EN 50397-1:2006

Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV a.c. and not exceeding 36 kV a.c. - Part 1: Covered conductors

This Part 1 contains the requirements for covered conductors with or without integrated longitudinal watertightness and/or semi-conductive conductor screen for applications in overhead lines with rated voltages U above 1 kV a.c. and not exceeding 36 kV a.c.

Kunststoffumhüllte Leiter und zugehörige Armaturen für Freileitungen mit Nennspannungen über 1 kV und nicht mehr als 36 kV Wechselspannung - Teil 1: Kunststoffumhüllte Freileitungsseile

La présente Partie 1 contient les prescriptions pour les conducteurs gainés avec ou sans étanchéité longitudinale intégrée et/ou un conducteur écran semi-conducteur pour des applications dans les lignes aériennes avec une tension assignée U supérieure à 1kV en courant alternatif et de dépassant pas 36 kV en courant alternatif.

Conducteurs gainés pour lignes aériennes et accessoires associés pour des tensions assignées supérieures à 1 kV c.a. et ne dépassant pas 36 kV c.a. - Partie 1: Conducteurs gainés

Dieser Teil 1 enthält Bestimmungen für kunststoffumhüllte Freileitungsseile mit und ohne integrierter Längswasserdichtheit und/oder halbleitender innerer Leitschicht zur Verwendung in Freileitungsanlagen mit einer Nennspannung U von mehr als 1 kV Wechselspannung und nicht mehr als 36 kV Wechselspannung.

Oplaščeni vodniki za nadzemne vode in ustrezni pribor za naznačene izmenične napetosti nad 1 kV, ki ne presegajo 36 kV - 1. del: Oplaščeni vodniki

General Information

• Status: Withdrawn
• Publication Date: 23-Nov-2006
• Withdrawal Date: 30-Jun-2009
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: CLC/TC 20 - Electric cables
• Parallel Committee: IEC/TC 20 - IEC_TC_20
• Current Stage: 9960 - Withdrawal effective - Withdrawal
• Start Date: 26-Oct-2023
• Completion Date: 26-Oct-2023
• Ref Project: SIST EN 50397-1:2007 - Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV a.c. and not exceeding 36 kV a.c. -- Part 1: Covered conductors

Relations

• Replaced By: EN 50397-1:2020 - Covered conductors for overhead lines and the related accessories for rated voltages above 1 kV AC and not exceeding 36 kV AC - Part 1: Covered conductors
• Effective Date: 24-Nov-2020

Standards Content (Sample)

SLOVENSKI SIST EN 50397-1:2007

STANDARD
februar 2007
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Covered conductors for overhead lines and the related accessories for rated
voltages above 1 kV a.c. and not exceeding 36 kV a.c. - Part 1: Covered conductors
ICS 5HIHUHQþQDãWHYLOND
29.060.20; 29.240.20
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EUROPEAN STANDARD
EN 50397-1
NORME EUROPÉENNE
November 2006
EUROPÄISCHE NORM
ICS 29.240.20
English version
Covered conductors for overhead lines
and the related accessories for rated voltages
above 1 kV a.c. and not exceeding 36 kV a.c.
Part 1: Covered conductors
Conducteurs gainés pour lignes aériennes Kunststoffumhüllte Leiter und zugehörige
et accessoires associés pour des tensions Armaturen für Freileitungen mit
assignées supérieures à 1 kV c.a. Nennspannungen über 1 kV und
et ne dépassant pas 36 kV c.a. nicht mehr als 36 kV Wechselspannung
Partie 1: Conducteurs gainés Teil 1: Kunststoffumhüllte Freileitungsseile

This European Standard was approved by CENELEC on 2006-07-01. CENELEC members are bound to comply
with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard
the status of a national standard without any alteration.

Up-to-date lists and bibliographical references concerning such national standards may be obtained on
application to the Central Secretariat or to any CENELEC member.

This European Standard exists in three official versions (English, French, German). A version in any other
language made by translation under the responsibility of a CENELEC member into its own language and notified
to the Central Secretariat has the same status as the official versions.

CENELEC members are the national electrotechnical committees of Austria, Belgium, Cyprus, the Czech
Republic, Denmark, Estonia, Finland, France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia,
Lithuania, Luxembourg, Malta, the Netherlands, Norway, Poland, Portugal, Romania, Slovakia, Slovenia, Spain,
Sweden, Switzerland and the United Kingdom.

CENELEC
European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung

Central Secretariat: rue de Stassart 35, B - 1050 Brussels

© 2006 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50397-1:2006 E
Foreword
This European Standard was prepared by TF “Covered Overhead Line Conductors (COHL)” of the
Technical Committee CENELEC TC 20, Electric cables.

The text of the draft was submitted to the formal vote and was approved by CENELEC as EN 50397-1 on
2006-07-01.
The following dates were fixed:

- latest date by which the EN has to be implemented
at national level by publication of an identical
national standard or by endorsement (dop) 2007-07-01

- latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2009-07-01

This European Standard consists of two parts:

– Part 1 "Covered conductors"; and
– Part 2 "Accessories for covered conductors: Tests and acceptance criteria".

This standard covers the construction, performance and test requirements for covered conductors for
overhead lines having a nominal voltage U above 1 kV a.c. up to and including 36 kV a.c., and for the
related accessories.
__________
– 3 – EN 50397-1:2006
Contents
Introduction.4
1 Scope .5
2 Normative references .5
3 Definitions .5
4 Covered conductors.6
4.1 Code designation .6
4.2 Construction requirements.6
4.2.1 Conductor .6
4.2.2 Filling.7
4.2.3 Covering .7
5 Marking .9
5.1 Indication of origin .9
5.2 Continuity of marks .9
5.3 Other markings.9
5.4 Durability .9
5.5 Legibility .9
6 Tests.9
Annex A (normative) Special conductors .12
Annex B (normative) Measurement of the leakage current.13
Annex C (normative) Tracking resistance.15
Annex D (normative) Slippage test .21

Introduction
Covered conductors consist of a conductor surrounded by a covering made of insulating material as
protection against accidental contacts with other covered conductors and with grounded parts such as
tree branches, etc. In comparison with insulated conductors, this covering has reduced properties, but is
able to withstand the phase-to-earth voltage temporarily.
Since covered conductors are unscreened, they are not touch-proof, i.e. they must be treated as bare
conductors with respect to electric shock.
This standard does not cover aspects related to the installation of overhead lines such as determination
of clearances, spans, sags, etc.

– 5 – EN 50397-1:2006
1 Scope
This Part 1 contains the requirements for covered conductors with or without integrated longitudinal
watertightness and/or semi-conductive conductor screen for applications in overhead lines with rated
voltages U above 1 kV a.c. and not exceeding 36 kV a.c.
2 Normative references
The following referenced documents are indispensable for the application 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.
EN 50182 Conductors for overhead lines – Round wire concentric lay stranded conductors
EN 50356 Method for spark testing of cables
EN 60811 series Insulating and sheathing materials of electric and optical fibre cables – Common
test methods (IEC 60811 series)
EN 61284 Overhead lines – Requirements and tests for fittings (IEC 61284)
HD 380 Test methods for evaluating resistance to tracking and erosion of electrical
insulating materials used under severe ambient conditions (IEC 60587)
HD 605 Electric cables – Additional test methods
3 Definitions
For the purpose of this European Standard, the following definitions apply.
3.1 Definitions relating to tests
3.1.1
type tests (symbol T)
tests required to be made before supplying a type of product covered by this European Standard on a
general commercial basis in order to demonstrate satisfactory performance characteristics to meet the
intended application. These tests are of such nature that, after they have been made, they need not be
repeated unless changes are made in the material, design or manufacturing process which might change
the performance characteristics
3.1.2
sample tests (symbol S)
tests made on samples of completed product or components taken from the completed product adequate
to verify that the finished product meets the design specifications
3.1.3
routine tests (symbol R)
tests made on all production lengths to demonstrate their integrity
3.2
rated voltage
the reference voltage for which the conductor is designed and which serves to define the electrical tests.
The rated voltage is expressed by the value U, expressed in kilovolts, where U is the r.m.s. value
between any two-phase conductors

4 Covered conductors
4.1 Code designation
Covered conductors shall be designated as follows:
Type code CC;
Covering material S (for semi-conductive conductor screen, if any),
X (for cross-linked polyethylene),
T (for thermoplastic polyethylene);
Conductor material and cross-section according to EN 50182;
Conductor design W (for watertight),
K (for compacted);
Rated voltage U in kV …kV.
EXAMPLE OF DESIGNATION
“CCX 66-AL3 WK 20kV” is a XLPE-covered conductor with a rated voltage of 20 kV, longitudinal
watertight compacted conductor of aluminium alloy AL3 and a nominal conductor cross-section of
66 mm².
4.2 Construction requirements
4.2.1 Conductor
Number of conductors: 1
Conductor material: aluminium alloy or steel reinforced aluminium
Nom. cross-section: 35 mm² to 240 mm² (aluminium alloy), 50 mm² to 150 mm²
(total cross-section for steel reinforced aluminium)
Conductor design: the conductors may be compacted or non-compacted.
Information on bare conductors in frequent use may be found in the national lists, contained in Annex F of
EN 50182. However, for the purpose of this European Standard, conductors may be selected from any
national table. Conductors deviating in design from the standard values have to be given by the
manufacturer, but fulfilling all requirements given in EN 50182.
Non-compacted conductors shall comply with EN 50182 (with the exception of the filling, if any).
For compacted conductors, based on conductors according to EN 50182, the following paragraph
applies: The outer diameter of the compacted conductor shall be 95 % (± 1 % for 7- and 19-wire
constructions, ± 1,5 % for 37-wire constructions) of the diameter given in EN 50182. The rated tensile
strength (RTS) shall be at least 95 % of the value given in EN 50182. The d.c. resistance shall not exceed
the value given in EN 50182 by more than 5 %.
Special conductors may also be used (see Annex A).

– 7 – EN 50397-1:2006
4.2.2 Filling
The stranded conductor may be longitudinally watertight by means of adequate measures as e.g. filling
with an adequate mass. The filling mass or other materials for obtaining the longitudinal watertightness,
shall be compatible with the conductor material and the material of the covering (see Table 2).
4.2.3 Covering
The covering shall consist of a cross-linked polyethylene compound, which shall comply with the
requirements according to Table 1, column 3 or of a thermoplastic polyethylene compound, complying
with the requirements according Table 1, column 4.
It shall be possible to remove the covering without damage to the conductor.
Table 1 – Properties of the covering materials
1 2 3 4
Unit
Compound designation X T
Basic material XLPE PE
a
Maximum operating temperature of the conductor °C 90 70
Mechanical properties
before ageing on sample (EN 60811-1-1, Subclause 9.1)
minimum tensile strength MPa 12,5 12,5
minimum elongation at break % 200 300
after ageing on sample (EN 60811-1-2, Subclause 8.1,
ageing method a))
temperature °C 135 110
duration h 168 336
minimum tensile strength MPa - 12,5
maximum variation T1/T0 % ± 25 -
minimum elongation at break % - 300
maximum variation T1/T0 % ± 25 -
b
after ageing on complete product sample
(EN 60811-1-2, Subclause 8.1.4)
temperature °C 100 ± 2 100 ± 2
duration h 168 168
minimum tensile strength MPa - 12,5
maximum variation T2/T0 % ± 25 -
minimum elongation at break % - 300
maximum variation T2/T0 % ± 25 -

Table 1 – Properties of the covering materials (continued)
1 2 3 4
Unit
Physical and chemical properties
hot set test (EN 60811-2-1, Clause 9)
temperature °C 200 -
duration min 15 -
mechanical stress MPa 0,2 -
maximum elongation under load % 175 -
maximum residual elongation % 15 -
pressure test at high temperature (EN 60811-3-1,
Subclause 8.1)
temperature °C - 80
duration h - 4
coefficient k - - 0,8
maximum depth of indentation % - 50
water absorption (EN 60811-1-3, Subclause 9.2)

temperature °C 85 85
duration h 336 336
maximum variation of mass mg/cm² 1 1
shrinkage test (EN 60811-1-3, Clause 10)
distance L between marks mm 200 200
duration h 1 1
temperature °C 130 ± 3 100 ± 3
maximum shrinkage % 4 4
Shore D hardness (HD 605, Subclause 2.2.1)
minimum hardness ShD - 55
a
Maximum operating temperature of the conductor is limited to 80 °C due to mechanical reasons.
b
For use together with watertight conductors only. Adequate measures e.g. neutral capping to prevent leakage of filling
material shall be taken.
An UV-protection shall be provided. If carbon black is used, the content of carbon black shall be
(2,5 ± 0,5) %.
The nominal thickness of the covering shall be calculated according to the following formula:
S = 0,11 U
where
S is the nominal thickness of the covering in mm
...