TXP CLC Course
5
Introduction
The KKS, or Power Plant Classification System is used by Siemens
Westinghouse to identify equipment used for the Combustion Turbine. The use of
this system in conjunction with the Combustion Turbine will be described in a
general manner in this document. More detailed information about the KKS
system can be found in the official publications from Siemens Westinghouse.
KKS Identification
The KKS tagging system includes three types of identification:
• Process Identification
• Mounting Location Identification
• Room Identification
In the Combustion Turbine documentation, process Identification is identified by
the prefix "=" and identification of mounting location is identified by the prefix “+".
For I&C documents this can usually be found in the title block in the lower right-
hand corner of the drawing.
KKS Structure
KKS Levels
The KKS tagging system also provides a means to identify various levels of
devices within the power plant. These are broken down into four different levels:
• Level 0 Total Plant, i.e. Unit 11 or Unit 12
• Level 1 Function Key, i.e. Gas Turbine or Cooling Water
• Level 2 Equipment Code, i.e. Pumps or Actuators
• Level 3 Component or Signal, i.e. Relays or Switches
KKS Tag Numbering
The numbering used in the various levels of the KKS tagging system is assigned
when the design phase is being done. These numbers may be assigned to
represent a function or a particular piece of equipment.
Training Center
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