The KKS system is a classification system for the complete power plant and its components and provides a common language for the designer. IDENTIFICATION SYSTEM KKS Chapter I KKS Guidelines and Total Plant Key Chapter II Function Key Chapter III Equipment Unit Key Chapter IV Component. I have a query which states: One of my client using KK standard codification for P&ID In KKS Codification of P&IDs, the line tag, instrument tag and valve tag.

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This applies analogously to supply systems.

KK standard codification

However, such schemes may not have the effect of reserving numbers in other applications, not codificstion within the same engineering discipline. They should be established individually for different control and instrumentation concepts.

Total plant Serial no. Spaced notation promotes the comprehensibility and mnemonic quality of codes. Regulation part is described in level 1 by process-related installation, and level 2 by the controlled parameter – control part is described by executive device e.

Feed water codificatoin Sealing fluid supply system for LB. A2 identifies control and instrumentation functions e. Installation Space Code Serial no.

The second character of FN numbers the cubicles. EY – Conditioning of signals related to functional protection group of technical and electrical protection system of the unit.

Identification in data character A2 is governed by the physical variable. Control and instrumentation equipment which serves more than one main group may be identified under main group C for control and instrumentation, e.

Closed-loop controls are identified according to the controlles variable and not after the measuring circuits which serves the control or the final control element on which the control codificatiom. H — Conventional heat generation Equipment Unit Code Equipment Unit Code consists of two letters, three digits and sometimes one additional letter data character A3 which can be omitted.


General Notes I – 5. A Grid and distribution systems B Power transmission and auxiliary power supply C Instrumentation and control systems D Instrumentation and control systems E Conventional fuel supply and residues disposal F Handling of nuclear equipment G Water supply and disposal H Conventional heat generation J Nuclear heat generation K Nuclear auxiliary systems L Steam, water, gas cycles M Main machine sets N Process energy supply for external users e.

Subgroups The classifying coding letters and designations are established on a non-project-specific basis in the KKS keys, namely as: Exceptions are junction boxes for coidfication machine sets and kks machinery, and junction boxes in electrical and control and instrumentation cubicles and cabinets; these are identified on breakdown level 1 according to the codificatioj main machine or heavy machine and cubicle or cabinet respectively.

KKS Identification System for Power Plants – Function and Type

On breakdown level 2, the individual windings are classified but not on a phase-specific basis by means of GT for transformer equipment and numbered starting on the high-voltage side.

B — Mechanical equipment Point of Installation Identification If necessary, further grouping can be performed by using FN. Where an equipment unit serves as an interface between two or more systems, its system code is assigned on the originator principle, i. Fictitious rooms in structures may be identified by numbering or coordinate systems. For example we can identify here: Numbering starts anew when one of the preceding code elements changes.

A breakdown level 2 is used to identify the installation space. Transducer Racks, Supports, Frames This auxiliary equipment is identified on breakdown level 1 using the code for the equipment location structure codewith the exception of auxiliaries for main machine sets and heavy machinery system code.


AK over a separate position code is to be established, e. G — Electrical devices The additional code is not an alternative code for the components identified under breakdown level 3. Help Center Find new research papers in: Conventional heat generation Unit control system L. Special Rules for Mechanical Engineering I – 5. Signals and Signal Applications Breakdown level 3 is used to identify signals and their applications. Such modifications are subject to agreement between the parties to the project.

S — Ancillary systems X — Heavy machinery not main machine sets The individual breakdown levels are differently formatted.

Usually the code is written above the line: Special Rules for Mechanical Engineering E — Binary and analog signal codificaion variable conditioning Mechanical Supports Supports may be codifjcation using the system code or the structure code.

System-related identification is expedient where the supported items are positively assignable to one system. A Grid and distribution systems B Power transmission and auxiliary power supply C Instrumentation and control equipment D Instrumentation and control equipment for use only when function codes CM to CT are insufficient for the identification of system combinations The subdivisions in F2 and F3, are given in the applicable Function Key.

Types coditication Code and Breakdown Levels It should be decided on a case- to-case basis which numbering convention is best suited to the extend and structure of the systems and plants to be identified.

Notation of Codes The code may be written with or without spacing but in such a way that it cannot be misinterpreted.