CIM Issues #6322: New "Low Loss Potential" Quality Code needed in Part 9 - WG14 Part 9 Issues - UCAIug Issue Tracking System

CIM Issues #6322

New "Low Loss Potential" Quality Code needed in Part 9

Added by David Haynes over 1 year ago. Updated over 1 year ago.

Status:

New

Priority:

Normal

Author/Contact Info:

dhaynes@hubbell.com

Base Release:

Solution to be Applied To:

Solution Version:

Solution Applied By:

Completion Date:

CIM Keywords:

61968-Metering

Breaking Change:

Breaking Change Description:

CIM Impacted Groups:

WG14

Requestor:

David Haynes

Standard(s):

61968-9

Version:

Clause:

Annex D

Sub-Clause:

Paragraph:

Table:

Originally Closed in Version:

Origination Date:

Origination ID:

Originally Assigned To:

Description

It is possible for a meter to operate at very low voltage. It powers up and runs, but upon sensing its voltage, it knows that it is operating in a region outside its calibration zone. The event for this is often referred to as "Low Loss Potential" (in ANSI C12.19). Part 9 has an event to support this. However, it is possible for a fancy solid state meter to sit there, accumulate energy, know that it is outside of its calibration zone. Report the low loss potential event, but also then react to it by "compensating" for the low loss potential. If the meter has compensated for the error, we don't want an MDM to come along that sees the event and compensate a second time. A new quality code is needed to allow data to be marked up for this type of compensation.

Proposed Solution

Add new quality codes that would support the following usecases:

Reading is affected by an event that impairs its calibration such as the Low Loss Potential event (Add a new index to table D.5 to indicate a power quality issue: low voltage with loss potential.)
Reading has been compensated for Low Loss Potential event. (Need new QC category for "compensated.")
Reading is suspect because it has been a (very) long time since its last calibration OR the meter has never been calibrated. (Propose creating a new category for "calibration", and indexes to indicate that its date since the last calibration indicates the reading may be suspect.)

Related issues