SIST HD 626 S1:1998/A2:2002

Overhead distribution cables of rated voltage Uo/U(Um): 0,6/1 (1,2) kV

Isolierte Freileitungsseile für oberirdische Verteilungsnetze mit Nennspannungen Uo/U(Um): 0,6/1 (1,2) kV

Câbles de distribution aérienne de tension assignée Uo/U(Um): 0,6/1 (1,2) kV

Nadzemni razvodni kabli za naznačeno napetost Uo/U(Um): 0,6/1 (1,2) kV

General Information

• Status: Published
• Publication Date: 31-Aug-2002
• ICS: 29.060.20 - Cables
• ICS: 29.240.20 - Power transmission and distribution lines
• Technical Committee: IEKA - Electric cables
• Current Stage: 6060 - National Implementation/Publication (Adopted Project)
• Start Date: 01-Sep-2002
• Due Date: 01-Sep-2002
• Completion Date: 01-Sep-2002
• Directive: 2006/95/EC - Directive 2006/95/EC of the European Parliament and of the Council of 12 December 2006 on the harmonisation of the laws of Member States relating to electrical equipment designed for use within certain voltage limits (codified version)
• Directive: 2014/35/EU - Directive 2014/35/EU of the European Parliament and of the Council of 26 February 2014 on the harmonisation of the laws of the Member States relating to the making available on the market of electrical equipment designed for use within certain voltage limits
• Directive: 73/23/EEC - Electrical equipment designed for use within certain voltage limits
• Ref Project: HD 626 S1:1996/A2:2002 - Overhead distribution cables of rated voltage Uo/U(Um): 0,6/1 (1,2) kV

Relations

• Amends: SIST HD 626 S1:1998 - Overhead distribution cables of rated voltage Uo/U(Um): 0,6/1 (1,2) kV
• Effective Date: 01-Sep-2002
• Amends: SIST HD 626 S1:1998 - Overhead distribution cables of rated voltage Uo/U(Um): 0,6/1 (1,2) kV
• Effective Date: 28-Jan-2023
• Revised: oSIST prHD 626 S2:2020 - Overhead distribution cables of rated voltage U0/U(Um): 0,6/1 (1,2) kV
• Effective Date: 15-May-2018

Standards Content (Sample)

SLOVENSKI STANDARD
SIST HD 626 S1:1998/A2:2002
01-september-2002
1DG]HPQLUD]YRGQLNDEOL]DQD]QDþHQRQDSHWRVW8R88PN9
Overhead distribution cables of rated voltage Uo/U(Um): 0,6/1 (1,2) kV
Isolierte Freileitungsseile für oberirdische Verteilungsnetze mit Nennspannungen Uo/U
(Um): 0,6/1 (1,2) kV
Câbles de distribution aérienne de tension assignée Uo/U(Um): 0,6/1 (1,2) kV
Ta slovenski standard je istoveten z: HD 626 S1:1996/A2:2002
ICS:
29.060.20 Kabli Cables
29.240.20 Daljnovodi Power transmission and
distribution lines
SIST HD 626 S1:1998/A2:2002 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

---------------------- Page: 1 ----------------------

SIST HD 626 S1:1998/A2:2002

---------------------- Page: 2 ----------------------

SIST HD 626 S1:1998/A2:2002
HARMONIZATION DOCUMENT HD 626 S1/A2
DOCUMENT D'HARMONISATION
HARMONISIERUNGSDOKUMENT January 2002
ICS 29.060.20
English version
Overhead distribution cables of rated voltage Uo/U(Um): 0,6/1 (1,2) kV
Câbles de distribution aérienne Isolierte Freileitungsseile
de tension assignée für oberirdische Verteilungsnetze
Uo/U(Um): 0,6/1 (1,2) kV mit Nennspannungen
Uo/U(Um): 0,6/1 (1,2) kV
This amendment A2 modifies the Harmonization Document HD 626 S1:1996; it was approved by
CENELEC on 2001-06-01. CENELEC members are bound to comply with the CEN/CENELEC Internal
Regulations which stipulate the conditions for implementation of this amendment on a national level.
Up-to-date lists and bibliographical references concerning such national implementation may be obtained
on application to the Central Secretariat or to any CENELEC member.
This amendment exists in two official versions (English, French).
CENELEC members are the national electrotechnical committees of Austria, Belgium, Czech Republic,
Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Malta, Netherlands,
Norway, Portugal, Spain, Sweden, Switzerland and 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
© 2002 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. HD 626 S1:1996/A2:2002 E

---------------------- Page: 3 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 0-2
HD 626 S1:1996/A2:2002
Foreword
This amendment to Harmonization Document HD 626 S1:1996 has been prepared by WG 9 of CENELEC
TC 20 “Electric Cables”.
CENELEC TC 20 confirmed at its Stresa meeting (May 1999) that the amendment should go to the Unique
Acceptance Procedure.
A list of additions and amendments to the particular sections of Parts 2, 4, 5 and 6 is given in this Part 0.
NOTE  During the preparation of this amendment, IEC 502 (4th edition) has been replaced by IEC 60502-1 and -2 and HD 405.1 has been
superseded by EN 50265.
In general, the updating of these references has not been included in this amendment unless a complete section has been introduced or
replaced. Users should refer to these new editions for the most up-to-date information.
The text of the draft was submitted to the Unique Acceptance Procedure and was approved by CENELEC
as amendment A2 to HD 626 S1:1996 on 2001-06-01.
The following dates were fixed:
� latest date by which the existence of the
amendment has to be announced at national level (doa) 2002-02-01

� latest date by which the amendment has to be
implemented at national level by publication of a
harmonized national standard or by endorsement (dop) 2002-08-01

� latest date by which the national standards
conflicting with the amendment have to be withdrawn (dow) 2003-08-01

---------------------- Page: 4 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 0-3
HD 626 S1:1996/A2:2002
CONTENTS OF HD 626, HD 626/A1 AND HD 626/A2
PART 0 CONTENTS OF HD 626, HD 626/A1 AND HD 626/A2 A2 Withdrawn section and
replaced by the new
one
PART 1 GENERAL REQUIREMENTS A1 Withdrawn section and
replaced by the new
one
PART 2 ADDITIONAL TEST METHODS
A2 Amended section
PART 3 PE INSULATED SELF SUPPORTING CABLES
(bundle assembled cores)
3 A Bundle assembled cores for overhead distribution and -
service (Type 3A-1) - (Cables with aluminium conductors)
3 C Bundle assembled cores for overhead distribution and
-
service (Type 3C-1 and 3C-2) - (Cables with aluminium
(Type 3C-1) or with copper (Type 3C-2) phase conductors
and aluminium neutral conductor)
3 I Bundle assembled cores for overhead service (Type 3 I-1)
-
- (Cables with aluminium conductors)
3 L Bundle assembled cores for overhead distribution and
-
service (Type 3L-1) - (Cables with aluminium conductors)
PART 4 XLPE INSULATED SELF SUPPORTING CABLES
(bundle assembled cores)
4 B Bundle assembled cores for overhead service A2 Amended section
(Types 4B-1 and 4B-2) - (Cables with aluminium
conductors (Type 4B-1) or with copper conductors
(Type 4B-2))
4 E Bundle assembled cores for overhead service (Type 4E-1) A2 Amended section
- (Cables with aluminium conductors)
4 F Bundle assembled cores for overhead distribution and A1 Amended section
service (Type 4F-1) - (Cables with aluminium conductors)
4 G Bundle assembled cores for overhead distribution -
(Type 4G-1) - (Cables with aluminium conductors)
4 J Bundle assembled cores for overhead service (Types 4J-1 A2
Withdrawn section and
and 4J-2) - (Cables with aluminium conductors (Type 4J-1)
replaced by the new
or with copper conductors (Type 4J-2))
one

---------------------- Page: 5 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 0-4
HD 626 S1:1996/A2:2002
4 K Bundle assembled cores for overhead service -
(Type 4K-1) - (Cables with aluminium conductors)
4 M Bundle assembled cores for overhead distribution and A2 Amended section
service (Type 4M-1) - (Cables with aluminium conductors)
4 N
Bundle assembled cores for overhead distribution A2 Withdrawn section and
(Type 4N-1) - (Cables with aluminium conductors) replaced by the new
one
PART 5 PE INSULATED CABLES WITH MESSENGER
(bundle assembled cores)
5 D Bundle assembled cores for overhead distribution and A2
Withdrawn section and
service (Type 5D-1) - (Cables with aluminium phase
replaced by the new
conductors and uninsulated aluminium alloy neutral
one
conductor)
5 I Bundle assembled cores for overhead service (Type 5I-1) -
- (Cables with aluminium phase conductors and stranded
steel messenger alloy neutral conductor)
PART 6 XLPE INSULATED CABLES WITH MESSENGER
(bundle assembled cores)
6 B Bundle assembled cores for overhead distribution A2 Amended section
(Type 6B-1) - (Cables with aluminium phase conductors
and aluminium alloy neutral conductor)
6 D Bundle assembled cores for overhead distribution and A2
Withdrawn section and
service (Type 6D-1) - (Cables with aluminium phase
replaced by the new
conductors and aluminium alloy neutral conductor)
one
6 E Bundle assembled cores for overhead distribution A2 Amended section
(Type 6E-1) - (Cables with aluminium phase conductors
and aluminium alloy neutral conductor)
6 J Bundle assembled cores for overhead distribution A2
Withdrawn section and
(Type 6J-1) - (Cables with aluminium phase conductors
replaced by the new
and aluminium alloy neutral conductor)
one
6 K Bundle assembled cores for overhead distribution -
(Type 6K-1) - (Cables with aluminium phase conductors
and aluminium alloy neutral conductor)
6 N Bundle assembled cores for overhead distribution A2
Amended section
(Type 6N-1) - (Cables with aluminium phase conductors
and aluminium alloy neutral conductor)

---------------------- Page: 6 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 0-5
HD 626 S1:1996/A2:2002
PART 7 XLPE INSULATED AND SHEATHED SELF SUPPORTING CABLES
(bundle assembled cores)
7 H Bundle assembled cores for overhead distribution and -
service (type 7H), Self supporting XLPE insulated cables -
(Cables with tinned copper phase conductors and tinned
copper neutral conductor)
PART 8 XLPE INSULATED AND PVC SHEATHED CABLES WITH MESSENGER
(bundle assembled cores)
8 H Bundle assembled cores for overhead distribution and -
service (type 8H), Neutral conductor messenger XLPE
insulated cables - (Cables with aluminium phase
conductors and aluminium alloy neutral conductor)
PART 9 SINGLE CORE CABLES
9 F Single cores for overhead distribution and service A1 New section
(Type 9F-1) - (XLPE insulated core with aluminium
conductors)
9 G Single cores for overhead distribution and service A1 New section
(Type 9G-1) - (XLPE insulated core with aluminium
conductors)
9 I Single cores for overhead distribution and service A1 New section
(Type 9I-1) - (PE insulated core with aluminium
conductors)
9N Single cores for overhead distribution (Type 9N-1 and A1 New section
Type 9N-2) - (EPR insulated and PCP sheath cables with
aluminium conductors Type 9N-1 or with copper
conductors Type 9N-2)
PART 10 SERVICE CABLES WITH CONCENTRIC NEUTRAL CONDUCTOR
10 N Single core and three cores service cables with concentric A1 New section
neutral conductor (Type 10N) -(Cables with tinned copper
phase conductors and tinned copper concentric neutral
conductor)

---------------------- Page: 7 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 0-6
HD 626 S1:1996/A2:2002
CONTENTS OF HD 626/A1
PART 0 (new)
PART 1 GENERAL REQUIREMENTS (complete part with new pages 3, 8, 9, 16, 17)
PART 4 XLPE INSULATED SELF SUPPORTING CABLES
(bundle assembled cores)
4 F Bundle assembled cores for overhead distribution and A1 Amended pages 4
service (Type 4F-1) - (Cables with aluminium conductors). and 5
(amendment to pages 4-F and 5-F)
PART 9 SINGLE CORE CABLES (new)
9 F Single cores for overhead distribution and service A1 New section
(Type 9F-1) - (XLPE insulated core with aluminium
conductors)
9 G Single cores for overhead distribution and service A1 New section
(Type 9G-1) - (XLPE insulated core with aluminium
conductors)
9 I Single cores for overhead distribution and service A1 New section
(Type 9I-1) - (PE insulated core with aluminium
conductors)
9 N Single cores for overhead distribution (Type 9N-1 and A1 New section
Type 9N-2) - (EPR insulated and PCP sheath cables with
aluminium conductors Type 9N-1 or with copper
conductors Type 9N-2)
PART 10 SERVICE CABLES WITH CONCENTRIC NEUTRAL CONDUCTOR (new)
10 N Single core and three cores service cables with concentric A1 New section
neutral conductor (Type 10N-1) - (Cables with tinned
copper phase conductors and tinned copper concentric
neutral conductor)
NOTE  During the preparation of amendment 1 to HD 626, HD 505 (Sections 1.1 to 4.1 inclusive) has been replaced by EN 60811
(Sections 1-1 to 4-1 inclusive).
In general, the updating of these references has not been included in this amendment unless a complete section has been introduced or
replaced but users should refer to EN 60811 for the most up-to-date information. The clause numbers for the test methods in EN 60811 are
identical to those in HD 505.

---------------------- Page: 8 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 0-7
HD 626 S1:1996/A2:2002
CONTENTS OF HD 626/A2
PART 0 CONTENTS OF HD 626 and HD 626/A1 A2 Withdrawn section and
replaced by the new
one
PART 2 ADDITIONAL TEST METHODS A2 Amended section
PART 4 XLPE INSULATED SELF SUPPORTING CABLES
(bundle assembled cores)
4 B Bundle assembled cores for overhead service A2 Amended section
(Types 4B-1 and 4B-2) - (Cables with aluminium
conductors (Type 4B-1) or with copper conductors
(Type 4B-2))
4 E Bundle assembled cores for overhead service (Type 4E-1) A2 Amended section
- (Cables with aluminium conductors)
4 J Bundle assembled cores for overhead service (Types 4J-1 A2
Withdrawn section and
and 4J-2) - (Cables with aluminium conductors (Type 4J-1)
replaced by the new
or with copper conductors (Type 4J-2))
one
4 M Bundle assembled cores for overhead distribution and A2 Amended section
service (Type 4M-1) - (Cables with aluminium conductors)
4 N
Bundle assembled cores for overhead distribution A2 Withdrawn section and
(Type 4N-1) replaced by the new
one
PART 5 PE INSULATED CABLES WITH MESSENGER
(bundle assembled cores)
5 D Bundle assembled cores for overhead distribution and A2
Withdrawn section and
service (Type 5D-1) - (Cables with aluminium phase
replaced by the new
conductors and uninsulated aluminium alloy neutral
one
conductor)
PART 6 XLPE INSULATED CABLES WITH MESSENGER
(bundle assembled cores)
6 B Bundle assembled cores for overhead distribution A2 Amended section
(Type 6B-1) - (Cables with aluminium phase conductors
and aluminium alloy neutral conductor)
6 D Bundle assembled cores for overhead distribution and A2
Withdrawn section and
service (Type 6D-1) - (Cables with aluminium phase
replaced by the new
conductors and aluminium alloy neutral conductor)
one
6 E Bundle assembled cores for overhead distribution A2 Amended section
(Type 6E-1) - (Cables with aluminium phase conductors
and aluminium alloy neutral conductor)

---------------------- Page: 9 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 0-8
HD 626 S1:1996/A2:2002
6 J Bundle assembled cores for overhead distribution A2
Withdrawn section and
(Type 6J-1) - (Cables with aluminium phase conductors
replaced by the new
and aluminium alloy neutral conductor)
one
6 N Bundle assembled cores for overhead distribution A2
Amended section
(Type 6N-1)

---------------------- Page: 10 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 2-0
HD 626 S1:1996/A2:2002
Part 2
HD 626 - BUNDLE ASSEMBLED CORES FOR OVERHEAD DISTRIBUTION AND SERVICE
PART 2 - ADDITIONAL TEST METHODS
Replace the pages:
2-9, 2-13, 2-14, 2-15, 2-16, 2-19, 2-32, 2-34, 2-35 and 2-36
by the following A2 referred pages:
2-9, 2-13, 2-14, 2-15, 2-16, 2-19, 2-32, 2-32-a, 2-32-b, 2-32-c, 2-34, 2-35 and 2-36

---------------------- Page: 11 ----------------------

SIST HD 626 S1:1998/A2:2002

---------------------- Page: 12 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 2-9
HD 626 S1:1996/A2:2002
Part 2
4 Test procedure
1 Adjusting the clamp by a gradual application for about 30 s of the tensile stress F till
680 daN.
2 The tensile stress of 680 daN is maintained during 15 min.
3 Measure the eventual conductor length L, which could appear between the reference mark
and the insulation.
5 Test results
After 15 minutes under load
- if L ≤ 1 mm, the test is considered as satisfactory,
- if L > 1 mm, 2 new tests must be made.
The material is considered as satisfactory if the 2 complementary tests have a value result of
L ≤ 1 mm.
2.2.2 Testing of adherence of insulation on messenger conductor (Method 2)
The test shall be carried out on the messenger after pre-conditioning in air oven at 120°C for 1 hour
according to clause 8 of EN 60811-1-2, followed by a natural cooling of at least 16 h at ambient
temperature. The preconditioning at 120°C is optional but in case of doubt, this preconditioning shall
be performed.
Test procedure
This test shall be carried out according to Figure 2.2.2.1.
The device shall still be capable of rotating, such rotation shall be made easier by a ball-bearing so
as not to impair the slipping-out of the grips according to the lay of pitch.
Six test pieces shall be taken and shall be evenly distributed over a length of at least 10 m.
Both the size and shape of test pieces are defined in Figure 2.2.2.1.
The tensile rate shall be (2 ± 1) cm/min and one shall measure the stress T required initiating the
g
sliding of the conductor in its sheath.
Results to be obtained
For all test-pieces, the minimum value of T shall be greater or equal to 18 daN or to the values
g
given in the particular section.

---------------------- Page: 13 ----------------------

SIST HD 626 S1:1998/A2:2002

---------------------- Page: 14 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 2-13
HD 626 S1:1996/A2:2002
Part 2
2 OFF-M8 Grade bolt
Section XX4
2 OFF-8 ø CLEAR
X
50
11
Threaded insert
See inset
X' 2 OFF-3.2 ø Dowels
50
( to enter screw bush )
2 OFF-8 ø TAP
0.51
Thread core
diameter
1.26 Thread per mm
66
THREAD INSERT DETAILS
Figure 2.2.4.2
2.2.5 Testing of adherence of insulation on messenger conductor (Method 5)
The test shall be carried out on the messenger after pre-conditioning in air oven at 120°C for 1 hour
according to clause 8 of EN 60811-1-2, followed by a natural cooling of at least 16 h at ambient
temperature. The preconditioning at 120°C is optional but in case of doubt this preconditioning shall
be performed.
Test procedure
This test shall be carried out according to the diagram shown in Figure 2.2.5.1.
The reference anchor is given in Figure 2.3.1.2.
6
60
35.35
3.2
28.65

---------------------- Page: 15 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 2-14
HD 626 S1:1996/A2:2002
Part 2
Six test-pieces shall be taken and shall be evenly distributed over a length of at least 6 m.
Both the size and shape of test-pieces are defined in Figure 2.2.5.1.
10 cm
10 cm 25 cm
2 cm 3 cm
AB
C
1 cm
Force
Force
reference anchor
Figure 2.2.5.1 Diagram - Dimensions of test pieces
The insulation is completely cut in A and in B.
The anchor compresses the messenger with a force of
2
- (2000 ± 100) daN (for 54,6 mm messenger),
2
- (2700 ± 100) daN (for 70 mm messenger),
2
- (3200 ± 100) daN (for 95 mm messenger) (provisional value).
A tensile force is applied between the reference clamp and the free end of the messenger firmly
maintained with an appropriate tightening device.
The tensile force is applied at least 10 min after installing the test sample in the clamp.
The force increase rate shall be between 250 daN/min and 500 daN/min and one shall measure the
found during initiating the sliding of the conductor in its sheath until point C.
maximum stress T
F
Results to be obtained
The mean value T of the six pieces shall be greater or equal to
F
2
- 1200 daN (for 54,6 mm messenger) (provisional value),
2
- 1600 daN (for 70 mm messenger) (provisional value),
2
- 2000 daN (for 95 mm messenger) (provisional value).

---------------------- Page: 16 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 2-15
HD 626 S1:1996/A2:2002
Part 2
2.3 THERMOMECHANICAL BEHAVIOUR OF MESSENGER
2.3.1 Thermomechanical behaviour of messenger (Method 1)
2 2 2

, on 70 mm or on 95 mm messenger conductor sample
The test shall be carried out on a 54,6 mm
of 5 m to 10 m long according to the following sketch. An additional sample is also required to
determine the reference value T (see § 3 hereafter).
o
The test shall be carried out on the messenger after pre-conditioning in air oven at 120 °C for 1 hour
according to clause 8 of EN 60811-1-2, followed by a natural cooling of at least 16 h at ambient
temperature. The preconditioning at 120 °C is optional but in case of doubt, this preconditioning shall
be performed.
1 - Test procedure
The type test shall be carried out according to the diagram shown in Figure 2.3.1.1.
Free rotating
of the a
nchoring
Reference
Strain bearing
device
anchoring
Dynamo-
Overload
Load
Anchoring neutral core
metric
device
under test
device
cell
5 to 10 m
Figure 2.3.1.1 - Diagram of installations intended for testing the behaviour of messenger
neutral core under thermal and mechanical stresses
The reference anchor device shown on this graph is a device with compression by spring, the shape
of which is as defined on the drawing given in Figure 2.3.1.2. The casing is in aluminium alloy and
the keys in polyamid 6.
The test shall consist in imposing a mechanical stress on the anchor device and the messenger
neutral core with periodical applications of an mechanical overload.
One shall superimpose on the mechanical stresses a thermal cycle obtained by intermittent currents
flowing through the messenger neutral core; the mechanical overload shall always be applied in cold
period.

---------------------- Page: 17 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 2-16
HD 626 S1:1996/A2:2002
Part 2
Screw M 16 Spring in steel
AGS
(603, 0,+ 60)N/mm
Screw CHC M6 Polyamid 6 AGS Steel
see fig. a
(1)
Figure 2.3.1.2 - Reference anchor device for messenger neutral core
2 mm
5 mm
B
A
Figure a
250 mm
Cross-section Ø A Ø B
2
(mm ) (mm) (mm)
  54,6 13,5 15,5
70 14,1 16,1
95
Under consideration Under consideration

(1)
 It is essential to make all necessary arrangements to avoid a circulating current in the anchor devices.

---------------------- Page: 18 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 2-19
HD 626 S1:1996/A2:2002
Part 2
Sliding test
The sliding of the insulating sheath of the neutral core as against the part ensuring the clamping shall
comply with the following requirements:
after 2 cycles g  ≤ 4 mm;
- sliding g
2 2
after 500 cycles g ≤ 5 mm.
- sliding g
500 500
Depth of indentation measurement
The sheath of the messenger neutral core shall be cut in the areas appearing as the most distorted.
The residual thicknesses e and e of the insulating material shall be measured by means of a
1 2
microscope (Figure 2.3.1.4).
E1
e1
e2
E2
Figure 2.3.1.4 Figure 2.3.1.5
The minimum values obtained e and e are compared to the minimum value of the thickness E and
1 2 1

E measured on the neutral core sheath, on the same line, at a distance of one or several pitches, on
2

the part not subjected to the mechanical constraint (Figure 2.3.1.5).
The depth of indentation, expressed in %, is defined by the formula:
�E �E �� �e �e �
1 2 1 2
F(%)� �100
��E �E
1 2
It shall be less than 25 (provisional value).

---------------------- Page: 19 ----------------------

SIST HD 626 S1:1998/A2:2002

---------------------- Page: 20 ----------------------

SIST HD 626 S1:1998/A2:2002

---------------------- Page: 21 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 2-32
HD 626 S1:1996/A2:2002
Part 2
Table 2.3.5.2 - Data of sizing device for the mechanical test of the messenger
Cross-section
2
of the messenger   (mm )  54,6 80
N° of rod  5  6
Diameter o f rod   (mm)    3,45     3,71
Total length    (mm) 750 900
Minimum protection length (mm) 620 760
Identification of rods blue yellow
Nature of rods Al
Direction of laying "Z"
2.3.6 Behaviour of cable under combined thermal and mechanical stresses
(Method 6 – Self-supporting cables)
This test shall be carried out on a sample of 6 to 11 m long from the complete cable, according to the
diagram given in Figure 2.3.6.1. The sample shall consist of all the assembled cores of the cable.
Anchoring
Cable sample Anchoring
device
(the public device
lighting core, if
any, is not
stressed)
Figure 2.3.6.1 – Diagram of installations intended for testing the behavior of self-supporting
cable under combined thermal and mechanical stresses
The anchoring devices shown in this diagram are not specified, but they shall be provided by the cable
manufacturer. However, the contact length between each core and the clamps of the anchoring device
shall not exceed 120 mm. The anchoring devices shall be mounted on the cable sample according to
the cable manufacturer's directives.
1 - Test procedure
The test shall be carried out at an ambient temperature (not lower than 10 °C).
During the test, the three phase cores and the neutral core of the cable sample are subjected to a
mechanical stress between the two anchoring devices and a mechanical overload is periodically
superimposed on this stress. The public lighting core, if any, is not stressed.

---------------------- Page: 22 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 2-32-a
HD 626 S1:1996/A2:2002
Part 2
In addition to the mechanical stress, a thermal cycle is applied by intermittently supplying a current
through all the stressed conductors of the cable sample. The mechanical overload shall be applied
during the cold period of the thermal cycle.
2
For cables having phase and neutral conductor cross-section equal to 120 mm , the basic cycle lasts
110 min (see note after thermal and mechanical stresses), during which both mechanical and thermal
stresses are applied in the cable sample as follows:
Thermal stress
During the first 45 minutes of the cycle, heating is achieved by supplying a current of a density
2 2
between 3 A/mm and 5 A/mm through each stressed conductor of the cable sample (i.e. the three
phase conductors and the neutral conductor). Current shall not be supplied to any other conductor,
such as the public lighting conductor, if any. The temperature of each heated conductor shall be
sustained at (60 � 3)°C.
After heating, the conductors of the cable sample shall be left to cool down naturally to (25 � 3)°C by
removing the current supply. The temperature of each conductor shall be sustained at this value until
the end of the cycle.
Mechanical stress
During the first 95 minutes of the cycle, the mechanical stress shall be held to 20% of the total
minimum specified breaking load of the four stressed conductors of the cable sample (i.e. 4 times the
minimum specified of the breaking load of the phase or neutral conductor). The minimum specified
breaking load of each conductor is given in the particular section of this HD.
During the last 15 min of the cycle, the mechanical stress shall be increased to 40% of the total
breaking load of the four stressed conductors. This overload shall be applied gradually in a time
interval greater or equal to 5 s.
NOTE After heating - during the thermal stress - the time needed for the cable sample to almost retrieve the ambient temperature
(usually between 20 – 25 �C) depends on the cable’s time constant T (it should be at least 3 times greater than T). The thermal and
2 2
mechanical stress periods of the cycles shown in Figure 2.3.6.2 apply only for the 4 x 120 mm Al + 25 mm Al cable. Thermal and
mechanical stress periods for other cable sizes are under consideration.
The number of cycles is set to 500.
A schematic representation of the cycles is given in Figure 2.3.6.2.

---------------------- Page: 23 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 2-32-b
HD 626 S1:1996/A2:2002
Part 2
temperature mechanical strength
ºC
daN
100
90
40% of the
80
total breaking
load of the
70
four cores
under stress
60
50
40
20% of the
total breaking
30
load of the
four cores
20
under stress
10
0
min
Figure 2.3.6.2 - Graph of thermal cycles imposed on self-supporting cable under mechanical
2
stress for 120 mm phase and neutral conductor cross-section
2 - Results to be obtained
Sliding test
The sliding of the insulating sheath in relation to the part ensuring the clamping shall comply with the
following requirements:
- sliding after 2 cycles g  � 4 mm
2
- sliding after 500 cycles g � 5 mm
500
Voltage test
After the endurance cycles, the cable sample fitted with its anchoring device shall be immersed in
water and each of the four stressed cores shall be subjected to a dielectric strength test (10 kV ac for
30 min).
Crushing test
After removing the anchoring device, the insulating sheath of each core of the cable sample shall be
cut in the areas appearing as the most distorted. The residual thickness e of the insulating sheath
m
shall be measured by means of a microscope.
�
The minimum value e obtained shall be compared to the minimum value of the thickness e of the
m
m
insulating sheath measured on a new core from the complete cable.
45
95
110
155
205
220

---------------------- Page: 24 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 2-32-c
HD 626 S1:1996/A2:2002
Part 2
The crushing, expressed in %, is defined by the formula:
o
e � e
m
m
�100
o
e m

It shall be less than 30.
2.4 BENDING TESTS
2.4.1 Wrapping test (Method 1)
This wire shall be wrapped round a wire of its own diameter to form a close helix of eight turns. Six
turns shall then be unwrapped and again closely rewrapped in the same direction as the first
wrapping.
2.4.2 Bending test at low temperature (Method 2)
Before the test, conductor samples must be maintained 16 hours at (- 40 ± 2)°C temperature. The
sample shall then be bent around a test mandrel turning the sample around the mandrel 180°. The
sample shall then be straightened. This operation shall be repeated once by bending the cable to the
opposite direction.
No cracks visible to the naked eye are allowed and all the conductor wires shall be unbroken.
The diameter of the test mandrel shall be 4 times the diameter of the insulated conductor.
2.4.3 Manoeuvrability test (Method 3)
This test will be conducted on the complete bundle of the following compositions:
- 3 x  25 Al / 54,6 Alm
- 3 x  50 Al / 54,6 Alm
- 3 x  95 Al / 54,6 Alm
- 3 x 150 Al / 80  Alm
Test method
The test is performed as per the schematic diagram and the sample (Figure 2.4.3.1).
The pulling machine will be equipped with a graphic stress recorder.
The tests will be carried out on five samples.

---------------------- Page: 25 ----------------------

SIST HD 626 S1:1998/A2:2002
Page 2-34
HD 626 S1:1996/A2:2002
Part 2
When setting up the samples, special care should be taken in the straightening and tying so that the
bundle is not twisted or unbraided.
The test sample will be set in place at the top of the two pulleys and the third pulley will then be
brought up until it contacts the test specimen and is then kept in this position. The plotting system is
then switched on to record the stress and displacement curve. Displacement of the pulling machine
jaws is then commenced at a rate of (500 ± 5) mm/min, until reaching a displacement of at least 180
mm. The sample will be in the form of a "U".
Results to be obtained
The test is considered satisfactory when the median of the maximum stresses obtained of the five
samples for the different compositions does not exceed that specified in Table 2.4.3.2.
Table 2.4.3.2 - Manoeuvrability Test Data
(1)
Compositions Maximum stress
daN
- 3 x  25 Al / 54,6 Alm 20
- 3 x  50 Al / 54,6 Alm 30
- 3 x
...