Update On IEEE-48 Standard [PDF]

Zitiervorschau

Update on IEEE-48 Standard and IEEE-1637 Guide for Spring 2012 ICC By Bill Taylor – 3M

Agenda • Background • Discuss IEEE-48 proposed revisions – IEEE Standard for Test Procedures and Requirements for Alternating-Current Cable Terminations Used on Shielded Cables having Laminated Insulation Rated 2.5 kV through 765 kV or Extruded Insulation Rated 2.5 kV through 500 kV • Discuss IEEE-1637 Guide to Select Terminations for Shielded Alternating Current Power Cable Rated 5 – 46 kV

Background • IEEE-48 was just revised in 2009. – The goal is to coordinate 404 and 48 so their test sequences and levels are the same and both could be tested with one set of samples

• IEEE-1637 was released in 2010. – It is released as a termination selection guide. The goal is to revise it and make it both an application and selection guide

• Both are discussion groups right now

IEEE-48 Proposed Revisions • We’ll briefly look at each section and discuss • Section 1 – Scope – Was discussed. Question has been raised if this standard should cover DC terminations and the answer is no • Section 2 – Normative References – Will review to make sure they are correct and all there

IEEE-48 Proposed Revisions • Section 3 – Definitions – Review and make sure all are covered • Section 4 – Service Conditions – Mike Smalley has made a presentation on this subject and this section will be reviewed and revised as agreed upon by the group. There are some issues in this area that need to be addressed. We will follow IEEE-404’s lead in this area

IEEE-48 Proposed Revisions • Section 5 – Rating – All sections including this one have same title as IEEE-404, but IEEE=404 has the test value tables in this section, but 48 has the test values in a different section. Look at coordinating so the standards are more consistent in layout as well as content. – Review and revise as agreed to by group

IEEE-48 Proposed Revisions • Section 6 – Product Markings – Section 6 in IEEE-404 is Construction and includes markings on joints as well as shielding requirements. IEEE-48 recommends more information than IEEE-404. Review and coordinate as much as possible with IEEE-404.

IEEE-48 Proposed Revisions • Section 7 – Test Requirements – Coordinate with IEEE-404 section 7 • Standard doesn’t specify what constitutes a family of terminations. Specifies that terminations be qualified on maximum conductor size. IEEE-404 released version requires qualification on minimum conductor size.

IEEE-48 Proposed Revisions • Proposed 404 standard defines a family of products and specifies that to qualify a family, the joints shall be tested on both minimum and maximum cables. Proposal is to adopt this for IEEE-48 as well.

IEEE-48 Proposed Revisions • Section 8 – Test Procedures – IEEE-404 combines testing and procedures into section 7, whereas IEEE-48 uses sections 7 & 8. Investigate if we can have the same format and sections for both.

IEEE-48 Proposed Revisions • Section 9 – Application Guide – This section will be completely removed from IEEE-48 and included in P-1637, which will become a selection and application guide and will be discussed next

IEEE-48 Proposed Revisions • Section 10 – Suggested Environmental Weathering Tests – Preliminary discussion is to make the UV tests a requirement and leave the other environmental test statements as they are

P-1637 Proposed Revisions • Title and Section 1, which is scope and purpose will be revised so the document will become both a selection guide and an application guide. • Sections 2 and 3, definitions and normative references will be reviewed.

P-1637 Proposed Revisions • There were suggestions of things to incorporate into the selection guide from the balloting process. • It was agreed that many of the suggestions would be incorporated into the guide, including the following:

P-1637 Proposed Revisions • Incorporate pictures of terminations into the guide – Bill Taylor will provide • Add an explanation to the guide on how stress control works – Bill Taylor • Add a section on where to use tubular versus skirted terminations (indoor vs outdoor) – Bill Taylor

P-1637 Proposed Revisions • Placement of fault indicators relative to terminations will be handled by referring to P1610 and P1216 • Termination lightning protection will be addressed by reference to P1299. • Selection of a termination based on mechanical stress (available short circuit) will be addressed by Tom Champion

P-1637 Proposed Revisions • PILC termination selection will be written by Harry Yaworski • Pictures of terminations • In addition, we will be moving section 9 from IEEE-48 to this guide and add the following list of items to the application guide section of the standard

P-1637 Proposed Revisions • Application Items:

– Multiple terms per phase must keep semicon ends at same elevation – Altitude derating – move from IEEE-48 standard – Hydrophobicity discussion – Tom C and Bill T – Location of stress control – Grounding of outer housing – Maintenance – Wildlife mitigation- Farris Jabril

P-1637 Proposed Revisions • Application Items continued: – Cable training & support – Mike Jackson – Temperature issues inside gear – Farris Jabril – Wind and Ice loading – Ref cable prep document – Transient Overvoltage performance – Tom Champion & Bill Taylor – Sealing

P-1637 Proposed Revisions • Application Items continued: – Sealing of lugs (compression and shear) – Aaron Norris – Overview of different types of lugs – Aaron Norris – Shelf life – make date easily read – Clarify indoor – outdoor switchgear – Cleaning – Tom Champion – Discoloration/deterioration

P-1637 Proposed Revisions • Proposal is to get written items for all of the previous listed sections, review them and incorporate them into the document to make it both a selection and application guide • We have written sections on many items and have discussed them in past discussion meetings and will discuss more this week • As we get closer to completing the sections and think we can get the guide revised in 4 years, we will obtain a PAR • Questions?