ABB Relion 670 series Engineering Manual page 52

Section 4
Setting up a project
46
• A technical key is used on engineering drawings and for signal identifications.
The technical key is used within SCL for referencing other objects. Observe
that name is a relative identification within a hierarchy of objects. The
maximum number of characters allowed for a technical key is 25 for Edition 1
and 55 for Edition 2.
• A user-oriented textual designation is contained in the attribute desc.
Attributes cannot contain carriage return, line feed or tab characters. The
semantics of desc must also be relative within an object hierarchy.
PCM600 takes care of these two possibilities. The two possible signal designations
are available per object in the object properties for all hierarchical levels beginning
with the station as the highest level.
The technical key is automatically generated based on the rules and type
specifications of IEC 61346 and the extended definitions done for substations by a
technical committee. The technical key is shown in the Object Properties under
SCL Technical Key or Technical Key.
• The station level is predefined by "AA1", where 1 is the index.
• The voltage level is predefined by "J1", where 1 is the index.
• The bay level is predefined by "Q01", where 01 is the index.
• The IED is predefined by "A1", where 1 is the index.
The predefined full path name of the technical key for the IED would be
AA1J1Q01A1.
For all practical engineering purposes (both towards the IED and towards the
61850 engineering process), the user should keep the default SCL technical key.
However, it is possible, for example due to company naming policies, to rename
the SCL technical key for the station level, voltage level, bay level and IED level
using the Object properties window as shown in
• The station level has been renamed as "DMSTAT"
• The voltage level has been renamed as "C1"
• The bay level has been renamed as "Q1"
• The IED has been renamed as "SB1"
The renamed full path name of the technical key for the IED would be
DMSTATC1Q1SB1.
1MRK 511 398-UEN C
Figure 15.
670 series 2.2 IEC
Engineering manual