09TB-024 - Distribution Technology Home - Eskom

DISTRIBUTIONTECHNICAL BULLETIN20 July 2009 Enquiries: Rossouw TheronTel: (011) 651 6720TECHNICAL BULLETIN: 09 TB – 024Distribution standard: Part 4 – MVNOTES: This bulletin supersedes bulletin 07TB-030This bulletin should be read in conjunction with bulletin 09TB-002Distribution class surge arresters - Updated LAP1 BackgroundIn 2006 IARC conducted a technical and quality evaluation, in accordance with the CAP (Committee forthe Acceptance of Products) procedure, on distribution class surge arresters. The evaluation included thefull range of distribution class surge arresters (i.e. 11 kV, 22 kV and 33 kV) for inland and coastalapplications as well as the neutral arrester. The detailed evaluation report is, IADREPO00606 Rev.1, andtechnical bulletin 07TB-030 was published to communicate the details of the accepted arresters.In 2008 Maclean Power Systems (MPS applied to make certain changes to the arresters listed on LAP(List of Accepted Products). CAP granted an ad-hoc evaluation to evaluate the modified submission. Thechanges requested by MPS were accepted. The detailed evaluation report is, IADREPO00606 Rev.2, andtechnical bulletin 09TB-02 was published to communicate the details of the accepted arresters.In 2008 e-LEK Engineering applied for an ad-hoc evaluation, to be considered as an additional supplier ofthe Cooper surge arresters. The ad-hoc evaluation was authorized by CAP and e-LEK’s submission wasfound to be acceptable. The detailed evaluation report is, IADREPO00606 Rev.3, and the details of thesupplier are provided in this technical bulletin.On 12 March 2009 Cooper Industries notified CAP that the distribution agreement between Cooper andTswelopele Engineering was terminated. Tswelopele Engineering was therefore removed form LAP as anaccepted supplier.In 2009 Technology Integrated Solutions (TIS) applied for an ad-hoc evaluation. TIS took part in the initialevaluation process and offered the Bowthorpe arresters. They were however only accepted for Item 9.Bowthorpe subsequently addressed some of the noncompliant issues. The ad-hoc evaluation wasauthorized by CAP and the evaluation followed. Items 1 to 4 were found to be acceptable now. Thedetailed evaluation report is, IADREPO00606 Rev.3, and the details of the accepted arresters areprovided in this technical bulletin.This bulletin therefore contains the latest details of the accepted distribution class surge arresters, asavailable on the date of publication.INDUSTRY ASSOCIATION RESOURCE CENTRE,PRIVATE BAG 1074, GERMISTON, 1400, FAX: 011-871-2352

22 Items evaluatedThe products were evaluated against specifications DISSCAAN5 Rev. 4 and DISSCABC3 Rev.2.Item Description Buyers Guide SAP no.1 S/ARR DIST 11kV MCOV 10kV INLAND D-DT-3100 Rev.6 01650542 S/ARR DIST 11kV MCOV 10kV COASTAL D-DT-3100 Rev.6 01826073 S/ARR DIST 22kV MCOV 19.5kV INLAND D-DT-3100 Rev.6 01650554 S/ARR DIST 22kV MCOV 19.5kV COASTAL D-DT-3100 Rev.6 01826085 S/ARR DIST 33kV MCOV 29kV INLAND D-DT-3100 Rev.6 01747806 S/ARR DIST 33kV MCOV 29kV COASTAL D-DT-3100 Rev.6 01826107 S/ARR DIST 33kV MCOV 24kV INLAND D-DT-3100 Rev.6 01650938 S/ARR DIST 33kV MCOV 24kV COASTAL D-DT-3100 Rev.6 01826099 S/ARR NEUTRAL 6kV 10kA O/BUSH D-DT-3088 Rev.9 0165094

33 Accepted products3.1 Summary of accepted productsManufacturer’s product codeItemDescriptionSAP no. ArevaMacLean PowerSystemCooper Industries Bowthorpe EMP1 S/ARR DIST 11kV MCOV 10kV INLAND 01650542 S/ARR DIST 11kV MCOV 10kV COASTAL 0182607HE 12 S3D2 / RSA ZHP012-40090000K UHS12060VK9A9SYOCP1-10S-B2D1M-0503 S/ARR DIST 22kV MCOV 19.5kV INLAND 0165055 ZHP024-00090000K UHS24100VK9A9SYHE 24 S3D2 / RSA4 S/ARR DIST 22kV MCOV 19.5kV COASTAL 0182608ZHPA24-00090000K UHS24110VK9A9SYOCP1-20S-B2D1M-050OCP1-20L-B2D1M-0505 S/ARR DIST 33kV MCOV 29kV INLAND 0174780 ZHP036-00090000K UHS36130VK9A9SY Not acceptedHE 36 S3D2 / RSA6 S/ARR DIST 33kV MCOV 29kV COASTAL 0182610ZHPA36-00090000K UHS36160VK9A9SY Not accepted7 S/ARR DIST 33kV MCOV 24kV INLAND 0165093 ZHP030-00090000K UHS30120VK9A9SY Not acceptedHE 30 S3D2 / RSA8 S/ARR DIST 33kV MCOV 24kV COASTAL 0182609Not accepted UHS30160VK9A9SY Not accepted9 S/ARR NEUTRAL 6kV 10kA O/BUSH 0165094 HE 06 NO/RSA ZHP006-3000000 UHS06040T0W0AA1 OCP1-05S-NFH

43.2 Details of accepted Areva arresters3.2.1 Product summaryItemTypeProductcodeGLDtypeHousingmaterialCreepage(mm/kV)Ur(kV)Uc(kV)Ures(kV)ClassI (kA)12VarisilHEHE 12 S3D2/ RSAS3D2 Silicone 40 12 10.2 32.8 1 1034VarisilHEHE 24 S3D2/ RSAS3D2 Silicone 33.3 24 20 65.1 1 1056VarisilHEHE 36S3D2 / RSAS3D2 Silicone 33.3 36 30 97.5 1 1078VarisilHEHE 30S3D2 / RSAS3D2 Silicone 33.3 30 25 81.1 1 109VarisilHEHE 06 NO /RSAN/A Silicone N/A 6 5.1 16.4 1 103.2.2 Drawing summaryItem Outline drawing V/I curves TOV curve1 & 2 W 8997 13 12 / RSA3 & 4 W 8997 13 24 / RSA5 & 6 W 8997 13 36 / RSA7 & 8 W 8997 13 30 / RSA9 W 8997 11 06 / RSAVI 8997 01 YY / E rev. 00UT 8997 01 YY / E

53.3 Details of accepted Bowthorpe arresters3.3.1 Product summaryItemTypeProductcodeGLDtypeHousingmaterialCreepage(mm/kV)Ur(kV)Uc(kV)Ures(kV)ClassI (kA)1 & 2 OCP1OCP1-10S-B3D2M-094DD4TycoBrkt-4Silicone 31.7 12.5 10 34.6 13 OCP1OCP1-20S-B3D2M-096DD4TycoBrkt-6Silicone 26.3 25 20 69.2 14 OCP1OCP1-20L-B3D2M-096DD4TycoBrkt-6Silicone 31.6 25 20 69.2 19 OCP1OCP1-05S-NFHN/A Silicone N/A 6.25 5 17.3 1 103.3.2 Drawing summaryItem Outline drawing V/I curves TOV curve1 & 2 OCP1-10S-B3D2M-094 Rev.0 RDOCO339 Rev.03 OCP1-20S-B3D2M-096 Rev.0 RDOCO340 Rev.0RDOCO352 Rev.04 OCP1-20L-B3D2M-096 Rev.0 RDOCO343 Rev.09 RDOCO312 Rev.1RDOCO334 Rev.0OPERATINGCURVE Rev.0N/A

63.4 Details of accepted Cooper Power Systems arresters3.4.1 Product summaryItemTypeProductcodeGLDtypeHousingmaterialCreepage(mm/kV)Ur(kV)Uc(kV)Ures(kV)ClassI (kA)1 & 2 VariSTARUHS12060VK9A9SY Silicone 33.7 12 10.2 39.2 1 103 VariSTAR4 VariSTAR5 VariSTAR6 VariSTAR7 VariSTAR8 VariSTAR9 VariSTARUHS24100VK9A9SYUHS24110VK9A9SYUHS36130VK9A9SYUHS36160VK9A9SYUHS30120VK9A9SYUHS30160VK9A9SYUHS06040T0W0AA1 Silicone 29.1 24 19.5 72.8 1 10 Silicone 32.2 24 19.5 72.8 1 10 Silicone 25.52 36 29 110 1 10 Silicone 31.7 36 29 110 1 10 Silicone 23.5 30 24.4 91.8 1 10 Silicone 31.7 30 24.4 91.8 1 10N/A Silicone N/A 6 5.1 20 1 10Notes: - Cooper does not have a separate product code for the GLD, however, should any design change to theGLD come into effect, then the arrester product code digit#10 will change.3.4.2 Drawing summaryItem Outline drawing V/I curves TOV curve1 & 2 PO3A807X238 Rev.03 PO3A807X239 Rev.04 PO3A807X240 Rev.05 PO3A807X327 Rev.06 PO3A807X328 Rev.07 PO3A807X325 Rev.08 PO3A807X326 Rev.09 PO6A807X241 Rev.0P06A807X389 Rev.0P06A807X388 Rev.0

84 Supplier contact details4.1 Alstom HV EquipmentMake of accepted arresters: ArevaContact person: Jose GanchoTel: (011) 826 6677Cell: 082 416 7045Fax: (011) 823 90474.2 e-LEK EngineeringMake of accepted arresters: Cooper Power SystemsContact person: Leon KnollTel: (012) 349 2220Cell: 082 555 9995Fax: 086 613 91764.3 Lesedi ReticulationMake of accepted arresters: MacLean Power Systems (Joslyn)Contact person: Roger MartinTel: (011) 288 0000Cell: 082 554 0853Fax: (011) 288 20434.4 Mandlakazi Electrical Technologies (MET)Make of accepted arresters: Cooper Power SystemsContact person: Paul de CastroTel: (011) 316 4896Cell: 083 274 7887Fax: (011) 316 18954.5 Technology Integrated Solution (TIS)Make of accepted arresters: BowthorpeContact person: Silas MolokoTel: (011) 635 8000Cell: 083 454 2674Fax: (011) 635 8100

95 Ground lead disconnectorsVarious problems were experienced in recent years with the ground lead disconnectors (GLDs) that are suppliedwith distribution class surge arresters. These problems were analyzed and significant changes were made to thetype test requirements that are specified in the Eskom specification. The accepted surge arresters comply fullywith the requirements of the new specification.5.1 Joslyn-MacLean’s GLDIn April 2003 it was communicated via technical bulletin 03TB-022 that a problem was identified with someof the Joslyn GLDs. The GLD was incorporated into the mounting bracket as indicated in Figure 1. Joslyntherefore stopped supplying the ‘built-in’ GLD and external, ‘screw-on’ GLDs as indicated in Figure 2 weresupplied.Subsequently Joslyn redesigned the ‘built-in’ GLD and the required type test reports were submitted asproof of compliance with Eskom’s latest type test requirements. The new ‘built-in’ GLD looks from theoutside exactly the same as the previous design. The only way to distinguish between the old and the newdesign GLD is to look at the markings on the arrester. Joslyn was indicated on the arresters with theprevious GLD and MPS (MacLean Power Systems) is indicated on the arresters with the latest design.Figure 1 – ‘Built-in’ GLDFigure 2 – External GLD5.2 Areva’s GLDIn January 2005 it was indicated in technical instruction 05TI-04 that a moratorium was placed on theAlstom/Areva arrester due to the maloperations of the GLD, this GLD is shown in Figure 3.The moratorium on the Areva arresters was lifted in September 2005 as communicated in technicalbulletin 05TB-020. Areva designed a new arrester and it was color coded in orange for easy distinctionbetween the old and the new GLD, see Figure 4.