RMU HV Switchgear

UNDERGROUND CONSTRUCTION MANUAL

HV SWITCHGEAR Go to SECTION INDEX Back to MAIN INDEX

DESCRIPTION DWG

INDEX

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31/5/11

62 5254 11��

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5229/1

5229/3

CONSTRUCTION CONSTRUCTION DESCRIPTION DWG

5234/1

5229/2

HARD COPYUNCONTROLLED

HV SWITCHGEAR

C. Noel

A. Bletchly

L. Burton

Construction code guide - Foundation & site finish

Construction code guide - 22kV Ring main unit

Construction code guide - 11kV Ring main unit

Location in council parklands

Location in council parklands 5234/2

Location in residential allotments 5233

5230

Outdoor RMU with precast concrete fdn -

Site finish concrete suround

5217

RING MAIN UNIT

5232/1

5232/2

Culvert Foundation details - Material

Culvert Foundation details - Construction

11RMU/ASL

5236/1

5236/2

ABB 11kV ring main unit Safelink - Material11RMU/O/ASL2S1F

11RMU/O/ASL2S2F

11RMU/O/ASL3S1F

11RMU/O/ASL3S

11RMU/O/ASL4S

ABB 11kV ring main unit Safelink -

Construction

Site preperation sloping site -

Maximum cut & fill

5237/1

5237/2

5238/1

5238/2

5253/1ABB 11kV Safeplus / Safering -

HV switchgear schematic

ABB 11kV Safeplus / Safering - Material

5243/1

5243/2

22RMU/O/FGA2S1F F & G 22kV ring main unit - Material

F & G 22kV ring main unit - Construction22RMU/O/FGA2S2F

22RMU/O/FGA3S1F

22RMU/O/FGA2S1CB

22RMU/O/FGA3S

22RMU/O/FGA4S

22RMU/O/FGA1S1CB1F

22RMU/O/FGA1S1CB2F

5252/1

5252/2

F & G 22kV ring main unit - Schematic

F & G 22kV ring main unit - Schematic

5252/3F & G 22kV ring main unit - Schematic

ABB 11kV Safelink - HV switchgear

schematic

ABB 11kV Safelink - HV switchgear

schematic

ABB 11kV Safeplus / Safering

Construction5255/1Ring main unit installation

5255/2Ring main unit installation



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Ergon Energy Corporation Ltd

ABN 50 087 646 062Dwg Sh

FILE: 5

UNDERGROUND DISTRIBUTION

5217

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� C.Lindsay

23/11/01

62 5217 1

SITE FINISH CONCRETE SURROUND

OUTDOOR RMU WITH PRECAST CONCRETE FDN

F

30

00

F

F 2800F

Concrete Edge

Beam

F

Fall

F

F

F

Fall

Fall

F

F

surround slab cast

F

Site

Boundary

(Level Site)

A_

PLAN

FO

OT

PA

TH

Alignment

R.P. Street

F

Reinforced concrete

around plinth

between plinth and

Abelflex sealant joint

concrete slab

NOTES:

2. Reinforced concrete surround slab:

a) 100/125mm thick slab:

b) 11 TM trench mesh reinforcement in centre of slab:

c) 25 MPa grade concrete:

d) Finish by wood float or by nylon broom.

4. The concrete slab is to slope away from plinth falling

at a slope of 1 in 25.

5. Cable apertures through the precast concrete plinth

shall be backfilled to 50mm from the top of plinth.

A 30mm deep layer of 1:16 ratio weak mix concrete

shall be placed to seal aperture.

6. The surface of the surround slab may be finished with

a stencil pattern surface to match the surrounding

pavements of the development. (Use Textcrete or

equivalent product. Construct to supplier’s specifications).

3. The top face of the concrete surround slab shall be

100mm Min. above the final surface level (when turf is laid).

Line

Ground

Finished

_SECTION A

Backfill

Cable Pit

Refer note 1.

F

Earth grid under

concrete edge beam

Fall

F

F

Fall

50 F

F

F

F10

0 M

in.

F

F

HV SWITCHGEAR

_SECTION B

Concrete edge

beam to perimeter

150 wide x 150

deep below

finished surface.Foundation

Finish

ground line

_B

F

C. Noel

A. Bletchly

F

Construction Type

11RMUF/ASL

Pre-cast foundation

1. Backfill Cable Pit with bedding sand and compact in place.

Refer TRENCHING Drawing No. 5227.

B 02.11.11

B

Refer Note 7

FF

F

7. Concrete slab to be cast in separate sections on side/s

where cables enter/exit to allow future access.

Provide ’Abelflex’ between sections and around plinth.


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ABN 50 087 646 062Dwg Sh

FILE: 5


EXAMPLE:-

CONSTRUCTIONSVOLTAGE

CONSTRUCTION CODE GUIDE

Code shown within dashed box

appears on relevant construction

detail drawings in this manual.A

522962 5229 1

T.Borg

11kV RING MAIN UNIT CONSTRUCTION CODE

11 RMU/O/ASL 2S1F

11 = 11kV RMU = Ring Main Unit

LOCATION

O = Outdoor

HV SWITCHGEAR

ASL = ABB SafeLink

ASP = ABB SafePlus

ASR = ABB SafeRing

CONFIGURATION

2S1F = 2 switch + 1 fuse


3S = 3 switch

4S = 4 switch


1S1CB1F = 1 switch + 1 circuit breaker + 1 fuse


2S1CB = 2 switch + 1 circuit breaker

11RMU/O/ASL2S1F = 11kV, Ring Main Unit, outdoor, ABB SafeLink, 2 switches + 1 fuse.

C. Noel

A. Bletchly

1

11kV RING MAIN UNIT

9/9/10HV SWITCHGEARHARD COPY

UNCONTROLLED�

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ABN 50 087 646 062Dwg Sh

FILE: 5



5229 262 5229 2

C. Noel

A. Bletchly�

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EXAMPLE:-

Required only where foundation

is not provided by others.




FOUNDATION AND SITE FINISH

3/5/11

RING MAIN UNIT FOUNDATION & SITE FINISH CONSTRUCTION CODE

11 RMUF / ASL

11 = 11kV

VOLTAGE RMU FOUNDATION

RMUF = Ring Main Unit Foundation

HV SWITCHGEAR

ASL = ABB Safelink

11RMUF/ASL = 11kV, Ring main unit foundation, ABB Safelink

L. Burton

HV SWITCHGEARHARD COPYUNCONTROLLED

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ABN 50 087 646 062Dwg Sh

FILE: 5


EXAMPLE:-

CONSTRUCTIONSVOLTAGE





5229 362 5229 3

T.Borg

22kV RING MAIN UNIT CONSTRUCTION CODE

22 RMU/O/FGA 3S1F

22 = 22kV RMU = Ring Main Unit

LOCATION

O = Outdoor

HV SWITCHGEAR CONFIGURATION


FGA = Felton & Guillaume (F&G) 1S1CB1F = 1 switch + 1 circuit breaker + 1 fuse


2S1CB = 2 switch + 1 circuit breaker


3S = 3 switch


4S = 4 switch

22RMU/O/FGA3S1F = 22kV, Ring Main Unit, outdoor, Felton and Guillaume (F&G), 3 switches + 1 fuse.

C. Noel

A. Bletchly�

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9/9/10HV SWITCHGEARHARD COPY

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ABN 50 087 646 062Dwg Sh

FILE: 5


FO

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NOTES:

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PLAN

L. Burton

MAXIMUM CUT & FILL

(shown dashed)

30

00

800

A_

FIL

L

100 M

AX

R.P. Street

Alignment

_

150 M

AX

CU

T

2800

SECTION A

2. Ergon Energy’s 3000mm x 2800mm (minimum) site

shall be levelled and surrounding area graded to ensure

NO PONDING of water occurs.

523062 5230 1

8.3.11SITE PREPARATION SLOPING SITE

Outline of RMU foundation over

1. Refer drawing 5226 for installation requirements.

3. No services other than the Ergon Energy’s electric cables

shall pass through this RMU site.

4. Clear access to the RMU shall be maintained for

Ergon Energy’s personnel & heavy equipment.

6. Mature landscaping (including trees, sprinklers etc) shall

not encroach onto the RMU site.

7. The finished surface of the adjacent footpath, in front

of the RMU cabinet, shall be level to ensure that

the cabinet doors will swing into the fully open position.

FF

F

F

F

F

F

F

F

F

F

FF

R.P. Street

Alignment

= =

==

Site

Boundary

F

5. After installation is complete the site surface is to be

finished with a concrete slab. (Refer drawing 5217).

HV SWITCHGEAR

A.Bletchly

C.Noel


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ABN 50 087 646 062Dwg Sh

FILE: 5


NOTES:

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1. Foundation design details are as follows:1

ASSY QTYDESCRIPTION

MATERIAL

1523262 5232 1

583-2 CulvertUnstable soils are soft clay to sandy gravel with a soil strength

50-150 kPa.

Stable soils are very stiff clay to shale/rock with soil strength of

150kPa or higher.

2. Lift the culvert separately with 4 x 1.3 tonnes

Reid Swiftlift lifting eyes.

3. Position the top face of the culvert at the finished ground level

of the site, as detailed on the Project’s Civil Construction drawings.

4. Do NOT remove the culvert end wall knockouts.

5. The culvert shall be constructed level. Under no circumstances

shall it be allowed to tilt forward towards the footpath.

7. Refer drawing No. 5217 for site finish concrete surround.

CULVERT FOUNDATION DETAILS

A. Bletchly

C. Noel

4/5/11

MATERIAL

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ABN 50 087 646 062Dwg Sh

FILE: 5


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�� L. Burton 523262 5232 1

8.3.11

C. Noel

A. Bletchly

F

_SECTION A

B_

=

=

A_

3000 S

ite

Compact pit sand

SECTION B_PLAN

Backfill with approved

suitable material and

compact in place

R.P. Street

Alignment

2800 SiteF

F

FF

FFF

F

Site

Boundary

F

Finished Ground

Line (Site)

Cable

entry

Assy 583-2

Footpath

F

Precast concrete

plinth supplied

with RMU

F

F

HV cables

F

F

F

F

F

Stable

Un-stable100

50

F

F

1180 S

table

12

80

Un

sta

ble

2

Construction Type

11RMU/ASL

F

F

F

F= =

CULVERT FOUNDATION DETAILS

CONSTRUCTION


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FILE: 5


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�� L. Burton 523362 5233 1

8/3/11

C. Noel

A. Bletchly

F

F

FO

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PA

TH

R.P. Street

Alignment

F

6000

F

F

30

00

NOTE:

Real Property Boundary

F

F2800

Dwelling

Dwelling

As

Req’d

As

Req’d

FF

FF

Ring main units

may be in 1 or 2

allotments

F

A reduction in dwelling setback

of 6000mm from the R.P. Street

Alignment will require relocation

of the ring main unit to an

alternative site to achieve

the acceptable separation.

LOCATION IN RESIDENTIAL ALLOTMENTS


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ABN 50 087 646 062Dwg Sh

FILE: 5


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�� L. Burton 523462 5234 1

C. Noel

A. Bletchly

10.3.11

NOTES:

Parklands

1.

2.

3.

2.5m Min.

2.5

m M

in.

4.

Apron

PLAN

Dwelling

Real Property

Boundary

1.5m

Min.

R.P. Street

Alignment

FOOTPATH

Kerb

ROAD2.0

m

F

F

F

F

F

F

F

F

F

F

F

F

F

F

Dwelling

1.5

m

Min

.

F

F

Site

Boundary

As Req’d

3.0m

Away from residential dwellings and surrounding

properties to minimise visual and sound impact;

As close as possible to the road kerb to allow 24 hour

all weather access for personnel, a coventional crane

and heavy equipment.

Refer

Note 4

Refer

Note 4

F

F

F

F

RMU SET BACK FROM R.P. STREET ALIGNMENT

When planting vegetation in parklands, ensure vegetation

does not encroach on the ring main unit site.

Take into consideration the fully matured size of vegetation

to allow continuing access to the site.

A ring main unit in parkland shall be located:

The location of ring main unit sites is based on acceptable

separation to adjacent dwellings located as shown.

Any reduction in the 1.5m minimum dimension shown on

the drawings requires a corresponding relocation of the

ring main unit site to maintain the acceptable separation.

LOCATION IN COUNCIL PARKLANDS

A 3.0m wide cable and access easement or road reserve

shall be provided between the ring main unit site and the

R.P. Street Alignment.

1

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ABN 50 087 646 062Dwg Sh

FILE: 5


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�� L. Burton 523462 5234 2

C. Noel

A. Bletchly

10.3.11

FOOTPATH

ROAD

Parklands

Kerb

PLAN

Dwelling

R.P. Street

Alignment

6.0m Min.

F

Site

Boundary

F

F

F

F

F

As Req’d


FOOTPATH

ROAD

Parklands

Kerb

PLAN

Dwelling

F

Site

BoundaryF

F

F

F

F


Less than

6.0m2.5m Min.

F

F

1.5m

Min.

F

F

Refer Note 4

Sheet 1.

R.P. Street

Alignment

RMU ADJOINING R.P. STREET ALIGNMENT

LOCATION IN COUNCIL PARKLANDS

2


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FILE: 5


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ASSY DESCRIPTIONQTY

NOTES:

10/3/11

567-9

62 5236 15236

C. Noel

A. Bletchly

567-1

567-5

567-3

567-7

555-4

555-5

555-7

555-8

555-9

555-10

11kV ABB safelink 2 switch 1 fuse c/w cubical and plinth



11kV ABB safelink 3 switch c/w cubical and plinth

11kV ABB safelink 4 switch c/w cubical and plinth

1

2S1F 2S2F 3S1F3S 4S

1.

2.

The gland plates supplied with the units are not

required to be fitted on the ground mounted RMU

3.

The HV cables must be clamped to the unistrut

provided as per construction standards and the

opening on the plinth for cable entry must be

filled with a weak concrete mix and compacted

MATERIAL - FREESTANDING RING MAIN UNIT

ASSY DESCRIPTION QTY

3

1

1

1

1

1

MATERIAL

MATERIAL - HV FUSE - EACH CIRCUIT

Refer note 1

555-2 Cartridge fuse link 10A HRC

Cartridge fuse link 20A HRC






Designer to nominate HV fuse link current rating

CONTRACT No. 2008 / 024 / T

ABB 11kV RING MAIN UNIT SAFELINK

HV SWITCHGEARB 24.11.11

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B

4.

Designer to nominate the position(s) of the outgoing

cable circuits (Refer dwg 5237 for schematic)

as follows:

* Radial feeders - switch disconnector(s) provided

with CFI unit(s)

* Ring feeders - determine the circuit arrangement

in consultation with system operations staff.


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ABN 50 087 646 062Dwg Sh

FILE: 5


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L. Burton

10/3/11HARD COPYUNCONTROLLED

62 5236 25236

C. Noel

A. Bletchly


2

Construction Type

11RMU/O/ASL2S1F

11RMU/O/ASL2S2F

11RMU/O/ASL3S

11RMU/O/ASL3S1F

11RMU/O/ASL4S

Assy Selection

567-1 to 9 and

555-2 to 10

F

F

F

Concrete plinth

F

Refer HV CONSTRUCTION

drawing no. 5244 or 5245

for feeder cable connections

Side View Plan

F

Lifting points

4 x M12 ferrules

Lifting points

4 x M12 ferrules

CONSTRUCTION

ABB 11kV RING MAIN UNIT SAFELINK

HV SWITCHGEAR�

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ABN 50 087 646 062Dwg Sh

FILE: 5


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L. Burton


62 5237 15237

C. Noel

A. Bletchly

FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

F

2S1F 11kV ABB safelink RMU 2 switch 1 fuse

F

Note:

(CFI) on this switch disconnector unit

Represents circuit fault indicator

FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

F


F

Note:



FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

F


FEEDER

CABLE

F

F

Note:



1

ABB 11kV SAFELINK - HV SWITCHGEAR

SCHEMATIC

HV SWITCHGEAR

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ABN 50 087 646 062Dwg Sh

FILE: 5


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L. Burton

10/3/11

62 5237 25237

C. Noel

A. Bletchly

FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

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2

F

FEEDER

CABLE

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FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

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F

4S 11kV ABB safelink RMU 4 switch 3S 11kV ABB safelink RMU 3 switch

ABB 11kV SAFELINK - HV SWITCHGEAR

SCHEMATIC


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ABN 50 087 646 062Dwg Sh

FILE: 5


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L. Burton62 5238 1

5238

C. Noel

A. Bletchly

ASSY DESCRIPTIONQTY

NOTES:

578-1

578-5

578-3

1

1.


For circuit breaker setting refer to protection.

1S1CB1F 1S1CB2F 2S1CB

1

1

MATERIAL

9/5/11

1

11kV ABB safeplus RMU 1 switch 1 circuit breaker 1 fuse c/w cubical and plinth

11kV ABB safeplus RMU 1 switch 1 circuit breaker 2 fuse c/w cubical and plinth

11kV ABB safering 2 switch 1 curcuit breaker c/w cubical and plinth

ABB 11kV SAFEPLUS / SAFERING


B

2. Designer to nominate the position(s) of the outgoing cable circuits (Refer dwg 5253 for schematic) as follows:* Radial feeders - switch disconnector(s) provided with CFI unit(s)* Ring feeders - determine the circuit arrangement in consultation with system operations staff.

HARD COPYUNCONTROLLED�

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ABN 50 087 646 062Dwg Sh

FILE: 5


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62 5238 25238

C. Noel

A. Bletchly

9/5/11

2

CONSTRUCTION

Assy Selection

578-1, 3 or 5F

Lifting point

F

Lifting point

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Lifting point

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ABN 50 087 646 062Dwg Sh

FILE: 5


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L. Burton

ASSY DESCRIPTIONQTY

16/3/11

579-9

62 5243 15243

C. Noel

A. Bletchly

579-1

579-5

579-3

579-7

579-11

1

2S1F 2S2F 3S1F3S 4S



CONSTRUCTION

22kV F&G 2 switch 1 fuse c/w cubical & plinth

579-13

579-15



22kV F&G 3 switch c/w cubical & plinth

22kV F&G 4 switch

22kV F&G 1 switch 1 circuit breaker 1 fuse c/w cubical & plinth

22kV F&G 1 switch 1 circuit breaker 2 fuse c/w cubical & plinth

22kV F&G 2 switch 1 circuit breaker c/w cubical & plinth

1S1CB1F 1S1CB2F 2S1CB

1

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1

1

1

NOTE:

1.

1

Designer to nominate HV fuse links

F&G 22kV

2. For circuit breakers refer to protection for setting

556-3

556-4

556-7

Cartridge fuse link 16A



3 6 3 3 6

QTY

2S1F 2S2F 3S1F3S 4S 1S1CB1F 1S1CB2F 2S1CBASSY DESCRIPTION

MATERIAL - HV FUSE - EACH CIRCUIT


B

Designer to nominate the position(s) of the outgoing

cable circuits (Refer dwg 5252 for schematic)

as follows:

* Radial feeders - switch disconnector(s) provided

with CFI unit(s)

* Ring feeders - determine the circuit arrangement

in consultation with system operations staff.

3.


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ABN 50 087 646 062Dwg Sh

FILE: 5


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L. Burton


62 5243 25243

C. Noel

A. Bletchly

HV SWITCHGEAR

F&G 22kV RING MAIN UNIT


Construction Type

CONSTRUCTION

22RMU/O/FGA2S1F

22RMU/O/FGA2S2F

22RMU/O/FGA3S1F

22RMU/O/FGA2S1CB

22RMU/O/FGA3S

22RMU/O/FGA4S

22RMU/O/FGA1S1CB1F

22RMU/O/FGA1S1CB2F

Assy Selection

579-1 to 15 and

556-3 to 7

F

Refer HV CONSTRUCTION

drawing no. 5044 for feeder

cable connection

2

9/5/11

Lifting point

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F

Lifting point

Lifting point

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ABN 50 087 646 062Dwg Sh

FILE: 5


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62 5252 15252

C. Noel

A. Bletchly

HV SWITCHGEAR

FEEDER

CABLE

FEEDER

CABLE

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CABLE

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FEEDER

CABLE

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CABLE

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CABLE

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FEEDER

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CABLE

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CABLE

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CABLE

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CABLE

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1

SCHEMATIC

9/5/11F & G 22kV RING MAIN UNIT

2S1F 22kV F & G

ring main unit

2 switch, 1 fuse

2S2F 22kV F & G

ring main unit

2 switch, 2 fuse

3S1F 22kV F & G

ring main unit

3 switch, 1 fuse

F F F

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ABN 50 087 646 062Dwg Sh

FILE: 5


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62 5252 25252

C. Noel

A. Bletchly

HV SWITCHGEAR

FEEDER

CABLE

FEEDER

CABLE

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CABLE

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2

FEEDER

CABLE

FEEDER

CABLE

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CABLE

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CABLE

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SCHEMATIC

F & G 22kV RING MAIN UNIT

4S 22kV F & G

ring main unit

4 switch

3S 22kV F & G

ring main unit

3 switch

F F F F

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ABN 50 087 646 062Dwg Sh

FILE: 5


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L. Burton


62 5252 35252

C. Noel

A. Bletchly

HV SWITCHGEAR

F & G 22kV HV SWITCHGEAR

FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

F

Note:


Represents circuit fault indicator F

Note:



Note:


F

FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

F F

FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

3

9/5/11

1S1CB1F 22kV F & G

ring main unit

1 switch, 1 circuit breaker, 1 fuse


1S1CB2F 22kV F & G

ring main unit


2S1CB 22kV F & G

ring main unit

2 switch, 1 circuit breaker

SCHEMATIC

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ABN 50 087 646 062Dwg Sh

FILE: 5


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62 5253 15253

C. Noel

A. Bletchly

HV SWITCHGEAR

FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

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Note:



Note:


F

FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

F F

FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

FEEDER

CABLE

1

9/5/11


HV SWITCHGEAR - SCHEMATIC

1S1CB1F 11kV ABB Safeplus

ring main unit


1S1CB2F 11kV ABB Safeplus

ring main unit


2S1CB 11kV ABB Safering

ring main unit

2 switch, 1 circuit breaker


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ABN 50 087 646 062Dwg Sh

FILE: 5


1 SITE

INSTALLATION

General1.1

Stable (soil conditions)

Free from steep batters

Flood free

Level (topography) where possible

1.4

1.2

1

1/6/11

Site Size

1.3

URD

Along coastal areas the site must be located as far as possible

from the shoreline and sheltered from salt spray.

Common earthing sites

Level sites - 3000mm width x 2800mm depth.

Retaining wall sites - 3400mm width x 3000mm depth.

The site shall be to the satisfaction of Ergon Energy, including

A site should not be located where impact by traffic is likely and,

if at a truncated section of the street alignment or other non-regular

shaped site the following shall apply:

The specified rectangular size of the site shall not be reduced.

a) In the Road Reserve:-

The Developer shall obtain all necessary approvals from the

Department of Transport or the Local Authority.

b) On Freehold property (including residential or parkland):-

The Developer shall provide Ergon Energy with a registered

easement at no cost to Ergon Energy.


L. Burton

A. Bletchly

C. Noel

62 5255 15255

HV SWITCHGEAR

RING MAIN UNIT

The minimum area required to accommodate a ring main unit

shall be:

Ring Main Unit Orientation

The developer shall provide a ring main unit site(s) as

required by Ergon Energy at no cost to Ergon Energy. The site shall

be included in the road reserve, or located on freehold property.

No ring main units are to be located in Trustee Reserves.

Where the developer required the ring main unit to be included:

Acceptable separation of ring main unit to adjacent dwellings is

provided if the front of dwellings are set back 6.0m from the R.P.

Street Alignment and the padmount is located as shown in

drawings No. 5233, 5234 Sheets 1 or 2.

Developments including streets where the allowable dwelling set

back is less than 6.0m will require ring main unit siting on either an

alternative street, where the dwelling set back is 6.0m, or in Parklands.

RING MAIN UNIT INSTALLATION

Free from other services

The front edge of the ring main unit shall be as near to

parallel as possible to the R.P. Street Alignment.

Ring main units shall be oriented such that the HV panels

are easily accessible from the dedicated footpath.

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ABN 50 087 646 062Dwg Sh

FILE: 5


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2

1 SITE

1.5

(CONT’D)

Commercial and Industrial or Landscaped Areas

1.6 Parklands - for other than URD

1.7

Cabling Only

Cabling and Access

2 SITE PREPARATION

Sites shall be prepared in accordance with the included

construction drawings.

3 CONSTRUCTION OF RETAINING WALLS

4

4.1 Uniculvert

Cabling and Access Requirement

A 3.0m wide easement, or road reserve, from the front of

the site is required for cabling and access.

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62 5255 25255

HV SWITCHGEAR

INSTALLATION

RING MAIN UNIT

1/6/11

C. Noel

A. Bletchly

L. Burton

Whether the ring main unit is for the sole use of that

complex, or is required as part of the distribution network, the

owner is required to grant Ergon Energy an easement for the

ring main unit site, access and cabling.

Obtain the necessary approval for an easement to accommodate

the ring main unit, cabling and access to site.

Acceptable separation of ring main unit to adjacent dwellings is

shown in drawings No. 5234 Sheets 1 & 2.

Should the cabling route not be available in conjunction with

access, a 1.0m wide cable easement is required to the front

of the ring main unit. Additionally 2.0m x 3.0m (ring main unit

site width) is required immediately in front to allow spreading of

cables for entry to the ring main unit and also include the buried

earth cable.

Retaining walls shall be constructed around the perimeter of a

ring main unit site where:

A change in ground level of 300mm or more occurs within 2.0m

of the boundary of the ring main unit site.

RING MAIN UNIT FOUNDATION

Separation of 5.0m between ring main unit and the

nearest room or habitable area should be provided

where possible.

Uniculvert foundations shall not be constructed where site and

ground conditions do not provide an even or equal bearing

capacity for the ring main unit.

Uniculvert foundations for stable soil conditions shall

be constructed in accordance with Drawing No. 5232.


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ABN 50 087 646 062Dwg Sh

FILE: 5


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INSTALLATION

3

4 (CONT’D)

Unstable Sites

Where sites are very unstable, and conventional foundation

construction techniques as described in this document cannot

be applied, a special design shall be required.

5 BACKFILLING AND FINAL SITE FINISH

5.1 Common Earthing Sites

6

6.1

ADDITIONAL REQUIREMENTS

Commercial and Industrial Installation

All backfill of the site must be compacted before final site finish in

accordance with the applicable drawing.

Easy access for a mobile crane must be available for the purpose of

installation or replacement.

Ergon Energy cable conduits for the development may be placed in

the substation site and shall pass down the sides of the uniculvert

foundation. No conduits shall pass through or under the uniculvert

foundation. Conduits shall be 750mm minimum depth below the

finished surface level. The substation site surface is to be finished

with a concrete slab (refer to drawing No. 5004). The 2.0m apron in

front of the substation cabinet shall be finished with a concrete slab

sectioned with construction joints for ease of future removal.

6.2

An additional 2.0m apron shall be provided in front of, and for the

full width of the site (ie 4.8m depth). This will provide a safe

working platform and access around latched open doors for

emergency operations.

C. Noel

A. Bletchly

1/6/11

L. Burton 26 5255 35255

RING MAIN UNIT FOUNDATION

In such circumstances, the developer shall obtain a certified

design from a Civil Engineer (RPEQ) for Ergon Energy’s

consideration. No special designs for ring main unit

foundation construction shall be used without the approval of

Ergon Energy.

The preferred location of ring main unit sites at

commercial and industrial developments is at the real property

street alignment. Switchgear cabinet doors shall face the

adjoining footpath.

Ring main units shall be located on the development in

areas where clear, all weather access is provided for personnel

and heavy equipment at all times.

Ring Main Units in Landscaped Areas

Where the ring main unit is located in a landscaped

area (gardens) the following shall apply:

The ring main unit site surface is to be finished with a concrete slab

(refer to drawing No. 5217).

The 2.0m apron in front of the ring main unit site shall be finished with

a concrete slab sectioned with construction joints for ease of future

removal.

HV SWITCHGEAR

RING MAIN UNIT

4.2

Sealing of the cable apertures in the precast concrete plinth

and construction of the concrete surround slab over the

ground surface shall be in accordance with drawing No. 5217.

Should the site be located in restricted areas such as carparks

and between buildings, an additional minimum 2.0m of clear

access shall be provided in front of, and for the full width of

the site (ie 4.8m depth). This will provide a safe working

platform and access around latched open doors for

emergency operations.


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�INSTALLATION

4

6.2 (CONT’D)

6.3

7

Ring Main Unit in Landscaped Areas

When planting vegetation in landscaped areas and gardens,

ensure vegetation does not encroach on the ring main unit

site. Take into consideration the fully matured size

of vegetation to allow continuing access to the site.

Ergon Energy cable conduits for the development may be

placed in the ring main unit site and shall pass down the sides

of the uniculvert foundation. No conduits shall pass through

or under the uniculvert foundation. Conduits shall be 750mm

minimum depth below the finished surface level.

Ring Main Units Installation in Parklands

Where the ring main unit is located in Council

Parklands, the installation shall be in accordance with the

requirements of drawing No. 5234 Sheets 1 or 2.

A 2.0m apron as specified in Clause 6.2 shall be provided.

No buildings/residences, fences, including their foundations, LV

switchboard earths, or metalic objects are permitted within the

clearance zone around the RING MAIN UNIT.

Clearance to Telstra assets shall be as noted on EARTHING

drawing No. 5221 Sheet 1.

62 5255 45255

HV SWITCHGEAR

RING MAIN UNIT

1/6/11

C. Noel

A. Bletchly

L. Burton

SPACING BETWEEN RING MAIN UNIT AND OTHER

METAL OBJECTS


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FILE: 5


RMU HV Switchgear

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