Transcript
Page 1: Telecommunications Substation Communications … · Telecommunications Substation Communications Cabinets Architecture Design Work Instruction August 2013 ... 6.10.1 Alcatel 7710,

NS208.2.1

Telecommunications Substation Communications Cabinets Architecture

Design Work Instruction

August 2013

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SUMMARY

Network Standard NS208 defines the architecture, design, procurement and installation of the Ausgrid communications rack and communications equipment for use within the Ausgrid substations. This document is one of a family of documents which encompass NS208.

ISSUE

For issue to all Ausgrid and Accredited Service Providers’ staff involved with the design of Ausgrid’s major substations.

Ausgrid maintains a copy of this and other Network Standards together with updates and amendments on www.ausgrid.com.au.

Where this standard is issued as a controlled document replacing an earlier edition, remove and destroy the superseded document.

DISCLAIMER

As Ausgrid’s standards are subject to ongoing review, the information contained in this document may be amended by Ausgrid at any time.

It is possible that conflict may exist between standard documents. In this event, the most recent standard shall prevail.

This document has been developed using information available from field and other sources and is suitable for most situations encountered in Ausgrid. Particular conditions, projects or localities may require special or different practices. It is the responsibility of the local manager, supervisor, assured quality contractor and the individuals involved to ensure that a safe system of work is employed and that statutory requirements are met.

Ausgrid disclaims any and all liability to any person or persons for any procedure, process or any other thing done or not done, as a result of this Standard.

Note that compliance with this Network Standard does not automatically satisfy the requirements of a Designer Safety Report. The designer must comply with the provisions of the WHS Regulation 2011 (NSW - Part 6.2 Duties of designer of structure and person who commissions construction work) which requires the designer to provide a written safety report to the person who commissioned the design. This report must be provided to Ausgrid in all instances, including where the design was commissioned by or on behalf of a person who proposes to connect premises to Ausgrid’s network, and will form part of the Designer Safety Report which must also be presented to Ausgrid. Further information is provided in Network Standard (NS) 212 Integrated Support Requirements for Ausgrid Network Assets.

INTERPRETATION

In the event that any user of this Standard considers that any of its provisions is uncertain, ambiguous or otherwise in need of interpretation, the user should request Ausgrid to clarify the provision. Ausgrid’s interpretation shall then apply as though it was included in the Standard, and is final and binding. No correspondence will be entered into with any person disputing the meaning of the provision published in the Standard or the accuracy of Ausgrid’s interpretation.

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Network Standard NS208.2.1

Telecommunications Substation Communications Cabinets Architecture Design Work Instruction

August 2013

CONTENTS

1  OVERVIEW.................................................................................................................. 1 

2  RELEVANT STANDARDS AND GUIDES.................................................................... 2 2.1  Network Standards........................................................................................... 2 2.2  Australian Standards........................................................................................ 2 2.3  Other Standards............................................................................................... 2 2.4  Engineering Drawings ...................................................................................... 2 

3  ENCLOSURES ............................................................................................................ 3 3.1  Functionality and Location ............................................................................... 3 3.2  Common Requirements ................................................................................... 4 3.3  Cable Management and Rack Mechanics ....................................................... 5 

4  FIBRE PATCH ENCLOSURES.................................................................................... 6 4.1  Function............................................................................................................ 6 4.2  Allocation Of Fibre Tubes On Patch Panels .................................................... 6 

4.2.1  Optical Cables Up To And Including 72 Fibre Capacity ........................... 6 4.2.2  Optical Cables Exceeding 72 Fibre Capacity........................................... 6 

4.3  Allocation Of Fibres On Wingbacks ................................................................. 7 4.4  Specific Considerations.................................................................................... 7 

4.4.1  Specific Teleprotection Requirements...................................................... 8 4.4.2  Fibre Optic Wingbacks and Fibre Optic Patch Panels ............................. 8 

4.5  Non Standard Design....................................................................................... 8 4.6  Cable Entries.................................................................................................... 8 4.7  Equipment ........................................................................................................ 9 

5  PROTECTION COMMUNICATIONS ENCLOSURES................................................ 10 5.1  Function.......................................................................................................... 10 5.2  Allocation Of Fibre Tubes On Wingbacks ...................................................... 10 5.3  Specific Considerations.................................................................................. 10 

5.3.1  Specific Teleprotection Requirements.................................................... 11 5.3.2  Fibre Optic Wingbacks ........................................................................... 11 

5.4  DC Power Supply And Distribution – Specific Requirements ........................ 11 5.5  AC Power Supply And Distribution – Specific Requirements ........................ 11 5.6  Non Standard Design..................................................................................... 11 5.7  Cable Entries.................................................................................................. 11 5.8  Equipment ...................................................................................................... 11 

6  MPLS AND GENERAL EQUIPMENT ENCLOSURES............................................... 13 6.1  Function.......................................................................................................... 13 6.2  Allocation Of Fibres On Wingbacks ............................................................... 13 6.3  Specific Considerations.................................................................................. 13 

6.3.1  Teleprotection Requirements ................................................................. 14 6.3.2  Fibre Optic Wingbacks ........................................................................... 14 

6.4  Retrospective Considerations ........................................................................ 14 6.5  DC Power Supply And Distribution – Specific Requirements ........................ 15 6.6  AC Power Supply And Distribution – Specific Requirements ........................ 15 6.7  Non Standard Design..................................................................................... 15 6.8  Cable Entries.................................................................................................. 15 

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6.9  Ethernet Cabling Overview ............................................................................ 15 6.10  Electronic Equipment ..................................................................................... 15 

6.10.1  Alcatel 7710, 7750 & 7450 Core Switches............................................. 15 6.10.2  Alcatel 7250 Local Access Switch.......................................................... 16 6.10.3  Power over Ethernet Switch ................................................................... 16 6.10.4  Wireless Access Points .......................................................................... 17 6.10.5  VoIP Phones........................................................................................... 18 

7  LABELLING OF EQUIPMENT AND SERVICES........................................................ 19 

8  POWER SUPPLY AND DISTRIBUTION.................................................................... 20 8.1  DC/DC Converter ........................................................................................... 21 8.2  AC/DC Rectifier/Charger................................................................................ 21 8.3  AC Power ....................................................................................................... 21 

9  ENCLOSURE EARTHING AND GROUNDING PROTECTION ................................. 22 9.1  Reasons for Grounding .................................................................................. 22 

9.1.1  Safety (Personnel).................................................................................. 22 9.1.2  Safety (Equipment)................................................................................. 22 9.1.3  Electrostatic Discharge (ESD) Reduction............................................... 22 

9.2  Isolated Ground Plane Principles................................................................... 22 9.3  Power Supply Grounding ............................................................................... 22 

10  APPENDIX A – TYPICAL EQUIPMENT POWER REQUIREMENTS ........................ 23 

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NS208.2.1

1 OVERVIEW

The primary purpose of this document is to define the architecture, design, procurement and installation of the Ausgrid communications rack and communications equipment for use within the Ausgrid substations.

This document also defines the requirements for selection of equipment where standard equipment has not been specified, or a non standard installation is required.

The main topics covered in this document include:

Cabinet Layout

Equipment Description

Distribution Panels (optic fibre, copper)

Power Distribution

Grounding

NS208.2.1 is a part of NS208, a family of documents detailing the design of Communications Panels and associated infrastructure.

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NS208.2.1

2 RELEVANT STANDARDS AND GUIDES

2.1 Network Standards In all instances where the requirements of this document conflict with a Network Standard, the Network Standard shall take precedence.

NS191 Batteries and Battery Chargers in Major Substations

NS203 Planning and Design Standards for Electrical Network Telecommunications Assets

NS205 Fibre Optic Cabling Installation – Cable Markers, Placement and Numbering

NS206 Earthing Requirements for Communications Assets

NEG-TC08.1.1 Telecommunications Dictionary

NEG-TC08.1.2 Telecommunications Reference

TCWI-1.5.07 Selection Of Communications Panel Type

2.2 Australian Standards In all instances where the requirements of this document conflict with an Australian Standard, the document with the more stringent requirements shall take precedence.

AS/NZS3000 Wiring Rules

AS1768 Lightning Protection

2.3 Other Standards In all instances where the requirements of this document conflict with another standard or guide, this document shall take precedence.

Bellcore Standard Isolated Ground planes: Definition and application

CCITT K.27 Bonding configurations and earthing inside a telecommunication building.

2.4 Engineering Drawings 221165 Design drawings, communications panels

(multiple sheets)

221193 Communications panel link and fuse configuration (multiple sheets)

65587 Control And Protection Secondary Cables Nomenclature Guide

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NS208.2.1

3 ENCLOSURES

3.1 Functionality and Location Enclosures shall be placed next to existing communications, teleprotection and SCADA enclosures where possible due to practicality of interoperation between equipment. Where multiple enclosures have to be installed at a location to provide communications redundancy for protection or other purposes, the enclosures shall be physically separated to minimise a single point of failure in the event of a fire.

Sites where communications enclosures are required can be broken into the following areas:

1. “MPLS and General Equipment” Enclosures (MEP, MIX and WIM as per drawing 65587)

MPLS equipment used to integrate the site into the Ausgrid MPLS network is installed in these enclosures to achieve connectivity, and comprises one of the following:

a. Sites where Alcatel 7450 or 7710 core devices are installed, requiring an 800mm deep rack to house the 7450 or 7710 are denoted as a “Core Site” and require both a core device (i.e. a 7450, a 7710 or a 7750) and a 7250 edge device, and typically are subtransmission substations.

b. Sites where a single 7250 edge devices are installed. Such sites are denoted as a “Standard Site”, and are typically zone substations.

The decision as to what form a particular site takes (i.e. a “Core Site” or a “Standard Site” shall be made by the manager responsible for the logical design of the MPLS network.

Both of the above installations can be powered by one of the following means:

a. Sites where the enclosure can be powered from a substation battery (e.g. zone substations), where the communications rack is powered from the substation battery through a DC-DC converter.

b. Sites where a substation battery is not readily available, such as depots, where an uninterruptible power supply will be provided as part of the installation.

“MPLS And General Equipment” enclosures should be located in a communications room where one exists in the substation.

2. “Fibre Patch” Enclosures (FOP as per drawing 65587)

Optical Fibre cables entering substations from the street are terminated and subsequently distributed throughout the substation from the Fibre Patch enclosures. The internal hardware of these enclosures (which may contain power system protection signalling) shall only be accessed by those personnel responsible for maintenance of power system protection schemes. “Fibre Patch” enclosures shall be denoted “Fibre Patch 1”, “Fibre Patch 2”, “Fibre Patch 3” etc.

“Fibre Patch” enclosures should be located in a communications room where one exists in the substation.

3. “Protection Comms” Enclosures (FOX as per drawing 65587)

Active communications and media conversion equipment associated with power system protection scheme communications shall be housed in the “Protection Comms” enclosures. The internal hardware of these enclosures (which may contain power system protection signalling) shall only be accessed by those personnel responsible for maintenance of power system protection schemes.

“Protection Comms” enclosures shall be sited in the substation control room (i.e. in the same room as the protection panels to which they connect), and should be separated as far from each other as practicable. If the “Fibre Patch” enclosures are located in the control room, the “Protection Comms” enclosures shall be sited adjacent to the “Fibre Patch” enclosure to which the majority of the optical fibres from the “Protection Comms” enclosure are connected.

Note that requirements for quantities of the above enclosures are detailed in a separate document of the NS208 family of documents.

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NS208.2.1

3.2 Common Requirements Each enclosure will be configured with the following:

Steel doors front & rear, complete with push button inserts, three locking points, internal door stiffener (if required) and bonded to frame. Doors shall be removable and be supplied with handles suitable for fitment of a euro style barrel lock. Enclosures to be delivered fitted with a blank barrel. Hinge pins shall be different lengths to facilitate removal and replacement of the doors. Each door shall be bonded to the frame with 4.0mm2 braided cable.

19”, cranked angles fitted front & rear, complete with RU markers fitted via 3 off 23 x 73mm punched sections in the depth

Removable top panel, in four 150mm deep sections running across the top from left to right. with capacity to interchange each of the four sections independently with a brush panel entry plate.

Removable side panels.

2 x 100mm perforated trays fitted either side of the enclosure (i.e. four perforated trays in total) and running vertically as per layout drawings elsewhere in this document.

Base complete with adjustable gland plates and 100mm plinth fitted, (plinth bolted internally through frame). The base shall be bonded to the frame with 4.0mm2 braided cable.

1 off 7113000 earth bar fitted at front/ bottom

2 off 360m3/h fans shall be installed in the lower portion of the front door and terminated with a 10A plug and cable of sufficient length to reach the upper rear of the enclosure. One fan shall be wired to the plug to run continuously, and the second fan shall be wired through an a 30 to 50 degree Celsius adjustable thermostat

Layout, supports, telescopic shelves as per drawing 221165

AC and DC power distribution as per drawing 221165

Rear access should be provided for all enclosures to facilitate cable installation.

All patch panels and fibre wingbacks shall have minimum 100mm clearance to the face of the closed front and rear doors.

All patching and terminations, fibre or copper, shall be at the front of the rack wherever practical. Appropriate cable management shall be provided such that all incoming and internal cables shall be fully supported in both vertical and horizontal runs.

The enclosure shall be fed by a filtered air intake at the bottom front1 of the enclosure, air being drawn through the enclosure by fan(s) mounted in the bottom of the front door of the enclosure. Air will be discharge through 2 x 204mm² filters (removable/ washable media), fitted at the top of the rear door. One fan shall be running all the time; one fan shall be controlled by an adjustable thermostat. The fans and filters shall be readily accessible for maintenance.

Enclosures shall be vermin proofed.

1 On some sites, if the intake filter is at the rear of the enclosure, this can be easily corrected as the front and rear doors of the selected enclosures are interchangeable. Note that the filter medium is washable and will be more noticeable when fouled if installed at the front of the enclosure.

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NS208.2.1

3.3 Cable Management and Rack Mechanics Enclosures shall comply with standard cable management and simplified enclosure mechanics. Particular attention shall be paid to:-

WAP antennae where installed in the MPLS Equipment enclosure

Vertical and horizontal cable management

Front horizontal and vertical cable management

Earthing and;

Side rail supports

A 1RU to 2RU cable management allowance shall be located beneath each piece of equipment for horizontal cable management rings and/or storage trays. Vertical cable management shall comprise cable rings on either side of the enclosure at the front which are fitted with Velcro ties, which shall be securely affixed to the enclosure frame.

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NS208.2.1

4 FIBRE PATCH ENCLOSURES

4.1 Function Optical Fibre cables entering substations from the street are terminated and subsequently distributed throughout the substation from the Fibre Patch enclosures. Access to these enclosures (which may contain power system protection signalling) is limited to those persons authorised by the manager responsible for the installation and maintenance and of the power system protection schemes.

The Fibre Patch Enclosure fulfils the following functions:

Allow for an area for splicing of incoming fibres

Allow for an area for patching and terminating of incoming fibres

Facilitate connection of incoming optical fibres to other enclosures within the substation

Note:

Where power system protection schemes between substations are interconnected by direct optical fibre, a ruggedised patch cable shall be run directly between the protection panel and the Fibre Patch enclosure to connect the protection panel to the outgoing optical fibre.

4.2 Allocation Of Fibre Tubes On Patch Panels Optical fibres entering the substation and terminated in the “Fibre Patch” enclosures shall be terminated in the following manner, with respect to the arrangement of the fibre splice panels within the patch panel and the order of the fibre tubes.

4.2.1 Optical Cables Up To And Including 72 Fibre Capacity Cables shall be terminated directly in one patch panel, with tube termination positions being as shown below.

D PANEL – ORANGE TUBEPOWER SYSTEM PROTECTION

A PANEL – BLUE TUBESCADA AND MPLS NETWORK

C PANEL – GREEN TUBEOTHER APPLICATIONS

E PANEL – WHITE TUBE (WHEN PRESENT)

G PANEL – SPARE H PANEL – GREY TUBEPOWER SYSTEM PROTECTION

F PANEL – BROWN TUBEPOWER SYSTEM PROTECTION

B PANEL – PROTECTION FIBRE WARNING LABEL

Figure 1 - Allocation Of Fibre Tubes On Patch Panels: 60 fibre and 72 fibre cables

If high density port couplers are used (eg LC Duplex couplers), the tube shall be terminated on the initial ports ie a 12 fibre tube shall be terminated in ports 1a through 6b inclusive.

4.2.2 Optical Cables Exceeding 72 Fibre Capacity The incoming optical cable shall be split into two tube groups in the rear of the panel in which it is to be terminated. Such separation shall be achieved in a mechanically protected Y splitter (being made from flexible conduit or the like). The resultant tube groups shall be terminated in two patch panels immediately vertically adjacent to each other as follows:

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NS208.2.1

D PANEL – ORANGE TUBEPOWER SYSTEM PROTECTION

A PANEL – BLUE TUBESCADA AND MPLS NETWORK

C PANEL – GREEN TUBEOTHER APPLICATIONS

E PANEL – WHITE TUBEOTHER APPLICATIONS

G PANEL – SPARE H PANEL – GREY TUBEPOWER SYSTEM PROTECTION

F PANEL – BROWN TUBEPOWER SYSTEM PROTECTION

B PANEL – PROTECTION FIBRE WARNING LABEL

A PANEL – RED TUBEOTHER APPLICATIONS

C PANEL – YELLOW TUBEOTHER APPLICATIONS

E PANEL – ROSE TUBEOTHER APPLICATIONS

G PANEL – SPARE

B PANEL – BLACK TUBEPOWER SYSTEM PROTECTION

D PANEL – VIOLET TUBEPOWER SYSTEM PROTECTION

F PANEL – AQUA TUBEPOWER SYSTEM PROTECTION

H PANEL – SPARE

UPPER PATCH PANEL

LOWER PATCH PANEL

Figure 2 - Allocation Of Fibre Tubes On Patch Panels: 144 fibre cables

If high density port couplers are used (eg LC Duplex couplers), the tube shall be terminated on the initial ports ie a 12 fibre tube shall be terminated in ports 1a through 6b inclusive.

4.3 Allocation Of Fibres On Wingbacks Optical fibres terminated in the “Fibre Patch” enclosures shall be terminated in the following manner, with respect to the arrangement of the fibre splice panels within the wingback.

A PANELNON POWER SYSTEM PROTECTION

C PANELNON POWER SYSTEM PROTECTION

E PANELNON POWER SYSTEM PROTECTION

G PANELNON POWER SYSTEM PROTECTION

D PANELPOWER SYSTEM PROTECTION

B PANEL – PROTECTION FIBRE WARNING LABEL

F PANELPOWER SYSTEM PROTECTION

H PANELPOWER SYSTEM PROTECTION

Figure 3 - Allocation Of Fibres On Wingbacks

4.4 Specific Considerations Equipment to be housed in/on the enclosure may include but not be limited to the following:

Optic Fibre distribution panels (Patch Panels and Wingbacks)

Fan assemblies

Incoming fibre optic cables shall be terminated in an alternate location if the required amount of communications equipment results in lack of space in the communications enclosure.

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NS208.2.1

All patching and terminations, fibre or copper, shall be at the front of the rack wherever practical. Appropriate cable management shall be provided such that all incoming and internal cables shall be fully supported in both vertical and horizontal runs.

Interfaces leaving the enclosures shall be optical fibre wherever possible. If conductive interfaces are required to leave the enclosures, and such interfaces have not been tested to be deemed to comply with relevant impulse withstand and isolation requirements, approval in writing shall be obtained from one of the following prior to installation:-

General communications circuits – the manager responsible for generation, maintenance and storage of communications standards

Teleprotection circuits – the manager responsible for design of the protection circuits for that area

4.4.1 Specific Teleprotection Requirements Teleprotection signals shall be carried over the fibre optic cable terminating in the enclosures. Notwithstanding the requirements of other specifications, any circuits carrying teleprotection signalling shall have the following features as a minimum requirement:-

Internal cabling shall be clearly identified as per the requirements of NS203 - Planning and Design Standards for Electrical Network Telecommunications Assets

All cabling shall be securely fastened, and run in such a manner that subsequent installations or maintenance in the enclosure does not require disturbance of the cabling

Fibre optic cabling leaving the enclosure shall comply with the requirements of NS203 - Planning and Design Standards for Electrical Network Telecommunications Assets, but as a minimum must be ruggedised or mechanically protected. Standby fibres for protection schemes shall also be installed in a similar manner.

Notwithstanding the requirements of this and other standards and specifications, trays containing protection cable splices shall be adequately sized to afford ready access and sufficient room for future splicing and/or other work.

4.4.2 Fibre Optic Wingbacks and Fibre Optic Patch Panels Maximum density of fibre optic patch panels shall be no more than 24 fibres per RU (i.e. a 72 core fibre will require a 3 RU patch panel as minimum height). All connectors shall be angled SCA.

4.5 Non Standard Design In certain circumstances, particularly in retrofit installations to existing substations, it may not be possible for the site to accommodate a 45RU high enclosure, or one of standard dimensions, orientation or design. In these instances, the non standard design shall comply with Section 4.2 – General Considerations, and Section 5.3 – Specific Considerations and shall only be installed following approval of the manager responsible for the design of the communications systems associated with power system protection.

4.6 Cable Entries Different fibre cable types entering the rack include:

ADSS

Direct Buried

Pre-terminated fibre, including ruggedised patch cords

Patch cords, enclosed in protection

Notwithstanding other requirements of Network Standards and Engineering Guidelines, cable entries and decisions regarding which fibre optic cables are brought into which communications enclosure shall comply with the requirements of NS203 – Planning and Design Standards for Electrical Network Telecommunications Assets.

A loop of fibre-optic cable must be coiled inside the communications cabinet. One loop inside the cabinet should be fine and would provide approx. 5 metres of free cable so that the fibre termination panel can be removed from the cabinet, lowered down and placed onto a table for splicing. The concept of releasing the cable glands and pulling the cable through to do the terminations introduces

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NS208.2.1

the risk of damage. In some instances, there is insufficient room in the sub to have loops external to the cabinet.

The vertical cable trays at the rear of the cabinet should have sufficient room to store the cable loop.

4.7 Equipment Notwithstanding the details contained in this section of the document, equipment required for use in this enclosure shall be approved by the manager responsible for the design of the power system protection scheme communications interfaces.

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5 PROTECTION COMMUNICATIONS ENCLOSURES

5.1 Function The Protection Communications enclosures provide housing for active electronic interfaces between the substation power system protection schemes and the outgoing optical fibre and radio systems. Active communications and media conversion equipment associated with power system protection schemes is housed in the protection communication enclosures. Access to these enclosures is limited to those persons authorised by the manager responsible for the installation and maintenance and of the power system protection schemes.

5.2 Allocation Of Fibre Tubes On Wingbacks Optical fibres terminated in the “Protection Comms” enclosures shall be terminated in the following manner, with respect to the arrangement of the fibre splice panels within the wingback.

Figure 4 - Allocation Of Fibres On Wingbacks

5.3 Specific Considerations Equipment to be housed in/on the enclosure may include but not be limited to the following:

Protection relay media converters

Network Management media converters

Power system protection multiplexers

Optic Fibre distribution panels

DC Distribution panels

DC/DC converters

Fan assemblies

Incoming fibre optic cables shall be terminated in an alternate location if the required amount of communications equipment results in lack of space in the communications enclosure.

Interfaces leaving the enclosures shall be optical fibre wherever possible. If conductive interfaces are required to leave the enclosures, and such interfaces have not been tested to be deemed to comply with relevant impulse withstand and isolation requirements, approval in writing shall be obtained from one of the following prior to installation:-

General communications circuits – the manager responsible for generation, maintenance and storage of communications standards

Teleprotection circuits – the manager responsible for design of the protection circuits for that area

All power converters and power supplies shall have n-1 redundancy in each enclosure (i.e. failure of a single item shall not affect operation of the equipment).

Notwithstanding any other requirements, equipment selected for installation in the enclosure and with copper interfaces leaving the enclosures shall comply with the following isolation requirements:-

2kV between all terminals and earth

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NS208.2.1

2kV between terminals.

5.3.1 Specific Teleprotection Requirements Teleprotection signals shall be carried over the fibre optic cable terminating in the enclosures. Notwithstanding the requirements of other specifications, any circuits carrying teleprotection signalling shall have the following features as a minimum requirement:-

Internal cabling shall be clearly identified as per the requirements of NS203 - Planning and Design Standards for Electrical Network Telecommunications Assets

All cabling shall be securely fastened, and run in such a manner that subsequent installations or maintenance in the enclosure does not require disturbance of the cabling

Fibre optic cabling leaving the enclosure shall comply with the requirements of NS203 - Planning and Design Standards for Electrical Network Telecommunications Assets, but as a minimum must be ruggedised or mechanically protected. Standby fibres for protection schemes shall also be installed in a similar manner.

Notwithstanding the requirements of this and other standards and specifications, trays containing protection cable splices shall be adequately sized to afford ready access and sufficient room for future splicing and/or other work.

5.3.2 Fibre Optic Wingbacks Maximum density of fibre optic patch panels shall be no more than 24 fibres per RU (i.e. a 72 core fibre will require a 3 RU patch panel as minimum height). All connectors shall be angled SCA and LC duplex.

5.4 DC Power Supply And Distribution – Specific Requirements2 Enclosures shall generally be powered from the substation battery; nominally either 110VDC, 48VDC or 36VDC via a DC/DC Converter. Converters, rectifiers and power supplies shall have n-1 redundancy in each enclosure (i.e. failure of a single item shall not affect operation of the equipment).

5.5 AC Power Supply And Distribution – Specific Requirements3 AC Power Supply and Distribution shall comply with general Power Supply and Distribution requirements noted elsewhere in this document

5.6 Non Standard Design In certain circumstances, particularly in retrofit installations to existing substations, it may not be possible for the site to accommodate a 45RU high enclosure, or one of standard dimensions, orientation or design. In these instances, the non standard design shall comply with Section 4.2 – General Considerations, and Section 6.3 – Specific Considerations and shall only be installed following approval of the manager responsible for the design of the communications systems associated with power system protection.

5.7 Cable Entries Different fibre cable types entering the rack include:

Pre-terminated fibre, including ruggedised patch cords

Patch cords, enclosed in protection

Notwithstanding other requirements of Network Standards and Engineering Guidelines, cable entries and decisions regarding which fibre optic cables are brought into which communications enclosure shall comply with the requirements of NS203 – Planning and Design Standards for Electrical Network Telecommunications Assets.

The vertical cable trays at the rear of the cabinet should have sufficient room to store the cable loop.

5.8 Equipment

2 3

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Notwithstanding the details contained in this section of the document, equipment required for use in this enclosure shall be approved by the manager responsible for the design of the power system protection scheme communications interfaces.

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NS208.2.1

6 MPLS AND GENERAL EQUIPMENT ENCLOSURES

6.1 Function MPLS equipment used to integrate the site into the Ausgrid MPLS network is installed in these enclosures to achieve connectivity, and comprises one of the following:

a. Sites where Alcatel 7450 or 7710 core devices are installed, requiring an 800mm deep rack to house the 7450 or 7710 are denoted as a “Core Site” and require both a core device (i.e. a 7450, a 7710 or a 7750) and a 7250 edge device, and typically are subtransmission substations.

b. Sites where a single 7250 edge devices are installed. Such sites are denoted as a “Standard Site”, and are typically zone substations.

The decision as to what form a particular site takes (i.e. a “Core Site” or a “Standard Site” shall be made by the manager responsible for the logical design of the MPLS network.

Both of the above installations shall be powered by one of the following means:

a. Where the enclosure can be powered from a substation battery (i.e. substations), the communications rack shall be powered from the substation battery through a DC-DC converter.

b. Where a substation battery is not available, (e.g. depots), an uninterruptible power supply shall be installed as part of the installation and used to power the rack.

6.2 Allocation Of Fibres On Wingbacks Optical fibres terminated in the “MPLS Equipment” enclosures shall be terminated in the following manner, with respect to the arrangement of the fibre splice panels within the wingback.

Figure 5 - Allocation Of Fibres On Wingbacks

6.3 Specific Considerations Equipment to be housed in/on the enclosure may include but not be limited to the following:

Local access switch

MPLS backhaul device

Optic Fibre distribution panels

Wireless Access Points

DC Distribution panels

DC/DC converters

PoE switches

Fan assemblies

Incoming fibre optic cables shall be terminated in an alternate location if the required amount of communications equipment results in lack of space in the communications enclosure.

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NS208.2.1

Enclosures shall have the following features:-

Rear access should be provided for all enclosures to facilitate cable installation. If absolutely necessary due to space restrictions, rear access may be reduced or not provided.

All patch panels shall have minimum 100mm clearance to the face of the closed front and rear doors.

The enclosure(s) shall be of welded metal frame construction

The enclosure(s) shall have a metal front and rear door, and both shall be removable and have internal door stiffening. Hinge pins shall be different lengths to facilitate removal and replacement of the doors. Door handles shall be provided such as to facilitate removal and replacement of the doors. Note that there is no requirement for the doors to be key lockable

The enclosure(s) have front and rear entry wherever possible

Enclosure side panels shall be removable with bonding to the frame using 16mm2 braided cable

Basic EMC shielding shall be achieved via the design and bonding between doors, side panels and the cabinet frame

All patching and terminations, fibre or copper, shall be at the front of the rack wherever practical. Appropriate cable management shall be provided such that all incoming and internal cables shall be fully supported in both vertical and horizontal runs.

Interfaces leaving the enclosures shall be optical fibre wherever possible. If conductive interfaces are required to leave the enclosures, and such interfaces have not been tested to be deemed to comply with relevant impulse withstand and isolation requirements, approval in writing shall be obtained from one of the following prior to installation:-

General communications circuits – the manager responsible for generation, maintenance and storage of communications standards and records

Teleprotection circuits – the manager responsible for design of the protection circuits for that area

All converters, rectifiers and power supplies shall have n-1 redundancy in each enclosure (i.e. failure of a single item shall not affect operation of the equipment).

Notwithstanding any other requirements, equipment selected for installation in the enclosure and with copper interfaces leaving the enclosures shall comply with the following isolation requirements:-

2kV between all terminals and earth

2kV between terminals.

6.3.1 Teleprotection Requirements Optical fibres carrying teleprotection signalling shall not pass through or terminate in the MPLS enclosure.

6.3.2 Fibre Optic Wingbacks Maximum density of fibre optic patch panels shall be no more than 24 fibres per RU (i.e. a 72 core fibre will require a 3 RU patch panel as minimum height). All connectors shall be angled SCA and LC duplex.

6.4 Retrospective Considerations In a number of brownfield sites, optical fibres entering the substation from outside may have been terminated in the MPLS enclosures (for historical reasons)

a. Further optical fibres entering the substation from outside the site shall not be terminated in the MPLS enclosures

b. All reasonable and necessary steps shall be undertaken to relocate existing incoming optical fibre terminations into the “Patch Panel” enclosures.

c. Until an optical fibre is relocated from the “MPLS Equipment Enclosure” to one of the “Fibre Patch” enclosures, further protection services shall not be installed on the optical fibre.

d. There is no requirement to retrospectively modify the AC or DC distribution to comply with this standard

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NS208.2.1

6.5 DC Power Supply And Distribution – Specific Requirements4 Enclosures shall generally be powered from the substation battery; nominally either 110VDC, 48VDC or 36VDC via a DC/DC Converter. Converters, rectifiers and power supplies shall have n-1 redundancy in each enclosure (i.e. failure of a single item shall not affect operation of the equipment).

6.6 AC Power Supply And Distribution – Specific Requirements5 AC Power Supply and Distribution shall comply with general Power Supply and Distribution requirements noted elsewhere in this document

6.7 Non Standard Design In certain circumstances, particularly in retrofit installations to existing substations, it may not be possible for the site to accommodate a 45RU high enclosure, or one of standard dimensions, orientation or design. In these instances, the non standard design shall comply with Section 4.2 – General Considerations, and Section 7.2 – Specific Considerations and shall only be installed following approval of the manager responsible for the design of the communications systems associated with power system protection.

6.8 Cable Entries Different fibre cable types entering the enclosure include:

Pre-terminated fibre, including ruggedised patch cords

Patch cords, enclosed in protective conduit or similar

All cables entering the enclosure shall have bend radius controlled.

6.9 Ethernet Cabling Overview All Category 5 and Category 6 based 10/100/1000BaseT cabling shall be run through the RJ45 Patch panel. Cabling shall be maintained neatly in the ducts of the rack.

The RJ45 patch panel (KRONE or equivalent) shall be for cross connecting, terminating and patching for all cables with RJ45 ends. The patch panel shall adhere to the figure as depicted in Figure .

Figure 6 - RJ45 Patch Panel Layouts

6.10 Electronic Equipment Notwithstanding the details contained in this section of the document, equipment which meets the required criteria is listed in Appendix A – Parts List.

6.10.1 Alcatel 7710, 7750 & 7450 Core Switches The Alcatel 7450 core switch shall be used for the core switching requirements. These units shall generally be located in subtransmission substations, and require a space of 1.5RU and a depth of 800mm. Where additional communications are required an Alcatel 7710 requires a space of 3RU and a 7750 requires a space of 8RU.

As this will be central node in the MPLS network, there shall be ventilation in the side of the enclosures to allow for circulation of hot air dissipating from this switch.

4 5

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NS208.2.1

6.10.2 Alcatel 7250 Local Access Switch This local access switch shall provide the communications gateway for services in substations and depots. It is a 1 RU box that provides the following interfaces:

12x100 Base FX SFP Ports

8x10/100 BaseT Ethernet

4xGigE SFP Ports

2xOptional access module with 4 port E1

In each rack there shall be a 7250 Access switch for backhauling and a 7250 Substation LAN for local substation LAN access.

6.10.3 Power over Ethernet Switch Power over Ethernet (PoE) enables both a 48V DC supply and Ethernet traffic to be transmitted to a remote device over Category 5 or Category 6 twisted pair cable. PoE is the preferred method of power delivery to all VoIP phones and Wireless Access Points. All Power over Ethernet devices must be IEEE 802.3af compliant. The power supply for all VoIP phones must be battery backed.

At the time of writing this document, the preferred method for provisioning PoE is to install a GarrettCom PS14P 4-port Ethernet Switch in each MPLS Cabinet with a 7250 switch. The default wiring for the GarretCom switch is as follows:

Port Wiring

Power - 48VDC to MPLS enclosure DC distribution panel

Ethernet Port 1 7250 Port 1/1/1

Ethernet Port 2 VoIP Phone

Ethernet Port 3 SPARE (2nd Phone or WAP if required)

Ethernet Port 4 Wireless Access Point

Figure 7 - GarrettCom PS14P

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NS208.2.1

Figure 8 - GarretCom PS14P Connections

The switch shall be securely mounted in the Communications Cabinet, above the 7250 on a shelf/modem tray.

6.10.4 Wireless Access Points Wireless Access Points (WAPs) shall be installed on all cabinets with an installed switching device. The standard Wireless Access Point is the Alcatel-Lucent AP-60 with an AP70 being used for core sites. A cabinet containing either a 7450 or 7710 core switch shall have an AP70 type antenna while a cabinet containing only a 7250 shall have an AP60 type antenna.

The AP-60 shall be attached to the WAP mounting panel, situated on the fan baffle at the top of the MPLS enclosure. The WAP shall be cabled to the PoE switch, using shielded CAT 6 cable.

Figure 9 - Type AP60 WAP antenna mounted on top of cabinet

Mount the AP 70 antenna (big access point), flat on the top of the cabinet, with double sided tape (do not use the mounting bracket). The integrated antenna should be opened to 90 degrees, so that it points upwards (and the flat part of the antenna faces out from the rack).

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NS208.2.1

Figure 10 - Type AP70 WAP antenna

6.10.5 VoIP Phones A minimum of one VoIP phone shall be installed at each location with a 7250. The standard VoIP Phone is the Alcatel-Lucent Omnitouch. VoIP phones must be wired from their install location back to the GarrettCom PS14P described above. VoIP phones must be permanently marked with the Ausgrid logo.

Figure 11 – Typical IP phone for substation installation

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NS208.2.1

7 LABELLING OF EQUIPMENT AND SERVICES

All equipment, cables, (including patchleads), and circuit breakers will be labelled.

Labelling of equipment and services associated with teleprotection shall comply with the requirements of NS205 – Fibre Optic Cabling Installation – Cable Markers, Placement & Numbering and NS203 – Planning and Design Standards for Electrical Network Telecommunications Assets.

The standard to be adopted is for ‘Trafolyte’ yellow/black/yellow providing black lettering on a yellow background.

Power system protection warning labels shall be manufactured as per figure 19. The upper label shall be installed on the top right hand port of all patch panels and wingbacks. The lower label shall to be installed on both the inside and the outside of both the front and rear enclosure doors

Figure 11 – Power system protection warning labels

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NS208.2.1

An optical fibre label shall also be installed on patch panels terminating outgoing optical fibres. Such label shall specify the cable number and source/destination substation. This is to be positioned between the left and right fibre termination ports in the middle of the patch panel.

Figure 13 – Optical fibre label

8 POWER SUPPLY AND DISTRIBUTION

Generally, the communications racks in a substation shall be powered from one of the substation batteries. The following should be noted for all substation installations:-

1. Prior to connection of the communications enclosure to the substation battery, the battery capacity should be checked to verify that it is adequate to power the increased load.

a. In greenfield sites, communications cabinet load has been accounted for when calculating the battery capacity and the cabinet can be installed without further capacity checks

b. In brownfield sites, installation should only proceed following completion of the following steps:

i. Substation battery capacity, standing load and the contract under which the battery was bought should be obtained from the manager responsible for maintenance of the protection schemes within the substation or their authorised representative by the person.

ii. Approval should be sought from the manager responsible for plant engineering or their authorised representative to connect the enclosure to the substation battery following their successful review of the battery capacity and standing load figures.

2. Under no conditions shall multiple battery supplies be brought into a common cabinet, and under no conditions should equipment be powered from multiple batteries. In all instances where equipment powered from one battery is to be connected to equipment powered from another battery, the connection between the two items of equipment shall be an optical interface.

3. Under no circumstances should the substation battery be directly or indirectly earthed.

4. The group responsible for deign of the substation electrical circuits shall advise the correct circuit connection at which to connect the cabinets to the substation battery DC system.

NOTE: If, in the course of verification of substation battery capacity it is determined that the battery and/or battery charger capacity is too small to power the proposed communications equipment, then the battery shall be upsized, rather than powering the communications equipment from an AC supply.

Notwithstanding the details contained in this section of the document, equipment which meets the required criteria is listed in Bills Of Materials in drawing set 221165

Representative loadings for common equipment are listed in Appendix A – Typical Equipment Power Requirements.

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NS208.2.1

8.1 DC/DC Converter A DC/DC converter shall be used to convert the substation battery voltage to -48VDC for powering the communications equipment. DC/DC converters shall have the following features:

Facilitate n-1 redundancy (i.e. such that failure of one module results in continued operation of the communications equipment)

Backplane is isolated with an MCB cage for converters inside

Be SNMP manageable (alarms shall be conveyed to the OTC via this interface)

Be hot swappable or contain hot swappable modules

Have 5kV isolation between input and output

The outputs of the DC/DC converter will be directed to the power distribution panel.

Where there is an existing 48 volt DC supply, 48 volt to 48 volt DC/DC converters will still be employed to ensure isolation.

8.2 AC/DC Rectifier/Charger For those locations where a substation battery is unavailable and where use of an uninterruptible power supply is noted as being acceptable (elsewhere in this standard), the enclosures shall be powered from an uninterruptible power supply separately located to the communications cabinet.

UPS batteries shall be fitted such that end cell voltage shall not be reached from full charge in less than 5 hours from loss of AC supply, based upon connected standing load of the communications equipment.

8.3 AC Power A 10A general purpose double outlet shall be installed on the left had upper rear of the enclosures for connection and powering of the enclosure fans. Cabling will be run directly to the GPO from the substation sub distribution board and shall be protected by an earth leakage circuit breaker located in the substation sub distribution board.

Figure 14 - Photograph of Cabinet GPO installation

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NS208.2.1

9 ENCLOSURE EARTHING AND GROUNDING PROTECTION

The enclosure(s) shall be installed in accordance with NS206 – Earthing Requirements for Communications Assets. Notwithstanding the requirements of NS206, the general principles outlined in this section shall be observed.

9.1 Reasons for Grounding

9.1.1 Safety (Personnel) All structures supporting or enclosing electrical equipment or conductors shall be grounded so as to reduce the potential differences between them under conditions of lightning or fault current flow.

The grounding shall prevent any system voltages from appearing continuously on any equipment or structural frames.

In the event of a short circuit fault to the equipment structures, the grounding shall ensure the operation of a circuit protection device to clear the fault.

All metallic parts of both the isolated and insulated ground planes shall be grounded so that fault voltages are not transmitted to personnel.

9.1.2 Safety (Equipment) The grounding system shall provide a low impedance path to allow lightning currents to flow to earth.

The grounding system shall provide a fault current path of sufficiently low impedance to ensure the operation of any protective device that is associated with the fault.

The grounding system shall minimise the effects of noise disturbances originating inside or outside the isolated ground plane on the equipment operating therein.

The grounding system shall prevent noise currents from external sources from being conducted into the isolated ground plane.

9.1.3 Electrostatic Discharge (ESD) Reduction The grounding system shall maintain low impedance paths so as to minimise the effects of ESD build-up

All components that form the grounding system shall be selected to resist deterioration and reduce maintenance.

9.2 Isolated Ground Plane Principles Each enclosure shall be treated as an isolated ground plane.

An isolated ground plane shall be designed to reduce noise current flow due to the following conditions:

Lightning Strikes

External power faults

Surge protectors that are connected from line to ground

Multigrounded AC and DC power sources

Incorrect load connections.

9.3 Power Supply Grounding Generally, multi-grounded power sources (sources with one load current-carrying member grounded at more than one point along its length) shall not be used to power isolated ground plane loads except as specified.

All DC power supplies serving an isolated ground plane shall be single-point grounded.

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NS208.2.1

10 APPENDIX A – TYPICAL EQUIPMENT POWER REQUIREMENTS

The following table shall be used as a guide to determine substation battery or AC supply loading, and to determine power supply requirements in non standard designs. Note that the figures quoted below are intentionally conservative and marginal sizing of supplies may require site specific load analysis.

Item Operating Voltage Volts DC

Maximum Load

Typical Efficiency (%)

Recommended Protection

Alcatel 7250 Edge Device -36 to -60 144 W 6A C/B

Alcatel 7450 Core Device -36 to -60 308 W 16 C/B

Alcatel 7710SR c4 -40.5 to -72 434 W (9A)

16A C/B

Alcatel 7710SR c12 -40.5 to -72 16 A 32A C/B

Actelis ML 600 (DSL modem) -40 to -72 0.5 A 2A C/B

RIC I 4E1 (E1 to ethernet) -48 ( 10%) 10 W 6A C/B

GarretCom 4 port PS14P

(Power over Ethernet)

-49 to 60 1.4 A 6A C/B

WAP 10 W

Commtel OAP402 switch 10 W

Loop AM3440 Multiplexer 50 W

Eaton Powerware MCS6 DCDC Converter 85%

Eaton Powerware APR48 Rectifier / Charger

90%

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Ausgrid.

This document must not be reproduced in whole or in part or converted to machine readable form or stored in a computer or imaging system without the written permission of Ausgrid.

Document Control

Authorised By: Terry Lampard Date:16 January 2012

Manager – Standards & Communications

Document Number: NS208.2.1

Revision History

Initial issue: as NRS 208 21/08/2007 2nd issue: as NS208 23/07/2009 Part NS208 revised to NS208.2.1 22/12/2009 2nd Issue as NS208.2.1 24 March 2011 Further NS208.2.1 Issue 16 January 2012 Further NS208.2.1 Issue 31 August 2013


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