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District Heating P — Cooling water systems Q — Auxiliary systems R — Gas generation and treatment S — Ancillary systems U - Structures W — Renewable energy plants X — Heavy machinery not main machine sets Z — Workshop and office equipment Equipment Unit Identification A — Mechanical equipment B — Mechanical equipment C — Direct measuring circuits D — Loop control circuits Identification Examples E — Binary and analog signal and variable conditioning F — Indirect measuring circuits Examples of Identification G — Electrical devices Identification Samples H — Subassemblies of main and heavy machinery Introduction Identification System is based on the Kraftwerk - Kennzeichen - System KKS This System is the basis for the standard and clear identification of all installations and subsystems in power plant.
The origin and development of KKS It is absolutely essential for the parties participating in the construction and operation of a power plant to agree upon a standard system for the designation and classification of the plant, its part and components. Due to the size of power plants and the fact that the large number of parties participating are all in different locations, communication problems arise which can incur costs which cannot be estimated in advance.
A standard designation system enables each party, irrespective of language and assignment, to identify uniformly and unambiguously, those parts of the plant within its responsibility. The planning, construction and operation of power plants was based in the past on attempts to identify installations and parts thereof by means of differing incompatible systems. The result was a series of operations whose sequence was often irrational.
Bearing in mind the scale of power plants being built up to the early sixties, the Plant Identification System AKS could be regarded as adequate for the needs of planning and construction engineers at that time. In the meantime, the AKS has been adopted as the main system of identification in a number of conventional and nuclear plants.
Increased unit sizes, higher rates of automation and further developments in power-plant technology, coupled with the demands made on classification systematics by power plant operators, all called for a uniform and total solution of the classification problem.
A working party, consisting of planners, operating companies, authorized inspectors and other authorities, was set up in with the task of finding such a solution. This draws clear divisions between power plant installations and systems, and takes full account of the needs of manufacturers, operators, inspectors and other authorities as well as the technical requirements of the mechanical engineering, process engineering, civil engineering, and electrical and control engineering sectors.
Format of Code I - 2. These types of code are distinguished by means of prefix and breakdown symbols. These three types of code use the same identification scheme, which is subdivided into four breakdown levels.
Originally the titles of the breakdown levels were based on the process-related code: Serial no. Serial no. The prefix symbols may be omitted if the information contents of the codes remain unambiguous. Format of Breakdown Levels The code is made up of breakdown levels. The individual breakdown levels are differently formatted. They are made up of classifying and numbering code elements. The latter consist of data characters occupied by alpha and numeric symbols.
The origin of the letters used in it is in German language, namely: G - Gesamtanlage: Total plant e. Read from left to right no data characters may be omitted. Special guidelines apply to data characters G, F0 and A3. Such modifications are subject to agreement between the parties to the project.
However, such schemes may not have the effect of reserving numbers in other applications, not even within the same engineering discipline. Contents of Data Characters I - 3. Total plant Serial no. The contents of this designation in KKS, is left for coordination for particular power plant. Data character F0 contains so called prefix number. It is one digit which identifies one from two or more identical subsystems in the overall plant. The prefix number is used in cases when for instance in compass of one power unit appear two or more identical subsystems two boiler plants, two turbosets, etc.
Adoption of a. Data character G as well as data character F0 can be omitted in KKS if the further part of designation will remain complete univocal. Process-Related Identification Process-related identification of systems and items of equipment according to their function in mechanical, civil, electrical and control and instrumentation engineering. System code System code consists of three letters and two digits.
No one of these symbols can be omitted.
IEC 61346 and KKS Technology Codes In TRACE MODE SCADA/HMI