network (Network).
2.2
This CP applies to all substations, plant and apparatus comprising the Network. This CP
is not intended to be retrospective, but where work is being done on the network, the
opportunity shall be taken to make modifications that will apply this policy to existing
substations, plant and apparatus.
2.3
It is recognised that there may be technical or operational reasons that make noncompliance with this CP desirable in some circumstances or that some unusual circuit
arrangements are not adequately covered. In these cases the proposed arrangements
shall be agreed, in writing, with the Network Planning Policy Manager, Network Strategy.
2.4
All substations, circuits and plant installed by third parties for adoption by Electricity North
West shall be labelled in accordance with specific written instructions from Electricity
North West in accordance with this CP.
2.5
All diagrams in the attached appendices are for illustrative purposes only.
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3.
DEFINITIONS
GSP
Grid Supply Point (a substation shared with NGET, at which the
Network is connected to that of NGET)
BSP
Bulk Supply Point (a substation, with 132kV to lower voltage
transformers)
NGET
National Grid Electricity Transmission
CEGB
Central Electricity Generating Board
Primary
Substation
33kV to lower voltage substation
Distribution
Substation
11 or 6.6kV to 400/230V substation or 11kV to 6.6kV substation
Network
The electricity distribution network, owned and operated by
Electricity North West.
Switching Station
Substation, as defined by the Electricity Safety, Quality and
Continuity Regulations 2002, containing switchgear, but no power
transformer
MAMS
Master Asset Management System
PMT
Pole-Mounted Transformer (not a substation within the definition of
the Electricity Safety, Quality and Continuity Regulations 2002).
4.
SUBSTATION NAMES
4.1
One name shall be selected and used through all stages of development. It should not
be easily confused with others on the same network and should preferably assist in the
location of the substation.
4.2
The name shall be allocated as soon as the site is fixed. The name, ten-figure grid
reference and MAMS reference shall be added to a central index and used without
variation from thereon.
4.3
The use of company names for substations shall be avoided, wherever there is a
practicable alternative, which, nevertheless, provides sufficient indication of the location.
4.4
Where a substation is replaced at the same site, the existing site reference in MAMS
shall continue to be used throughout. No new site record shall be created in such cases.
However, an exception might arise in the case of a GSP and, in such circumstances,
agreement shall be obtained from the Regional Control Manager, NGET as to how the
transition will be managed. It might also be appropriate to inform and consult the System
Development and Planning Manager, the Operations and Maintenance Strategy
Manager and the Network Operations Centre Manager, NGET.
4.5
Where a substation comprises several adjacent but separate buildings and compounds,
they shall all have the same name. For example, if in Anytown, there are on one site, or
on a number of adjacent sites, 132kV sealing ends and disconnectors, 132/33kV
transformers, 33kV switchgear, 33/11kV transformers, 11kV switchgear, an 11kV/LV
transformer and a LV distribution fuseboard, all this equipment shall be regarded as
forming parts of one substation, to be named Anytown BSP.
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4.6
The designation ‘GSP’ is reserved for substations shared with NGET.
4.7
A BSP substation name shall take the name of the area it serves which shall, where
practicable, represent the localities of the associated primary substations.
4.8
A primary substation shall take the name of the locality it serves.
4.9
Subject to sub-section 4.3, a distribution substation shall take the name of the road or
street in which it stands, or from which access is obtained. Additional substations in the
same street shall be uniquely named; for this purpose, the addition of “Switching Station”
shall not make sufficient difference.
4.10
Substation nameplates shall be in accordance with ES356 and shall contain the following
information:
4.11
(a)
Substation name with suffix GSP, BSP, Primary or Switching Station. No suffix is
required for sites with HV/LV power transformers and no voltage above 11kV.
(b)
Substation MAMS number.
A switching station or distribution substation that is dedicated to the connection of a
generator shall have the relevant suffix from the table below to indicate the type of
generation.
Generation
Biomass & energy crops (not CHP), Landfill*
gas, sewage gas, biogas (not CHP)
Hydro
Large CHP (>=50MW)
Medium CHP (>=5MW, <50MW)
Mini CHP (<1MW)
Offshore wind
Onshore wind
Other generation
Photovoltaic
Small CHP (>=1MW, <5MW)
Tidal stream & wave power
Suffix
BIO GEN
Hydro
CHP
CHP
CHP
OSWF
WF
GEN
PV
CHP
Tidal
12/3/15
*Landfill not required if already in substation name
5.
GSP, BSP AND PRIMARY SUBSTATIONS, AND ASSOCIATED NETWORKS
(132kV & 33kV)
The Table in Appendix A and drawings in Appendices B, C, D & E are associated with
this section.
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5.1
132/33kV Open Type Switchgear
In the case of open type 132/33kV switchgear the principles of CEGB Operation
Memorandum No. 5, a copy of which is available in the electronic library, shall generally
be followed. In this system each item of switchgear is allocated a code which must be
displayed at the equipment and at each operating handle or control switch. Examples
are described in the Table in Appendix A and are shown schematically in Appendices B
& C.
5.2
132kV Open Type Busbars
132kV busbar numbering and nomenclature shall be based on CEGB Operation
Memorandum No 5 and shall include the following:
5.2.1
Nominal busbar voltage eg 132kV;
5.2.2
Busbar designation (Main Busbar, Reserve Busbar, etc.);
5.2.3
Busbar section number (1, 2, 3, etc.), eg 132 kV Main Busbar 2;
5.2.4
Sections of busbars of the same nominal voltage and busbar designation shall be
numbered consecutively from one end of the substation to the other. Main and reserve
busbars shall have corresponding numbering.
5.2.5
In the case of substations where one section of one busbar is common to two sections of
an associated busbar, the former shall bear the numbers of both corresponding sections
of the latter, eg:
132kV Main Busbar 1;
132kV Main Busbar 2;
132kV Reserve Busbar 1/2.
5.2.6
The busbar section number shall be omitted in those cases where the busbar is a single
busbar having no sectioning facilities, eg 132 kV Main Busbar.
5.2.7
In the case of a closed mesh type substation the corners of the mesh shall be numbered
consecutively, anti-clockwise when viewed from above.
5.3
132kV Indoor Gas Insulated Switchgear (GIS)
5.3.1
The numbering convention for 132kV indoor gas insulated switchgear shall be based on
CEGB Operation Memorandum No 5 and is shown in Appendix D.
5.3.2
A combined three-position disconnector and earthing switch shall be denoted by the
suffix “ED”.
5.4
33/11/6.6kV Metalclad Busbar Designation
5.4.1
The 33kV busbar shall be taken as the reference point and sections of busbars lettered
in order from left to right when facing the front of the switchgear. Provision shall be made
in the lettering, for a further section to the left, only when this is a firm future requirement.
5.4.2
Bus-couplers shall be designated by the busbar identification, eg ‘Bus-coupler A’
5.4.3
Bus-sections shall be designated by the two busbars connected eg ‘Bus-section A-B’.
5.4.4
Busbar interconnectors shall be designated by the two busbars interconnected e.g.
‘Interconnector A-B’ and are defined as a connection other than by busbar.
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5.4.5
Double busbars shall be designated ‘Main’ and ‘Reserve’ these terms being added
where appropriate to the names of bus sections or interconnectors.
5.5
Transformer Designation
5.5.1
Transformer identification shall be by number using ‘GT1’, ‘GT2’ etc for transformers
from 132kV to a lower voltage, ‘T11’, ‘T12’ etc for transformers from 33kV to a lower
voltage and ‘Network T1’, ‘T11 Auxiliary’ etc. for transformers supplying 400/230V in
primary substations.
5.5.2
Linking transformers, between 11kV and 6.6kV in the HV network, shall be numbered
T21, T22 etc.
5.5.3
The number selected shall as far as possible reflect the section of busbar to which the
transformer is connected, ie:
GT1 on Section 1 or T11 on Section A;
GT2 on Section 2 or T12 on Section B;
GT3 on Section 3 or T13 on Section C.
5.5.4
Where it is not possible to apply the principles described in 5.5.3 then every effort shall
be made to make the lower voltage side conform.
5.5.5
Where an additional transformer is connected to a section of busbar it is preferred that an
odd-numbered transformer is connected to Section 1/A or Section 3/C busbars and an
even-numbered transformer to Section 2/B or Section 4/D busbars etc.
5.5.6
Equipment directly associated with a transformer shall be given the transformer
designation eg:
T11 auxiliary transformer
T11 Auxiliary;
T11 fault throwing switch
T11 Fault Thrower;
GT1 neutral resistor
GT1 NER.
5.5.7
Transformer cables shall not be crossed solely to maintain switchgear layouts. To avoid
crossing cables it is preferable to maintain standard busbar nomenclature with nonstandard transformer designations.
5.6
Feeder Transformers
5.6.1
At the feeding end (or higher voltage end) the designation shall be by the remote
substation name and the transformer designation.
5.6.2
For a teed circuit, the designation at the feeding end shall be the remote substation
names, each, where applicable with its transformer designation, separated by ‘/’. Where
both downstream sites have feeder transformers the transformers shall, where practical,
have the same number.
5.6.3
At the transformer end, the transformer number and designation only are required (even
if the circuit is teed).
5.6.4
The preference for selection of transformer numbers is described in sub-sections 5.5.3 to
5.5.7.
5.6.5
The use of circuit numbers in addition to names is permitted, as in the former Manchester
Area, B567 etc,. The circuit number shall precede the name.
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5.7
Two-ended Circuits
5.7.1
A simple circuit shall be designated by the name of the remote substation. Where
parallel circuits exist, they shall be distinguished by “No 1”, “No 2” etc added to the name,
preferably following the rules for transformer number selection at the receiving end, ie
circuit No 1 connected to Main Busbar 1 or Section A busbars, circuit No 2 connected to
Main Busbar 2 or Section B busbars etc, where separate busbars exist.
5.7.2
The use of circuit numbers in addition to names, as in the former Manchester Area, B567
etc, is permitted. The circuit number shall precede the name.
5.8
Teed Circuits
Teed circuits shall be labelled to identify the remote ends. Therefore for a three-ended
circuit with substations A, B and C the labelling will be as follows:
At end A
B/C;
At end B
A/C;
At end C
A/B.
Substations shall be in alphabetic order.
5.9
12/3/15
Spare Units
Spare switch units shall be uniquely numbered within each substation and detail their
designation, eg Spare No 1 to capped end.
5.10
Single Panel Switchboards and Busbar Cable-boxes
5.10.1
A single panel switchboard shall be labelled with the name of the substation or
equipment connected to the cable box of the switch unit .
5.10.2
If the single panel switchboard includes an incoming earth switch then the switch shall be
designated by the name of the feeding substation followed by a suffix ‘Earth Switch’ or
‘ES’. If a teed configuration exists the designation shall be as described in sub-sections
5.6 and 5.8 followed by the suffix ‘Earth Switch’ or ‘ES’.
5.10.3
A busbar cable box shall be designated by and labelled with the name of the remote
substation or equipment connected to it.
5.11
Series Reactors
A reactor connected as a busbar interconnector shall be labelled ‘Reactor A-B’ etc.
Where a reactor is connected in series with a feeder or transformer the associated
switchgear shall be labelled with the feeder or the transformer designation, the reactor
itself being labelled ‘Reactor’ with the feeder or transformer designation added.
5.12
Relay/Control Panels
Relay/Control panels shall be in the same order and preferably the same orientation as
the associated switchgear.
5.13
Outgoing Circuit Names
The rules for the selection of outgoing circuit names for 11/6.6kV circuits shall be in
accordance with Section 6.
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6.
DISTRIBUTION SUBSTATIONS AND ASSOCIATED NETWORK (11kV, 6.6kV
& LV)
Drawings in Appendices F & G are associated with this section.
6.1
Transformer Designation
6.1.1
The 11/6.6kV switch controlling a local network transformer shall be labelled ‘T1’, ‘T2’
etc. If the 11/6.6kV switch controls a consumer’s transformer it shall be labelled
‘Consumer T1’, ‘Consumer T2’ etc.
6.1.2
Where a transformer is feeding the network and a consumer it shall be labelled as a
network transformer as described in clause 6.1.1.
6.1.3
Each transformer on a single site shall have a unique number, eg where a substation
contains a network and consumer transformer they shall be uniquely identified, eg:
Network T1;
Consumer T2.
6.2
Feeder Transformers
6.2.1
At the feeding end (or higher voltage end) the designation shall be by the remote
substation name and the transformer number. For a teed circuit, the designation at the
feeding end shall be the remote substation names, with, where applicable, the
transformer designation, separated by ‘/’. (See Appendix F.)
6.2.2
At the transformer end, the transformer number and designation only are required i.e. if
the transformer feeds the network then it shall be labelled ‘Network T1’, or if the
transformer feeds a consumer it shall be labelled ‘Consumer T1’.
6.2.3
If the transformer is connected locally to switchgear that includes an incoming earth
switch then the switch shall be designated by the name of the feeding substation
followed by the suffix ‘Earth Switch’ or ‘ES’. For a teed circuit, the designation shall be as
described in sub-section 6.1.1, followed by the suffix ‘Earth Switch’ or ‘ES’.
6.3
HV Circuits
6.3.1
A simple circuit shall be designated by the name of the remote substation. Where
parallel circuits exist, they shall be distinguished by “No 1”, “No 2” etc added to the name,
preferably following the rules for transformer number selection at the end nearest to the
source, eg feeder No 1 connected to Section A busbars, feeder No 2 connected to
Section B busbars, where separate busbars exist.
6.3.2
The use of circuit numbers in addition to names, as in the former Manchester Area,
F1234, L789 etc, is permitted. The circuit number shall precede the name.
6.4
Teed Circuits
Teed circuits shall be labelled to identify the remote ends. Therefore for a four ended
circuit with substations A, B, C and D the labelling will be as follows:
CP615.doc
At end A
B/C/D;
At end B
A/C/D;
At end C
A/B/D;
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At end D
A/B/C.
Substations shall be in alphabetic order.
6.5
12/3/15
Spare Units
Spare switch units shall be uniquely numbered within each substation and detail their
designation e.g. Spare No 1 to capped end.
6.6
Busbar Cable Boxes
A busbar cable box shall be designated by and labelled with the name of the remote
substation or equipment connected to it.
6.7
Multi-Switchgear Sites
6.7.1
On sites containing more than one non-extensible ring main unit or switchboard each unit
or switchboard shall carry the substation name and be lettered in order from left to right
when facing the front of the switchgear e.g. Unit A, Unit B. This is shown
diagrammatically in Appendix G.
6.7.2
The number selected for any local transformer shall reflect the unit to which the
transformer is connected, ie:
Network T1 on Unit A;
Network T2 on Unit B;
Network T3 on Unit C.
6.7.3
Where additional transformer(s) are connected the principles of section 5.7 shall be
followed.
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6.7.4
Switchgear interconnectors shall be designated by the unit they are connected to, ie:
At Unit A
‘Interconnector A - B’;
At Unit B
‘Interconnector B - A’;
‘Interconnector B - C’;
‘Interconnector C - B’.
At Unit C
6.8
LV Distributor Ways
6.8.1
All 400/230V distributors, terminated at substation fuseboards, feeder pillars, including
street pillars, and fuse-cabinets, shall be labelled with the following details:
a)
way number (minimum character height 10mm);
b)
circuit size, eg 3c 185 XC, 4w 0.1;
c)
fuse rating (as determined from CP331); and
d)
description, as sub-section 6.8.2 or 6.8.3, as appropriate.
minimum
character
height 6mm
Ways shall be numbered 1, 2, 3, etc. from left to right. The numbering shall include
incoming transformer units (Where a transformer unit is mounted above the outgoing
fuseways, it shall be way number 1.), any bus section ways and any separate way
provided for the connection of a mobile generating set.
Where a short length with increased conductor section is used immediately from a
substation (and no significant amount of load is connected to it along its length), the
circuit size shall be taken as that of the principal cross-section of the distributor. In
accordance with CP331, sub-section 2.6, this is the size to be used in determining the
fuse rating.
6.8.2
Interconnected Distributor
An interconnected distributor shall be designated by the main route of the distributor (ie
road name etc) and equipment at the point of interconnection, eg link box, feeder pillar or
substation. (See Appendix H.) Where an equipment identification number is used, this
number shall be included in the description.
6.8.3
Radial Distributor
A radial distributor shall be designated by the route that the distributor takes and shall
indicate, eg where practicable the side of the road the feeder takes - “Globe St (Odd
Numbers)” - and, where appropriate, specific customer exit points - “Supermarket, East
Mall, via Ground Floor”.
6.8.4
Spare Ways
Spare ways shall be clearly identified within each substation and include detail of their
designation, eg Spare No.1 - Caution - Shorted capped end. (See EPD283, sub-section
4.2.2.)
6.8.5
Link Boxes and Street Pillars
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8/12/10
6.8.5.1 Each link box and free standing pillar (ie a pillar not comprising part of a substation) shall
be given a unique number. Each link box number shall be indelibly and clearly marked
on the bell-cover and each feeder pillar number on the inside and outside of the door. In
addition, each newly installed link-box shall have its number indelibly and clearly marked
on the fixed surround of the link-box, such that it may be easily read, with the bell-cover
in position. This is particularly important, where link-boxes are in close proximity.
8/12/10
6.8.5.2 Each circuit of a link box shall be designated by a letter - A, B, C etc in a clockwise
direction (when viewed from the top of the link box). Each circuit shall be lettered on the
bell cover. The bell cover shall also be marked with (an) arrow(s) pointing to the kerb(s),
or with a yellow triangle which corresponds to a yellow triangle on the side of the
chamber.
6.8.5.3 Way labels may also be marked with the way letters.
6.8.5.4 Examples of marking for different street arrangements is shown in Figure 1 below.
Footpath
A
B
X3271
D
C
Footpath
A
Carriageway
D
Carriageway
X3272
B
C
Footpath
Footpath
Carriageway
Carriageway
A B
X3273
D C
Footpath
Carriageway
Carriageway
Figure 1 Examples of Link-box Markings
7.
POLE-MOUNTED EQUIPMENT
The drawing in Appendix G is associated with this section.
7.1
General
Although this section applies primarily to 11/6.6kV equipment the general principles shall
also be applied to 33kV equipment.
7.1.1
Circuits feeding overhead lines shall be designated as follows
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7.1.1.1 Where the overhead line goes to a ground mounted substation this shall be used to
identify the circuit, whether or not there are any PMTs connected to the line.
7.1.1.2 Where the overhead line does not go to a ground mounted substation the first pole
mounted transformer on the line shall be used to identify the circuit.
7.1.1.3 Where the first pole mounted transformer is at or beyond the position of the first spur the
overhead line shall be identified as a teed circuit, eg, where A is the first PMT on the
main line and B is the first PMT on the spur line, the circuit would be identified as:
A/B.
7.1.2
Where pole mounted switchgear is situated close to a substation it shall be named with
the name of the substation, followed by the switchgear type.
7.1.3
All pole mounted equipment situated in one locality shall carry the same name and a
suffix to identify the equipment type. The name should not be easily confused with other
names on the system and should preferably assist in the location and identification of the
equipment.
7.1.4
If more than one unit of the same switchgear is situated in the same locality then a suffix
number shall be added.
7.1.5
Where equipment identification numbers are used in addition to the name this system
can be continued in addition to the above standard.
7.1.6
Pole mounted equipment shall be identified by a suitable label, in accordance with
ES400N1, fixed to the pole.
7.2
Pole Mounted Transformer
A transformer name shall include the suffix ‘Transformer’ or ‘PMT’, eg Home Farm PMT.
7.3
Switchgear
Types of pole-mounted switchgear shall be identified by the use of the appropriate
abbreviations listed in Section 8.
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8.
CIRCUIT LABELLING
8.1
Circuit labels shall state in full the circuit name.
sufficient to enable the label to be clearly legible.
The size of the lettering shall be
The only permissible abbreviations are:
For
equipment
descriptions:
Air Break Switch
Auto Recloser
Auto Sectionalising Links
Auxiliary
Bottle End
Bulk Supply Point
Capped End
Earthing Disconnector
Earth Switch
Feeder Pillar
Fuses
Gas Auto Recloser
ABS
AR
ASL
Aux
BE
BSP
CE
ED
ES
FP
F
GAR
Gas Sectionaliser
Gas
Vacuum
Recloser
Grid Supply Point
kilovolt
Links
Link Box
Overhead
Pole-Mounted
Transformer
Sectionaliser
Substation
Switching Station
For
descriptions:
Avenue
Buildings
Close
Cottage
Cottages
Court
Crescent
Drive
East
Estate
Farm
Garden(s)
Generator
Green
Headquarters
Higher
Hospital
House
Industrial
Ave
Bldg
Cl
Cott
Cotts
Ct
Cres
Dr
E
Est
Fm
Gdn(s)
Gen
Grn
HQ
Hr
Hosp
Hs
Ind
Landlord
Lane
Lower
North
Number(s)
Park
Place
Reservoir
Road
Saint
South
Square
Street
Station
Terrace
Village
Walk
West
GSect
Auto GVR
GSP
kV
L
LB
O/H
PMT
Sect
S/S
Sw Stn
locational
L/Lord
Ln
Lr
N
No(s)
Pk
Pl
Res
Rd
St
S
Sq
St
Stn
Terr
Vill
Wa
W
8.2
The circuit designations in MAMS etc. shall be character for character the same as the
circuit designation. In situations where the number of characters available in MAMS is
exceeded the circuit name can be abbreviated but shall still reflect the circuit name.
8.3
Circuit labels shall be attached to the plant prior to the commissioning of the circuits.
8.4
The labels shall generally be in accordance with ES356 and ES400N1, shall be easily
legible, durable and securely fixed to the equipment. Self-adhesive labels, such as
“Dymo” tape, shall not be used in place of permanent labels.
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8.5
Where there is a passageway or working space at the rear of extensible switchgear,
labels shall be fitted on the rear as well as on the front of the equipment.
8.6
Similarly, where rear access to a ring-main unit is required for cable jointing or circuit
testing, labels shall be fitted on the rear as well as on the front of the equipment. Where
the manufacturer provides a facility for additional circuit labels, eg on cable boxes, this
shall be used.
8.7
Where a circuit number is used in addition to the circuit name the name shall follow the
number.
8.8
In the case of 400/230 V equipment, and where standard sized labels cannot be used, it
is acceptable to use non-standard sizes. Minimum character sizes shall be as shown in
6.8.1.
9.
DOCUMENTS REFERENCED
CEGB Operation Memorandum No.5
ES356
- Notices & Nameplates
ES400N1
- Notices & Nameplates – Overhead Lines
CP331
- Protection of LV Underground and Overhead Distributors and HV
Protection of Distribution Transformers
- Network Diagrams
CP625
10.
KEYWORDS
Name; Designation; Transformer; Feeder; Substation; Circuit; Plant; Distributor
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Page 13 of 12
APPENDIX A
*00
*01
*02
*03
*04
*05
*06
*07
*10
*11
*12
*13
*14
*15
*16
*20
*21
*24
*25
*26
*28
*60
*61
*66
*69
Bus
Coupler
Bus Coupler Circuit Breaker
Bus Coupler Earthing Switch
Bus Coupler Main Busbar Disconnector
Bus Coupler Reserve Busbar Disconnector
*30
*31
*34
*36
*W0
*W1
*W4
*W6
Static Series
Compensator or
Series Reactor
Class
Reactor Circuit Breaker
Reactor Earthing Switch
Main Busbar Selector Disconnector (1st Choice)
2nd Reactor Circuit Breaker where 2 per Reactor
Reserve Busbar Selector Disconnector (1st Choice)
Circuit Breaker Disconnector (Busbar side)
Main Busbar Selector Disconnector (2nd Choice)
Reactor Tie Busbar Disconnector or Reserve Busbar Selector Disconnector (2nd
Choice)
*40
*41
*44
*45
*46
*47
*48
*49
*R0
*R1
*R4
*R5
*R6
*R7
*R8
*R9
Reactor/Capacitor Circuit Breaker
Reactor/Capacitor Earthing Switch
Reactor/Capacitor Disconnector
Reactor/Capacitor Switch Disconnector
*50
*51
*53
*55
*K0
*K1
*K3
*K5
Reserve
Bus Section
Main Bus
Section
Transformer
High Voltage
Side
Lines
Switch Disconnector
Line Earthing Switch
By-Pass Disconnector
Line Disconnector
Main Busbar Selector Disconnector
Circuit Breaker
Reserve Busbar Selector Disconnector
Circuit Breaker Disconnector (Busbar Side)
Transformer Circuit Breaker
Transformer Earthing Switch
Transformer By-Pass Disconnector
Transformer Disconnector
Main Busbar Selector Disconnector
Switch Disconnector
Reserve Busbar Selector Disconnector
Main Bus Section Circuit Breaker
Main Bus Section Earthing Switch
Main Bus Section Disconnector (No. 1 side)
Switching Disconnector.
Mesh Opening Corner Disconnector
Main Bus Section Disconnector (No. 2 side)
Reserve Bus Section Circuit Breaker
Reserve Bus Section Earthing Switch
Reserve Bus Section Disconnector (No. 1 side)
Reserve Bus Section Disconnector (No. 2 side)
33/25
kV
*L0
*L1
*L2
*L3
*L4
*L5
*L6
*L7
*H0
*H1
*H2
*H3
*H4
*H5
*H6
*S0
*S1
*S4
*S5
*S6
*S8
*P0
*P1
*P6
*P9
Static Shunt
Compensator
Open Type Switchgear Numbering & Nomenclature (excluding Metalclad)
Title
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132kV
Page A1 of 2
*80
*81
*83
*84
*85
*86
Generator Circuit Breaker (where 2 per generator, main busbar)
Generator Transformer Earthing Switch
By-Pass Disconnector
Generator Transformer Disconnector
Main Busbar Selector Disconnector
Generator Circuit Breaker where 2 per generator (reserve Busbar) or Switch
Disconnector
Reserve Busbar Selector Disconnector
Circuit Breaker Disconnector (Busbar Side)
*90
*91
*92
*93
*94
*95
*96
*97
Generators
Transformer Low Voltage Side
Transformer Circuit Breaker
Transformer Earthing Switch
Transformer Disconnector
Main Busbar Selector Disconnector
Switch Disconnector
Busbar Selector Disconnector
*T6
*M0
*MI
*M2
*M3
*M4
*M5
*M6
*M7
* Denotes a sequence number.
+ This is a departure from CEGB Operation Memorandum No.5
See appendices B, C & D for illustrations of both numbering & nomenclature.
For further information see CEGB Operation Memorandum No.5.
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Page A2 of 2
APPENDIX B
CP615.doc
Whitepool
Grid Supply Point
SGT 1
SGT 2
181
281
183
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(GSP)
283
121B
121A
180
221B
221A
280
132kV Main Busbar 1
132kV Main Busbar 2
104
184
114
186
116
124
120
128
234
284
214
204
286
216
206
230
106
236
160
132kV Reserve
Busbar 1
169
166
161A
105
161B
110
132kV Reserve
Busbar 2
261B
261A
103
205
210
113
213
111
203
211
201
101
GT1
GT2
101
Page B1 of 1
Pendale
132kV
Substation
1T1
103
105
2T3
* GT1
* GT2
2T4
Section A
104
106
101
113
1T4
132kV Main
Busbar 1
132kV
Reserve
Busbar 1
2T1
1T3
1S4
1S0
111
Section B
GT1
1S8
* GT1
* This is a departure
from CEGB Op Memo 5.
Figure 1 Examples of Switchgear Designations - Open-Type 132kV Switchgear
APPENDIX C
132kV Main
Busbar 2
204
206
132kV Reserve
Busbar 2
205
Bredbury
GSP
203
201
Hazel Grove
Bredbury
101
113
Hazel Grove
BSP
111
GT1
GT1 Earthing Transformer
GT1
Indoor (Metalclad)
33kV Switchboard
33kV
Figure 2 Examples of Switchgear Designations 132/33kV Transformer-Feeder
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APPENDIX D
CP615.doc
132kV Main Busbar 1
132kV Main Busbar 2
120
124
104
114
128
184
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131A
121B
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204
214
206
216
284
221A
221B
130
131B
106
116
186
132kV Reserve
Busbar 1
166
161B
161A
101B
103
101A
261
111B
113
111A
281B
201B
181B
203
183
181A
280
210
205
Metal Switchgear
Casing
281C
211C
201C
180
110
105
132kV
Reserve
Busbar 2
181C
111C
101C
169
286
211B
213
201A
281A
211A
Feeder No. 2
Feeder No. 1
Page D1 of 1
GT1
SGT 1
Grid Supply Point (GSP)
Figure 3 Examples of Switchgear Designations - 132kV GIS
GT2
SGT2
APPENDIX E
132kV
GT1
4.2
A
ustin
BSP
Bus-Section
GT1 Earthing
Transformer
GT1 NER
GT1
Section A
GT2
GT2 Earthing
Transformer
GT2 NER
GT2
Section B
A-B
33kV
33kV
Commer
No1
Bedford
T11
T12
T14
Enfield
T11
Commer
No2
T14
T11
T12
No 1
No 2
4.1
A
ustin
BSP
T11
Bus-Section
A-B
Section A
T12
Section B
11kV
Network
T1
T14
T1
T11 Fault
Thrower
5.
Austin
BSP
Austin BSP
No 1
Commer/
Daimler
T11
Austin BSP
No 2
Bedford
Commer
Bedford/
Daimler
F
T11
Daimler
Enfield
Bedford/
Commer
Figure 4 Examples of Circuit Designation - 33kV Network
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Page E1 of 2
132kV
GT1
Section A
GT1
Ford BSP
GT2
Bus Section
A-B
GT2
Section B
33kV
33kV
Triumph/
Vauxhall
Royce T12/
Norton T12
Morris/
Leyland T11/
Norton T11
T 11
Ford
BSP/
Vauxhall
T 11
Leyland
11kV
T 11
Triumph
T 12
T 11
33kV
T 12
11kV
Norton
Ford BSP/
Leyland T11/
Norton T11
Morris
T 12
Ford BSP/
Triumph
T 12
33kV
11kV
Royce
Vauxhall
33kV
Figure 5 Examples of Circuit Designation - 33kV Teed Circuits
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CP615
Page E2 of 2
APPENDIX F
33kV
T12
T11
Nuttall (Primary)
Bus-Section
A-B
T11
4.
11kV
Close
Ave
T1
S
e
c
ti
o
n
A
T12
Section B
Wilson
St No1
T1
Nuttall
Primary
No1
Wilson
St No2
11kV
Butcher
Rd
Giles
Rd
Nuttall
Primary
No2
Wilson St
Nuttall
Primary
11kV
Nuttall
Primary
Close Ave
T1
B
u
t
c
h
T1
e
r
Mill St/
New Rd T1/
Oaks Rd
Hope
St T21
T1
3.
Giles Rd
John St
Nuttall
Primary
Rd
T1
T1
T21
New Rd
T1
Close Ave
John St
Consumer
T1
Giles Rd
G
T21
6.6kV
Hope St
M
Mill St/
New Rd T1/
Butcher Rd
T1
Ash Rd
2.
Butcher Rd/
Oaks Rd/
New Rd T1
V
O
a
k
s
1.
M
i
l
l
Smith Ave
T1
T1St
Rd
to Ash Rd
to Smith
Ave
Figure 6 Examples of Circuit Designation - HV Network
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F1
of
1
APPENDIX G
to Jones Paper Mill
T2
James St S/S
T1
M
James St B
James St A
Consumer T2
Network T1
Interconnector
B-A
Interconnector
A-B
Walker St
Benson Rd
to
Benson Rd
to
Walker St
Figure 7 Example of 11kV Multi-Switchgear Site
to
Round St.
Round St.
Robson Lane
Sw Stn
Hillside Farm PMT/
Home Farm PMT
Robson Lane
GVR
Located in close
proximity to Robson
Lane Switching Station
Robson Lane
ABS
100
Home Farm
PMT
25
Hillside Farm
PMT
Row Lane
SECT
Figure 8 Example of 11kV Pole Mounted Equipment
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Page G1 of 1
APPENDIX H
CP615.doc
John St.
Fred St.
Way 5
Way 4
Way 3
As subsection
6.8.3
Way 2
Way 1
Way 5
Way 4
Way 3
Way 2
Way 1
1
4c 0.3
OPEN
High St to
John St. S/S
As subsection
6.8.3
4
3c 185 XC
400A
John St. South /
LB X3270
Charles St
1
X3270
4c 185 SAC
315A
Ascot St./
LB X3270
Charles St
Page H1 of 1
As subsection
6.8.3
Figure 9 Examples of LV Interconnector Labelling
Way 5
Way 4
Way 3
Note: This diagram is
for explanatory
purposes only and does
not comply with CP625.
Port St.
Way 2
Charles St.
Link Box
Way 1
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5
4c 0.3
400A
John St North
to Fred St. S/S