International Telecommunication Union
ITU-T Study Group 5
Publications
Greg Jones
ITU Telecommunication Standardization Bureau
greg.jones@itu.int
Seminar on Impact of Electromagnetic Field Emissions
Kampala, Uganda, 3-5 September 2003
ITU-T Study Group 5
“Protection against electromagnetic environment effects”
o Handbooks
o Directives
o ITU-T K-series Recommendations
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
2
Guide to the use of ITU-T SG5
Publications …
o
o
1 Scope and objective
2 Terminology and abbreviations
•
•
o
o
2.1 Terminology
2.2 Abbreviations
3 Reference configuration
4 Electromagnetic compatibility requirements for
telecommunication equipment and installations
•
•
4.1 General
4.2 EMC requirements for telecommunication equipment and
installations in telecommunication centres and at radio
installations
• 4.3 EMC requirements for telecommunication equipment and
installations a outdoor locations
•
•
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
•
o
4.3.1 Telecommunication equipment
4.3.2 Telecommunication lines
4.4 EMC requirements for telecommunication equipment
used at customer premises
ANNEX - Title and abstract of ITU-T Recommendations of the
K-series and other relevant Publications
3
Scope and responsibilities of
the guide
ITU-T
ITU-R
ITU-D
SG 5
Recommendations
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
Other publications
calculation/estimation
testing/measuring
emission
resistibility/immunity
protection/mitigation
safety
4
T0507600-97
Reference configuration
outdoor location
fibre or
metallic line
equipment
radio
installation
customer
premises
T0507610-97
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
telecommunication
centre
5
Locations
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
o Equipment (Table 1)
• Telecommunication centres
• Radio installations
• Outdoor locations
o Telecommunication lines (Table 2)
• Outdoor locations
o Equipment (Table 3)
• Customer premises
6
Phenomena relating to
equipment
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
o Power supply effects
• Safety, resistability, immunity, mitigation
o High frequency effects
• Immunity, mitigation, Emmission
o EFT – Electrical Fast Transient
• Resistability, immunity
o Lightning
• Resistability, immunity
o ESD – Electrostatic Discharge
• Resistability, immunity
7
Phenomena relating to
telecommunication lines
o Power supply effects and low
frequency interference
• safety, resistibility, immunity
o High frequency induction
• immunity, mitigation, emission
o Lightning
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
• resistibility, protection
8
Phenomena relating to
customer equipment
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
o Power supply effects
• resistability, immunity, mitigation
o High frequency effects
• Immunity, emission
o EFT – Electrical Fast Transient
• Resistability, immunity
o Lightning
• Resistability, immunity
o ESD – Electrostatic Discharge
• Immunity
9
Types and subjects of
publications
o Basic
• general, Calculation/estimation,
testing/measuring
o Generic
o Protection or mitigation
• Overhead pairs, buried cable with
metal pairs, optical fibre cable
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
o Safety
10
ITU-T SG5 Handbooks
o Earthing of Telecommunication Installations
(1976)
o Guide to the use of ITU-T SG5 Publications
o Interference Measurement Techniques (2002)
o The Protection of Telecommunication Lines
and Equipment Against Lightning Discharges
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
• Chapters 1 to 5 (1974)
• Chapters 6, 7 and 8 (1978)
• Chapters 9 and 10 (1994)
11
Directives
Directives Concerning the Protection of
Telecommunication Lines against Harmful Effects from
Electric Power and Electrified Railway Lines
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
Vol I Design, construction and operational principles of
telecommunication, power and electrified railway
facilities
Vol II Calculating induced voltages and currents in practical
cases
Vol III Capacitive, inductive and conductive coupling:
physical theory and calculation methods
Vol IV: Inducing currents and voltages in electrified
railway systems
Vol V Inducing currents and voltages in power transmission
and distribution systems
Vol VI Danger and disturbance
Vol VII Protective measures and safety precautions
Vol VIII Protective devices
Vol IX Testing methods and measuring apparatus
12
Examples of ITU-T K-Series
Recommendations
Human exposure to EMF
o
K.52 (02/00) Guidance on complying with limits for
human exposure to electromagnetic fields
Resistability
K.20 (02/00) Resistibility of telecommunication
equipment installed in a telecommunications centre to
overvoltages and overcurrents
o K.21 (10/00) Resistibility of telecommunication
equipment installed in customer's premises to
overvoltages and overcurrents
o K.44 (02/00) Resistibility tests of telecommunication
equipment exposed to overvoltages and overcurrents –
Basic Recommendation
o K.45 (02/00) Resistibility of access network equipment
to overvoltages and overcurrents
o
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
13
ITU-T K-Series Recommendations
approved in July 2003
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
K.20 Resistibility of Telecommunication Equipment installed in a
Telecommunications Centre to Overvoltages and Overcurrents
K.21 Resistibility of Telecommunication Equipment installed in
Customer Premises to Overvoltages and Overcurrents
K.34 Classification of electromagnetic environmental conditions
for telecommunication equipment - Basic EMC
Recommendation
K.43 Immunity Requirements for Telecommunication Equipment
K.44 Resistibility tests for Telecommunication Equipment exposed
to overvoltages and overcurrents - Basic Recommendation
K.45 Resistibility of Telecommunication Equipment installed in
the Access and Trunk Networks to Overvoltages and
Overcurrents
K.46 Protection of Telecommunication Lines using Metallic
Symmetric Conductors against Lightning Induced Surges
K.48 EMC requirements for each telecommunication Equipment product family recommendation
14
Recently approved ITU-T KSeries Recommendations
o K.56 Protection of radio base stations
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
against lightning discharges
o K.58 EMC, Resistibility and Safety
Requirements and Procedures for Colocated Telecommunication Installations
o K.59 EMC, Resistibility and Safety
Requirements and Procedure for
Connection to Unbundled Cables
o K.60 Emission limits and test methods for
Telecommunication Networks
15
ITU-T K-Series Recommendations
under approval
o K.57 Protection Measures for Radio Base
Stations sited on Power Line Towers
o K.61 Guidance to measurement and
numerical prediction of electromagnetic
fields for compliance with human exposure
limits for telecommunication installations
AAP Review period ends 5 September 2003
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
16
ITU-T K-Series
Recommendations
o The following slides are included for
reference only and do not form part
of the presentation
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
17
K-series Recommendations
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
K.5 Joint use of poles for electricity distribution and
for telecommunications
K.6 Precautions at crossings
K.7 Protection against acoustic shock
K.8 Separation in the soil between
telecommunication cables and earthing system of
power facilities
K.9 Protection of telecommunication staff and
plant against a large earth potential due to a
neighbouring electric traction line
K.10 Low frequency interference due to unbalance
about earth of telecommunication equipment
K.11 Principles of protection against overvoltages
and overcurrents
18
K-series Recommendations
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
K.12 Characteristics of gas discharge tubes for the
protection of telecommunications installations
K.13 Induced voltages in cables with plasticinsulated conductors
K.14 Provision of a metallic screen in plasticsheathed cables
K.15 Protection of remote-feeding systems and line
repeaters against lightning and interference from
neighbouring electricity lines
K.17 Tests on power-fed repeaters using solid-state
devices in order to check the arrangements for
protection from external interference
K.18 Calculation of voltage induced into
telecommunication lines from radio station
broadcasts and methods of reducing interference
K.19 Joint use of trenches and tunnels for
telecommunication and power cables
19
K-series Recommendations
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
K.20 Resistibility of telecommunication equipment
installed in a telecommunications centre to
overvoltages and overcurrents
K.21 Resistibility of telecommunication equipment
installed in costumer's premises to overvoltages
and overcurrents
K.22 Overvoltage resistibility of equipment
connected to an ISDN T/S bus
K.23 Types of induced noise and description of noise
voltage parameters for ISDN basic user networks
K.24 Method for measuring radio-frequency
induced noise on telecommunications pairs
K.25 Protection of optical fibre cables
K.26 Protection of telecommunication lines against
harmful effects from electric power and
electrified railway lines
20
K-series Recommendations
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
K.27 Bonding configurations and earthing inside a
telecommunication building
K.28 Characteristics of semi-conductor arrester
assemblies for the protection of
telecommunications installations
K.29 Coordinated protection schemes for
telecommunication cables below ground
K.30 Positive temperature coefficient (PTc)
thermistors
K.31 Bonding configurations and earthing of
telecommunication installations inside a
subscriber's building
K.33 Limits for people safety related to coupling
into telecommunications system from a.c.
electric power and a.c. electrified railway
installations in fault conditions
21
K-series Recommendations
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
K.34 Classification of electromagnetic
environmental conditions for telecommunication
equipment - Basic EMC Recommendation
K.35 Bonding configurations and earthing at remote
electronic sites
K.36 Selection of protective devices
K.37 Low and high frequency EMC mitigation
techniques for telecommunication installations
and systems - Basic EMC Recommendation
K.38 Radiated emission test procedure for
physically large systems
K.39 Risk assessment of damages to
telecommunication sites due to lightning
discharges
K.40 Protection against LEMP in telecommunications
centres
22
K-series Recommendations
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
K.41 Resistibility of internal interfaces of
telecommunication centres to surge overvoltages
K.42 Analytical method to calculate visibility
statistics for non-geostationary satellite orbit
satellites as seen from a point on the Earth's
surface
K.43 Immunity requirements for telecommunication
equipment
K.44 Resistibility of telecommunication equipment
to overvoltages and overcurrents
K.45 Resistibility of access network equipment to
overvoltages and overcurrents
K.46 Protection of telecommunication lines using
metallic symmetric conductors against lightning
induced surges
K.47 Protection of telecommunication lines using
metallic conductors against direct lightning
23
discharges
K-series Recommendations
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
K.48 EMC requirements for each telecommunication
network equipment - Product family
Recommendation
K.49 Test condition and performance criteria for
voice terminal subject to disturbance from
digital mobile phone
K.50 Safe limits of operating voltages and currents
for telecommunication systems powered over the
network
K.51 Safety criteria for telecommunication
equipment
K.52 Guidance on complying with limits for human
exposure to electromagnetic fields
K.53 Values of induced voltages on
telecommunication installations to establish
telecom and a.c. power and railway operators
responsibilities
24
K-series Recommendations
Seminar on
Impact of
Electromagnetic
Field Emissions
Kampala, Uganda
3-5 September 2003
K.54 Conducted immunity test method and level at
fundamental power frequencies
K.55 Overvoltage and overcurrent requirements for
insulation displacement connectors (IDC)
terminations
K.56 Protection of radio base stations against
lightning discharges
K.58 EMC, resistibility and safety requirements and
procedures for co-located telecommunication
installations
K.59 EMC, resistibility and safety requirements and
procedure for connection to unbundled cables
K.60 Emission limits and test methods for
telecommunication networks
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