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SIST EN 50483-4:2009
01-julij-2009
Zahteve za preskušanje pribora za nizkonapetostne izolirane nadzemne kable - 4.
del: Spojke
Test requirements for low voltage aerial bundled cable accessories -- Part 4: Connectors
Prüfanforderungen für Bauteile für isolierte Niederspannungsfreileitungen – Teil 4:
Verbinder
Prescriptions relatives aux essais des accessoires pour réseaux aériens basse tension
torsadés -- Partie 4: Connecteurs
Ta slovenski standard je istoveten z: EN 50483-4:2009
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
SIST EN 50483-4:2009 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
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SIST EN 50483-4:2009
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SIST EN 50483-4:2009
EUROPEAN STANDARD
EN 50483-4
NORME EUROPÉENNE
January 2009
EUROPÄISCHE NORM
ICS 29.240.20
English version
Test requirements for low voltage aerial bundled cable accessories -
Part 4: Connectors
Prescriptions relatives aux essais Prüfanforderungen für Bauteile für
des accessoires pour réseaux aériens isolierte Niederspannungsfreileitungen -
basse tension torsadés - Teil 4: Verbinder
Partie 4: Connecteurs
This European Standard was approved by CENELEC on 2008-12-01. 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, Bulgaria, 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: avenue Marnix 17, B - 1000 Brussels
© 2009 CENELEC - All rights of exploitation in any form and by any means reserved worldwide for CENELEC members.
Ref. No. EN 50483-4:2009 E
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SIST EN 50483-4:2009
EN 50483-4:2009 – 2 –
Foreword
This European Standard was prepared by a sub-group of WG 11 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 50483-4 on 2008-12-01.
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) 2009-12-01
– latest date by which the national standards conflicting
with the EN have to be withdrawn (dow) 2011-12-01
This is Part 4 of CENELEC standard EN 50483 “Test requirements for low voltage aerial
bundled cable accessories”, which has six parts:
– Part 1: Generalities;
– Part 2: Tension and suspension clamps for self supporting system;
– Part 3: Tension and suspension clamps for neutral messenger system;
– Part 4: Connectors;
– Part 5: Electrical ageing test;
– Part 6: Environmental testing.
__________
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Contents
1 Scope . 4
2 Normative re f e r enc es . 4
3 Terms and definitions . 4
4 Symbols . 6
5 Characteristics . 6
6 Marking . 6
7 General test conditions . 7
7.1 Generalities . 7
7.2 Preconditioning of ABC . 7
8 Type tests . 8
8.1 IPC tests . 8
8.2 Pre-insulated through connectors (sleeve) . 25
8.3 Pre-insulated terminals (lugs) . 37
Annex A (informative) Temporary connectors – Temperature rise and overload test . 43
Bibliography . 47
Figures
Figure 1 – Test arrangement . 10
Figure 2 – Typical impact test arrangement . 14
Figure 3 – Illustrative arrangement for dielectrical test in water . 16
Figure 4 – Arrangement for dielectrical test in metallic balls . 17
Figure 5 – Typical arrangement for dielectrical test with metallic gauze . 18
Figure 6 – Test arrangement for the water tightness test . 20
Figure 7 – Orientation of the samples for the climatic ageing test . 24
Figure 8 – Illustrative installation of the mechanical test . 26
Figure 9 – Illustrative set up for dielectrical voltage test . 28
Figure 10 – Climatic ageing test arrangement . 31
Figure 11 – Illustrative set up of the testing assembly . 33
Figure 12 – Diagram of thermal cycles and mechanical stresses applied on phase
conductor. 34
Figure 13 – Diagram of thermal cycles and mechanical loads on neutral conductor . 36
Figure 14 – Illustrative installation of the mechanical test . 38
Figure 15 – Illustrative figure of immersed lug . 39
Figure 16 – Illustrative arrangement of immersion test in sodium hydroxide solution . 42
Figure A.1 – Example of a pin connection . 44
Figure A.2 – Test loop . 45
Tables
Table 1 – Initial loads required for marking . 26
Table 2 – Test loads. 26
Table 3 – Applied tensile load . 36
Table 4 – Tensile loads . 38
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SIST EN 50483-4:2009
EN 50483-4:2009 – 4 –
1 Scope
EN 50483 series applies to overhead line fittings for tensioning, supporting and connecting
aerial bundled cables (ABC) of rated voltage U /U (U ): 0,6/1 (1,2) kV.
0 m
This Part 4 applies to connectors used for the electrical connection of ABC.
The connectors are designed to be installed on ABC defined in HD 626.
Tests described in this document are type tests.
NOTE This European Standard does not invalidate existing approvals of products achieved on the basis of
national standards and specifications and/or the demonstration of satisfactory service performance. However,
products approved according to such national standards or specifications cannot directly claim approval to this
European Standard. It may be possible, subject to agreement between supplier and purchaser, and/or the relevant
conformity assessment body, to demonstrate that conformity to the earlier standard can be used to claim conformity
to this standard, provided an assessment is made of any additional type testing that may need to be carried out.
Any such additional testing that is part of a sequence of testing cannot be done separately.
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 50182:2001, Conductors for overhead lines – Round wire concentric lay stranded conductors
EN 50483 series, Test requirements for low voltage aerial bundled cable accessories
EN 60529:1991, Degrees of protection provided by enclosures (IP Code) (IEC 60529:1989)
HD 626, Overhead distribution cables of rated voltage U /U(U ): 0,6/1 (1,2) kV
o m
IEC 60050-461, International Electrotechnical Vocabulary (IEV) – Part 461: Electric cables
3 Terms and definitions
For the purposes of this document, the terms and definitions given in IEC 60050-461 and the
following apply.
3.1
aerial bundled cable (ABC)
aerial cable consisting of a group of insulated conductors which are twisted together including,
or not, a non insulated conductor
[IEV 461-08-02, modified]
NOTE The terms bundled conductors, bundled cables, bundled cores, conductor bundles and bundle could be
used as equivalent to the term aerial bundled cable (ABC).
3.2
aerial-insulated-cable
insulated cable designed to be suspended overhead and outdoors
[IEV 461-08-01]
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3.3
branch connector
metallic device for connecting a branch conductor to a main conductor at an intermediate point
on the latter
[IEV 461-17-05]
3.4
branch conductor
conductor connected to the main conductor by a connector
3.5
conductor insulation
insulation applied on a conductor
[IEV 461-02-02, modified]
3.6
conductor (of a cable)
part of a cable which has the specific function of carrying current
[IEV 461-01-01]
3.7
connector
metallic device to connect cable conductors together
[IEV 461-17-03]
3.8
core
assembly comprising conductor and its own insulation
[IEV 461-04-04, modified]
3.9
insulation (of a cable)
insulating materials incorporated in a cable with the specific function of withstanding voltage
[IEV 461-02-01]
3.10
insulation piercing connector (IPC)
connector in which electrical contact with the conductor is made by metallic protrusions which
pierce the insulation of the ABC core
[IEV 461-11-08, modified]
3.11
messenger
wire or rope, the primary function of which is to support the cable in aerial installations, which
may be separate from or integral with the cable it supports
[IEV 461-08-03]
3.12
minimum breaking load (MBL)
minimum breaking load of the conductor given by HD 626 or the cable manufacturer if not
defined in the standard or minimum breaking load of the clamp given by the clamp
manufacturer
3.13
neutral messenger system
aerial insulated system where only the neutral messenger supports the ABC
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EN 50483-4:2009 – 6 –
3.14
pre-insulated (terminal) lug
insulated metallic device for connecting an insulated cable conductor to other electrical
equipment
3.15
pre-insulated through connector (sleeve)
insulated metallic device for connecting two consecutive lengths of insulated conductors
3.16
rated tensile strength (RTS)
estimate of the conductor breaking load calculated using the specified tensile properties of the
component wires
[EN 50182:2001, 3.7]
3.17
reusable connector
connector for connecting ABC to stripped cable or bare conductor where only the branch
connection can be reused
3.18
self supporting system
aerial insulated system where all the cores of the ABC contribute to its support
3.19
sheath
uniform and continuous tubular covering of metallic or non metallic material, generally extruded
[IEV 461-05-03]
3.20
shear head
head of a bolt, or a device fitted over the head of a bolt or a nut, which is designed to break at
a specified torque
3.21
type test
test required to be made before supplying a type of material covered by this standard on a
general commercial basis, in order to demonstrate satisfactory performance characteristics to
meet the intended application
NOTE These tests are of such a nature that, after they have been made, they need not be repeated unless
changes are made to the accessory materials, design or type of manufacturing process which might change the
performance characteristics.
4 Symbols
ρ resistivity (Ω.m)
5 Characteristics
These connectors shall connect cables designed to HD 626 and withstand the following type
tests.
6 Marking
See Clause 6 of EN 50483-1.
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7 General test conditions
See Clause 9 of EN 50483-1.
7.1 Generalities
Minimum and maximum cross-sections of the conductors used for the tests shall be the
minimum and maximum cross-sections for which the connector is designed.
All conductors used in these tests shall be pre-conditioned in accordance with 7.2.
When tensile test loads are applied to conductors the rate of increase shall be in accordance
with EN 50483-1, 9.1.4.
A torque meter shall be used for all tightening operations and it shall have a resolution and
accuracy in accordance with EN 50483-1, 9.1.8.
All tests shall be carried out at ambient temperature unless otherwise stated in this standard.
The frequency of a.c. tests shall be in accordance with EN 50483-1, 9.1.1.
The relative humidity shall be in accordance with EN 50483-1, 9.1.9 unless otherwise altered
by this standard.
If a cable breaks beyond any part of a connector, the test result shall be declared void without
discrediting the connector. Tests can be repeated using a new connector and a new cable.
7.2 Preconditioning of ABC
New cores or cables shall be used.
Cores shall be pre-conditioned according to of EN 50483-1, 9.1 in order to ensure the
dimensional stabilisation of the insulating sheath.
The extremities of the service cables shall be installed into the connector in accordance with
the instructions given by the connector manufacturer.
For the voltage and water tightness tests in 8.1.3, if the connector is tested in horizontal
position, the cores shall first be bent and held in a rigid position using an appropriate device in
order to prevent damage to the connections during handling, as required in the specific test.
For the climatic ageing test in 8.1.5.2, the cores shall be bent as for the dielectrical voltage and
water tightness tests and their ends shall be tightly capped to prevent moisture from
penetrating the conductors, as required in the specific test.
When there is a requirement to bend the cables, the bending radius shall be at least 15 times
the outer diameter of the core.
NOTE 1 It is recommended that the cores should be shaped before installing the connectors.
NOTE 2 Cores used should comply with the piercing test of the insulating sheath defined in HD 626 where the
customer requires this and it is applicable to the type of cable being tested.
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SIST EN 50483-4:2009
EN 50483-4:2009 – 8 –
8 Type tests
8.1 IPC tests
8.1.1 Installation of IPCs
Connectors shall be installed in accordance with the manufacturer’s instructions. A torque
meter, in accordance with EN 50483-1, 9.1.8, shall be used for all tightening and untightening
operations.
Tightening shall be at the rate specified in EN 50483-1, 9.1.10.
The same core (e.g. Phase 1) of a cable with the same cross-section shall be used for each
test.
Connectors, used on cores with a cross-section lower than, or equal to, 35 mm², can be held in
position during tightening if necessary.
8.1.2 Mechanical testing
The following tests are designed to ensure that the IPC is both mechanically sound and does
not damage the conductors it connects:
Test Subclause
Test for mechanical damage to the main conductor 8.1.2.1
Branch cable pull-out test 8.1.2.2
Connector bolt tightening test 8.1.2.3
Shear head function test 8.1.2.4
Low temperature impact test 8.1.2.5
8.1.2.1 Test for mechanical damage to the main conductor
8.1.2.1.1 Principle
This test ensures that the mechanical performance of the conductor is not impaired as a
consequence of the installation of the IPC.
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8.1.2.1.2 Test arrangement
Two samples shall be tested. Where the IPC is designed to accept more than one size of core,
2 samples shall be tested in each of the following conductor combinations:
Main Branch
max. max.
min. min.
min. max.
NOTE Where max. min. combination is required this may be agreed between the customer and the manufacturer.
The core shall be mounted in a tensile test machine in a suitable manner.
The core, on which the IPCs will be tested, shall be tensioned to between 10 % and 15 % of its
MBL for aluminium conductors (AAC) and between 15 % and 20 % of its MBL for all other
conductors as defined in HD 626 (for example copper and AAAC).
The core length shall be between 0,5 m and 1,5 m.
When using bare main conductors according to EN 50182 not included in HD 626, RTS shall
be used.
8.1.2.1.3 Procedure
Connectors shall be installed in accordance with the manufacturer’s instructions.
When the connector is designed with a shear-head, it shall be tightened to the manufacturer’s
specified maximum torque.
When the connector is designed without a shear-head, it shall be tightened to 1,1 times the
manufacturer’s specified nominal torque.
The connectors shall not be removed from the core before the mechanical tensile test.
A tensile test load shall be applied to the main conductor until it reaches the following values:
System type Conductor Tensile test load
Copper (4 mm² to 16 mm²) 20 % MBL of the cable
Copper (> 16 mm²) 80 % MBL of the cable
Self supporting
Aluminium (16 mm² to 25 mm²) 1 200 N or 40 % MBL of the cable,
whichever is the greater
Aluminium (> 25 mm²) 80 % MBL of the cable
Phase 60 % MBL of the cable
Neutral messenger
Neutral 90 % MBL of the cable
NOTE Loads for other designs of ABC shall be agreed between the customer and the manufacturer.
The load shall be maintained for 60 s.
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EN 50483-4:2009 – 10 –
8.1.2.1.4 Requirements
The conductor shall maintain the test load for 60 s without breaking or any damage that would
prevent the correct function of the cable.
8.1.2.2 Branch cable pull-out test
8.1.2.2.1 Principle
To ensure that the IPC provides mechanical security of the branch cable.
8.1.2.2.2 Test arrangement
Two samples shall be tested. Where the IPC is designed to accept more than one size of
conductor, two samples shall be tested in each of the following conductor combinations:
Main Branch
min. min.
max. min.
NOTE Where other combinations are required these may be agreed between the customer and the manufacturer.
The branch connector shall be positioned and then installed in accordance with the
manufacturer’s instructions.
The core lengths shall be between 0,2 m and 0,5 m.
The general arrangement is shown in Figure 1. The IPC shall be installed in accordance with
manufacturer’s instructions.
Key
1 branch
2 main secured in mechanical device
Figure 1 – Test arrangement
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8.1.2.2.3 Procedure
When the connector is designed with a shear-head, it shall be tightened to the manufacturer’s
specified maximum torque.
When the connector is designed without a shear-head, it shall be tightened to 1,1 times the
manufacturer’s specified nominal torque.
The core, or in the case of a bare conductor, the conductor, shall be marked at the IPC so that
any slippage during the test can be measured.
A tensile load (F) shall be applied approximately axially, between the branch conductor and the
opposing main conductor which shall be secured in a mechanical device, at a rate between
100 N/min and 500 N/min. This load shall be 1 kN or 10 % of the MBL of the branch conductor
whichever is less.
The load shall be maintained for 60 s.
8.1.2.2.4 Requirements
Core slippage shall not exceed 3 mm.
The cores shall maintain the test load for 60 s without breaking or any damage that would
prevent the correct function of the cable.
8.1.2.3 Connector bolt tightening test
8.1.2.3.1 Principle
To ensure that when tightened, the bolts used to make the electrical connection and provide
mechanical security, do not cause the IPC to fail mechanically during installation.
8.1.2.3.2 Test arrangement
Two connectors shall be tested.
The core on to which the IPC is to be installed shall be tensioned to 20 % of its MBL.
The IPCs shall be installed on to cores for which it is designed. Where the IPC is designed to
accept more than one size of conductor, two samples shall be tested in each of the following
conductor combinations:
Main Branch
max. max.
min. min.
min. max.
NOTE Where max. min. combination is required this may be agreed between the customer and the manufacturer.
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EN 50483-4:2009 – 12 –
8.1.2.3.3 Procedure
The connectors shall be tightened, in accordance with EN 50483-1, 9.1.10, to the maximum
torque specified by the manufacturer, plus 20 %.
NOTE A higher value of torque may be used when this is agreed between customer and supplier.
8.1.2.3.4 Requirements
The connector shall be undamaged.
8.1.2.4 Shear head function test
8.1.2.4.1 Principle
To ensure that the shear head mechanism functions correctly within the specified torque range.
8.1.2.4.2 Test arrangement
Six samples shall be tested at each of the following temperatures:
• the minimum temperature shall be (-10 ± 3) °C;
• the maximum temperature shall be (50 ± 3) °C.
NOTE See EN 50483-1, 9.1, for information on the use of a lower temperature.
The samples shall be tested in either of the following cross-section combinations:
Main Branch
min. min.
max. max.
8.1.2.4.3 Procedure
The connector assemblies shall be placed in a temperature controlled environment until they
reach the test temperature. The temperature shall be maintained for a minimum of 15 min.
The assembly can be removed from the chamber and the torque applied outside. In this case
the temperature of the connector shall be monitored and the torque applied within the
temperature limits defined above.
The shear head shall then be tightened, in accordance with the manufacturer’s installation
instructions, until the head shears. This torque shall be recorded.
The test shall be repeated for the six samples at each of the specified temperatures and
cross-section combination.
8.1.2.4.4 Requirements
For each of the test temperatures and cross-section combination, the torque at which the shear
head shears, shall be within the tolerances of the manufacturer’s specified torque range.
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8.1.2.5 Low temperature impact test
8.1.2.5.1 Principle
To ensure that the connector can withstand an impact when it is cold.
8.1.2.5.2 Test arrangement
Two connectors shall be installed in the manner for which they are designed.
The samples shall be tested in the following cross-section combinations:
Main Branch
max. min.
max. max.
Figure 2 shows a typical test arrangement.
The connectors and the cores shall be placed in a temperature controlled environment at
(-10 ± 3) °C until they reach the test temperature.
NOTE See EN 50483-1, 9.1, for information on the use of a lower temperature.
The assembly can be removed from the cold chamber in order to make the test. To ensure that
the test is carried out at the specified temperature the impact test shall be made immediately.
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EN 50483-4:2009 – 14 –
Dimensions in millimetres
Key
1 hammer 900 g 4 steel 10 kg
2 steel intermediate piece 100 g 5 slightly round edges
3 test piece
Figure 2 – Typical impact test arrangement
8.1.2.5.3 Procedure
The separate samples shall be placed in the impact test device and impacted with a cylindrical
anvil approximately 50 mm in diameter with a spherical contact radius of approximately
300 mm. The anvil shall have a mass of approximately 100 g and shall transfer to the test
sample the impact energy of a weight of 900 g falling freely through 200 mm.
Two impacts shall be made on each sample, one acting from the top and one acting on the
side.
NOTE 1 The position of impact should be agreed between the manufacturer and the customer as being the most
vulnerable points.
NOTE 2 The value of weight and distance of fall may be varied as long as the impact energy remains the same.
8.1.2.5.4 Requirements
No damage shall occur which would affect the correct function of the connector.
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8.1.3 Dielectrical voltage tests and water tightness test
8.1.3.1 Dielectrical voltage test
This test is not applicable to IPC which connects a bare conductor to an insulated conductor.
In order to meet the requirements of the type tests at least one of the two dielectrical tests shall
be carried out.
Connector classes:
Class 1: connector subjected to dielectric test in water;
Class 2: connector subjected to dielectric test in air.
NOTE The choice of the class should be agreed between the manufacturer and the customer.
8.1.3.1.1 Principle
To ensure that the connector can withstand a dielectrical voltage.
8.1.3.1.2 Test arrangement
Two samples shall be tested. Where the IPC is designed to accept more than one size of
conductor, two samples shall be tested in each of the following conductor combinations:
Main Branch
min. min.
max. min.
8.1.3.1.3 Procedure
The connector shall be tightened to the minimum torque indicated by the manufacturer.
Initially, for reusable connectors, the tap core shall be successively, mounted four times and
removed three times.
Should the shear head break whilst mounting the connector then the torque shall be raised to
the minimum value according to the method defined in 8.1.1.
The mounting and removal shall entail taking the conductor out of the connector, but there
shall be no change in orientation, or modification of the stripped end of the conductor.
While mounting and removing the conductor, the bolts shall be tightened to the minimum
torque and then un-tightened.
8.1.3.1.3.1 Test in water (For Class 1 connectors only)
The assembly, of connector and cores, shall be placed at the bottom of a water tank. During
the movement of the assembly it may be supported to ensure no bending of the core or
unnecessary movement of the component parts.
The connector may be placed either vertically or horizontally.
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EN 50483-4:2009 – 16 –
The depth of water shall be measured from the upper part of the connector. The cores shall be
of such length to ensure that they are sufficiently above the water level to prevent flashover
(see Figure 3).
The maximum leakage current shall be in accordance with EN 50483-1, 9.1.5.
The resistivity ρ of the water used in this test shall be in accordance with EN 50483-1, 9.1.6.
The voltage shall be applied at a speed specified in EN 50483-1, 9.1.7.
After 30 min under water, the voltage test shall be applied to the sample with a 4 kV a.c. for
60 s according to Figure 3.
NOTE A voltage of 6 kV may be used when agreed between customer and manufactur
...