The University of Newcastle

Infrastructure and Facilities

Services
Installation Specification
High Voltage Substation
Specification

29th January 2021

Version 2.2
UON-ESS-113
 Revision Record

Version Date Description Prepared by: Checked by: Approved by:

Draft 05/02/2019 Issued for Approval R.Eyre Tim Fox R.Eyre

1 26/03/2019 Released R Eyre Tim Fox R.Eyre

2 25/06/2019 Revised Sections R Eyre D Batzke R.Eyre

Revised Sections 4.5, 4.7,
2.1 21/01/2020 4.8, 7, 9. R Eyre Tim Fox Mark Mazzitello

Revised Sections 5, 10,

2.2 29/01/2021 11, 13. R Eyre Tim Fox Andrew Bull
Contents
1. INTRODUCTION .........................................................................................................................................4
2. STANDARDS, SPECIFICATIONS AND STATUTORY OBLIGATIONS .................................................................4
3. BACKGROUND ...........................................................................................................................................6
4. SCOPE ........................................................................................................................................................6
5. SUBSTATION BUILDING .............................................................................................................................6
5.1. Access .......................................................................................................................................6
5.2. Layout and Facilities ..................................................................................................................7
5.3. Lighting and Small Power ..........................................................................................................7
5.4. Connection to UON Network .....................................................................................................8
5.5. EMF ...........................................................................................................................................8
6. TRANSFORMERS ........................................................................................................................................8
6.1. General ......................................................................................................................................8
6.2. Electrical Specification ..............................................................................................................9
6.3. Miscellaneous fittings ................................................................................................................9
6.4. Oil containment bund ................................................................................................................9
7. SWITCHGEAR .............................................................................................................................................9
8. POWER FACTOR CORRECTION ................................................................................................................. 10
9. METERING ............................................................................................................................................... 10
9.1. High Voltage Metering .............................................................................................................10
9.2. Low Voltage Metering ..............................................................................................................11
Building Main Switchboard ..................................................................................................................11
9.3. Distribution Boards ..................................................................................................................12
10. REMOTE MONITORING ....................................................................................................................... 14
10.1. EMS Network Configuration and Topology .............................................................................15
11. ALARMING .......................................................................................................................................... 16
12. VENTILATION ...................................................................................................................................... 17
13. EARTHING ........................................................................................................................................... 17
14. ANCILLARY EQUIPMENT ...................................................................................................................... 17
15. TESTING .............................................................................................................................................. 17
16. DRAWINGS AND DOCUMENTATION .................................................................................................... 18
17. DEFECT LIABILITY PERIOD .................................................................................................................... 18
18. MISCELLANEOUS ................................................................................................................................. 18

University of Newcastle Specification UON-ESS-113

High Voltage Substation Specification – Version 2.2
1. Introduction
This specification covers the general requirements applicable to the design, manufacture,
installation performance and delivery of electrical substations at the UON (University of Newcastle).

It is not the intention to specify details of design and construction except where necessary to
establish performance requirements, nor is it the intention to set forth those performance
requirements which are adequately specified by the applicable standards.

This specification shall be read in conjunction with Standard Specification UON-ESS-101 General
Electrical Specification.

2. Standards, Specifications and Statutory Obligations

All aspects of design, manufacture, testing, supply, plant, equipment, accessories, materials,
construction, erection, installation, operation and performance shall comply with this specification
and the current issue of the relevant Australian Standards, the relevant International Standards, the
UON Standard Specifications and Preferred Equipment List, as well as all Statutory Acts, Codes,
Regulations and Requirements of the relevant Authorities having jurisdiction over them unless
specified otherwise within this Specification.

These shall include but not be limited to:

Australian/International Standards
AS 3000 Wiring Rules
AS 2374 Power Transformers
AS 3010 Electrical Installations
AS 1768 Lightning Protection
AS 2053 Conduits and fittings for electrical installations
AS 2629 Separable insulated connectors for power distribution systems above
1kV
AS 2978 Insulating mats for electrical purposes
AS 3017 Electrical installations – Testing and inspection guidelines
AS 3731 Stationary Batteries - Nickel-cadmium
AS 4029 Stationary Batteries – Lead-acid
AS 4044 Battery chargers for stationary batteries
AS 1243 Voltage transformers for measurement and protection
AS 1265 Bushings for alternating voltages above 1000 V
AS 1931 High-voltage test techniques
AS 2006 High voltage ac switchgear and controlgear – Circuit breakers for
rated voltages above 1000 V
AS 2067 Switchgear assemblies and ancillary equipment for alternating
voltages above 1 kV
AS 2086 AC metal-enclosed switchgear and controlgear for rated voltages
above 1 kV and up to and including 72.5 kV
AS 2395 Terminals for switchgear assemblies for alternating voltages above 1
kV
AS 2650 Common specifications for high-voltage switchgear and controlgear
standards
AS 3132 Approval and test specification – Enclosures of insulating material for
switchgear and controlgear
AS 2732 Guide to the lightning impulse and switching impulse testing of power
transformers and reactors
AS 2067 Substations and High Voltage Installations exceeding 1kV AC
AS 5577 Electricity Network Safety Management Systems

University of Newcastle Specification UON-ESS-113 4|Page

High Voltage Substation Specification – Version 2.2
 ENA 15 Energy Network Australia - National Guideline for Prevention of
Unauthorised Access to Electricity Infrastructure
ENA 18 Energy Network Australia - Fire protection of Electricity Substations

University of Newcastle Standards

UON-ESS-101 General Electrical Specification

UON-ESS-102 Distribution Board Specification
UON-ESS-103 External Lighting Spec Draft final
UON-ESS-104 Emergency Escape Lighting and Illuminated Exit Signage
UON-ESS-105 Preferred equipment list
UON-ESS-106 Generators
UON-ESS-111 Interior Lighting and Control
UON-ESS-112 Main Switchboard Specification.
UON-DSS-001 CAD Drafting Standards

Authorities and Statutory Acts, Codes, Regulations and Requirements

Electricity Supply Act 1995 (NSW)

NSW Service and Installation Rules
National Electricity Rules
Electricity Supply (General) Regulation 2014 (NSW)
Electricity Supply (Safety and Network Management) Regulation 2014
Work Health and Safety Act 2011 and Regulation 2011

Where the stipulations of this specification, data sheets and drawings do not comply with the
minimum requirements of the Australian Standards or Statutory Regulations, the latter shall prevail.

Where the stipulations of this specification, the data sheets and the drawings are more exacting
than the minimum requirements of the Australian Standards and Statutory Regulations, the former
shall prevail in the following order:

a) Data sheets and detail drawings

b) Specification and standard drawings

University of Newcastle Specification UON-ESS-113 5|Page

High Voltage Substation Specification – Version 2.2
3. Background
The UON is different to most other power consumers. Apart from the larger quantities of power
used by the university, the power supplied to UON is High Voltage (11000V). The UON purchases
this higher voltage power and owns and operates its own High Voltage Network to distribute power
around campus.

The UON high voltage network is made up of 22 substations connected by approximately 4km of
underground cable over around 350 acres. The network is divided into four separate sections:
NIER, East Campus, West Campus and Accommodation. Each section has a separate Ausgrid
supply. West Campus also has a redundant supply. The Ausgrid supply enters the campus at
Substation 1, Substation 10, Substation 18 and Substation 19. Ausgrid’s Authority and
responsibilities end at the above four substations.

4. Scope
This specification is intended as instruction for the design, supply and installation of Electrical
Substations and associated equipment at the University of Newcastle. This is not a comprehensive
specification, this specification covers the design, supply and installation preferences and the
unique requirements that are associated with an installation at the University of Newcastle. Areas
not covered by this specification should be completed as per Australian Standard, to industry best
practice and in a ‘tradesman like manner.

5. Substation Building

5.1. Access
Building access shall be designed to facilitate the movement of equipment, personnel and
associated vehicles.

Personnel entry doors must have internal pushbars to exit and default to the locked condition when
closed. All personnel doors shall be fitted with door closers. All personnel entry doors shall be
fitting with a UON HV1 keyed lock for access to High Voltage Areas and a UON HV2 keyed lock for
Low voltage area access. In addition to Personnel entry doors, all substations shall have double
entry doors large enough to accommodate the largest piece of equipment housed in that substation.
The double door access shall have a landing immediately outside the opening capable of receiving
the largest piece of equipment housed in that substation. If this landing is higher than the
surrounding area by more than 225mm, a removable or gated handrail shall be installed. The
double doors shall NOT utilise an internal pushbar for opening. There shall be no way of opening
the double doors externally. Standard door bold shall be used to secure the double doors internally.

If a substation is directly connected to the Ausgrid network such as Sub 1, Sub 10, Sub 18 or Sub
19 all High Voltage personnel doors shall be fitted with dual locking allowing access using both the
UON HV1 key and the Ausgrid Substation Access key.

All substations shall have paved vehicle access with car parking for a minimum of two standard size
vehicles. Paved Vehicle access shall give direct access to the substation double entry doors. The
double door vehicle access can be used to satisfy the car parking requirements. Signage shall be
installed in front of the double door access stating “No Stopping High Voltage Substation access
only”.

UoN bushfire clearances must be adhered to when choosing the substation location.

University of Newcastle Specification UON-ESS-113 6|Page

High Voltage Substation Specification – Version 2.2
 5.2. Layout and Facilities
Equipment within the substation shall be positioned to allow maintenance access to removable
panel. Effort should be made to keep the area directly in front of the High Voltage switchgear clear.
A minimum of 1.2 meters between the High Voltage switchgear front panel and adjacent equipment
should be maintained all times.

There shall be a minimum separation distance of 1 meter between transformers or transformer

components.

The battery charger controls/interface shall be at a height of at least one meter from the floor to
allow access by the user.

Remote switching interface shall be housed in the LV section of the substation and a minimum of
1.2 meters from the substation floor.

All HV or LV switching tools shall be mounted on a tool board showing the outline of the tool to
facilitate relocation. HV tools shall be mounted with purpose made proprietary mounting brackets.

Both LV and HV sides of the substation shall have tag holder mounted on the wall to house
equipment tags. Each tag holder shall accommodate three different types of tags, with room to
store 20 of each type.

The HV side of the substation shall have a locker for the purpose of housing protective clothing.
This locker shall be a minimum of 1800mm height to allow hanging and storage of full body
protective suites. The lockers shall be capable of housing two suites. Storage shall also be
provided for High voltage test equipment, safety equipment, earthing cable and other associated
equipment. All equipment and safety lockers shall be reasonably sealed to prevent dust ingress.

Within the HV side of the substation, a surface shall be provided for the reading of drawings and
filling out of switching permits. This surface area shall be at least 1200mm x 600mm. Ideally, this
surface would be a drawing board attached to the wall. A full sets of A3 size drawings shall be
provided in protective sleeves housed in a folder for both the HV and LV sections of the substation.

Signage as per the NSW Service and Installation rules shall be installed in each substation.
Network drawings shall be A2, framed, protected by glass or Perspex (or similar) and capable of
being changed when drawing updates are required.

5.3. Lighting and Small Power

All lighting and small power is to be installed as per relevant UON Electrical Specification UON-
ESS-111 Interior Lighting and Control. A distribution board shall be installed in each substation to
control lighting and small power within the substation and external lighting. The substation may
also supply lighting for roads and walkways in the general area of the substation.

At least one GPO for every eight lineal meters of wall shall be provided within both the LV and HV
sides of the substation. GPO’s shall be heavy duty type (Clipsal 56 series or similar).

Lighting within the substation shall not be mounted above equipment or in such a way that it cannot
be accessed from a step ladder on level ground. Light levels within the substation shall be between
160 – 400 Lux. Any glass tubes or bulbs within the light fitting shall be completely enclosed for
mechanical protection and to capture debris in the event of breakage. Lighting shall be directly
switched using two way switching, one switch at each personnel door. All switches and electrical
outlets shall be heavy duty type (Clipsal 56 series or similar).

If emergency escape light and exists signs are required by the NCC, they shall be installed as per
AS 2293. If emergency escape lighting and exit signs are not required by the NCC, Emergency

University of Newcastle Specification UON-ESS-113 7|Page

High Voltage Substation Specification – Version 2.2
 escape lighting only shall be installed. Emergency escape lighting in substation need not be
connected to a monitoring system.

If the substation is of a size that required emergency escape lighting and exit signs such lighting
shall be installed as per AS2293. If emergency escape lighting and exit signs are not required by
the NCC, emergency escape lighting only shall be installed. Location of this lighting shall be as per
AS2293 requirements. Emergency escape lighting in substation need not be connected to a
monitored system.

External lights shall be provided above all entry and exit doors. The remainder of the substation
perimeter shall be maintained at P2 light levels. External lighting shall be controlled by a PE cell.

5.4. Connection to UON Network

All substations shall include at least one wireless access point and two Copper (RJ45) connections
accessing the UON network.

5.5. EMF
In some situations, site selection of the substation may also be important in reducing EMF. EMF
shielding may be required in some circumstances. A substation shall not be located adjacent to,
above, or below operating theatres or similar areas where sensitive instrumentation are to be
installed. (Refer also to AS/NZS 3003:2011 Electrical installations - Patient areas).

6. Transformers

6.1. General
Transformers in Chamber Substations shall be

• Designed for a minimum 50 year life

• Indoor oil immersed and sealed
• Not be pressurised
• Incorporate no gases other than air
• Utilise ONAN cooling
• Fitted with Air Insulated cable boxes
• Mounted on Bi-directional rollers
• Contain copper windings
• Storm Grey
• HV Bottom entry/LV top entry
• Sound less than 80dB @ 1 meter
• Mineral Oil insulated
• Jacked off rollers and bolted down once into position
• Fitted with lifting lugs
• Cores constructed with non-aging transformer steel
• HV and LV cables supported to take load of cable glands and terminations
• Contain less than 1ppm PCBs

Transformer spaces must be separated from other transformers, walls, other equipment, pit edges
or obstructions by at least 1000 mm.

All conduits must be clear of the path required for installation or removal of any transformer.
Transformers must not be placed directly under ventilation duct openings.

University of Newcastle Specification UON-ESS-113 8|Page

High Voltage Substation Specification – Version 2.2
 6.2. Electrical Specification
• Phases 3
• Vector connection Dyn11
• Frequency 50 Hz
• Rated primary voltage 11 kV
• Rated no-load secondary voltage 433 V
• Include Offline Tap Changer
• All control wiring will be ferruled with wire numbers and terminated into IP54 marshalling
enclosure that is accessible from floor level
• Come with a complete set or control wiring diagrams

6.3. Miscellaneous fittings

• Pressure Relief Valve complete with protection trip relay

• Provide a suitable stainless steel earthing stud M12 x 40 long complete with stainless
steel nuts and washers on the transformer frame for earthing the unit
• All control/monitoring to be factory wired to an accessible terminal strip, mounted within an
IP54 cubicle on the transformer
• Oil filling hole and cap
• Oil level indicator (clear glass)
• Oil drain valve with threaded steel plug
• Nameplate as per AS 60076.1 Section 7 & AS 60076.11 Section 9
• Include statement confirming that transformer complies with AS2374.1.2 (Minimum
Energy Performance Standard)

6.4. Oil containment bund

An oil containment system shall be provided in accordance with AS 2067. Bunded areas and Bund
walls shall be of reinforced concrete. Suitable construction/control joints (including water stops as
necessary) shall be installed to prevent bund cracking.

7. Switchgear
The University of Newcastle uses Schneider Premset High Voltage Circuit breakers with Sepam
Protection Relays. If the Circuit breaker is located at either end of a section of the High Voltage
ring, translay differential protection shall also be installed.

The position of the actual equipment, primary and earthing contacts within the switchgear shall be
capable of being visually verified via viewing windows. Lighting shall be included to ensure that
mechanisms can be clearly seen by the operator through the viewing windows.

All High Voltage circuit breaker installations shall include a remote panel to allow the switchgear to
be operated from outside the room housing the switchgear. Unless otherwise advised by the
University, this remote panel shall be located in the adjacent Low Voltage switch room.

Switchgear status shall be displayed on the remote operating panel and within Power Studio. All
networking and configuration required to display the switchgear status on Power Studio shall be
included in any installation proposal. A third party provider is to be used to configure Power Studio.

University of Newcastle Specification UON-ESS-113 9|Page

High Voltage Substation Specification – Version 2.2
8. Power Factor Correction
Power Factor Correction shall be provided in all substations directly connected to the Ausgrid
network.

If the PFC unit faults or if the Power Factor goes below .95 an alarm shall be initiated.

9. Metering
Below is the metering strategy for the power reticulation at UON.

9.1. High Voltage Metering

High Voltage incomers
Any High Voltage feeder that is directly connected to the Ausgrid network will have two meters
monitor power and energy usage in addition to the Ausgrid revenue meter.

The first meter shall be a PM5350 meter that is used to audit billing from the UON Electricity
Provider. This meter will be mounted in a separate enclosure within the Low Voltage section of the
Substation. The energy usage data from this meter also needs to be collected and displayed within
Power Studio. The above meter installation must include all networking and configuration required
to compile this information within Power Studio.

In addition to the PM5350, the Sepam unit within the High Voltage switchgear shall be used to
provide additional information on the High Voltage installation. Below is a list of information that
shall be extracted from the Sepam unit and displayed within Power Studio:

• Voltage, Line and Phase

• Phase Currents
• Frequency
• P,Q and S Power
• Power Factor
• Energy usage
• Peak Demand (current)

Any installation of the above Sepam meter must include all networking and configuration required to
compile and display this information within Power Studio. A third party provider to be used to
configure Power Studio.

High Voltage Feeders

High voltage circuit breakers that are not directly connected the Ausgrid network will utilise the
Sepam protection relay to monitor network conditions. Below is a list of information that shall be
extracted from the Sepam unit and displayed within Power Studio for each High Voltage
feeder/circuit breaker.

• Voltage, Line and Phase

• Phase Currents
• Frequency
• P,Q and S Power
• Power Factor
• Energy usage
• Peak Demand (Current)

Any installation of the above Sepam meter must include all networking and configuration required to
compile and display the information listed above within Power Studio. A third party provider to be
used to configure Power Studio.

University of Newcastle Specification UON-ESS-113 10 | P a g e

High Voltage Substation Specification – Version 2.2
9.2. Low Voltage Metering
Low Voltage Substation
All inputs to the Low Voltage substation switchboards shall be metered using a PM5350. This
switchboard is typically directly connected to the Substation transformer and supplies power to the
main switchboards located in each separate building.

All feeds originating at the Low Voltage Substation Switchboard shall be metered using PM5350.

Meters are not to be mounted in functional units or and other part of the switchboard. These meters
shall be housed in a purpose built enclosure within the Low Voltage Section of the substation. High
Voltage and Low Voltage metering can be mounted within the same enclosure if clearly marked with
“High Voltage Metering” and “Low Voltage Metering”.

Below is a list of information that shall be extracted from the PM5350 meters attached to the Low
Voltage Substation switchboard and displayed within Power Studio.

• Voltage, Line and Phase

• Phase Currents
• Frequency
• P,Q and S Power
• Power Factor
• Energy usage
• Peak Demand (Current)

Any installation of the above meters on a Low Voltage Substation switchboard must include all
networking and configuration required to compile and display the information listed above within
Power Studio. A third party provider to be used to configure Power Studio.

Building Main Switchboard

All feeds originating at the Building Main Switchboard shall be metered using PM5350.

Main switchboard meters should be housed separate to the switchboard. Meters are not to be
mounted in functional units or and other part of the switchboard. Meters should be housed in a
separate designated enclosure.

Below is a list of information that shall be extracted from the PM5350 meters attached to the Main
Switchboard and displayed within Power Studio.

• Voltage, Line and Phase

• Phase Currents
• Frequency
• P,Q and S Power
• Power Factor
• Energy usage
• Peak Demand (Current)

Any installation of the above meters on a Main switchboard must include all networking and
configuration required to compile and display the information listed above within Power Studio.

Third party provider to be used to configure Power Studio.

Additional metering may be required downstream of the Main Switchboard if the function unit within
the Main Switchboard supplies a Mechanical Services Switchboard. The metering within the
Mechanical Services Switchboard will depend on the requirements of NCC Section J and the UON
Mechanical Engineer.

University of Newcastle Specification UON-ESS-113 11 | P a g e

High Voltage Substation Specification – Version 2.2
 9.3. Distribution Boards

All distribution boards shall have an individual Lighting and Power Meters. All power used by
devices connected to a Distribution Board shall be captured by metering within that board.

Meters within a DB shall be DIN mounted iEM3250 type. Access to the meter shall be maintained
with the DB escutcheon closed. Meters shall not be mounted on any removable or hinged panel.

Below is a list of information that shall be extracted from the Distribution Board iEM3250 meters and
displayed within Power Studio:

• Voltage, Line and Phase

• Phase Currents
• Frequency
• P,Q and S Power
• Power Factor
• Energy usage
• Peak Demand (Current)

Any installation of the above meters in a Distribution Board must include all networking and
configuration required to compile and display the information listed above in Power Studio. A third
party provider to be used to configure Power Studio.

Wiring of metering in remote panels shall done to UON standard and approved by the UON
Electrical Asset Engineer or Mechanical Asset Engineer.

Figure 1 below is for indicative purposes only, all private meter except DB metering shall be
mounted remotely of the switchboard.

University of Newcastle Specification UON-ESS-113 12 | P a g e

High Voltage Substation Specification – Version 2.2
 Figure 1

University of Newcastle Specification UON-ESS-113 13 | P a g e

High Voltage Substation Specification – Version 2.2
10. Remote Monitoring
All High Voltage installations shall include all networking, hardware and configuration to allow the
installation to be remotely monitored. This remote monitoring shall be done through Power Studio.

A page shall be completed for each substation that includes a single line diagram of the substation.
This diagram shall include High Voltage Circuit breakers, transformers, power factor correction
units, battery chargers and associated cabling.

The following equipment status information shall be included on each Substation Mimic or linked
page/popup:

• Switch room Over Temperature

• Transformer Over Temperature
• Transformer Oil Low Level
• HV Circuit Breaker Status
• HV Circuit breaker faults (Retrieved via Sepam)
• Transformer High Pressure.
• Power factor Correction status (Running/Fault)
• Battery Charge status (Running/Fault).
• Battery Charger Voltage

A change of state for each of the items above shall be logged in the Power Studio Event log

The following data shall also be displayed on the substation mimic page:

Each High Voltage Circuit Breaker shall include:

• Voltage, Line and Phase
• Phase Currents
• Frequency
• P,Q and S Power
• Power Factor
• Energy usage
• Peak Demand (Current)

Other information:
• Transformer Temperature
• Switch room Temperature

The majority of the above information can be obtained from the Sepam Unit.

The substation page shall also display Power Factor Correction data. This should include.

• Power Factor
• Equipment Status (e.g. Faulted, Running etc.)
• kVA’s in service

All Substation Mimic pages shall include a link to the Substation Low Voltage Switchboard that is
connected to the High Voltage Substation.

The Substation Low Voltage Switchboard mimic page shall display the following information for
each functional unit within the Substation Low Voltage switchboard:

• Voltage, Line and Phase

• Phase Currents
• Frequency

University of Newcastle Specification UON-ESS-113 14 | P a g e

High Voltage Substation Specification – Version 2.2
• P,Q and S Power
• Power Factor
• Energy usage
• Peak Demand (Current)

The label of the functional unit within the Substation Low Voltage Switchboard mimic shall be linked
to the Main switchboard page supplied by that functional unit. If the functional unit does not supply
a main switchboard or distribution board, no link is required.

The Main Switchboard page shall display the following information for each functional unit within the
Main Switchboard.

• Voltage, Line and Phase

• Phase Currents
• Frequency
• P,Q and S Power
• Power Factor
• Energy usage
• Peak Demand (Current)

The label of the functional unit within the Main Switchboard mimic shall be a link to the Metering of
the Distribution Board supplied by that functional unit. If the functional unit does not supply a
distribution board, no link is required.

Additional monitoring may be required downstream of a Main Switchboard if the function unit
supplies a Mechanical Services Switchboard. The monitoring of the Mechanical Services
Switchboard will depend on the requirements of NCC Section J and the UON Mechanical Engineer.

10.1. EMS Network Configuration and Topology

Schneider Electric PM5350 & IEM3250 power meters, IME gas & water meter pulse counters,
Schneider Electric Link 150 Modbus-Ethernet Gateways, Circutor Power Studio Scada Deluxe
energy monitoring software application running on server in UON data centre.

Daisy chained RS485 data cabling runs between meters to Link 150 gateway which has data cable
connected to UON network. Power Studio software extracts meter data via IP & Modbus references
and displays values graphically on GUI and displays graphs/reports/alarms of required information.

Remote facilities require optic fibre connectivity back to UON data network via either media
converter (single-multi port) OR small managed switch. Fibre at network end is patched direct into a
spare fibre port of the switch.

Gas & water meter pulses can be picked up in 3 different ways – i) wired into a PM5350 power
meter digital input and configured as pulse ii) wired to a dedicated RS485 modbus pulse counter iii)
collected via Halytech AMR base station with remote water-gas meter pulse wired to Halytech
battery wireless logger. Gas meter pulses also require an intrinsic safety barrier (Pepperl & Fuchs
or equal) between gas meter and pulse counter (unless Halytech wireless).

Modbus addressing is set per substation to reflect substation reference – eg Meter 1 at Sub 5 is set
to Modbus address 51. Baud rate 9600-8-N.

Figure 2 illustrates UON EMS network topology.

University of Newcastle Specification UON-ESS-113 15 | P a g e

High Voltage Substation Specification – Version 2.2
 Figure 2

11. Alarming
The following conditions shall be monitored by Cardax.

• Transformer over temperature

• Transformer over pressure
• HV Circuit breaker tripped
• 24V battery supply failed
• Room over temperature.
• Oil low level.
• Buckholtze relay (If applicable)
• PFC Fault
• Power Factor out of Spec (Below .95)

Any instance of the alarms below shall be displayed on Cardax as a “Common Alarm”. If the
condition remains for more than 60 seconds, the alarm shall be escalated to a “High Voltage Critical
Alarm”.

Each High Voltage installation shall include an alarm test point that facilitates the regular testing of a
High Voltage Common Alarm.

University of Newcastle Specification UON-ESS-113 16 | P a g e

High Voltage Substation Specification – Version 2.2
 Cardax configuration is to be completed by the UON preferred contractor. The above alarms shall
also be displayed individually within Power Studio. Third party provider shall be used to configure
Power Studio.

12. Ventilation
The substation shall be pressurized. The Intake fan shall be controlled by a Variable Speed Drive.
Speed shall be controlled base on room temperature. Ventilation fan shall be initiated at 25 and
turn off at 20 Degrees.

The air intake filter shall be pleated cardboard and disposable. The filter shall be changeable from
the exterior of the substation using a ladder on flat even ground. Access to the filter shall be
through a hinged door with SK lock, no tools shall be required when changing the filter.

The air relief vents shall utilize a pleated cardboard disposable Pre Filter. The filter shall be
changeable from the exterior of the substation using a ladder on flat even ground. Access to the
filter shall be through a hinged door with SK lock, no tools shall be required when changing the
filter.

Relief vents shall have manually adjustable louvers.

Intumescent fire dampers shall be used.

13. Earthing
The earthing system must comply with the requirements of NS116 Design Standards for Distribution
Equipment Earthing and NS113 Site Selection and Construction Design Requirement for Chamber
Substations. If an existing earthing system is to be reused verification of compliance to relevant
standards are to be presented to the UON representative prior to commencing work.

All cable entry ducts (including both used and unused ducts) are to be sealed to prevent water
entering the substation or spilled oil leaving the substation.

Earthing drawings shall be provided showing all conductors and electrodes. All conductor and
electrodes to be numbered, numbers to be reflected on drawings. Electrode pit shall have an
engraved stainless steel mechanically attached label with electrode number. The conductor shall
have a engraved S/S label attached with a stainless steel tie/band at the point it attaches to the
electrode and earth bar.

14. Ancillary Equipment

The substation shall also include a 24Vdc battery backup power supply to the High Voltage Circuit
breakers. The batteries shall allow autonomous operation for a minimum of 24 hours. The battery
charger controls/interface shall be at a height of at least one meter from the floor to allow access by
the user.

15. Testing
On completion of the electrical installation works, the installation contractor shall provide
certification in accordance with statutory authority (Ausgrid) requirements. This certification shall
confirm that all works have been inspected and tested and comply with regulations.

Copies of the compliance certification shall be included in the as installed documents.

Testing shall include mandatory and optional tests outlined in Section 6 of AS/NZS 3000 and
AS/NZS 3017, as applicable to the contract works.

University of Newcastle Specification UON-ESS-113 17 | P a g e

High Voltage Substation Specification – Version 2.2
 Certification shall be provided for those sections of the electrical installation, which require authority
or independent inspections, which may be inspected and certified by the installation contractor.

Any inspections or work shall only be undertaken by personnel with an approved

Inspector’s/Electrician’s Licence for NSW.

UON shall be given 24 hours’ notice to allow witnessing of the supply authority or statutory testing.

Earth test results are to be presented to the UON representative prior to commencing work.

16. Drawings and Documentation

Below are the electrical drawing and documentation requirements. Other non-electrical drawing
and documentation requirements will be advised on a project by project basis.

• Single line diagrams for all HV reticulation

• Single line diagram for all LV reticulation
• HV switchgear GA
• LV Distribution boards and Main Switchboard GA
• Transformer GA
• PFC GA
• Remote operating Panel GA
• Battery Charger GA
• HV switchgear Control Wiring Diagram
• LV Distribution boards and Main Switchboards Control Wiring Diagram
• Transformer Control Wiring Diagram
• PFC Control Wiring Diagram
• Remote operating Panel Control Wiring Diagram
• Battery Charger Control Wiring Diagram
• Lighting Layout
• Small Power layout
• Earth Grid layout and termination diagram
• Communication drawings for all data connections including equipment interface
• Service trench arrangements
• Substation equipment layout
• Critical/Common alarm wiring including test points
• Lightning protection drawings
• Wiring diagram, complete with numbered cores, for all control wiring
• GA for all floor areas and showing equipment layout
• Updated GIS showing all underground services
• Electronic copy of all legends
• All CB settings
• Equipment manuals for all equipment

17. Defect Liability Period

The minimum Defect Liability Period for the project shall be twelve months. The installation
contractor shall be responsible for managing all warranty replacement of panels/inverters OR defect
recalls for components not meeting Australian requirements.

18. Miscellaneous

University of Newcastle Specification UON-ESS-113 18 | P a g e

High Voltage Substation Specification – Version 2.2
Once the works are complete, the area is to be cleaned of all redundant-loose-spare components,
construction debris and packing materials.

University of Newcastle Specification UON-ESS-113 19 | P a g e

High Voltage Substation Specification – Version 2.2