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CIM Issues #5304

Clarify description on TransformerEnd attributes

Added by Pat Brown about 2 years ago. Updated 6 months ago.

Status:
Closed
Priority:
Normal
Author/Contact Info:
Tom McDermott, Chuck Dubose
Base Release:
Solution to be Applied To:
CIM18v03
Solution Version:
CIM18v03
Solution Applied By:
Chavdar Ivanov
Completion Date:
02/11/2023
CIM Keywords:
61970-Wires
Breaking Change:
No
Breaking Change Description:
CIM Impacted Groups:
WG13
Requestor:
Pat Brown
Standard(s):

61970-301, 61970-452, 61968-13

Version:
Clause:
Sub-Clause:
Paragraph:
Table:
Originally Closed in Version:
Origination Date:
Origination ID:
Originally Assigned To:

Description

The use and meaning of the TransformerEnd.grounded, .rground and .xground attributes is not clear.

Proposed Solution

Clarify the meaning and use of the 3 TransformerEnd attributes.
Summary:

.grounded should be true if grounded, whether solidy or not
.rground and .xground are required if .grounded is TRUE and not to be present if .grounded is FALSE

Decision

452 constraint C:452:SC:PowerTransformerEnd.grounded:grounding

Release Notes

The following changes are applied

- Changed the description of TransformerEnd.grounded to: Used only for Yn and Zn connections indicated by PowerTransformerEnd.connectionKind. If true, the neutral is grounded and attributes TransformerEnd.rground and TransformerEnd.xground are required. If false, the attributes TransformerEnd.rground and TransformerEnd.xground are not considered.
- Changed the description of TransformerEnd.rground to: Resistance part of neutral impedance. Zero indicates solidly grounded or grounded through a reactor.
- Changed the description of TransformerEnd.xground to: Reactance part of neutral impedance. Zero indicates solidly grounded or grounded through a reactor.

the template of 452 is updated - the 452 constraint C:452:SC:PowerTransformerEnd.grounded:grounding is deleted as the constraint is integrated in teh description. In the template of 452 there is an action item to update SHACL constraints.

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