1905   SI unit #70 is erroneous

Created: 15 Feb 2024

Status: Future Improvement

Part: Part 7-3 (2020; Edition 2.1)


Page: 90

Clause: 8.16

Paragraph: Table 112


The listed SI unit #70 "A²t" is erroneous.
"t" stands for "time", but here a unit is required.


Change "A²t" to "A²s" as "seconds" seems to be the appropriate time base.

Discussion Created Status
Approve 11 Jun 24 Future Improvement
There is no interoperability issue between, as with transmit over the wire ord, and ord=70 is commonly understood as "A²s".
There is also no interoperability issue between tools as soon as they follow 7-1 Annex K.2.15.

The tissue cannot be really addressed as an editorial tissue as it impacts the 7-3 code component.

Conclusion: agree to be addressed in a future version of 7-3 but not as tissue.

11 Jun 24 Approval (Future Improvement)
The litteral definition A²t, ord 70 exists since IEC 61850-7-3:2003.
Accroding to IEC 61850-7-1 Annex K.2.15 : Modification of an enumerated vales does not lead to compatibility issues.
Is such a litteral change to be handled as an interop tissue or should it postoponed to a future edition?

28 Feb 24 Triage
The quantity is I²t.
The unit is A²s.
16 Feb 24 Triage


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