924   Missing curve characteristics

Created: 26 Sep 2012

Status: In Force (green)

Part: Part 7-3 (2010; Edition 2)

Links:

Page: 72

Clause:

Paragraph: setCharact Definition

Category: Issue for edition 2 of this part

Issue

From UML Model discussion / late German comments
It looks like "ANSI short time inverse" and "ANSI long time inverse" caracteristics are missing.

Proposal

Add them. Might it be that characteristic #8 "Long time inverse" should be "ANSI long time inverse?

Discussion Created Status
07 Jan 14 In Force (green)
This TISSUE will be applicable with Revision V2.1 (Namespace 2007B) 12 Dec 13 Ballot Period
Agreed to deprecate (not empty) the mentioned enums for revision 2.1. Add to the remaining ones the standard IEC 60255-151 (on which the characteristics are based). 11 Nov 13 Ballot Period
I would like to change back the state to red because there are still some questions open about different curves. Soon I come with a entry. 25 Oct 13 Discussion (red)
Cross-checking carefully the Curve Characteristics (CurveCharKind in UML notation)table regarding the suggested extension by two curves results in the following:
1) There exist only 6 inverse overcurrent curves (3 for ANSI/IEEE and 3 for IEC) plus the definite time curves (identical for ANSI and IEC). These curves are all given in IEC 60255-151 (2009-08).All other curves are only produced by a time multiplier i.e. the DO TmMult in PTOC. The time multiplier values are not standardized. Therefore, all other curves cannot be identified by a single number and have to be taken out of the table. Therefore, the list should look like as
1 / ANSI Extremely Inverse / IEC 60255-151 (2009-08)
2 / ANSI Very Inverse / IEC 60255-151 (2009-08)
3 / <empty> or Depreciated
4 / ANSI Moderately Inverse / IEC 60255-151 (2009-08)
5 / ANSI Definite Time / IEC 60255-151 (2009-08)
6 - 9 / <empty> or Depreciated
10 / IEC Very Inverse / IEC 60255-151 (2009-08)
11 / IEC Inverse / IEC 60255-151 (2009-08)
12 / IEC Extremely Inverse / IEC 60255-151 (2009-08)
13 - 14 / <empty> or Depreciated
15 / IEC Definite Time / IEC 60255-151 (2009-08)
16 / Reserved 		18 Oct 13 Ballot Period
it looks like ENUMS #8 should be an ANSI curves. Probably as well #6 and #7 (or are they both IEC and ANSI?). ANSI short time inverse may need to be added (could be added as #0 or using #16).

Need to clarify if we have more cvurves missing before we are proposing a solution 		19 Apr 13 Discussion (red)

 

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