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NATIONAL GUIDELINES FOR AERIALSURVEILLANCE OF OVERHEAD ELECTRICITYNETWORKS
ENA NENS 08—2006
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ENA NENS 08—2006
NATIONAL GUIDELINES FOR AERIAL
SURVEILLANCE OF OVERHEAD ELECTRICITY
NETWORKS
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DISCLAIMER
This document refers to various standards, guidelines, calculations, legal
requirements, technical details and other information.
Over time, changes in Australian Standards, industry standards and legislative
requirements, as well as technological advances and other factors relevant to the
information contained in this document, may affect the accuracy of the information
contained in this document. Accordingly, caution should be exercised in relation to
the use of the information in this document.
The Energy Networks Association (ENA) accepts no responsibility for the accuracy
of any information contained in this document or the consequences of any person
relying on such information.
Correspondence should be addressed to the CEO, Energy Networks Association,
Level 3, 40 Blackall Street, Barton, ACT 2600.
First published as ESAA NENS 08—2004.
Redesignated as ENA NENS 08—2006.
COPYRIGHT
© Energy Networks Association 2006
All rights are reserved. No part of this work may be reproduced or copied in any form or by any means, electronic
or mechanical, including photocopying, without the written permission of the Association.
Published by Standards Australia, GPO Box 476, Sydney, NSW 2001 for the Energy Networks Association,
Level 3, 40 Blackall Street, Barton, ACT 2600.
ISBN: 0 7337 7522 5
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1 ENA NENS 08—2006
PREFACE
This Guideline is identical to the publication previously issued by the Electricity Supply
Association of Australia (ESAA) as ESAA NENS 08—2004 and has been redesignated and
reissued by Energy Networks Association (ENA) as ENA NENS 08—2006. A number of
other ESAA documents have been reissued by the Energy Networks Association.
Restructuring of the Electricity Supply Industry throughout Australia and New Zealand has
removed traditional geographical boundaries and greatly increased the likelihood that
employees and Service Providers move between organisations, States and Countries.
The Electricity Supply Association of Australia (ESAA) has produced a National Electricity
Network Safety Code as the peak hierarchical document on electricity industry safety in
Australia with the objectives to:
• promote safety as a priority for customers, the public and industry workers;
• promote nationally consistent practices;
• promote economic efficiencies through standardisation; and
• simplify the interpretation of regulatory requirements.
These Guidelines were developed jointly by representatives of the Australian generation,
transmission and distribution electricity supply industry and the Electricity Supply
Association of Australia to support the objectives of the National Electricity Network
Safety Code and fit into the following framework.
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Acts and
Regulations
Codes
Standards and
Guidelines
Organisational Policies, Practices
and Approved
Procedures
These Guidelines have been produced to assist in the development and application of
standards for aerial surveillance of Overhead Electricity Networks.
These Guidelines set out broad principles for aerial surveillance of Overhead Electricity
Networks, with provision for more specific requirements to be documented by the relevant
Network Operators and/or Service Providers to meet statutory requirements and their work
requirements.
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ENA NENS 08—2006 2
This document has been prepared for guidance purposes only by a working group made up
of:
Paul Tester Powerlink Qld Queensland
Shane Eeles Western Power Western Australia
Brent McKillop Transend Tasmania
Matt Clement Aurora Energy Tasmania
David Turner TransGrid NSW
Mark Carroll Ergon Energy Queensland
Steve Duke Power and Water Corp Northern Territory
Mal Cooper ETSA Utilities South Australia
Greg Bartlett ENERGEX Queensland
These Guidelines are the first issue of the National Guidelines for Aerial Surveillance of
Overhead Electricity Networks and were developed by the working group. Members of the
working group were able to draw on the expertise and experience of the participating
Network Operators, Service Providers and Regulatory Bodies as well as the practices of
other Australian and overseas Authorities.
These Guidelines set out minimum industry standards. They are advisory only and do not
substitute for, or override, any legislation, regulation or safety rules implemented by
jurisdictional regulators or Network Operators.
Members of the Electricity Supply Association of Australia Limited (ESAA) are not bound
in any way to accept the contents for inclusion in their work practices or procedures. Nor
does the ESAA or any of its members accept legal responsibility for the content of this
document. It is acknowledged that different practices from these described may be equally
satisfactory and safe.
These Guidelines include terminology that could appear unfamiliar to some sectors of the
Electricity Supply Industry, however, the terms adopted have been selected on their general
usage and acceptability.
The Guidelines include mandatory and advisory provisions and are formulated in such a
way that, depending on statutory requirements, sections that use the word ‘shall’ provide
mandatory provisions and sections that use the word ‘should’ provide advisory or
discretionary provisions.
The use of italics indicates the word or words are as defined in these Guidelines.
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3 ENA NENS 08—2006
CONTENTS
Page
1 OBJECTIVES............................................................................................................. 4
2 SCOPE........................................................................................................................ 4
3 REFERENCED DOCUMENTS.................................................................................. 4
4 DEFINITIONS............................................................................................................ 5
5 AIRCRAFT SERVICE PROVIDER ........................................................................... 6
6 REQUIREMENTS FOR AIRCRAFT ......................................................................... 6
7 PERSONNEL SELECTION, TRAINING AND AUTHORISATION......................... 7
8 RESPONSIBILITIES.................................................................................................. 9
9 AIRCRAFT OPERATIONS...................................................................................... 10
10 REFUELLING OPERATIONS................................................................................. 12
11 COMMUNICATION SYSTEMS.............................................................................. 12
12 AERIAL SURVEILLANCE .................................................................................... 12
13 SEPARATION DISTANCES FOR AERIAL SURVEILLANCE WORK................. 13
14 SAFETY CONSIDERATIONS/REQUIREMENTS.................................................. 14
15 INCIDENTS OR EVENTS ....................................................................................... 15
16 PROCEDURES FOR RESPONDING TO INCIDENTS OR EVENTS..................... 16
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ENA NENS 08—2006 4
COPYRIGHT
Energy Networks Association
National guidelines for aerial surveillance of overhead electricity networks
1 OBJECTIVES
The objective of these Guidelines is to support the Electricity Supply Industry in the
development of appropriate safe working processes for aerial surveillance of Overhead
Electricity Networks.
The principles within these Guidelines may be enhanced or supplemented provided this
does not result in reduced safety standards.
These Guidelines are intended to:
(a) ensure the safety of pilot, monitor(s) and the general public;
(b) specify the minimum standards required for aerial surveillance of Overhead Electricity
Networks; and
(c) assist Network Operators to develop work procedures and related training and
awareness programs.
2 SCOPE
These Guidelines apply to aerial surveillance of Overhead Electricity Networks. They shall
be applied in the context that:
(a) Appropriate workplace hazard and risk assessments are carried out and documented.
(b) The Minimum Separation Distances (MSD) and Maximum Work Distances (MWD)
used for aerial surveillance are appropriate for the type of work to be performed.
(Refer to Section 13).
(c) Other Guidelines applicable to particular work processes are to be used.
While the principles of aerial surveillance of Overhead Electricity Networks contained in
these Guidelines have been written in relation to work near overhead lines, the concepts
may be equally applicable to work in other areas such as aerial surveillance of
communication and control equipment, when combined with appropriate training and work
controls.
These Guidelines do not constitute a training manual for aerial surveillance of Overhead
Electricity Networks nor do they set down procedures for aerial surveillance of Overhead
Electricity Networks. Procedures shall be developed by the Network Operator and/or
Service Provider in accordance with the principles contained in these Guidelines.
These Guidelines exclude:
(i) low voltage and high voltage line work; and
(ii) high voltage live line work.
3 REFERENCED DOCUMENTS
3.1 ESAA Codes and Guidelines
ESAA NENS 01-2001: National Electricity Network Safety Code
ESAA NENS 02-2001: National Electricity Network Operator and Service Provider
Safety Assurance Guidelines
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5 ENA NENS 08—2006
COPYRIGHT
ESAA NENS 04-2003: National Guidelines for Safe Approach Distances to Electrical
and Mechanical Apparatus
ESAA ND/NL 04-1995: Guidelines for the use of helicopters for live line work.
3.2 Other referenced documents
Civil Aviation Act and associated Regulations.
ATSB accident/incident investigation – final reports. http://www.atsb.gov.au
Electricity Association of NSW Guide to aerial inspection and patrol of overhead power
lines. ISSC 10 November 2001.
4 DEFINITIONS
This section gives a list of words and terms and their definitions as used in these
Guidelines. Each defined word or term has its definition set alongside. When the defined
word or term is shown in italics in the text of the Guidelines, it has the defined meaning.
Where a defined word or term is not printed in italics in the body of the text, it must be
interpreted as the context of the text indicates or requires.
‘Aerial Surveillance Work’ means an inspection and/or patrol of Overhead Electricity
Networks by aircraft between the Minimum Separation Distance and Maximum Work
Distance as specified in these Guidelines.
‘Aerial Surveillance Zone (ASZ)’ means the area between the Minimum Separation
Distance and the Maximum Work Distance in which Aerial Surveillance Work is conducted.
‘AGL’ means Above Ground Level
‘Approved’ means having appropriate organisation endorsement in writing for a specific
function.
‘Authorised Person’ means a person with technical knowledge or sufficient experience
who has been approved, or has the delegated authority to act on behalf of the Network
Operator, to perform the duty concerned.
‘CASA’ means Civil Aviation Safety Authority.
‘Competent’ means having the skills, knowledge and attributes a person needs to complete
a task.
‘Electrical Apparatus’ means any electrical equipment, including overhead lines and
underground cables, the conductors of which are live or can be made live.
‘Emergency Location Transmitter (ELT)’ means a device set to initiate signalling in the
event of an emergency.
‘Employee’ means a worker engaged by a Network Operator and/or Service Provider
(whether under a contract of employment or apprenticeship) and includes a contractor or
sub-contractor, and a person employed by a contractor or sub-contractor, who carries out
work for a Network Operator and/or Service Provider.
‘Intercom’ means the aircraft internal communication system.
‘Live’ means energised or subject to hazardous induced or capacitive voltages.
‘Maximum Work Distance (MWD)’ means the outer limit of the Aerial Surveillance Zone.
‘Minimum Separation Distance (MSD)’ means the distance from the Overhead Electricity
Network that no part of the aircraft shall encroach.
‘Monitor(s)’ means all person(s) required to observe and document the outcomes of the
surveillance of Overhead Electricity Networks from an aircraft.
‘Network Operator’ means the owner, controller or operator of an electricity network.
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