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The IEC publishes a series of documents and rules governing the preparation of documents, drawings and the referencing of equipment. Jec on country and industry, people are either familiar with the IEC system or not. For those not familiar it can be a little confusing at first.
IEC Reference Designations
Ie when IEC document production is compared to other methods it is mistakenly assumed the difference is simply symbols. This is not the case. The IEC document and referencing system is a comprehensive approach covering symbols, drawing and layout techniques, equipment references, identification of terminals and signals, classification of documents and computer data organisation.
It jec goes beyond just documentation and extends into physical devices and implementation. I’ve introduced IEC systems to three companies.
In each case my initial attempts were meet with criticism, objections and the belief that it was unduly complicating life.
However, in all these cases and after a couple of projects everyone on the team was highly praising of the IEC method and were not willing to go back to their old system. In each ic implementation of IEC based methods resulting in simplification of documents drawingsbetter technical content on the documents, more consistency between documents and a reduction in the time to necessary produce the documents.
One of the areas of the IEC system which is sometimes confuses the first time people come across it is the formulation of reference designations. This note gives a brief overview and introduction to the reference designation system. The prefix is used to construct single level designations, which shall consist of the following:. The IEC system allows drawing elements and products to be specified in either the functional, product or location aspect or some combination of two or more aspects.
Still sounds a little confusing? Hopefully and example will make it easier to understand. The IEC is fairly open on how you apply reference designations for projects and organisations. Each project or organisation tends to be unique so this makes some sense. The approach is to ensure that the complete reference designation tag number for each item of equipment has a function part and a product part.
The location aspect is considered optional and only if required. For the function aspect, we use a variation of the principals 6166 out in IEC Alarm system, Clock system Lighting installation Electric power distribution Fire protection system Security system. Product aspect is in accordance with IECcode letters — see later in the note for a more detailed explanation.
Typical code letters include Q for circuit breakers, T for transformers, A 661666 assemblies switchboardsetc. There are specified in more detail in IEC for each type of device. Generally we number each product in a logical fashion which fits the project i. For switchboards Assemblies we treat slightly different as shown in the table below. This makes the reference designation more meaningful without over complicating the implementation.
This didn’t work to well, so basically we allocate the numbers logically depending on the project and arrangement of systems.
We leave the function aspect is freely definable. Generally we find we do not need to use location as this tends to be obvious from the context of the document or drawings. If we do need to use we would define logical set of locations for the project. IEC structuring is hierarchical in nature. This is further illustrated in the image. IEC “Industrial systems, installations and equipment and industrial products – Structuring principles and reference designations – Part 2: Classification of objects and codes for classes”.
IECpublished jointly by IEC and ISO defines classes and subclasses of objects based on a purpose- or task-related view of the objects, together with their associated letter codes to be used in reference designations.
The classification is applicable for objects in all technical areas, e. A letter codes enables classification of objects. The new letter codes, which are common to all technical branches, apply from IEC table 1.
The above is a very brief introduction to the IEC reference designation system. It is not an easy subject to cover briefly and is better understood by working with the system and seeing live examples. Steven has over twenty five years experience working on some of the largest construction projects.
BS EN 61666:1997, IEC 61666:1997
He has a deep technical understanding of electrical engineering and is keen to share this knowledge. As a large company we are looking at implementing the DCC code as a part of the referance designation system. Reviewing ic internet 16666 there does not appear to be very much ativity in this field.
Three years on from your article what is the industrial base using this standard? Clive, thanks for the comment. Given free choice I do implement it on the projects I am involved in — however, more often than not the client has their own numbering system we need to follow. I also run into issues with other disciplines not wanting to follow the system. A pity really as I do think the DCC is well thought out.
This industrial branch is typified by small and medium sized companies where access to standards and insight into its use and correct applications probably involves resources in excess of their budget.
In a competitive environment the reference designation with document classification should give a competitive edge where machines are to combined in process units and plants. Clive, Thanks for sharing your research.
Years ago I was told that you should always try to write the best report you can. Many years later I still think on this as one of the better pieces of This article gives an 616666 to IEEE method for the selection and calculation of battery 6166. The standard aims to consolidate AC and traction voltages within the industry and defines the following bands: From the earliest times, humans have found ways to create light.
Pre-historic peoples used natural materials moss, grass, etc.
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A UPS is an uninterruptible power supply. It is a device which maintains a continuous supply of electrical power, even in the event of failure of the I think it is much more interesting to live not knowing than to have answers that might be wrong I’ve recently come across this question a couple times browsing the internet.
Decided to give a quick answer here. A rectifier transformer is a transformer Our question and answer system while letting you do exactly what it says, is much more. It is a dynamic 61666 driven system, where our users not only ask Our IEE cable sizing was wrote a few years ago and had become rough around the edges. I thought it was time to give the tool a service.
If you have some expert knowledge or experience, why not consider sharing ief with our community. Steven McFadyen Steven has over twenty five years experience working on some of the largest construction projects. About the author myElectrical Engineering. View 4 Comments old system.
BS EN , IEC – Identification of terminals within a system
Comments are closed for this post: Write your best report Years ago I was told that you should always try to write the best report you can. Battery Sizing This article gives an introduction to IEEE method for the selection and calculation of battery capacity. Voltage Levels to IEC The standard aims to consolidate AC and traction voltages within the industry and defines the following bands: Lighting Design – An Introduction From the earliest times, humans have found ways to create light.
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16666 c myElectrical. The prefix is used to construct single level designations, which shall consist of the following: Computer networks Telephone system Video surveillance system Antenna System. Click here to view the notes indexed by tag.