CHANGE REQUEST |
Request identity number: |
C00075 |
Applies to: |
S01414, S01415 |
Type of request: |
Technical modification |
Request status level: |
Resolved |
Proposal: |
To make a new symbol as a technical modification of S00019 (T-connection) telling about the direction of connections (conductores and/or cables) and without any junctions.
Comment by the Secretary:
Based on the original proposal to include a graphical symbol, based on S00019, graphically similar to the present S01414, a discussion has taken place with the originator and with persons in TC3/MT16.
The result of these discussions were that the proposed graphical symbol with the slanted line actually could mean three different things.
- no electrical connection
-- in a diagram with topographical layout: accesspoint to an physical bundle
-- in a diagram with functional layout: a simplification method used for "graphical bundling"
- with electrical connection: corresponding to a T-connection but with an indication of the direction where this connection physically takes place.
As a result, symbols S01414 and S01415 were prepared.
Note that the "symbol with the slanting line" actually changes meaning to some extent: The symbol has not been included in IEC 60617 before, but it has been used in IEC 61082-3 as a drawing method to indicate bundling. (This is also why this proposal is classified as "Technical modification" and not "Tecnically new".)
On the other hand the symbol with the slanted line is the one that actually most resembles an ordinary T-junction, and might therefore be better for indicating connection. Similarly, the curved line is in CAD- and drawing systems often used as a a feature for "graphical bundling".
The proposal has been held until the CD for IEC 61082-1 Ed. 2 was availbale. So, as the document 3/592/CD for IEC 61082-1 Ed.2. has now been sent for distribution, please refer to this document regarding (part of) the use of the symbol. A relevant basic question in that context is whether or not it should be possible to indicate the direction of connection by graphic means. The answer has impact on the question whether there is a need for two symbols, or if it is sufficient with one.
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Reason: |
The MT 16 (IEC 61082 revision) has found that this symbol is well used in examples in IEC 61082 but is not standardized in IEC 60617.
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Requested by: |
Karl-Anker Thorn
kt@ds.dk
DK |
General comments: |
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Comments at evaluation: |
Submitted for evaluation 2002-01-23. Closing for evaluation 2002-03-22.
AT(WGAS):The symbol with the "slanting line" is still in use in some CAD-circuit diagram-drawing- systems as T-connection indicating the direction of connection. It should be added to the database. The symbol with the curved line should also be added to the database to show, different to the slanting line, a graphical bundling.
DE(RESC): If the application class for both symbols will be limited to connection diagrams and installation diagrams only, we agree to the proposal, using the normal data base procedure.
FI(TAVI): I propose to use the extended procedure in order to get wider wievs.
DK(KATH): I agree with the DE-remarks (perhaps also circuit diagrams). To use normal data base procedure.
JP(HIKE): The extended procedure is proposed to get wider views.
NO(ES): The application class should include "circuit diagrams" in adition to the DE comments. Normal procedure.
Conclusion by the Secretary: Considering the different opinions on whether the symbols are suitable for use in circuit diagrams with the suggested meanings, the proposal will be continued in accordance with the extended procedure. A CDV will be circulated. |
Comments at validation: |
Document 3/599/CDV was circulated 2002-03-24.
The CDV was approved, see document 3/638/RVC and an FDIS will be circulated. The text of the symbols will be slightly modified in accordance with the RVC. |
Voting at validation: |
Comment by the Secretary 2002-09-29: Document 3/651/FDIS was sent to the IEC/CO for circulation.
The voting on the FDIS was closed 2003-01-17 with the result: Approved. See document 3/662/RVD, attached below. |
Requested on: |
2001-11-13 |
Evaluated on: |
2002-03-23 |
Resolved on: |
2003-01-24 |
Withdrawn on: |
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Evaluation closing on: |
2002-03-22 |
Validation closing on: |
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