Technical Standards Training Nov01

Technical Standards Group

Network Engineering

Technical StandardsTechnical StandardsInformation SessionInformation Session

November / December 2001

Dene Ward, Gavin Jackson, Joe Frazzetto, Steve Neave


Network Engineering

Purpose of TodayPurpose of Today• Raise awareness of recent developments in

Powercor technical standards– general overview– details are in the standards (see the

Intranet/Internet)– varied audience (high/medium/low users of the

standards)• Advise of upcoming changes and initiatives• Seek feedback on effectiveness of

standards


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AgendaAgenda• Introduction• Technical Standards

changes– New Standards– Recent Revisions and

Updates– Work in Progress– Upcoming initiatives

• Product “show and tell”• Software Demo• Feedback Questionnaire


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Powercor PolicyPowercor Policy• Where a Powercor Technical Standard exists, it shall

be used in lieu of the superseded VESI standard– PCA staff, Contractors, Trainers and Auditors

• Material/plant to be used on the Network must beapproved and used as defined in the standards– if it is not specified in the standards, it is not approved– auditing will identify non-compliance and replacement

/rework will be required

• Impacts– More reliable, safe, legally compliant and cost effective

solutions


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Recent InitiativesRecent Initiatives

• VESI Standards are on the Intranet• Work instructions, product brochures and

user manuals• “Powervision” information video• Use of training CD’s• Approved materials list on the Internet

– high risk areas eg : U/G, P/L, LA’s, Insuls, Tx• Non-compliance memos


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Upcoming Initiatives (2002)Upcoming Initiatives (2002)• Dist. Automation (ACRs,

Gas Switches, Regs, etc)• Line capacitors• Non-conductive pole

structures– alt. to wood pole– alt. crossarms

• Pole footing redesign• “Smart Design”• Conductor guidelines

– revised ratings based onlocalised conditions

• Transformers– “TT” type– “Rodgers” connected

• Domestic solar cellsconnections

• Fusing– group and/or fuseless

• Pole rebutting• O/H Switch location

guidelines• Innovations via

“Eighthgate”• ETSA technical alignment

2002 Themes : “Smart Design” and “Compliance”


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Audit / Compliance IssuesAudit / Compliance Issues• Use of “Q” lugs &

M5DRs

• Incorrect earthing ofcrossarms (wood poles)

• Preformed ties

• Pit Connectors

• Surface logs andbedlogs

Crossarm


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Change Speaker...Change Speaker...


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• DC021 - Design Heights & Circuit Separations (“ReadyReckoner”)– Provides conductor heights above ground for LVABC and 22kV at

poles– Heights for 12.5, 14, 15.5 & 17m poles– Provides circuit separations for a range of wood structures

• DC141, DC151 & DC201 - Updated to include 66kVclearance information (EK - Subtransmission)

DC - ClearancesDC - Clearances


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DE - ConnectorsDE - Connectors• Updated to include connectors for

underground applications, including new“link” standard (DE206)

• Bonding standard updated (DE303):– Removed bonding on pole-top for intermediate

wood pole structures– Include additional bonding in some cases in

coastal & polluted applications


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• DG111 - New earthing installation standardfor ACRs

• DG301 - Updated CMEN standard for LVABC• DG211 - Kiosk Earthing Assembly

– Completion by December 2001– Based on 3.5m x 3.5m reserve for front access

kiosks• Earthing standards (part 2 ) - information &

installation standards to be completed in2002– Marker tape requirements - OCEI

DG - EarthingDG - Earthing


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• Earthing designsoftware to beinvestigated– EPRI -

‘DistributionEngineeringWorkstation’

– CYMEInternational -‘Power SystemsSoftware’

– plus manyothers

DG - EarthingDG - EarthingSoftware Example - An Earthing Analysis via MATLAB

Depth Below Gnd(m)

Voltage

ρ1 = 2301 ohm/m

ρ2 = 344 ohm/m


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DP - DP - OvercurrentOvercurrentProtection (revisit)Protection (revisit)

• Recently introduced a new HV fuse - S&CFault Tamer (FT)– improve reliability/

avoid spurious fuseoperations and hang-ups

– FT cost effectivenesscompared to Boric Acid

– Regional training onthese items conductedin April/May


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DP - DP - OvercurrentOvercurrentProtection (revisit) cont..Protection (revisit) cont..• Install Fault Tamers in lieu of BA and PF

fuses for all new installations ≤ 20A– Selection information

in DP011• FT’s weight is comparable

to BA and less than a PF• Reporting of mal-

operation to the hotline– 9683 4151 (24hr)


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DQ - DQ - OvervoltageOvervoltageProtectionProtection

• New cable head pole arrangementintroduced to reduce potential for animalinduced flashovers on cable head polestructures (DQ201):

• Phase-phase flashover - increase phase-phase clearance via re-designed bracket

550mm400mm

750mm(arrester-arrester)


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DQ - DQ - OvervoltageOvervoltageProtection cont..Protection cont..

• Phase-ground flashover - bushing boot tocover “live” copper connection bus– Boot is fully insulated & UV stabilised– Still provide

flag-bolts foroperationalpurposes (notprotrude farenough to bea bird perch)

750mm


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• LV Reticulation Plans - Substation Circuits(DD091) and Town Plans (DD095)– interim standard until GIS takes over

• DD041 - Construction Plans DRPs– Changes made to typical new pole description

Old Description New DescriptionHV TERM (EJ152AFAAE) HV TERM (EJ152)S(ST)2.6/125

• DD021 - Standard Sheets (templates)– New standards templates are being developed– Version controlled and referenced to DD021– ensures uniform and up-to-date information, dwg layout,

symbols, drawing approvals etc

DD-Drafting StandardDD-Drafting Standard


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• Proposed to issue every 6 month or as required• Issue to field personnel only

– 1 per truck– contains construction info only– Office staff refer to the Intranet (up to date information)

• Old version to be recycled locally• Colour coded cover (latest colour is green)• Issue number has been included• Updates to be inserted into pocket at the back• Next issue approx. April 2002

Field Construction ManualField Construction Manual


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EB - PolesEB - Poles• New high-strength wood pole specifically

for 66kV construction only (17m/20kN)– Introduced to reduce the amount of stayed

poles in 66kV construction– Cost analysis completed (versus staying)– Standard 12kN footing - concrete and log, but

increased setting depth of 3.4m (standard 17msetting depth is 2.5m)

– Minimum pole diameter @ ground line - 445mm– Approximate weight - 2200kg


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EC - ConductorsEC - Conductors• Removed fixed MES sag and tension tables

– EC211 to EC441– Now use variable MES with StringEx

• New stringing tension for 66kVconstruction (EC255) with 19/4.75 AAC– “Standard” stringing for 19/4.75 AAC– Introduced to provide longer spans than EC251

and greater unstayed angles than EC261


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EC - Conductors cont..EC - Conductors cont..• New stringing tension (EC255) with

19/4.75 AAC cont.– Cost analysis completed (versus EC251 and

EC261), identified 10% cost saving onhypothetical 50km line

– Based on maximum tension (18% of CBL) beforerequiring vibration dampers

– Nominal MES is 95m, maximum MES is 130m– May also be used at 22kV– StringEx to be updated with EC255


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EE - EE - CrossarmsCrossarms• New intermediate crossarms for 66kV

construction– Reduction in weight and cost– S(IN)2.6-66 - 100 x 100 x 4 SHS, 32kg– S(IN)3.2-66 - 100 x 100 x 4 SHS, 39kg

• Use existing VESI strain crossarms for66kV construction– Technical analysis indicated no benefit in

calculated range of new strain crossarms (samesections and length required as SL series)


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EE - EE - Crossarms Crossarms cont..cont..• New strain

crossarmselection charts– 19/4.75, 37/3.75– SL series &

S(ST) series


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EF - Insulators &EF - Insulators &AttachmentsAttachments

• Insulator procurement process– New contract awaiting CEO signoff– 6 month to 16 week initial delivery lead times– many new items to be introduced

• New 66kV “cycloaliphatic” post insulators– 50% lighter than porcelain– Passed 5000hr weatherometer test– Tie-top and horizontal clamp-top


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EF - Insulators &EF - Insulators &Attachments cont..Attachments cont..

• New 66kV strain insulators– Cost competitive to 2 x 33kV units– Multiple suppliers

• New 2-disc equivalent 22kV straininsulators– Specifically for maintenance applications

• 22kV post insulator with integral studincluded as a “standard” item


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EG - Stays & AnchorsEG - Stays & Anchors• New 66kV stay arrangement

– 2 x GY4 stay insulators connected in series– Meets mechanical & electrical performance to

ESAA HBC(b)-1– Significantly cheaper than specific 66kV strain

“long-rod” type insulators

Helical Splice

Approx. 2000mm


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EG - Stays & AnchorsEG - Stays & Anchorscont..cont..

• New 20m stay coils in SAP– Reduced weight and less potential for waste– MI # 351971– Provided in 80% of installations (No 5, 15.5m

pole and below)– 56m coils still available for longer stay

installations• SC/AC stay wire and fittings removed from

store– Field confusion (left-hand lay)


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BreakBreak


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EK - EK - SubtransmissionSubtransmission• Standard structures for 66kV construction

IntermediateStrain

VerticalInsulators

SteelCrossarms Centre-Ø

Bracket66kV StrainInsulators

BridgingBracket


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EK - EK - SubtransmissionSubtransmissioncont..cont..

• Poletop Centre-Phase(Intermediate/Angle)– New design (not 22kV)– Mech. tested to 11kN– 100 x 100 x 4 SHS– Weight - 32kg– Integral M24 nut for

insulator mounting

Bracket M20 Bolt

M24 Kingbolt


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• Poletop Bridging (Strain)– Use 22kV pole top centre-

phase bracket– Two additional holes to

mount for bridgingBracket

M12 Bolt

M12 x130Coachscrew


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• Horizontal Bridging (66kV and 22kV)– To replace current 22kV arrangement -

impractical

Bracket

M16 x 130 Coachscrew

M24 Welded Nut


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• Update existing effected standards– EE - Crossarms (new intermediate)– EF - Insulators & Attachments (post and strain)– EG - Stays & Anchors (new stay arrangement)– EB - Poles (new 17m/20kN wood poles)– EC - Conductors (new chart - EC255)– EJ - Three-Phase Structures (new subsidiary

standards)• Target date for release of EK and other

existing standards is end Dec


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EA - General OverheadEA - General Overhead• Raiser bracket design for low conductors

– Spreadsheet (EA141 HVRaiser) for determining maximumspans and angles

– Wood pole 1-phase and 3-phase applications (with orwithout LV subsidiary)


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• EJ051, EI051 -Design Schedules– Schedules created

for single circuitangles & strainstructures for

• Three phase with19/3.25 AAC, 3/2.75Steel & 6/4.75-7/1.60 ACSR

• Single phase with3/2.75 Steel

EH, EI, EJ - StructuresEH, EI, EJ - Structures


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• EJ401 - Three Phase Raiser Bracket– Cost effective means of obtaining Ø-Gnd and

Cct-Cct clearances• avoid pole replacements• used for wood poles only

– Limits calculated via “EA141 HVRaiser.XLS”spreadsheet

• Copies of spreadsheet available from local ‘DesignChampions’

• EA141 provides information on use of thespreadsheet

• EJ to be amended to include subsidiaryconst for use with 66kV standards (EK)

EH,EI,EJ - Structures Cont.EH,EI,EJ - Structures Cont.


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• EL101, EL201 - Wood &Concrete TransformerStructures– Split into Single Phase and

Three Phase transformerstructures

– EL101, EL201 - SinglePhase\SWER transformers

– EL103, EL203 - Three Phasetransformers

EL- TransformersEL- Transformers


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• EL101, EL201, EL103, EL201, EL301– Include option of ordering LV fuse and mounts– Fusing size based on transformer fusing tables

(DP021)• Transformer pole loading limits under

review by external consultant.– weight limits for transformer / pole

combinations• Imperial (“A” and “B”) and CCA treated poles• Completion by May 2002

EL- TransformersEL- Transformers


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• EM191 - Three Phase HVIsolator Assembly– Updated to include 30deg

mounting of isolators foruse on ACR structures

• EM195 - SWER HVIsolator Pole MountAssembly (WIP)– Mounts single insulator

isolator onto pole mountfuse bracket via 135degconversion bracket (SAPID# 351882)

EM- Switches, Fuse MountsEM- Switches, Fuse Mounts& Isolators& Isolators


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EP - RegulatorsEP - Regulators• New approved ground mounted design

formulated (dwg PCA 17/000001 and PCA17/000003)– Compatible with 2x1Ø, 3x1Ø or 1x3Ø units– Allows upgrades from 3MVA (100A) to 10+MVA– Operator, maintenance staff and public safety– Whole of life costing showed minimal difference– Eliminates ESNA Regs clearance issues

(highlighted in recent OCEI audit)– Currently the only approved design in Powercor


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EP - RegulatorsEP - Regulators

• Future directions.....– Develop pole mounted 100A solution– Investigate alternate regulator makes– Investigate “in-line” ground mounted solution– Remote control– Develop a comprehensive technical standard

• information and installation sections• approved products in SAP• task lists


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ER - ER - ACRsACRs, , Sectionalisers Sectionalisers &&Fault IndicatorsFault Indicators• Scope

– To develop a Powercor standard thatdetails the approved application,design & construction practicesrelating to ACRs, Sectionalisers &Fault Indicators.

– In doing so, opportunities wereexplored to:

• Meet or improve current H&S standards• Meet new ESNA regulations• Improve customer service through

improved system reliability and• Achieve cost savings where appropriate


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• Three Phase ACRs– Standard structures

• ER101 - Rural (highcurrent, high faultlevel) - 3 sets of isols

• ER111 - Rural (lowcurrent, low faultlevel) - 1 set of isols

• ER121 - Urban - 2 setsof isols

– All 3 phase ACRs areremote controlled

ER -ER - ACRs ACRs


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• Three Phase ACRs– Keep by-pass options for access, testing and

H&S reasons esp. in rural areas– Nulec - CAPM 2 (CAPM 4 by December)

• Cooper ACRs very expensive due to exchange rate• CAPM 4 provides more protection options

ER -ER - ACRs ACRs cont.. cont..


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• To be used as part of NetworkReliability solution

• Cost effective method to isolatesection of lines– where a new ACR is not financially viable– where coordination of fuses and

ACR/CBs is difficult– avoids spurious operation that can occur

with fuses

ER -ER - Sectionalisers Sectionalisers


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• Utilises mechanical drop outmechanism– avoids incorrect operation found in

chemical actuated styles of sectionalisers– reset by pushing in lever (No spare

actuators needed)• 2 types with selectable ratings and no

of counts of:• 8A to 24A, 40A to 112A• 1, 2 or 3 counts to drop out

ER -ER - Sectionalisers Sectionalisers cont.. cont..


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• ER031 - Info Section– Provides guidelines on selection,

location, and settings– FIs are not for co-gen or 66kV

ring lines.– Overhead

• Pole mount - 22kV single cct (‘Clean’)pole only

– Earth, LV, CATV catenaries, otherHV circuits provide alternate faultpath and may trigger pole mountunits

• Conductor mount types to avoidthese problems

ER - Fault IndicatorsER - Fault Indicators


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• ER031 - Info Section cont.– Site selection guidelines

• Most effective locations (approx every 500customers) OR

• Within 30min (effective) patrol time– Line length patrolled in this time (varies depending

on terrain, traffic)– Urban (15km), Rural roadside (30km) and Rural

difficult (8km)– And where combination of distance with No of

Customers affected >200

ER - Fault Indicators cont..ER - Fault Indicators cont..


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• Overhead (ER301, ER311)– Pole mount (SAP ID# 351761)

• ‘Clean’ pole only– Conductor mount (SAP ID# 351831)– Flite 110 or Nortroll 110E

• Programmable for di of 6A, 12A, 24A, or 60A• Selection based on either:

– Set di > Capacitive feed back current (approx 1Aper km of HV u/g)

– Set di to approx. min ACR or CB trip rating orEOL fault level (on fused spurs)

• Thus, correct operation relies on correctsettings



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• U/G (ER321)• 400A

– 35mm2, 95mm2• 600A

– 185mm2, 240mm2• Very cost effective

option (approx $70each)

• Use on all outgoingswitched HV at kiosks



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• ACRs– Nulec ACR (used previously).– CAPM 4 will be new control card.– Three structures to choose from depending on use

• Sectionalisers– New single phase drop out style - mechanical lever– Two ratings which are field setable– Ratings to be shown in SAP, GIS and on System plans

• Fault Indicators– Overhead indicators have limited battery life.– All FIs to be in SAP, GIS and on System Plans

ER - Summary & ImplicationsER - Summary & Implicationsof New Equipment Introducedof New Equipment Introduced


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• ACRs– Revisit alternate ACR’s & Controllers

• alternate communications medium required such as GSM

• Sectionalisers– Review other products

• Fault Indicators– Review need for SCADA connection as part of

Comms and Control strategy– Review application of directional fault indicators

(approx. $4000 each)

ER - Future InvestigationsER - Future Investigations


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• Standard to be completed approx. end ofDec 2001

• Standard outline:– FA - General Information– FB - Poles– FC - Cable– FE - Brackets & Stays– FL - Lanterns– FM - Electrical Connections, Fusing & Control– FY - General Materials

F- Public LightingF- Public Lighting


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• FA - General Information and FL - Lanterns currentlyWork in Progress– New Australian Standards (AS1158 series) required the

creation of new spacing tables based on• Cat P - Pedestrian Lighting

– Cat P4 used in URD areas and P5 used for areas within o/h LV poleareas

• Cat V - Vehicle Lighting

• Public lighting equipment reviewed and new tenders inplace by Dec 2001

• Metal Halides to be reviewed in 2002• Powercor design via software (Perfect Lite) or spacing

tables to Council requirements

F- Public Lighting cont..F- Public Lighting cont..


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ES- Bare LV StructuresES- Bare LV Structures• ES411 - Multiple In Span Servicing

– Used to solve service wire ground clearance or propertycrossing problems

• more cost effective than u/g or service pole option– Catenary supported of up to 4 services– Maximum of 70m LV Bare span and 35m service– Future review of single in span service via spreader rods

to be investigated in 2002• Problem - Long services tend to twist spreader rod and LV

and cause uplift/potential failure on LV insulators andreduces clearances


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• ES131 - Doublestrain crossarminstallationstandard to bedeveloped in 2002– Also update EE -

Crossarms

ES- Bare LV StructuresES- Bare LV Structurescont..cont..

In-Span Servicing example


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ET- LV ABC Mains &ET- LV ABC Mains &ServicesServices

• ET411 - Multiple In Span Servicing– Catenary supported of upto 4 services– Maximum of 70m LV ABC span and 35m service span

length• ET421 - Single Service Span, In Span Servicing

– Direct from LV ABC– 20m max service span length


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• ET061 - Updated to include information onselection of in span servicing

• LV Raiser Bracket innovation - to be developedin 2002 to address low services– Attaches to LV crossarms

ET- LV ABC Mains &ET- LV ABC Mains &Services cont..Services cont..


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• Consultant engaged to completestandard by June 2002

• Materials to be investigated in Dec 2001– ‘Vinny’ bushing covers - under trial in Port

Fairy– ABB ‘Rulle’ Tape– ‘Raychem’ fuse mount covers (alternative to

the Pheonix covers)– ‘Salisbury’ conductor cover (alternative to

Pheonix covers)– and other products

EV- Animal MitigationEV- Animal Mitigation


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• Scope of project– Information standards to cover

• Bird Mitigation - EV011– Review concrete polymer covers– Fuse covers– Appropriate air gap– Aerial markers or ‘’noise’ making products

to ward off birds– ‘Swan’ (open delta) construction– Insulated raiser bracket for HV insulators

EV- Animal Mitigation cont..EV- Animal Mitigation cont..


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• Scope of project - cont.• Possum mitigation - EV021

– Pole guards– Stay and service cable guards, LVABC and

HVABC ‘rotating’ covers - currently undertrial in the You Yangs

– HV bushing covers– Use of insulation eg polytube covered

droppers, insulated & screened droppers,wood poles (no earthing)

EV- Animal Mitigation cont..EV- Animal Mitigation cont..


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G - UndergroundG - Underground• GA - General Underground• GB - Underground HV Cable & Accessories• GC - Conduits & Cable Pulling• GE - Cable Head Poles• GL - Kiosk Substations• GS - Underground LV & Servicing• GV - Equipment Bases & Enclosures


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GA - General U/GGA - General U/G• GA070 - HV Network

Design Guidelines (revisit)– Residential switching zones

based on number ofcustomers at risk, not thenumber of substations

– Consistent and “smart”approach to HV U/G design

• technical and commercial


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GB - HV Cable & GB - HV Cable & AccAcc..• Cable/Conductor Procurement

– Joint process with ETSA– Completion date Dec 01

• GB011 - Cable Information Standard– Cable characteristics– Physical data– Application guidelines– Current ratings– Short circuit ratings


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GB - HV Cable & GB - HV Cable & AccAcc..cont..cont..

• Joints and Terminations Procurement– Cold applied indoor &

outdoor HV terminations– Cold applied HV straight

joints

– Cold applied trification kits


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• Joints and Terminations Procurement cont..– Advantages of cold applied products:

• No flame required in flame sensitive situations• Range taking - unlike heatshrink they continue to apply

pressure to accommodate expansion and contractionwith thermal cycling

• One piece - with built in stress control• More forgiving of poor cable preparation• Sheds on terminations are automatically located


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• Joints and Terminations Procurement cont..– Loadbreak elbows and

accessories, standardfor 200Amp applications

– Deadbreak pin type contactelbows and accessories,standard for 400Ampapplications

– Deadbreak bolted typecontact elbows for limited630Amp applications


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• Joints and Terminations Procurement cont..– Separable HV tee joints

– Roll-out (including training) in March 02


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GC - Conduit & CableGC - Conduit & CablePullingPulling

• Conduit Procurement– Contract placed with Iplex– Large $$ savings achieved, now all SAP items– Continuous polyethylene conduit

• approved for use at 750mm depth only (at this stage)• 63mmOD (351691) and 110mmOD (351692)• Currently negotiating with OCEI to classify as

equivalent to HD conduit for mechanical protection– Corrugated (flex) conduit

• 32mmOD (351693) - 25m roll with draw wire


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GE - Cable Head PolesGE - Cable Head Poles• New CHP assembly

– New surge diverter bracket(increase Ø- Ø)

– New copper bus arrangement(surge diverter to droppers)

– New insulated bushing boot(Ø- G protection)

– Flag-bolt still available– 630mm2 assembly to be

developed


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GL - Kiosk SubstationsGL - Kiosk Substations• New tender in progress• New design & layout• Rotary “in-oil” switches• Load break/make fuses• Smaller land reserve• Front access only• Provision to fit loggers• Generator connection• Slab provided (≤ 500kVA)

Slab Provided


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GL-Kiosk Substations cont..GL-Kiosk Substations cont..


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GL-Kiosk Substations cont..GL-Kiosk Substations cont..• Prototypes built in Aug 01• Design finalised in Sep 01• Negotiate terms & pricing (Sep / Oct)• Recommendation to CEO and Board (Nov)• Await first delivery (Nov + 12-16 weeks)

– field training to occur• Indicative costs

– 315kVA “RMU” : was $27K, now $20K* (-25%)– 315kVA Loop : was $21K, now $18K* (-15%)

* includes slab


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GS - U/G LV & ServicingGS - U/G LV & Servicing• Joints and Terminations Procurement

– Cast resin LVstraight joints

• No flame– Heatshrink LV

straight joints• Immediate

backfilling oftrench(1hr for castresin to cure)


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GV - Equipment Bases &GV - Equipment Bases &EnclosuresEnclosures

• Service Pit Assembly• Pillar Assembly• Kiosk Bases and Vaults

– Investigating appropriate means of cable accessto new Kiosk transformers


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The EndThe EndThankyouThankyou

1. Satisfaction Survey1. Satisfaction Survey2. Raiser Bracket Software Demo2. Raiser Bracket Software Demo


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Software Demo...Software Demo...

Technical Standards Training Nov01

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Transcript of Technical Standards Training Nov01