-
Membership
Career development & professional registration-
Explore this section
Members and registered users
Enhance your career
Professional registration recognises your competence, commitment, skills and experience.
The IET provides guidance and support to enable members to undertake planned and structured Initial Professional Development (IPD) and Continuing Professional Development (CPD).
Professional development courses designed to help individuals and organisations reach and stay at the leading edge of engineering and technology.
The IET Awards reward and celebrate individual excellence, innovation and ambition (engineering scholarships).
-
-
Resources
Library, archives, bookshop, publications & factfiles-
Explore this section
E&T Jobs
Engineering & Technology Jobs
Search today for your next engineering role on Engineering & Technology Jobs, the job board hosted by the IET.
Standards
Code of Practice for Electrical Safety Management
Managing electrical safety effectively is vital in avoiding accidents, delays and unseen costs to your business. IET Standards' newest publication will help non-technical managers manage electrical safety in their organisations. The Code of Practice is now available to pre-order.
Publications
Open access
Open access publishing now available in all existing IET research and letters journals, plus our new fully open access online journal, The Journal of Engineering. Now accepting submissions.
E&T webinars
Free-to-attend, interactive webinars that enable you to stay abreast of the latest technology developments, whilst improving your knowledge across a host of engineering-related disciplines.
-
-
Get Involved
Communities, sectors, volunteers & discussion forums-
Explore this section
MyCommunity
Shape your community. Shape your world.
MyCommunity, the IET's professional network and collaboration platform, enabling you to connect, interact and exchange knowledge with your peers.
Volunteering
Interact with the IET and raise your professional profile
Volunteering can enhance your career development, is a personally rewarding experience and also benefits your Community.
-
-
Events
Conferences, seminars, courses, lectures & visits-
Explore this section
Highlighted events
14 June 2013 | IET London: Savoy Place
Call for papers deadline: 28 June 2013
19 September 2013 | Strand Palace Hotel, London, UK
Call for papers deadline: 18 October 2013
-
-
Policy & Media
Thought leadership, media centre & public affairs-
Explore this section
Media centre
IET corporate news and activities, plus comment and reaction on engineering and technology issues.
Read what the media is saying about the IET and our activities.
Catch up on the latest IET and engineering developments with our regular IET News video.
Share what’s on your mind through this series of interactive webcasts for members of the IET.
Policy
Key topics offer summaries of the IET’s positions on many of the most important policy topics.
The IET represents the views of its members on a wide range of professional and technological issues.
The IET serves the specialist requirements of the legal profession by nominating expert witnesses to present technical information in court.
Strengthening the debate between engineers, policy-makers and wider society on technology solutions for 21st Century global issues.
-
 |
IET |
 |
 |  |
|
search :
help :
home
|
||
|
Latest News:
|
|
|
|
Topic Title: Distribution Control System - Voltage Colours Topic Summary: Created On: 02 October 2007 11:53 AM Status: Post and Reply |
Linear : Threading : Single : Branch |
 Search Topic |
Topic Tools
|
 02 October 2007 11:53 AM
|
|
|
I have often been told there is a standard for voltage colours for a distribution control diagram. I expect it may have been a CEGB standard but the nearest I've got to it, is a Relevant Electrical Standards NGrid document. This gives the following as colour scheme to distinguish busbar voltage (kV):-
400 blue 275 red 132 black 66 brown 33 green 25 yellow 22 yellow 11 red 6.6 blue 6.25 blue 3.3 violet Does anyone know if a standard exists and where I can obtain a copy? I have spent a while searching the web etc. Regards John |
|
|
|
|
|
02 October 2007 04:17 PM
|
|
|
Your post rings some bells with me, but I will have to have a think about it.
Is this colour coding intended for use in transmission and distribution system mimic diagrams and the like, perchance? Regards, Ross Currie TMIET ------------------------- Ross Currie TMIET |
|
|
|
|
|
02 October 2007 04:32 PM
|
|
|
Knew I had seen something somewhere - it was just a case of remembering where I had seen it.
The following quote is from the Ministry of Defence JSP 375, Volume 3, Chapter 3 - SRP01:2005 - MoD Electricity Safety Rules & Procedures "Mimic Diagram: A single line diagram of an electrical distribution system so made that the symbol for each item of switchgear may be adjusted to indicate the ON, the OFF, or the EARTHED position. The symbol for each item of Equipment shall use the appropriate colour indication of voltages to BS 3939." The British Standard referred to above - BS 3939-1:1986 Graphical Symbols for Electrical Power, Telecommunications and Electronics Diagrams is now to the best of my knowledge and belief an obsolete standard but this may be the source of your voltage colour coding system. Regards, Ross Currie TMIET ------------------------- Ross Currie TMIET |
|
|
|
|
|
02 October 2007 07:53 PM
|
|
|
John,
I think your list of colours is correct. You will find though that some companys have a few local variations, for example we use blue for 3.3kV instead of violet, we also have a non-standard 90kV which we use orange for. Finally, LV (415v) is usually brown on the list. It was certainly an ESI standard for control room wall-diagrams, and transferred to the electronic form for scada display mimics. I cannot recall if the colours were in the BS, or just the symbols. Regards, Alan. |
|
|
|
|
|
04 October 2007 01:13 PM
|
|
|
Try IEC 60617 Graphical Symbols for Diagrams.
|
|
|
|
|
|
05 October 2007 03:02 PM
|
|
|
First thanks for the great response! I shall try get a look at BS 3939 & IEC 60617 from a library.
Regards John |
|
|
|
|
|
23 January 2013 10:32 AM
|
|
|
Anyone know the BS or IEC colour standard for 500kV voltage?
|
|
|
|
|
|
25 January 2013 10:32 PM
|
|
|
Hi Alan
Just out of interest, what voltages are used for distribution/supply in the IoM? Thanks. Clive ------------------------- Clive S Carver GCGI IEng MIET |
|
|
|
|
|
26 January 2013 01:37 AM
|
|
|
. . . Just out of interest, what voltages are used for distribution/supply in the IoM? In terms of transmission, we use 90kV for our cable to the UK, and 33kV for the transmission network on the island. For distribution, this is mostly 11kV, with a bit of legacy 3.3kV too. We sell to customers at 400/230v or 11kV. Regards, Alan. |
|
|
|
|
|
26 January 2013 08:57 AM
|
|
|
The cable to the UK is the longest subsea A/C cable in the world.
------------------------- David Hirst |
|
|
|
|
|
26 January 2013 10:27 AM
|
|
|
The cable to the UK is the longest subsea A/C cable in the world. Correct. A record that it has held for over 12 years now. Regards, Alan. |
|
|
|
|
|
26 January 2013 04:18 PM
|
|
|
Thanks for the info Alan.
90 kV seems an 'odd' voltage? I trust that it does not start off at 132 kV and experience a high volt-drop! 
Cheers! Clive ------------------------- Clive S Carver GCGI IEng MIET |
|
|
|
|
|
27 January 2013 12:34 AM
|
|
|
No, we have a pair of 132/90kV transformers at the UK end. There are two reasons for this, firstly it makes for easier connection of reactors to absorb the reactive power from the cable when necessary (they are connected to transformer tertiaries, and secondly, the 90kV is a balance between cable losses and insulation costs.
The ac link has advantages for us, as being synchonously connected to the UK grid (which has considerably more inertia than our little system), we inherit the UK's system stability, making island blackouts a very rare event compared to a few years ago. Regards, Alan. |
|
|
|
|
|
27 January 2013 05:06 PM
|
|
|
Thanks Alan for the info on the Isle of Man Interconnector.
I found a couple of interesting articles relating to this project:- http://www.gov.im/mea/projects/ and http://www.hvpd.co.uk/media/pd...DC-Paper-Mar-2006.pdf I have also taken the opportunity to edit the Wikipedia article to correct DC Voltage to AC Voltage in the "Technical Information" section. http://en.wikipedia.org/wiki/I...ngland_Interconnector Cheers! Clive ------------------------- Clive S Carver GCGI IEng MIET |
|
|
|
|
|
IET
» Energy
»
Distribution Control System - Voltage Colours
|
Topic Tools |
See Also:
|
|
| Technical discussion forums |
|
| · | Wiring and the regulations |
| · | Built environment |
| · | Design and production engineering |
| · | Control and automation |
| · | Communications engineering |
| · | Information technology |
| · | Energy |
| · | Transport engineering |
| · | Airfield engineering |
| · | Electronic engineering |
| · | Management in engineering |
| · | Consumer technology |
| · | Other and general engineering discussions |
| Professional and career discussion forums |
|
| · | Feedback and questions |
| · | CEng, IEng, EngTech and other professional registration matters |
| · | Savoy Place Virtual Club |
| · | Student and apprentice discussion forum |
| · | Young Professionals Community |
| Archived categories |
FuseTalk Standard Edition v3.2 - © 1999-2013 FuseTalk Inc. All rights reserved.
