ausgrid powerpoint

ASP3 Seminar

16 November 2011

Welcome

Matthew Hindson Manager - Contestability

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Agenda 9:00am Welcome and Contestability Update Matthew Hindson

9:10am Ausgrid Major Connections update Melissa Daniels

9:25am 2011 CAD Design Template update Max Labecki

9:40am Ausgrid Installation Policy & Compliance update Noel Dyer

10:00m Ausgrid EIA Worksheet Process Matthew Gencur

10:30am Break

10:45amHigh level design considerations for Chamber Substations

David Tomlin

11:45am Ausgrid Street Lighting update John Bedding

12:00pm Q & A All

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Introductions & Housekeeping

• Emergency exits and facilities

• Mobile phones off/silent please

• Questions at the end of the seminar please

– Verbal answers today

– All questions recorded

– Some may be deferred

• Ausgrid staff in attendance

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Contestability Update

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Contestability Update

Major Connections Update

Melissa Daniels Senior Consulting Engineer

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Who We Are

Rob BaxterDirector

Tuggerah Suite 12

Melissa DanielsSenior Consulting Engineer

(Newcastle & Lake Macquarie)Tuggerah Suite 12

John DuckSenior Consulting Engineer(Sydney City, North, South

& Central Coast)HOB Level 9

Kevin SmithSenior Consulting Engineer(Kooragang Island & Hunter)

Wallsend

Domenic NotarnicolaEngineer

HOB Level 9

Patrick GuineyEngineerWallsend

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What We Do

•

New or modified customer connections at 33kV, 66kV or 132kV•

Generator connections > 5MW

•

Negotiate sub‐transmission network re‐arrangements•

Facilitate contestable asset relocations at 33kV, 66kV and 132kV

•

Assist System Planning by engaging with major customers in the Area Plan review process

•

Provide key contact role for very large (CRNP) customers (generally >10MVA)

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Differences•

Lower project volume, smaller team, typically complex

projects with complex requirements, longer timeframes.•

Major Connection Brief ‐

incorporates Design Information

for Contestable Works and Installation Information and Requirements.

•

Network standards still developing ‐

iterative design process.

•

Comprehensive Design Submission required for final certification.

•

Emphasis on reviewing the constructability of designs.•

Project Co‐ordinator involved up to energisation of the

installation.

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Projects with Distribution & Transmission Assets

•

Try to limit hand‐overs

between groups.•

Single point of contact based on volume / scale of work

involved.•

Mixed projects will involve Contestability and Major

Connections groups supporting each other.•

Lead group will determine process flow / requirements.

2011 CAD Design Template Update

Max Labecki Ausgrid CAD Manager, Standards & Communication

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CAD Agenda

• What’s NEW in the ASP template and how to use it

• Working in MGA coordinates

• Using the correct Ausgrid CAD Standards

• What Ausgrid expect from you

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What’s NEW in the ASP template and how to use it

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Working in MGA Coordinates

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Using the Correct Ausgrid CAD Standards

5.2.1 General Network project electrical designs must be based on current CAD software formats (AutoCAD.dwg or Microstation.dgn). Designs should conform to the standard symbology and layering conventions outlined, detailing all existing and proposed electrical network infrastructure together with any relevant cadastral information.

5.2.2 Mapping Reference Points All designs should be geo-referenced in Mapping Grid of Australia (MGA) coordinates.

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5.2.3 Aerial Photography Raster images or aerial photography incorporated in the design must conform to Ausgrid’s layering convention.

5.2.4 Existing & Proposed Electrical Infrastructure CAD or DXF files of existing electrical infrastructure must be sourced from the GIS. These files conform to Ausgrid’s standard layering specification and are geo-referenced in MGA coordinates.

Proposed electrical network alterations must be based upon this existing information and use the same Ausgrid standard layering naming conventions and MGA coordinate references.

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XT_ NON AUSGRID LAYER


5.2.5 Ausgrid CAD Layering Naming Standard Standard layer / level names for existing & proposed electrical works are included in Ausgrid’s CAD template provided.

The CAD layering standard is made up of various components, describing the existing and proposed electrical infrastructure (e.g. LV_OH_EXIST, HV_SUB_PROP etc).

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5.3 Standard Symbols Ausgrid’s standard symbols for existing and proposed assets shall be used for common infrastructure in all electrical design and construction plans.

Standard symbols and their correct layer allocations are shown in Ausgrid’s standard CAD drawing template.

Note: Infrastructure symbology may vary between Ausgrid’s GIS plans and Ausgrid’s System Diagrams.

5.4 Drawing Line Styles and Weights Ausgrid’s standard line styles and weights are to be used on all designs.

Standard line styles and line weights are set up on the associated layers in Ausgrid’s standard CAD drawing template.

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What Ausgrid Expect from You

• Use the Ausgrid supplied template

• Use NS104 as your guide

• Work in MGA Coordinates

• Check your drawing

Installation Policy & Compliance UpdateNoel Dyer Manager, Installation Policy & Compliance

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• Proposed changes to the NSW Accreditation Schemes – DTIRIS

• Substation lead times, commissioning target dates, team orchestration

• Design issues confronted during construction

• Criticality of site familiarity

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Proposed changes to the NSW Accreditation Schemes

• Recommendations of the BRO report

• Steering panel representation and objectives

• Alignment of Level 1 and Level 3 company accreditation categories

• Registration of individuals

• Performance monitoring

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Proposed New Categories

1. Distribution 1a. Underground cable reticulation (LV & HV) 1b. Overhead mains reticulation (LV & HV) 1c. Pole substations 1d. Kiosk type substations 1e. Chamber type substations

2. Subtransmission (33kV – 132kV) 2a. Underground cable reticulation 2b. Overhead mains reticulation 2c. Substations

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Substation Lead Times, Commissioning Target Dates & Team Orchestration

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Ausgrid Substation Commissioning Procedure

ASP/1 to Rectify / Complete works•ASP/1 to book further PC Inspection

once works have been completed or

submit any outstanding paperwork•ASP/1 to submit a new ORF with

revised commissioning date.(Minimum 4 weeks notice required for

rescheduled commissioning date)

Non Commissioning CTW’s / AP’s•Completion of any non

commissioning works that require

CTW’s or AP’sAP’s – 4 weeks noticeCTW’s – 2 weeks notice

Practical Completion Inspection(Minimum 2 weeks prior to Commissioning)

•All Substation works MUST

be completed•(only minor rectification works can be completed prior to

commissioning)•All paperwork MUST

be submitted•Satisfactory Practical Completion Inspection

Commencement of Works•ASP/1 to notify ASP C/O of

Milestone Inspections(4 days written notice reqd)•(Must include major

milestones ie.Substation

piering, Sub landing, Sub

testing)

Substation Commissioning

Initial Site MeetingDocumentation to be provided by ASP/1

prior to commencement of works •Permits (Council and/or RTA)•Traffic Control Plans•DBYD Plans•Project Planning Form including

nominated Anticipated Project Completion

Date

Request by ASP/1 for Commissioning(Minimum 5 weeks prior to Commissioning)•Submission of completed TEI Sheets•Submission of Substation Testing Sheets•Submission of Operator Request Form

No

Yes

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• Lead Times – must be factored into targeted commissioning date

– Kiosk Substations

• 6 weeks (on average)

– Chamber transformers, HV and LV switchgear

• 12 weeks (allowance)


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• Team Orchestration

– Substation commissioning required scheduling and coordination of multiple Ausgrid teams. Up to six weeks in advance for complex construction.

– Ausgrid cable jointers – identification of HV cables

– Ausgrid linesmen – access permits, earthing and overhead links

– Ausgrid protection technicians – setting up new and existing protection

– Ausgrid field technicians – induced HV winding tests (if required)

– NEW – setting up Distribution Monitoring and Control (DMC) equipment.


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Design Issues Confronted During Construction

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• Non-standard joint requested. Pot end required.

ORIGINAL DESIGN AMENDED DESIGN


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• Non standard symbol used on HV schematic



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• PT was removed, LV bonded through but no open point between the two LV distributors in the new substation.



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• In this case (commercial area) conduits should be installed the whole length of the cable run not just in B-B and H-H



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• HV end boxes on the Site Design Plan are the reverse to the Final HV System Diagram and the Substation Arrangement

SITE DESIGN PLAN FINAL HV NETWORK


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58338

58339

SUBSTATION ARRANGEMENT FINAL HV SYSTEM DIAGRAM


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• No details shown for Reference “F”

• Wrong joint shown Reference “D”

• No system diagram


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• Design calls for 2 x HV Tee joints to be broken down and remade as STJ. This is not possible. The Tee Joints need to be cut out and as such then it becomes 4 x STJ’s.

• HV schematics show non- existent substations.

• All notes throughout the designs still refer to “Energy Australia” not Ausgrid.


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Other Issues Encountered

• Footing depths of poles not shown

• Overhead line clearances not calculated no topography considered

• Multiple overhead construction omissions indicating lack of designer experience

• 4 to 1 joints should be made externally at substations with 4 LV circuits due to physical constraints terminating internally.

• Trenching details not adequate or not shown

• Differentiation of the contestable components of construction from other work.

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Being Familiar with the Site is Critical

• It is considered essential that the designer must be familiar with the site.

• Site checks should be carried out during the design BEFORE certification.

• It is Ausgrid’s preference that the designer attends a SITE MEETING with the ASP1 prior to the commencement of construction.

The designers’

responsibility does not end at certification but continues during construction, through warranty period for the

life of the asset(s).

EIA Worksheet Process

Matthew Gencur Environmental Officer

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Today’s Presentation

• Abbreviated version of EIA Training

• Full one day course can be provided

• As well as course materials there are several exercises going through the completion of an EIA

• All Ausgrid staff who prepare EIA’s are required to complete this training course every two years. We encourage ASP3’s to also complete the training every two years.

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Introduction

6 Step EIA Process

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Step 1: Defining the Scope

Description of Works

• Concise description of the proposed works

• Plant and equipment to be used

• Ancillary works – access tracks; site compounds; stockpile sites etc

• Confirm any exclusions

• Refer to and attach design drawings

• Sources of information – development brief; design drawings; site inspection etc.

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Step 1: Defining the ScopeExample 1:

1. Refurbishment of chamber substation H.S.6001 including:– Removal of all redundant substation equipment– Installation of new equipment (11kV switches, transformer, LV

board and associate infrastructure)– Civil works to the substation structure, i.e. ventilation, doors and

fire suppression.– All substation works will be undertaken in accordance with

Network Standards NS113 Site Selection and Civil Design Standards for Chamber Type Substations and NS114 Electrical Design and Construction Standards for Chamber Type Substations.

2. Cut and remove or abandon redundant HV, LV and Pilot cables3. Installation of underground cable joints in King St, Brown St and

Congregational Lane. All excavation works will comply with Ausgrid’s Network Standard NS130 Specification for Laying of Underground Cables up to 22kV (refer to attached concept design).

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Step 1: Defining the Scope

Example 2:

• Replace approximately 5700m of single phase 11kV steel mains with 2W 6/1/3.00 “Apple” ACSR

• Replace 31 poles and install 2 new poles• Replace 3 existing pole top substations 70822 (49104), 70823 and

70824 (49105) in approximately the same location• Replace associated ground stays• No new access tracks or crane pads would be required• No site compounds or stockpile site would be required• Plant and machinery required to complete the works would include

EWP: 50t crane; pole jinker; borer; low loader; dump trucks etc.

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Step 2: Collecting Information

Ausgrid Environmental Planning Website

http://www.ausgrid.co m.au/Environmental- planning.aspx

http://www.ausgrid.com.au/Environmental-planning.aspx



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Step 2: Collecting InformationWhere to Find

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Council

• S149 Planning Certificates are required where works involve individual properties

• Responses from Council notifications

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Development Applications for Associated Works

Information from Statement of Environmental Effects or Review of Environmental Factors associated with the works must be used.

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SEWAC Protected Matters Search Tool

http://www.environment .gov.au/arcgis- framework/apps/pmst/p mst.jsf

Then do search by coordinates or location

http://www.environment.gov.au/arcgis-framework/apps/pmst/pmst.jsf




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OEH Heritage Register/Inventory

Local, regional and state significant non- indigenous heritage:

http://www.heritage.nsw.gov.au/

http://www.heritage.nsw.gov.au/

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Step 3: Approval Process

Approvals Process Calculator:

The Approvals Process Calculator will guide you through:

• Determining the NSW planning approval process

• Whether additional planning approvals are required

• Whether external approvals/licenses are required, and

• The notification requirements

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Step 4: Consultation

• Electricity Supply Act 1995

• S45 – 40 day notification required for any works

• Except for routine repairs or maintenance work.

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Step 4: Consultation

SEPP (Infrastructure) 2007

• 21 days notification to Councils for development with impacts on:

– Council-related infrastructure or services

– Local heritage

– Flood liable land

• 21 days notice to public authorities other than councils eg. Development adjacent to land reserved under the National Parks and Wildlife Act 1974

• 21 days notification of electricity substation development to adjoining land occupiers

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Step 5: Preparing the EIA Worksheet

Table 1 – Project Details

• A description of those activities of the project that are being assessed under Part 5 of the EP&A Act

• The description should include all of the activities to be assessed including ancillary works such as earth works, fencing and land clearing

• A drawing should be attached to the EIA Worksheet to assist in describing the scope of works.

NOTE: include any ancillary activities such as street lighting, access tracks, fences, tree trimming etc

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Table 1 – Future maintenance activities

• A description of future maintenance activities. It should include future activities such as operation of the network, maintenance, access track usage, tree trimming and termite treatment.

Table 1 – Major projects that had an EIA (ie REF) associated with this project

• A description of any major projects that had an Environmental Impact Assessment (ie REF) associated with this project (eg A new zone substation development in which this EIA worksheet is being prepared for the 11kV works associated with it).

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Table 1 – Project need and justification

A firm project need and justification is required before proceeding with the assessment. In most cases the justification is that the customer requires supply, however, in some cases alternatives may exist (eg. New line extension versus new substation installation) and a justification is required as to why this project is the preferred option.

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Table 1 – Route/site option justification

A justification for the route or site selected for the activity. Sufficient information should be provided to enable an insight into why that particular site or route was chosen and what other sites/routes were considered.

NOTE: It may be necessary to revisit this step after identifying any Project Specific Control Measures in Table 4.

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Table 1 – Indicative commencement date and duration of works

A reasonable understanding of timings, phasing and schedules is important to assess the extent and nature of the impacts.

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Table 1 – Ownership of the relevant land

• To determine whether the proposed activity will traverse private lands you can contact the local council. However, if you are unable to obtain property information, then a title search through the Department of Lands may be required.

• The Electricity Supply Act 1995 allows Ausgrid to carry out work, install/remove electricity works on a public road or public reserve.

• Generally speaking, easements are required in other locations where the owner is not Ausgrid.

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Table 1 – Description of land use

A description of the land use both within and adjacent to the proposed activity (eg. Residential, industrial, bush land, waterbodies etc).

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Table 1 – Mandatory Notification

Enter the date of Authority Notification, details of any submissions made, and how they have been addressed.

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Table 1 – Community Consultation• Enter the date of the Community Notification, details of any

submissions made, and how they have been addressed.• Under SEPP (Infrastructure) 2007, 21 days notice is

required to the occupiers of adjoining land if the proposed works are for the purpose of a new or existing electricity substation of any voltage.

• If an activity is likely to have more than a minimal impact, and there is an opportunity for the community to be involved in the route or site selection, then additional community consultation should be considered.

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Table 1 – Environmental Planning Instruments relevant to the activity and area

Confirm SEPP (Infrastructure) 2007 is relevant to the activity. List any Local Environmental Plans (LEPs) or Regional Environmental Plans (REPs) that may provide valuable information in undertaking the assessment.

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Table 2a – Working near matters of National Environmental Significance (Commonwealth)

Could the activity affect a matter of National Environmental Significance (NES) ?

Tick yes if you are working near items of NES (refer to protected matters search):

– World Heritage properties– National Heritage places– RAMSAR wetlands– Listed threatened species or endangered communities– Listed migratory species– Commonwealth marine areas– Commonwealth land

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Table 2a – Working near threatened species, endangered ecological communities, etc (NSW)

Could the activity affect threatened species, populations or ecological communities or their habitat ?

Tick yes if you are working within an area of known threatened species and one of the following applies:

– You are clearing/pruning/affecting vegetation (excluding routine maintenance as defined by NS179 and Ausgrid’s Tree Safety Management Plan)

– Disturbing bush rock, tree hollows, wetlands, mangroves, nests, aquatic or other sensitive habitats

– Working in, storing equipment, parking vehicles or accessing the site through undisturbed areas

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Step 5: Preparing the EIA Worksheethttp://wildlifeatlas.nationalparks.nsw.gov.au/wildlifeatlas/watlas.jsp

http://wildlifeatlas.nationalparks.nsw.gov.au/wildlifeatlas/watlas.jsp

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Table 2a – Working near marine vegetation (mangroves, seagrass beds, etc) or dredging a waterbody

Could the activity affect marine vegetation such as seagrass or mangroves or will you be dredging a waterbody ?

Tick yes if you are working near marine vegetation or dredging a waterbody.

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Table 2a – Working with a Conservation Areas (NSW), National Parks Estate

Could the activity affect a Conservation Area including: Marine Parks, Aquatic Reserves, Declared Wilderness Areas or National Park Estate (National Parks, Nature Reserves, State Conservation Areas, Regional Parks, Aboriginal Areas or Historic Sites) ?

Tick yes if you are working within or adjacent to any of the above listed.

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Table 2a – Impacting State, Local or S170 Register (Non- Aboriginal) Heritage

Could the activity impact an item of Non-Aboriginal Heritage?

Tick yes if you are impacting Local, State or S170 listed heritage items.

Check State Heritage Register/Inventory.

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Table 2a – Working near Aboriginal Heritage

Working near an item or place of Aboriginal heritage or an area registered under the Native Title Act 1993 ?

Tick yes if you are working, storing equipment, parking vehicles or accessing a site:

– Near an identified item or place of Aboriginal heritage

– Near a Potential Aboriginal Deposit (PAD)

– In native title excluding routine maintenance

http://www.environment.nsw.gov.au/awssapp/Login.aspx?Re turnUrl=%2fawssapp%2fUserRegistration.aspx

http://www.environment.nsw.gov.au/awssapp/Login.aspx?ReturnUrl=%2fawssapp%2fUserRegistration.aspx

http://www.environment.nsw.gov.au/awssapp/Login.aspx?ReturnUrl=%2fawssapp%2fUserRegistration.aspx

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Table 2a – Working near Aboriginal HeritageA PAD is likely to be found if you:

• Are working in undisturbed areas or natural landscapes

• Observe any evidence of Aboriginal artefacts or past habitation such as caves, rocks, overhangs and platforms, shell mounds

• Are working next to freshwater, springs, swamp, bush foods etc

• Are removing undisturbed topsoil.

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Table 2a – Working within a Drinking Water Catchment Area

Are you working in a drinking water catchment area ?

Tick yes if you are working within a drinking water catchment area including Special Catchment Areas as declared by the Sydney Catchment Management Authority such as Woronora Catchment Area.

Works must not be carried out in Sydney Catchment Areas unless 28 days notice has been given.

http://hcr.cma.nsw.gov.au/default.asp?section_id=8

http://www.sca.nsw.gov.ay/publications/publications/148

http://hcr.cma.nsw.gov.au/default.asp?section_id=8

http://www.sca.nsw.gov.ay/publications/publications/148

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Table 2a – Working within State Forests/Area Subject to a Forest Agreement

Is the work taking place in a State Forest or an area subject to a Forest Agreement?

Tick yes if you are working within State Forests or an area subject to a Forest Agreement.

There are almost 2.9 million hectares of State Forests in NSW. These forests include flora reserves, rainforest reserves, native forests, cypress pine forests, exotic pine plantations and eucalypt plantations.

http://www.dpi.nsw.gov.au/forests/recreation/sydney

http://www.dpi.nsw.gov.au/forests/recreation/sydney

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Step 5: Preparing the EIA WorksheetTable 2a – Altering ground water, water bodies, etc

Will the activity involve the temporary or long term alteration of groundwater and/or surface water?

Tick yes if your project involves the temporary or long term alteration of groundwater and/or surface water including:

– Groundwater extraction or dewatering

– Extracting water from a stream, river or water course via a pump or other work

– Extracting groundwater via any type of bore, well, spear point or groundwater interception scheme (including dewatering).

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Step 5: Preparing the EIA WorksheetTable 2a – Discharging to Stormwater or Sewer

Will the activity involve discharging to stormwater or sewer?

Tick yes if the activity involves discharging to stormwater or sewer.

Under the Protection of the Environment Operations Act (POEO Act), a license is required to discharge any pollutant to stormwater.

If the source of the discharge is from groundwater or for dewatering purposes, contact Environmental Services for further information.

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Step 5: Preparing the EIA WorksheetTable 2b – Handling, storing, transporting or disposing of Controlled Chemicals such as PCBs or OCPs

Does the activity involve handling, transporting or disposing of controlled chemicals such as PCBs or OCPs?

Decommissioned substations may have potential PCBs in transformer oil.

Undertake sampling of oil prior to disposal to determine transport and disposal methods. Ausgrid holds a current EPA licence under the Environmental Hazardous Chemicals Act, 1985 (licence No 53). The licence allows Ausgrid to keep and convey PCB wastes and PCB materials. All oil handling must be in accordance with Ausgrid’s Distribution Guidelines 70A Occupational Health & Safety Oil Handling.

Potentially PCB contaminated oil must be handled, transported, stored and disposed of in accordance with EG100.

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Table 2b – Working within a Mine Subsidence District

Does the activity occur in a Mine Subsidence District?

Under the Mine Subsidence Compensation Act 1961 approval is required from the Mine Subsidence Boards before subdividing, erecting or altering any improvements on land that is within a proclaimed Mine Subsidence District.

The Board does not require approvals for minor works, repairs and maintenance which includes pillars, street lighting, fibreglass housings, wood pole installations, distribution transformers, service lines, low voltage distribution networks, etc.

Mine subsidence areas are shown on the Mine Subsidence website http://www.minesub.nsw.gov.au/templates/mine_subsidence_b oard.aspx?edit=false&pageID=3758

http://www.minesub.nsw.gov.au/templates/mine_subsidence_board.aspx?edit=false&pageID=3758

http://www.minesub.nsw.gov.au/templates/mine_subsidence_board.aspx?edit=false&pageID=3758

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Table 2b – Working on a Classified Road

Will any part of the activity occur on an RTA classified road?

Under the Roads Act 1993, RTA approval is required for any works that may impact a classified road. A classified road includes a freeway, state highway, main road, tourist road or secondary road. The Roads Act 1993 is administered by the Roads and Traffic Authority (RTA).

Classified roads are shown on the RTA website http://www.rta.nsw.gov.au/doingbusinesswithus/downloads/lg r/reg_table_for_internet_31jan11.pdf

http://www.rta.nsw.gov.au/doingbusinesswithus/downloads/lgr/reg_table_for_internet_31jan11.pdf

http://www.rta.nsw.gov.au/doingbusinesswithus/downloads/lgr/reg_table_for_internet_31jan11.pdf

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Table 2b – Working on Crown Lands or Crown Timber Lands

Will the activity occur on crown lands or crown timber lands?

To determine whether the proposed activity will affect Crown lands you can contact the local council or the Department of Lands through their Crown Land Enquiry service at:

http://www.lands.nsw.gov.au/crown_land_enquiry

http://www.lands.nsw.gov.au/crown_land_enquiry

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Table 2b – Working within Bushfire Prone Land

Will the activity occur on bushfire prone land?

Development in bush fire prone areas of NSW is subject to Planning for Bush Fire Protection 2006 and Australia Standard: 3959 Construction of Buildings in Bush Fire Prone Areas (AS:3959).

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Local Council Website

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Table 3a – Siting oil filled equipment within 40m of a sensitive area or within 5m upstream of a drain

Will the activity involve siting oil-filled equipment within 40 metres of a sensitive area (waterways, National Parks etc) or 5 metres upstream of a drain?

NS141, NS122 and NS117 apply to locating new kiosks and pole transformers (PTs).

If a non compliant location is proposed then justification must be provided and Environmental Services can then make the determination that the current proposed location is the best option.

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Table 3a – Working within areas with contaminated land

Will the activity involve siting infrastructure in an area likely to contain contaminate land?

Contaminated Lands information can be found from Local Council or OEH. Indicators of contaminated land include surrounding land use, site history, past studies, oily or odorous material, buried or exposed fill/waste, dead vegetation, ash, slag, coke or brightly coloured material, and asbestos.

http://www.environment.nsw.gov.au/clm/publiclist.htm

http://www.environment.nsw.gov.au/clm/publiclist.htm

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Typical Construction Project

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Likelihood of Impacts Occurring

1 - Unlikely to happen 4 - Likely to happen2 - Might happen 5 - Will happen3 - 50% chance

?

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Extent of Impacts

1 - Low2 - Low – Medium3 - Medium4 - Medium – High5 - High

What is the scope?

What is the duration?

What is the intensity?

What is the size?

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Sensitivity of the Environment

What is the level of resilience?

Is it reversible?

What is the level of public interest?

Ability of the environment to cope?

Does it comply with standards?

1 - Low2 - Low – Medium3 - Medium4 - Medium – High5 - High

ENVIRONMENT

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x

=Environmental Risk

Likelihood

Extent

Sensitivityx

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Likelihood Extent Sensitivity Risk Rating Proceed?

1 1 1 1Minor and predictable impacts – proceed with EIA Worksheet

2 2 2 8

3 3 3 27

3 3 4 36Refer to Environmental Services for review

4 4 4 64

5 5 5 125

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Likelihood Extent Sensitivity RISKNOISE impacts(construction)

Likelihood Extent Sensitivity RISKNOISE impacts(construction) 5 3 4 60

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Step 6: Verify the EIA

Add Attachments

Please add any relevant attachments to the form by using the ‘Add Attachment’ button located near the end of the form.

The attachments can be any file type, including:

– Plans/drawings

– Pictures

– Permits/approvals

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Check for Errors

Check the form for errors:

List of errors:

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Printing

You can print the EIA eForm at any time throughout the assessment, verification, and when it has been approved.

You can either print the form in a condensed version for construction or in it’s full form.

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Decision & Sign Off

• Project has minor and predictable impacts:

– Impacts are not ‘significant’– No HIGH environmental impacts– All trigger areas referred to Environmental Services– No impacts require further investigation

• Approval for works subject to the Mitigation Controls:

– Table 4– Conditions of approval/permits/licences

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Form Submission

Click the ‘Assess EIA’ button located under ‘Form Submission’

You are certifying that:– “I have completed this worksheet in accordance with NUS174

Environmental Procedures Supplementary Notes EIA Guidelines, and– The assessment meets the requirements of sections 5A, 111 and 112 of

the EP&A Act and Clause 228 of the EP&A Regulation, and– The information contained in the worksheet does not materially mislead,

and– The project has minor and predictable impacts and can proceed subject

to the requirements of NUS174 Environmental Procedures and any Project Specific Control Measures.”

Short Break

High level design considerations for Chamber substationsDavid Tomlin Contestability Project Coordinator

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What is a Chamber Substation?

• A chamber substation in effect is an ‘indoor substation’ and is not exposed to the external elements such as a kiosk (padmount) or outdoor enclosed substation. The chamber can either be incorporated into a existing or proposed building to save on outdoor space, or be established as a dedicated free standing chamber external to a building.

• Chamber substations are generally required where a kiosk substation is not an option due to supply requirements, site conditions or DA approval.

• Design and construction costs involved are more than that of a kiosk substation and projects take much longer to complete.

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What are the different types of Chambers?

Surface Chambers

• Installed at or above ground level. The maximum height is 2000 mm above the lowest finished surface level of the roadway or footpath from the point where personnel and equipment access is gained.

• This is the most common type of chamber installed and preferred by Ausgrid, as it allows easy access to the substation for maintenance, and is also the most cost effective for the client. This should be the first option to be considered by designers.

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Surface Chamber

Chamber room with 3x1500kVA TX configuration, LV cable chases and water service.

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Basement Chambers

• Used when there are no viable alternatives to a surface chamber, and may be permitted only with the written approval of Ausgrid.

• First useable level below the finished ground level in the case of multi-level basements, and must not exceed a depth of 4.3 metres below the finished ground level.

• The injection of carbon dioxide (CO2 ) is required for the purposes of extinguishing fires in Basement Chambers via an injection valve accessible by Fire & Rescue NSW.

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Basement Chamber

Basement Chamber with 1500kVA TX, and inlet ventilation louvre

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CO2 Injection Point

CO² Injection Point, the number 12 indicates the number of CO² bottles to be used by Fire & Rescue NSW

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CO² Delivery System

CO² delivery pipework to be delivered from the CO² connection box to the chamber room via 25mm diameter pipes. Nozzles attached to the pipework are to be located at critical areas where fires are likely to occur (e.g. Oil Filled Transformers)

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Elevated Chambers

• Used when there are no viable alternatives to a surface chamber, and may be permitted only with the written approval of Ausgrid.

• Floor level of elevation is between 2000mm and 6000mm above the lowest point of the adjacent street or roadway level from where personnel and equipment access is gained.

• Must not have equipment containing oil due to the reduced ability to extinguish fires, therefore dry type transformers (1500kVA) must be installed. Customers are required to fund the cost difference between dry type and oil type transformers.

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What are the different types of Chambers?Upper Level Chambers

• Most commonly found in Sydney's CBD area or large town centres (e.g. Chatswood, North Sydney). Can only be approved by Ausgrid as an additional substation to an existing or proposed building that contains a basement, surface or elevated chamber as an initial substation.

• Must be provided with a control point room at street level, one floor above or below to allow switching of the upper level chamber for emergency purposes.

• The control point must comply with the same requirements for a basement, surface or elevated chamber substation. For Upper Level substations dry type transformers are utilised and customers are required to fund the cost difference.

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Upper Level Chamber

Upper Level Dry Type Transformers

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High Voltage Customer (HVC) Chambers

• Similar to that of a control point for an upper level chamber substation, and must comply with the same construction requirements.

• The internal room space of the chamber is to be negotiated on a case by case basis.

• All customer metering equipment including Voltage Transformers (VT’s) and Current Transformers (CT’s) must not be installed within the chamber. These are part of the customers’ installation.

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Common Personnel Access Requirements

• All chamber substations are required to have two forms of personnel access to the substation at two extremes of the chamber room. These must be accessible by Ausgrid staff 24 hours a day, 7 days a week, with ingress/egress out onto a public street or an all-weather heavy-duty access roadway which complies with the Building Code of Australia (BCA).

• This does not apply to an upper level substation where a right of way (ROW) must be established through common areas e.g. Foyer of a building, Lift etc

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Specific Personnel Access Requirements

• Surface Chambers - Two personnel doors opening inward directly out onto a public street from the chamber. The chamber can be provided with access passageways to the chamber room. All CBD surface chambers must be provided with two Access chambers with doors at either end of the passageway.

• Elevated Chambers – have two options for access. The first and preferred option is for two dedicated access chambers and stairways up to the chamber room. The second option, once approved by Ausgrid, is having one form of access via access chamber and stairwell, and the second is to have a shaft and ladder in lieu of a stairway. In both instances a vertical shaft between lower and upper access chambers is required for lifting of small equipment into the chamber.

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Surface Chamber Access Door 2400 x 1000mm Fire Rated inward

opening door with a minimum120mm – 190mm step up from outsidethe chamber.

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Basement Chambers

• Two dedicated street accesses and stairwells down to the chamber via access chambers (preferred).

• One access via stairwell, and the second form of access is via a ladder and shaft down to the chamber.

• One access via stairwell, and the second via hatchway with a fixed descending ladder.

Options two and three can only be used once option one is exhausted and Ausgrid has given approval.

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Upper Level Chambers

• Must be provided with two separate access chambers on the chamber floor.

• Access from street level to the access chamber is through the customers premises via a ROW, and must not be made from a nominated public or occupant fire stair, or through parts of the building which may be occupied or tenanted.

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Personnel Access hatch with a 1410mm x 880mm shaft opening. Personnel hatch must not be placed in trafficable areas, like transformer hatches.

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Transformer Access Requirements• Surface Chamber substations - are to be provided with

3100mm x 1700mm access doors (preferably outward opening) to accommodate the installation and removal of transformers up to 1500kVA in size. Head room above the area where transformer handling area outside the substation is to be at a minimum height of 4 metres to allow an articulated crane (Franna) to deliver the transformer.

• Elevated & Upper Level Substations – also utilise access doors identical to that of a surface chamber, however the doors are required to swing inward, unless installed on top of a building with open space outside the chamber. Transformer delivery and handling must have two options. Unlike a surface chamber one method must be by either crane and also by a monorail/trolley or temporary outrigger platform (most common is a monorail arrangement). When initially installing the transformers, at least one transformer must be installed by the monorail & trolley.

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Transformer Access Requirements

• Basement Chamber Substations – differ to that of any other chamber as access doors are not used. The ceiling of a basement chamber must be provided with a waterproof transformer access hatch 2200mm x 1600mm (2300mm x 1700mm for dry type if required).

The hatch is required to be located within 5.2metres of an all weather access roadway suitable for heavy-duty vehicles.

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Transformer hatches are constructed out of reinforced concrete to withstand the weight of heavy vehicles. They are also provided with foot anchors for removal by a crane.

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When installed, hatches are waterproofed and sealed using megaprene hot melt at the top and bottom of the hatch cover.

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Ventilation Requirements

• Ventilation of a chamber is essential to ensure that substation equipment can dissipate heat during normal operation.

• One of the most important factors involved with chamber design and can drastically affect the layout of a proposed chamber if not designed correctly in the preliminary phase of the project. Ventilation requirements vary depending on the type of chamber being installed.

• Chambers installed within suburban areas use natural convection to regulate the air temperature. Where chambers are installed within Sydney's CBD area, temperature is regulated via mechanical ventilation (turned on/off by transformer thermostats). This is monitored by Ausgrids’ System Control via the CBD Scada network.

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• Surface Chambers – are most commonly ventilated via louvred transformer doors, the number of louvred doors is proportional to the number of transformers within the substation. If the transformer doors can not be used for ventilation then equivalent sized dedicated louvres will be required. Louvred transformer doors are unacceptable where located in high traffic areas, shopping centres and Sydney's CBD. Also at least one personnel access door can utilise a louvred door to improve ventilation.

• Elevated & Upper Level Chambers – have a similar ventilation arrangement to that of a surface chamber, where the chamber wall is fully louvred due to the substation requiring delivery of heavy equipment by monorail beam. In instances where the substation is not adjacent to an outside building wall, ventilation via inlet and outlet ducts is required, identical to a basement chamber ventilation system.

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Surface Chamber Ventilation

Transformer Access Doors outward 180° swinging doors, 3100mm x 1700mm in size with a 120mm - 600mm step up from outside the chamber.

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Basement Chambers – require a much more complex ventilation arrangement compared with a surface chamber due to the substation transformers being located away from the outside ambient air.

Ventilation is carried out through inlet and outlet ducts, which vary in size depending on the number of transformers and size (1000kVA or 1500kVA). The chamber must provide ‘cross flow ventilation’ across the transformers between the inlet opening located 120mm to 190mm above the finished chamber floor level (FFL), and the outlet opening located high on a wall or in the ceiling.

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Internal Ventilation Inlet Louvre

Basement Chamber Internal ventilation louvres with fire dampers

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External Ventilation Inlet Louvre

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External Ventilation Outlet Louvre

Outlet ventilation openings must be at least 6 metres away from the inlet opening, and the bottom of an outlet louvre must not be less than 1.2 metres above the top of an inlet louvre

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Basement Ventilation Ducting

Ventilation ducts are required when effectively positioned inlet/outlet openings can not be achieved. Vents must not exceed an aspect ratio of 4:1.

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Mechanical Ventilation (Sydney CBD)

Mechanical ventilation can only be found in CBD chambers on the triplex system, and must be a 760 mm diameter vane axial exhaust type fan

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Transformers

Surface and Basement chambers utilize oil type transformers. Chamber substations can have a variety of transformer configurations, which depend on the supply capacity required and the type of chamber (due to easy access for emergency services, CO2 fire suppression system for basements etc), and come in three sizes 750kVA, 1000kVA and 1500kVA. Oil type transformers are ideal for Elevated. Upper Level chambers utilise dry type transformers and come in one size at 1500kVA.

Where dry type transformers are used, the customer is required to fund the cost difference between the oil and dry type. Ausgrid would prefer to have the substation at ground level.

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Substation HV Switchgear Arrangements

Suburban Ring Main Isolator Fuse Switch (RMIFS) - can have up to two 1000kVA transformers. Each transformer is protected by a HV fuse (11kV or 5kV) and is selected by Ausgrid depending on the supply requirements. The RMIFS isolators are connected in series with the feeder and the transformer protection fuse as a tee off. In a two transformer arrangement the bus section is open as these substations have no summated overcurrent protection.

O

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Suburban Ring Main Fuse Switch

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Substation HV Switchgear ArrangementsIsolator and Earthing (I&E) Switches – are only utilised in Sydney’s CBD where substations are supplied via three separate feeders to three separate transformers from a zone substation ‘triplex system’. The substations have no fused protection for the substation and have a much greater reliability than other substation types. The substation works on a ‘n-1’, ‘n’ being the number of transformers. If one of the feeders were to become faulty, the substation would still be able to maintain the required supply to an installation.

3000 A max

3000 Amax

3000 Amax

3000 Amax

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Isolator & Earth Switch (I&E) (CBD Triplex Substations)

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I&E’s fitted with pull out gear to allow remote operation of Switchgear, within adjoining access chamber

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Suburban Ring Main Isolator Circuit Breaker (RMICB) – are most commonly utilised in the following transformer arrangements, 2 x 1500kVA, 3 x 1000kVA and 3 x 1500kVA suburban substations. The RMICB’s utilise transformer overcurrent protection to cater for sizes up to 1500kVA. Substations with a 2 x 1500kVA transformer configuration require no bus section at the low voltage board, however three transformer substations require a normally closed bus section to enable maintenance of the middle transformer on the feeder, due to the other two transformers being supplied via separate feeders.

3000 A max

3000 A max

or

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• Fully Switched Chamber Substations – are the most reliable type of suburban chamber, and provide similar reliability to Sydney CBD’s triplex system. The substation is supplied via dedicated feeders and dedicated circuit breakers for each transformer.

• In the event of a feeder outage the substation is equipped with send and/or receive intertrip relays to switch over to the second feeder connected to the substation. This type of substation is not commonly installed on the network as it imposes larger installation costs onto customers.

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Transformers 1, 2 and 3

Feeder A

Feeder B

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E-Type Low Voltage Board

Customer Supply Air Circuit Breakers (3000A ACB’s) 650mm Wide

Transformer Incoming Air Circuit Breakers (2000A or 3000A ACB’s) 650mm Wide

Fused Distributor Panel (Multiple Configurations 650mm Wide

3000A Bus Section 900mm Wide

Service Panel 280mm Wide

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Duct, Chases & Pits

In the initial phase of a chamber design it is essential to configure the layout of conduits, chases and pits. This must be co-ordinated with the architect to ensure that pit depths, cable chase gradients are being constructed correctly and mirror that of the electrical design.

Cable chases – are most commonly utilised for low voltage transformer tails, and must extend the full length of the transformer (to ensure the tails do not impact on the chase edge). Each transformer must be provided with a separate chase to the low voltage pit.

Pits – are required in all chambers for HV switchgear and LV switchboards. Pits are also required for protection, earthing and also scada (CBD Substations only).

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Ducts, Chases & Pits

Conduit layout prepared for initial concrete pour

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Ducts, Chases & Pits

Chamber under construction, with formwork prepared for final concrete pour.

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Standard type chamber substations

Ausgrid substation engineering group has recently designed two ‘standard type’ chamber substations (a replacement for the ‘unit chamber’ type substation) which can be used for sites which have a small footprint and space constraints.

The chamber dimensions measure 4200mm x 4600mm for layout 1, and 5600mm x 2800mm for layout 2.

Currently a network standard is being written for the chambers and will be available soon. Projects can commence based on this type of chamber.

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Standard Surface Chamber

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Standard Surface Chamber Layout 1

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Standard Surface Chamber

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Standard Surface Chamber Layout 2

Street Lighting Update

John Bedding Street Lighting Engineer

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Topics covered today

• NS119 – Published May 2011

• Consolidated Hunter and Sydney/Central Coast standards

– DI vs SI, fused brackets, Hunter standards, insulating spigots

• Current standard Category P and Category V luminaires

– 42W CFL, HPS vs MBF/U, new long life lamps, Bulk Lamp Replacement (BLR) strategy

• Explanation of rates

• Decorative luminaires

• New Technology

– LED trials

– Active reactor

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NS119 – Street lighting design and construction May 2011

• Applies to all street lighting systems which are to be owned and operated by Ausgrid on behalf of customers

• Electrical design and construction work for contestable projects to be performed by ASP’s

• Lighting design to comply with AS1158. Lighting designer shall be qualified by appropriate training and experience to undertake Australian Standard compliant designs

• Documentation demonstrating compliance with AS1158 to the customer

• Ausgrid compliance officer to check/test before commissioning

• Ausgrid approved materials only to be used for rate 1 and rate 2 installations

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Hunter vs Sydney/Central Coast• Hunter – Single insulated• Sydney/Central Coast – Double insulated• Street lighting columns starting in Hxxxxx have earthing tab• All standard road lighting luminaires currently purchased

are single insulated• Insulating spigots used on single insulated luminaires to

form double insulated system• Hxxxxx brackets do NOT come with fuse. Fusing is per

drawing 514057 and 514148. NS 119 Reference drawings available at: http://www.ausgrid.com.au/Common/Our- network/Standards-and-Guidelines/Network- standards.aspx

• Rag bolt assemblies preferred where possible in Sydney and Hunter

http://www.ausgrid.com.au/Common/Our-network/Standards-and-Guidelines/Network-standards.aspx



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Current standard Category P and Category V luminaires

• Cat P Luminaires:– 42W CFL. Comes standard with D2 PE cell

and lamp (S/C 180183)– 125W Mercury: Tender for replacement

currently being evaluated.

• Cat V Luminaires– Mercury luminaires not to be used in new

installations.

– 250W, 400W and 700W Mercury luminaires are replaced with 150W, 250W and 400W HPS respectively

• All luminaires should be installed with PE cell and attached to LV mains. Dedicated street lighting circuits progressively made redundant

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Rates• Ausgrid uses 3 rate systems

– Rate 1: Pole and luminaire funded and maintained by Ausgrid. Material from Ausgrid stock. Customer receives two monthly bills for maintenance (including capital) and energy costs.

– Rate 2: Pole and luminaire funded by customer and maintained by Ausgrid. Approved materials from external source or sourced through Ausgrid. Customer receives two monthly bills for maintenance and energy costs. Maintenance bill does not include any capital cost

– Rate 3: Pole and luminaire are not maintained by Ausgrid. Materials from external source (Not Ausgrid approved). Customer receives one bill for energy use.

• Ausgrid maintains luminaires via a Bulk Lamp Replacement (BLR). BLR costs are determined by the type and frequency of lamp replacement required to satisfy AS1158. These costs are determined by the Australian Energy Regulator (AER)

• Energy costs for all rates are determined by the Australian Energy Market Operator (AEMO) load tables.

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Decorative Luminaires

• Ausgrid is currently reviewing our standard range of decorative luminaires

• In order for decorative luminaires to be maintained by Ausgrid and be included in our BLR’s, it is required that:

– the item has suitable photometric characteristics (i.e suitable lumen maintenance)

– It is readily serviceable (Ability to change lamp without use of tools)

– uses durable components – there is assurance of ongoing availability of spare parts.– Is approved by Ausgrid

• If councils wish to use non-standard range these will have to be installed as a rate 3 and will not be maintained by Ausgrid

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New Technology

• LED Trials

– Tender awarded to 3 suppliers for category P LED luminaires

– Trial luminaires to be installed early 2012

– Simulation results show that P5 compliance can be achieved with as little as 26W

• Active Reactor

– Smart ballast that interrogates lamp to determine how much power is required to run lamp at 70% output.

Questions & Answers

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