Feb 27, 2002 - Dong Wu. ⢠Chris Englebrecht. ⢠No news from Allan Hurst. 4. Membership. CL had written to Prof. Zheng Jianchao asking if he wished to ...
36-WG11/Milan/103 27/02/02 Minutes of the seventh meeting of Working Group 11 of TC36 (Revision of IEC 60815) Held at CESI on 29th to 31st October 2001.
Present: Clive Lumb – Project Leader (arrived late) Rick Suzuki Franco Marinoni Wolfgang Petrusch Frank Schmuck Eric Spangenberg Don Swift Jacek Wankowicz Wallace Vosloo 1. Opening of the meeting Franco Marinoni welcomed the experts to Italy and to the CESI laboratories. Don Swift, standing in for the Project Leader, thanked him on behalf of the WG. 2. Approval of the agenda The agenda (36-WG11/Milan/88) was approved. 3. Apologies for absence, Apologies for absence were received from • • • •
Gustav Goedel Richard Martin Dong Wu Chris Englebrecht No news from Allan Hurst
4. Membership CL had written to Prof. Zheng Jianchao asking if he wished to continue as corresponding member. He replied that he had changed jobs and was now working for the Chinese Nuclear Power Company. He regretted that he could no longer participate in the Working Group. It was suggested that a member from Russia would be useful since they have been using a statistical approach to insulation design for many years. CL to contact Igor Gutman/Chris Engelbrecht for suggestions. 5. Approval of the minutes from Renardières 36-WG11/Renard/78 Some discussion was made on point 10 – discussion of §7 of the draft – concerning terms for pollution types. It was agreed that the best way to describe the pollution types was by the most appropriate means of measurement or testing. In other words, a Type A pollution site could be monitored/evaluated by ESDD/NSDD or dust gauge measurements and solid layer/clean fog tests would be most appropriate. Type B sites could be monitored/evaluated by surface conductivity measurements and salt-fog testing would be most appropriate. CL & DAS to prepare appropriate text.
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36-WG11/Milan/103 27/02/02 For type B (salt fog style) sites CL to prepare text describing the principle of site severity measurements (Ih or conductivity) with values from document 94 and reference to CIGRE. Also mention that historical and continuing pollution measurements are useful for monitoring environmental changes. FS to add recommended method in column on table 3. RZ and WV agreed to produce a unified version of Annex B 6. Submitted document numbering The web site was updated with the documents submitted at the meeting as follows. 36-WG11/Milan/79
R. Martin
Revised table 2
36-WG11/Milan/80
K. Kondo
Drawings of cap & pin insulators
36-WG11/Milan/81
S. Nord
Porcelain shed profiles
36-WG11/Milan/82
D. Wu
Comments on the structure
36-WG11/Milan/83
D. Wu
Comments on the content
36-WG11/Milan/84
R. Suzuki
Comments on the third draft
36-WG11/Milan/85
R. Suzuki
Draft proposal of new Annex – Low solubility salts
36-WG11/Milan/86
S. Nord
Ideas for Chapter 9
36-WG11/Milan/87
C. Lumb
4th Draft of Part 1
36-WG11/Milan/88
C. Lumb
Agenda and timetable for the Milan meeting
36-WG11/Milan/89
C. Engelbrecht
Comments and contributions
36-WG11/Milan/90
W. Petrusch
Recommended minimum specific leakage for AC and DC
36-WG11/Milan/91
W. Petrusch
Influence of diameter
36-WG11/Milan/92
R. Suzuki
Comments on Pollution Performance and Insulator Diameter
36-WG11/Milan/93
R. Suzuki
Draft Proposal of New Annex: Pollution Deposit and Shed Profile of Insulators
36-WG11/Milan/94
W. Petrusch C. Engelbrecht
Evaluation of pollution severity for the case of "marine"-site contamination
36-WG11/Milan/95
F. Marinoni
Comments on the minutes of the 6th Meeting Special case for Marine site contamination
36-WG11/Milan/96
J. Wankovicz
Site severity for long rods
36-WG11/Doc/B9
C. Lumb
Updated list of members
36-WG11/Milan/97
CIGRE TF 33.13.01
CIGRE Flow chart
36-WG11/Milan/98
E. Spangenberg
Dimensioning rules at EdF in the 70’s
36-WG11/Milan/99
W. Vosloo
Summary of the various pollution classification levels
36-WG11/Milan/100
W. Vosloo
IPMR – Insulator pollution monitoring relay
36-WG11/Milan/101
W. Vosloo
Localised ESDD monitoring
36-WG11/Milan/102
R. Suzuki / W. Vosloo
Annex A : Measurement of ESDD and NSDD
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36-WG11/Milan/103 27/02/02 7. Report on the activity of CIGRE TF 33.13.01 (DAS) DAS reported on the results of the meeting held in Padua and presented the latest version of the flowchart (document 79). At this point further discussion arose on the case of “marine pollution” and documents 94 and 95 were tabled. DAS agreed to write a summary document before the end of the year. JW agreed to send info on the Polish method, RZ on the “ESDD” method and FS on the STRI method The customary question on whether the WG should meet before or after the next TF33.13.01 meeting was tabled. It was suggested that again the WG meet after TF 33.13.01. (See point 12) 8. Discussion of tabled documents 8.1. Milan/79
R. Martin
Revised figure 2
It was noted that there was a risk of confusion between old and new 60815 pollution levels. The new levels would be A, B, C .. etc. CL to implement and add correspondence table. The graph was again corrected, notably to limit the max NSDD on a suggestion from JW. It has been published as Stafford/111. 8.2. Milan/80
K. Kondo
Drawings of cap & pin insulators
These were in bitmap format, RZ to re-send as vector drawings. 8.3. Milan/81
S. Nord
Porcelain shed profiles
The drawings were integrated into the draft 8.4. Milan/82 Milan/83
D. Wu D. Wu
Comments on the structure Comments on the content
In the absence of DW, DAS agreed to bring up the points from these two documents as and when necessary during the discussions. Most of the points were later taken on board. In document 83 it was decided that it was not necessary to define the types of insulators. The flashover mechanism to be moved to an Annex and to refer to the CIGRE review. Move §8 before §7. Change title of §11. Change order of Annexes A and B. 8.5. Milan/84
R. Suzuki Comments on the third draft
Discussed as the draft was studied 8.6. Milan/85
R. Suzuki Draft proposal of new Annex – Low solubility salts
It was decided that RS and CE should draft a “one-line” text indicating the trend/correction for solubility and pointing to the CIGRE guide for further information.
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36-WG11/Milan/103 27/02/02 8.7. Milan/86
S. Nord
Ideas for Chapter 9
DAS asked if Form Factor was useful ? He thought not. WV said it had merit, but without values could not be used in a specification. JW said it was useful for design (for the manufacturer) but not for dimensioning. RZ said it was not used in Japan. WP said it did not really determine if the profile was adapted to the conditions. It was decided to remove Form Factor from the draft. It was decided that the materials part of the document would be reduced to glass/ceramic, polymers, hybrids, coatings and resins. 8.8. Milan/89
C. Engelbrecht
Comments and contributions
Agreed to add “or glass”. CL said normative references was OK. The definitions were also agreed – use “trunk” instead of “shank” for larger diameter insulators 8.9. Milan/90 DC
W. Petrusch
Recommended minimum specific leakage for AC and
Taken on board as support for the DC section 8.10. Milan/91 Milan/92
W. Petrusch Influence of diameter R. Suzuki Comments on Pollution Performance and Insulator Diameter
The WG opinion was that the influence is much less in natural pollution than in artificial. RS noted that the corrections given in his paper were for natural pollution. 8.11. Milan/93 R. Suzuki Draft Proposal of New Annex: Pollution Deposit and Shed Profile of Insulators DAS to combine this document and review data on the relative performance of profiles. Long rod data still required. 8.12. Milan/94 W. Petrusch/C. Engelbrecht Evaluation of pollution severity for the case of "marine"-site contamination Milan/95 F. Marinoni Comments on the minutes of the 6th Meeting - Special case for Marine site contamination Discussed under point 5. 8.13. Milan/96
J. Wankovicz
Site severity for long rods
It was decided to adopt a long-rod insulator with alternating sheds as the reference insulator. JW and RS to revise and complete. 8.14. Milan/97
CIGRE TF 33.13.01
CIGRE Flow chart
Presented and discussed under point 7. 8.15. Milan/98
E. Spangenberg
Dimensioning rules at EdF in the 70’s
This document was considered as being very important since it explains the source of the present IEC 815. ES agreed to rewrite and find more information and also to report on current practice in EDF. CL noted that the curves came together at 40 g/l. -4-
36-WG11/Milan/103 27/02/02 8.16. Milan/99
W. Vosloo Summary of the various pollution classification levels
Taken on board for reference. 8.17. Milan/100 W. Vosloo IPMR – Insulator pollution monitoring relay Noted 8.18. Milan/101 W. Vosloo Localised ESDD monitoring Noted 8.19. Milan/102 R. Suzuki/W. Vosloo
Annex A : Measurement of ESDD and NSDD
It was noted that chemical analysis could be useful – add a short note. WV and RS to finalise Annex A and add long rod reference insulator. CL to write text telling how month/year measurements can be compared (retention factor) Also how to compare DDG and ESDD measurements/ratios. Add note that if deposit is highly localised use measurement only from that half of the insulator. CL 9. Discussion of the rest of document 87 – 4th draft Discussion of profiles JW agreed to look into the relative pickup of pollution between long rods and cap and pins. WV proposed to do an on-site study. JW to supply the long-rod insulators A discussion of profile parameters brought to light the following: JW estimated that: •
creepage factor should be ≤ 2.5 for levels ABC and ≤ 2 for DEF.
•
S/p ≅ 1 and 0.8 for plain and alternating sheds respectively.
•
Alternating shed overhang > 30-35 bad for long-rods.
The applicability and values of profile parameters were decided as follows Parameter
Cap and pin
Others
s/p
N/A
Yes
Ld/d
Yes
Yes
p1-p2
N/A
Yes
α
Yes
Yes
CF
Not needed ?
Not needed ?
PF
Not needed ?
Not needed ?
Annex B.
Dust deposit gauge
WV to “round off” and add dimensional drawings
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0.8 plain, 1 alternating 15 mm
36-WG11/Milan/103 27/02/02 10. Examination of other outstanding documents (time permitting) All the tabled documents had been reviewed and/or integrated into the draft. 11. Task list, timetables etc. The tasks are shown above LIKE THIS The projected meeting plan, along with prospective readiness dates for various drafts is reproduced hereafter. The main target dates being : Part 1 – CD April 2002, Part 2 – DC/CD April 2002 Part 3 – DC October 2002 (Next TC 36 meeting in Beijing)
Part I
Part II
Part III
Now
% Time of meeting spent on each Part
April 2001 EdF
60 %
30 %
10 %
Oct 2001 Milan
40 %
40 %
20 %
April 2002 Stafford
30 %
50 %
20 %
Study comments 30%
40 %
30 %
Nov/Dec 2002 Cape town ?
12. Date and place of the next meeting CL suggested that the group try to meet back-to-back with CIGRE TF 33.13.01 in Stafford in March 2002. CL to contact Jeremy Wheeler to find out if this would be possible. Since few of the members were planning to attend the IEC General Meeting in Beijing, it was decided not to plan a meeting in conjunction with TC 36. It was suggested that a later meeting could be held in Nov/Dec 2002 in Cape town. 13. Close of the meeting The project leader thanked the members for their hard work and Franco Marinoni and CESI for their hospitality. He then declared the meeting closed
under polluted conditions Å Part 1: Definitions, information and ..... 7.2. Pollution severity levels. For the purposes of standardisation, five levels of pollution characterising the site ... Desert areas with fast accumulation of sand and salt, an
Dec 1, 2002 - Since the previous meeting, a corresponding member from Russia had joined the group â Dr. ... Some comments following the Stafford meeting.
Mar 10, 2002 - volume conductivity and sediment analysis for the pollutant collected by means of ..... qualitative picture for the pollution flashover mechanism is emerging which involves such ..... the date of instalment on the data result sheet.
Jun 22, 2001 - 5. Approval of the minutes of the 5th meeting held in Stockholm ... The application guide is focussed on helping utility engineers to choose an ...
Jan 27, 2000 - Swift, Don. Vosloo, Wallace. Wu, Dong. 1. Opening of the meeting. Sven Nord welcomed the experts to Stockholm and the IEC General Meeting ...
Jan 7, 2005 - Locking devices for ball and socket couplings of string insulators units - .... the compiled comments on this draft were studied and observations ...
Pollution is deposited onto the insulators mainly by wind and precipitation. ⢠âIndustrialâ type ... that dissolves slowly â such as cement, gypsum (A). The pollution ...
5) The IEC provides no marking procedure to indicate its approval and cannot be .... This structure is based on that used in CIGRE 33.13 TF 01 documents [1, 2], ...
entrusted to technical committees; any IEC National Committee interested in the ... In addition to the strategy and layout given by the task in 36/157/RVN, the orientation of the ..... These are areas located in close proximity to an industrial pollu
5) The IEC provides no marking procedure to indicate its approval and cannot be ..... Open profiles have good self-cleaning properties and are generally .... For long rod, post and hollow core insulators correct for average diameter Da m by:.
Sep 22, 2000 - has been decided to add a method of site severity evaluation for ... âglass fibre coreâ is not a technical .... cleaning properties strongly depend.
the insulating surface of polymeric insulators is manufactured of polymers or other organic ... The aim of this Technical Specification is to give the user means to:.
It is generally expressed in mm/kV. .... in areas exposed to a salt water fog or spray, or to other pollutants in the dissolved ... containing slow dissolving salts.
deposited onto the insulator by wind, such as deserts, heavily polluted industrial are as or ..... between a point on the insulating part and another on a metal part.
Additionally the user of the publication is now given means by which the selection ... the insulating surface of polymeric insulators is manufactured of polymers or ...
insulator (for a.c. systems usually Um/â3) It is generally expressed in mm/kV. .... exposed to a salt water fog or spray, or to other pollutants in the dissolved state.
Mar 26, 1999 - The minutes of a meeting are the last document to carry the place reference of that meeting, ... documents available for consultation/download.
10.3 Considerations for exceptional or specific applications or ..... insulator between those parts which normally have the operating voltage between them. ... For phase to earth insulation, this definition will result in a value that is ...... means
Repetition of clauses from other standards or parts of ... Agreed that repetition shall be avoided, however this .... difference in application between the two curves ...
Oct 15, 2003 - 10.3 Virtual functions . ..... 13.3.1.1.2 Call to object of class type . ..... 14.8.2.1 Deducing template arguments from a function call . ...... implementation is not required to document which behavior occurs. [Note: usually, the ran
Apr 15, 1998 - Part 7: Advanced Audio Coding (AAC) ... which can be used to transfer high quality digital multichannel and/or multilingual audio information on .... Therefore, nonbackward compatible (NBC) audio coding systems free of the constraints
FR. 3.2. Editorial. Cancel the last sentence "At least 7 .... Revise to read: â⦠in the relevant further parts of .... Location of the following sentence on description of ...
Dec 1, 2000 - In the field of information technology, ISO and IEC have established a joint technical committee, ISO/IEC JTC 1. Draft International Standards ...
