ISO 19642-11:2023

Road vehicles — Automotive cables — Part 11: Dimensions and requirements for coaxial RF cables with a specified analogue bandwidth up to 6 GHz (20 GHz)

This document specifies the dimensions and requirements for coaxial radio frequency (RF) cables with a specified analogue bandwidth up to 6 GHz (for special cases up to 20 GHz) intended for use in road vehicle applications where the nominal system voltage is 30 V a.c. or 60 V d.c.

Véhicules routiers — Câbles automobiles — Partie 11: Dimensions et exigences des câbles RF coaxiaux de bande passante analogique spécifiée jusqu'à 6 GHz (20 GHz)

General Information

• Status: Published
• Publication Date: 25-May-2023
• ICS: 43.040.10 - Electrical and electronic equipment
• Technical Committee: ISO/TC 22/SC 32 - Electrical and electronic components and general system aspects
• Drafting Committee: ISO/TC 22/SC 32/WG 4 - Automotive electrical cables
• Current Stage: 6060 - International Standard published
• Start Date: 26-May-2023
• Due Date: 11-Mar-2023
• Completion Date: 26-May-2023

Overview

ISO 19642-11:2023 - Road vehicles - Automotive cables - Part 11 defines dimensions and requirements for coaxial RF cables intended for road-vehicle use with a nominal system voltage of 30 V a.c. or 60 V d.c.. It covers coaxial radio‑frequency (RF) cables with a specified analogue bandwidth up to 6 GHz (with special cases up to 20 GHz) and sets out the tests, construction, and performance criteria needed for reliable in-vehicle RF signal transmission.

Keywords: ISO 19642-11, automotive coaxial RF cables, road vehicles, RF cable requirements, 6 GHz, 20 GHz

Key topics and technical requirements

The standard details comprehensive technical areas including:

• Scope and general specifications: voltage rating, temperature classes, cable construction principles for automotive use.
• Dimensional requirements: conductor, dielectric core, overall cable and sheath diameters, ovality and lay length.
• Electrical testing:
  • Low-frequency: conductor resistance, capacitance, inductance, insulation resistance.
  • RF-specific: characteristic impedance (time and frequency domain), insertion loss (IL), return loss (RL), velocity of propagation, screening effectiveness.
  • Crosstalk measures: NEXT, FEXT and alien crosstalk metrics.
• Mechanical tests: stripping force, breaking force, cyclic and dynamic bending, minimum bending radius, abrasion resistance.
• Environmental tests: long- and short-term heat ageing, thermal overload, pressure/high-temperature tests, cold impact, humidity/temperature cycling, resistance to liquids, ozone, flame propagation and marking durability.
• Screening and sheath requirements: electrical continuity, sheath fault testing and resistance unbalance checks.
• Testing protocols and representative construction testing: reference to ISO 19642-2 for some test methods.

Practical applications and who uses this standard

ISO 19642-11 is used by:

• Automotive OEMs and Tier‑1 suppliers specifying in‑vehicle RF cabling for antenna feeds and RF signal paths.
• Cable designers and manufacturers to validate construction, electrical performance and environmental durability.
• Test laboratories and qualification engineers performing compliance and reliability testing.
• EMC and systems engineers ensuring shielding, impedance control and low loss for infotainment, telematics and other vehicle RF systems.

Related standards

• Other parts of the ISO 19642 series (ISO 19642-2 is referenced in the document for test methods).
• Industry test and electromagnetic compatibility (EMC) standards as applicable for vehicle RF systems.

ISO 19642-11 helps ensure consistent, validated performance of automotive coaxial RF cables - reducing integration risk and improving RF signal integrity in modern road vehicles.

Standards Content (Sample)

INTERNATIONAL ISO
STANDARD 19642-11
First edition
2023-05
Road vehicles — Automotive cables —
Part 11:
Dimensions and requirements for
coaxial RF cables with a specified
analogue bandwidth up to 6 GHz (20
GHz)
Véhicules routiers — Câbles automobiles —
Partie 11: Dimensions et exigences des câbles RF coaxiaux de bande
passante analogique spécifiée jusqu'à 6 GHz (20 GHz)
Reference number
© ISO 2023
All rights reserved. Unless otherwise specified, or required in the context of its implementation, no part of this publication may
be reproduced or utilized otherwise in any form or by any means, electronic or mechanical, including photocopying, or posting on
the internet or an intranet, without prior written permission. Permission can be requested from either ISO at the address below
or ISO’s member body in the country of the requester.
ISO copyright office
CP 401 • Ch. de Blandonnet 8
CH-1214 Vernier, Geneva
Phone: [phone]
Email: [e-mail]
Website: www.iso.org
Published in Switzerland
ii
Contents Page
Foreword . vi
Introduction .vii
1 Scope . 1
2 Normative references . 1
3 Terms and definitions . 1
4 Specifications . 2
4.1 General test conditions . 2
4.2 Voltage rating . 2
4.3 Temperature classes . 2
4.4 Cable construction . 2
4.5 Safety concerns . 2
4.5.1 Core . 2
4.5.2 Dielectric core . 3
4.5.3 Screen . 3
4.5.4 Sheath . 3
4.6 Cable designation . 3
4.7 Testing of representative cable constructions . 3
4.8 Reference and requirements for the tests according ISO 19642-2 . 4
4.9 General remark on requirements . 4
5 Requirements for the conductor and dielectric . 4
5.1 General . 4
5.2 Dimensional tests . . 4
5.2.1 Dielectric core outside diameter . 4
5.2.2 Insulation thickness . 4
5.2.3 Conductor diameter . 4
5.2.4 Cross sectional area . . 4
5.2.5 In-process dielectric outside diameter . 4
5.3 Electrical tests . 5
5.3.1 Conductor resistance . . 5
5.3.2 Determination of temperature coefficients . 5
5.3.3 Withstand voltage . 5
5.3.4 Withstand voltage after environmental testing . 5
5.3.5 Insulation faults . 5
5.3.6 Insulation volume resistivity . 5
5.4 Mechanical tests . 5
5.4.1 Strip force (A) of dielectric . 5
5.4.2 Abrasion test . 5
5.4.3 Breaking force of the finished cable. 5
5.4.4 Cyclic bending test . 6
5.4.5 Flexibility test . 6
5.5 Environmental tests . 6
5.5.1 Test specimen preparation and winding tests . 6
5.5.2 Long term heat ageing, 3 000 h, at temperature class rating . 6
5.5.3 Short term heat ageing, 240 h at temperature class rating + 25 °C . 6
5.5.4 Thermal overload, 6 h at temperature class rating + 50 °C . . 6
5.5.5 Pressure test at high temperature . 6
5.5.6 Shrinkage by heat . 6
5.5.7 Low temperature winding . 6
5.5.8 Cold impact . 6
5.5.9 Temperature and humidity cycling . 6
5.5.10 Resistance to hot water . 6
5.5.11 Resistance to liquid chemicals . 6
iii
5.5.12 Durability of cable marking . 6
5.5.13 Stress cracking resistance . 7
5.5.14 Resistance to ozone . 7
5.5.15 Resistance to flame propagation . 7
6 Requirements for the screened and sheathed coaxial RF cable . 7
6.1 General . 7
6.2 Dimensional tests . . 7
6.2.1 Cable outside and inner layer diameters . 7
6.2.2 Ovality of sheath . 7
6.2.3 Thickness of sheath. 7
6.2.4 In-process cable outside diameter . 8
6.2.5 Lay length . 8
6.3 Electrical tests . 8
6.3.1 Electrical continuity . 8
6.3.2 Withstand voltage at final inspection . 8
6.3.3 Screening effectiveness . 8
6.3.4 Sheath fault on screened cables . 9
6.3.5 General information on electrical test setups of unscreened cables . 9
6.3.6 General information on low frequency electrical tests . 9
6.3.7 Resistance unbalance . 10
6.3.8 Capacitance . 10
6.3.9 Inductance . . 10
6.3.10 General information on radio frequency (RF) electrical tests . 10
6.3.11 Velocity of propagation . . 10
6.3.12 Characteristic impedance in frequency domain (CIF). 10
6.3.13 Characteristic impedance in time domain (CIT) . 11
6.3.14 Insertion loss, IL. 11
6.3.15 Return loss, RL .12
6.3.16 Unbalance attenuations .12
6.3.17 Near end crosstalk, NEXT .12
6.3.18 Far end crosstalk, FEXT .12
6.3.19 PS alien near end crosstalk, PS ANEXT – exogenous crosstalk .12
6.3.20 PS attenuation to alien far-end crosstalk ratio, PS AACR-F - exogenous
crosstalk . 12
6.4 Mechanical tests . 12
6.4.1 Strip force (C) of sheath .12
6.4.2 Cyclic bending .12
6.4.3 Flexibility .12
6.4.4 Cyclic bending test for RF cables .12
6.4.5 Dynamic bending tests for RF cables . 13
6.4.6 Test for assessment of minimum bending radius.13
6.4.7 Strip force (B) of screen . 14
6.4.8 Abrasion test on sheath . 14
6.5 Environmental tests . 14
6.5.1 Test specimen preparation and winding tests . 14
6.5.2 Long term heat ageing, 3 000 h at temperature class rating . 14
6.5.3 Short term heat ageing, 240 h at temperature class rating + 25 °C .15
6.5.4 Thermal overload, 6 h at temperature class rating + 50 °C . .15
6.5.5 Pressure test at high temperature . 15
6.5.6 Shrinkage of sheath by heat . 15
6.5.7 Low temperature winding . 15
6.5.8 Cold impact . 15
6.5.9 Temperature and humidity cycling . 16
6.5.10 Resistance to liquid chemicals . 16
6.5.11 Durability of sheath marking . 16
6.5.12 Resistance to ozone . 16
6.5.13 Artificial weathering . 16
6.5.14 Resistance to flame propagation . 16
iv
7 Test overview tables .17
8 Preferred cable types .21
8.1 Parameter tables . 21
8.2 Insertion loss IL (tables and diagrams), bending test sequences . 26
8.2.1 CX174a . 26
8.2.2 CX174b .28
8.2.3 CX174c .29
8.2.4 CX174d .30
8.2.5 CX174e . 32
8.2.6 CX58a .34
8.2.7 CX58b . 35
8.2.8 CX58c . 36
8.2.9 CX31a .38
8.2.10 CX44a, CX44b . 39
8.2.11 CX44c .40
8.2.12 CX501a . . 42
8.2.13 CX501b . 43
8.2.14 CX501c .44
8.2.15 CX502a.46
8.2.16 CX502b . 47
8.2.17 CX502c .48
8.2.18 CX502d . 50
8.2.19 CX751a . 51
8.2.20 CX751b . 52
8.2.21 CX751c .54
Bibliography .56
v
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards
bodies (ISO member bodies). The work of preparing International Standards is normally carried out
through ISO technical committees. Each member body interested in a subject for which a technical
committee has been established has the right to be represented on that committee. International
organizations, governmental and non-governmental, in liaison with ISO, also take part in the work.
ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of
electrotechnical standardization.
The procedures used to develop this document and those intended for its further maintenance are
described in the ISO/IEC Directives, Part 1. In particular, the different approval criteria needed for the
different types of ISO document should be noted. This document was drafted in accordance with the
editorial rules of the ISO/IEC Directives, Part 2 (see www.iso.org/directives).
ISO draws attention to the possibility that the implementation of this document may involve the use
of (a) patent(s). ISO takes no position concerning the evidence, validity or applicability of any claimed
patent rights in respect thereof. As of the date of publication of this document, ISO had not received
notice of (a) patent(s) which may be required to implement this document. However, implementers are
cautioned that this may not represent the latest information, which may be obtained from the patent
database available at www.iso.org/patents. ISO shall not be held responsible for identifying any or all
such patent rights.
Any trade name used in this document is information given for the convenience of users and does not
constitute an endorsement.
For an explanation of the voluntary nature of standards, the meaning of ISO specific terms and
expressions related to conformity assessment, as well as information about ISO's adherence to
the World Trade Organization (WTO) principles in the Technical Barriers to Trade (TBT), see
www.iso.org/iso/foreword.html.
This document was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 32,
Electrical and electronic components and general system aspects.
A list of all parts in the ISO 19642 series can be found on the ISO website.
Any feedback or questions on this document should be directed to the user’s national standards body. A
complete listing of these bodies can be found at www.iso.org/members.html.
vi
Introduction
This document has been added to existing standards in the ISO 19642 series. It was prepared following
a joint resolution to improve the general structure of the ISO automotive electric cable standards. This
new structure adds more clarity and, by defining a new standard family, opens up the standard for
future amendments.
Many other standards currently refer to ISO 6722-1, ISO 6722-2 and ISO 14572. Therefore, these
standards will stay valid at least until the next scheduled systematic review and will be replaced later
on by the ISO 19642 series.
For new automotive cable projects customers and suppliers are advised on using the ISO 19642 series.
vii
INTERNATIONAL STANDARD ISO 19642-11:2023(E)
Road vehicles — Automotive cables —
Part 11:
Dimensions and requirements for coaxial RF cables with a
specified analogue bandwidth up to 6 GHz (20 GHz)
WARNING — The use of this document may involve hazardous materials, operations, and
equipment. This document does not purport to address all of the safety concerns, if any, associated
with its use. It is the responsibility of the user of this document to establish appropriate safety
practices and determine the applicability of regulatory limitations prior to use.
1 Scope
This document specifies the dimensions and requirements for coaxial radio frequency (RF) cables with
a specified analogue bandwidth up to 6 GHz (for special cases up to 20 GHz) intended for use in road
vehicle applications where the nominal system voltage is 30 V a.c. or 60 V d.c.
2 Normative references
The following documents are referred to in the text in such a way that some or all of their content
constitutes requirements of this document. For dated references, only the edition cited applies. For
undated references, the latest edition of the referenced document (including any amendments) applies.
ISO 19642-1, Road vehicles — Automotive cables — Terminology and design guidelines
1)
ISO 19642-2:— , Road vehicles — Automotive cables — Test methods
IEC 62153-4-3, Metallic communication cable test methods — Part 4-3: Electromagnetic compatibility
(EMC) - Surface transfer impedance — Triaxial method
IEC 62153-4-4, Metallic communication cable test methods — Part 4-4: Electromagnetic compatibility
(EMC) — Test method for measuring of the screening attenuation as up to and above 3 GHz, triaxial method
ASTM B452, Standard Specification for Copper-Clad Steel Wire for Electronic Application
ASTM B105, Standard Specification for Hard-Drawn Copper Alloy Wires for Electric Conductors
CEN/TS 13388,Copper and copper alloys — Compendium of compositions and products
3 Terms and definitions
For the purposes of this document, the terms and definitions given in ISO 19642-1 apply.
ISO and IEC maintain terminology databases for use in standardization at the following addresses:
— ISO Online browsing platform: available at https:// www .iso .org/ obp
— IEC Electropedia: available at https:// www .electropedia .org/
1) Second edition under preparation. Stage at the time of publication: ISO/PRF 19642-2:2023.
4 Specifications
4.1 General test conditions
2)
The test conditions given in ISO 19642-2:— , 4.1 shall apply. The descriptions of the tests are found
in ISO 19642-2. This document only contains requirements and specific remarks. The cables shall be
submitted to the tests as specified in Clause 7.
If the supplier and the customer agree upon modifications or changes to the methods and requirements,
it is required that all the changes and modifications are clearly documented.
NOTE The clause numbers in this document are aligned with the clause numbers in ISO 19642-2. Test clause
numbers not needed in this document are identified as “Test is not required” or “Test is not possible”.
4.2 Voltage rating
The voltage rating is established by the rating of the cores 30 V a.c. or 60 V d.c.
4.3 Temperature classes
The temperature class rating is established by the rating(s) of the core and sheath. The rating of the
cable shall be equal to the lowest rating of the core and sheath. For details on temperature classes, see
ISO 19642-1.
4.4 Cable construction
For detailed information on preferred constructions, see Tables 12 to 15.
Other constructions and materials are permissible when agreed between customer and supplier.
4.5 Safety concerns
See the “Warning" at the beginning of this document.
4.5.1 Core
4.5.1.1 Conductor
4.5.1.1.1 Conductor material
For preferred conductor materials see ISO 19642-3:2019, Table 1. Additional materials such as copper
clad steel (CCS) shall be according to ASTM B452 and copper alloys shall be according to ASTM B105 or
CEN/TS 13888.
4.5.1.1.2 Conductor construction
For preferred conductors of the core, see ISO 19642-3. Conductor materials as well as other conductors
may be used as agreed between the customer and the supplier.
4.5.1.1.3 Conductor diameter
For construction requirements of preferred cable types please refer to Tables 12 to 15.
2) Second edition under preparation. Stage at the time of publication: ISO/DIS 19642-2:2023.
4.5.2 Dielectric core
4.5.2.1 Insulation material
The insulation material shall be documented.
4.5.2.2 Dielectric core outside diameter
Please refer to Tables 12 to 15.
4.5.3 Screen
4.5.3.1 Screen construction
The screen shall consist of at least one metallic braid. Additionally, the use of metal foils, single or
double-sided metal layered polymer foils is allowed. The metal foil shall be between the dielectric
and the braid. A metallic side of the foil shall be in electrical contact to the braid. For construction
requirements of cable types please refer to Tables 12 to 15.
4.5.3.2 Diameter under sheath
For construction requirements of cable types please refer to Tables 12 to 15.
4.5.4 Sheath
4.5.4.1 Sheath material
The sheath material shall be documented.
4.5.4.2 Sheath thickness
For construction requirements of preferred cable types please refer to Tables 12 to 15.
4.5.4.3 Outside cable diameter
For construction requirements of preferred cable types please refer to Tables 12 to 15
4.6 Cable designation
The cable designation is established or determined using the fields according to Table 1. The entries
follow the example.
EXAMPLE CX174a.
Table 1 — Cable designator fields
CX for coaxial cable
174 an up to 3-digit reference number to identify similar cable types
a a lower-case version designator to differentiate between similar constructions
For cable designators of preferred cable types refer to Tables 12 to 15.
4.7 Testing of representative cable constructions
When a test is required in Clause 7, all cable constructions shall meet the requirements. However, if
testing of representative cable constructions is permitted by agreement between customer and supplier,
conformity for a cable family may be demonstrated by testing samples of selected cable types only.
Conformity of a cable family made of the same insulation and sheath compound may be demonstrated
by testing the sample of the cable family with the smallest sheath wall thickness only. Resistance to
flame propagation 6.5.14 shall be performed on all sheathed finished cables. RF testing according to
Table 10 is required for all members of the cable family.
4.8 Reference and requirements for the tests according ISO 19642-2
All tests are defined in ISO 19642-2. This document only contains requirements and specific remarks.
4.9 General remark on requirements
Requirements are specified in Tables 12 to 15 for the preferred coaxial RF cable types. The requirements
for other coaxial RF cable types shall be as agreed between customer and supplier.
5 Requirements for the conductor and dielectric
5.1 General
The conductor and dielectric shall fulfil the requirements per the tests as specified in Table 8 according
to its temperature class rating.
The details of the usage of "If required” tests shall be as agreed between customer and supplier. Both
have to define:
1) if the test has to be performed;
2) if the test has to be performed for gathering data without a limit;
3) a mandatory limit.
Numbers and titles in this clause are aligned with the tests defined in ISO 19642-2 giving an implicit
reference. Tests not required for this document are identified as "Test is not required" or "Test is not
possible".
5.2 Dimensional tests
5.2.1 Dielectric core outside diameter
No single value shall be outside the specified values in Tables 12 to 15.
5.2.2 Insulation thickness
Test is not required.
5.2.3 Conductor diameter
No single value shall be outside the specified values Tables 12 to 15.
5.2.4 Cross sectional area
Test is not required.
5.2.5 In-process dielectric outside diameter
In-process dielectric outside diameter monitoring is mandatory. No single value shall be outside the
specified values in Tables 12 to 15.
5.3 Electrical tests
5.3.1 Conductor resistance
No single value shall be outside the specified values in Tables 12 to 15.
5.3.2 Determination of temperature coefficients
Test is not required.
5.3.3 Withstand voltage
Test is not required.
5.3.4 Withstand voltage after environmental testing
5.3.4.1 Test voltage
The test voltage is 1 kV a.c., hold for 1 min.
5.3.4.2 Requirement
Breakdown shall not occur.
5.3.5 Insulation faults
5.3.5.1 Test voltage
The test voltage is 1 kV a.c.
5.3.5.2 Requirement
Breakdown shall not occur.
5.3.6 Insulation volume resistivity
The usage of this test shall be as agreed between customer and supplier. In this case the value shall be
≥ 1 × 10 Ω × mm.
5.4 Mechanical tests
5.4.1 Strip force (A) of dielectric
The usage of this test shall be as agreed between customer and supplier. In this case measure the strip
force between inner conductor and dielectric cable insulation. The measured force shall be within the
values as agreed between customer and supplier.
5.4.2 Abrasion test
Test is not required.
5.4.3 Breaking force of the finished cable
Test is not required.
5.4.4 Cyclic bending test
Test is not required.
5.4.5 Flexibility test
Test is not required.
5.5 Environmental tests
5.5.1 Test specimen preparation and winding tests
Test does not apply.
5.5.2 Long term heat ageing, 3 000 h, at temperature class rating
Test is not required.
5.5.3 Short term heat ageing, 240 h at temperature class rating + 25 °C
Test is not required.
5.5.4 Thermal overload, 6 h at temperature class rating + 50 °C
Test is not required.
5.5.5 Pressure test at high temperature
Test is not required.
5.5.6 Shrinkage by heat
The maximum shrinkage shall not exceed 2 mm from either end.
5.5.7 Low temperature winding
Test is not required.
5.5.8 Cold impact
Test is not required.
5.5.9 Temperature and humidity cycling
Test is not required.
5.5.10 Resistance to hot water
Test is not required.
5.5.11 Resistance to liquid chemicals
Test is not required.
5.5.12 Durability of cable marking
Test is not required.
5.5.13 Stress cracking resistance
This test is to be performed for cables with insulation materials that are prone to environmental stress
cracking problems (e.g. FEP and ETFE) by agreement between customer and supplier. After the test no
conductor shall be visible. During 5.3.4 breakdown shall not occur.
5.5.14 Resistance to ozone
Test is not required.
5.5.15 Resistance to flame propagation
Test is not required.
6 Requirements for the screened and sheathed coaxial RF cable
6.1 General
The finished cable shall be submitted to the tests as specified in Table 9 and Table 10.
Numbers and titles in this clause are aligned with the tests defined in ISO 19642-2 giving an implicit
reference. Tests not required for this part are intentionally omitted in this document.
The details of the usage of "If required” tests shall be as agreed between customer and supplier. Both
shall define:
1) if the test shall be performed;
2) if the test shall be performed for gathering data without a limit;
3) a mandatory limit.
6.2 Dimensional tests
6.2.1 Cable outside and inner layer diameters
Measure the following parameters:
— dielectric core outside diameter;
— diameter under sheath;
— outside cable diameter.
No single value shall be outside the specified values in Tables 12 to 15.
6.2.2 Ovality of sheath
The usage of this test shall be as agreed between customer and supplier. In this case the value of ovality
shall be < 10 % measured immediately after extrusion.
NOTE Sheath ovality can be different after handling due to mechanical deformation.
6.2.3 Thickness of sheath
No single value shall be outside the specified values in Tables 12 to 15.
6.2.4 In-process cable outside diameter
In-process cable outside diameter monitoring is mandatory. No single value shall be outside the
specified values in Tables 12 to 15.
6.2.5 Lay length
Test is not possible.
6.3 Electrical tests
6.3.1 Electrical continuity
The indicator shall show continuity.
6.3.2 Withstand voltage at final inspection
6.3.2.1 Test voltage
The test voltage is 1 kV a.c. between the conductor and the screen for a minimum of 3 s.
6.3.2.2 Requirement
Breakdown shall not occur.
6.3.3 Screening effectiveness
6.3.3.1 General
The usage of these tests shall be as agreed between customer and supplier.
6.3.3.2 DC resistance of the screen
The requirement for this test shall be as agreed between customer and supplier.
6.3.3.3 Surface transfer impedance — Triaxial method
The test shall be performed according to IEC 62153-4-3, method C: (mismatched)-short-short without
damping resistor:
— coupling length: 400 mm;
— length of DUT: length of triaxial tube + 500 mm;
— frequency range: 10 kHz – 30 MHz.
The test report shall contain:
— length of test tube;
— coupling length;
— inner diameter of test tube;
— impedance of outer system;
— cut off frequency of electrically short system;
— graphical representation of test result over the specified frequency range.
The requirement for this test shall be as agreed between customer and supplier.
6.3.3.4 Screening attenuation — Absorbing clamp method
Test is not required.
6.3.3.5 Screening attenuation — Triaxial method
The test shall be performed according to IEC 62153-4-4:
— coupling length > 2 500 mm;
— length of DUT: length of triaxial tube + 500 mm;
— frequency range: 30 MHz – 6 GHz.
The test report shall contain:
— length of test tube;
— coupling length;
— inner diameter of test tube;
— impedance of outer system;
— cut off frequency of electrically long system;
— graphical representation of screening attenuation over the specified frequency range;
— additional graphical representation of 150 Ω normalized screening attenuation over the specified
frequency range.
The requirement for this test shall be as agreed between customer and supplier.
6.3.3.6 Coupling attenuation — Triaxial method
Test is not possible.
6.3.4 Sheath fault on screened cables
6.3.4.1 Test voltage
The test voltage is 3 kV a.c.
6.3.4.2 Requirement
Breakdown shall not occur.
6.3.5 General information on electrical test setups of unscreened cables
Test is not possible.
6.3.6 General information on low frequency electrical tests
The measurement is performed at room temperature either on a new cable which was not subjected
to any prior environmental stress or to a cable after applied stress according to the requirement in
Table 11 and subsequent environmental test descriptions. At least three test specimens shall be
measured.
6.3.7 Resi
...