kSIST FprEN 50483-5:2025

SLOVENSKI STANDARD
oSIST prEN 50483-5:2024
01-december-2024
Zahteve za preskušanje pribora za nizkonapetostne izolirane nadzemne kable - 5.
del: Preskus električnega staranja
Test requirements for low voltage aerial bundled cable accessories - Part 5: Electrical
ageing test
Prüfanforderungen für Bauteile für isolierte Niederspannungsfreileitungen - Teil 5:
Elektrische Alterungsprüfungen
Prescriptions relatives aux essais des accessoires pour réseaux aériens basse tension
torsadés - Partie 5: Essai de vieillissement électrique
Ta slovenski standard je istoveten z: prEN 50483-5
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
oSIST prEN 50483-5:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.

oSIST prEN 50483-5:2024
oSIST prEN 50483-5:2024
EUROPEAN STANDARD DRAFT
prEN 50483-5
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2024
ICS 29.240.20 Will supersede EN 50483-5:2009
English Version
Test requirements for low voltage aerial bundled cable
accessories - Part 5: Electrical ageing test
Prescriptions relatives aux essais des accessoires pour Prüfanforderungen für Bauteile für isolierte
réseaux aériens basse tension torsadés - Partie 5: Essai de Niederspannungsfreileitungen - Teil 5: Elektrische
vieillissement électrique Alterungsprüfungen
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2025-01-10.

It has been drawn up by CLC/TC 20.

If this draft becomes a European Standard, 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.

This draft European Standard was established by CENELEC 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 CEN-CENELEC Management Centre has the same status as the official versions.

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

Recipients of this draft are invited to submit, with their comments, notification of any relevant patent rights of which they are aware and to
provide supporting documentation.

Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and
shall not be referred to as a European Standard.

European Committee for Electrotechnical Standardization
Comité Européen de Normalisation Electrotechnique
Europäisches Komitee für Elektrotechnische Normung
CEN-CENELEC Management Centre: Rue de la Science 23, B-1040 Brussels
© 2024 CENELEC All rights of exploitation in any form and by any means reserved worldwide for CENELEC Members.
Project: 79847 Ref. No. prEN 50483-5 E

oSIST prEN 50483-5:2024
prEN 50483-5:2024 (E)
Contents Page
1 European foreword . 3
2 Introduction . 4
3 1 Scope . 5
4 2 Normative references . 5
5 3 Terms and definitions . 5
6 4 Symbols . 7
7 5 Type test . 9
8 5.1 Principle . 9
9 5.2 Test arrangement . 9
10 5.3 Test specimen . 11
11 5.4 Measurement . 13
12 5.5 Heat cycle . 15
13 5.6 Requirements . 18
14 Annex A (normative) Equalizers. 27
15 A.1 General . 27
16 A.2 Copper conductors . 27
17 A.3 Stranded aluminium conductors (Figure A.1) . 27
18 A.4 Dimensions. 28
19 Annex B (informative) Recommendations to improve accuracy of measurement . 29
20 B.1 Handling the test loop . 29
21 B.2 Measurements, instruments and readings . 29
22 Bibliography . 30

oSIST prEN 50483-5:2024
prEN 50483-5:2024 (E)
23 European foreword
24 This document [prEN 50483-5:2024] has been prepared by WG 11 of CLC/TC 20 “Electric cables”.
25 This document is currently submitted to the Enquiry.
26 The following dates are proposed:
• latest date by which the existence of this (doa) dav + 6 months
document has to be announced at national
level
• latest date by which this document has to be (dop) dav + 12 months
implemented at national level by publication of
an identical national standard or by
endorsement
• latest date by which the national standards (dow) dav + 36 months
conflicting with this document have to be (to be confirmed or
withdrawn modified when voting)
27 This document will supersede EN 50483-5:2009 and all of its amendments and corrigenda (if any).
28 prEN 50483-5:2024 includes the following significant technical changes with respect to EN 50483-5:2009:
29 — inclusion of explicit brackets in the scope of testing.
30 This is Part 5 of CENELEC standard EN 50483 “Test requirements for low voltage aerial bundled cable
31 accessories”, which has six parts:
32 — Part 1: Generalities;
33 — Part 2: Tension and suspension clamps, fittings and brackets for self supporting system;
34 — Part 3: Tension and suspension clamps for neutral messenger system;
35 — Part 4: Connectors;
36 — Part 5: Electrical ageing test;
37 — Part 6: Environmental testing.
oSIST prEN 50483-5:2024
prEN 50483-5:2024 (E)
38 Introduction
39 The objective of the EN 50483 series is to provide a method of testing the suitability of accessories when used
40 under normal operating conditions with low voltage aerial bundled cables (ABC) complying with HD 626.
41 This European Standard does not invalidate existing approvals of products achieved on the basis of national
42 standards and specifications and/or the demonstration of satisfactory service performance. However, products
43 approved according to such national standards or specifications cannot directly claim approval to this
44 European Standard. It may be possible, subject to agreement between supplier and purchaser, and/or the
45 relevant conformity assessment body, to demonstrate that conformity to the earlier standard can be used to
46 claim conformity to this standard, provided an assessment is made of any additional type testing that may
47 need to be carried out. Any such additional testing that is part of a sequence of testing cannot be done
48 separately.
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prEN 50483-5:2024 (E)
49 1 Scope
50 EN 50483 series applies to overhead line fittings for tensioning, supporting and connecting aerial bundled
51 cables (ABC) of rated voltage U /U (U ): 0,6/1 (1,2) kV.
0 m
52 This Part 5 applies to the connections described in prEN 50483-4, including branch connectors, Insulation
53 Piercing Connectors (IPC), pre-insulated lugs (terminals) and through pre-insulated connectors (sleeves).
54 Two classes of connectors are covered by this document:
55 — Class A: These are connectors intended for electricity distribution or industrial networks in which they can
56 be subjected to short-circuits of relatively high intensity and duration. As a consequence, Class A
57 connectors will be suitable for the majority of applications.
58 — Class B: These are connectors for networks in which overloads or short-circuits are rapidly cleared by the
59 operation of protection devices.
60 Depending on their application, the connectors are subjected to heat cycles and short-circuit current tests.
61 Class A: the connectors are subjected to heat cycles and short-circuit current tests.
62 Class B: the connectors are subjected to heat cycles only.
63 The object of this Part 5 is to define the heating cycles test methods and requirements which apply to
64 compression through connectors, insulation piercing connectors and all other type of connections for low
65 voltage aerial bundled cables.
66 2 Normative references
67 The following documents are referred to in the text in such a way that some or all of their content constitutes
68 requirements of this document. For dated references, only the edition cited applies. For undated references,
69 the latest edition of the referenced document (including any amendments) applies.
70 prEN 50483-1:2024, Test requirements for low voltage aerial bundled cable accessories – Part 1: Generalities
71 IEC 61238-1-2:2018, Compression and mechanical connectors for power cables – Part 1-2:Test methods and
72 requirements for insulation piercing connectors for power cables for rated voltages up to 1kV (Um=1.2kV)
73 tested on insulated conductors
74 IEC 60050-461, International Electrotechnical Vocabulary (IEV) – Part 461: Electric cables
75 3 Terms and definitions
76 For the purposes of this document, the terms and definitions given in IEC 60050-461 and the following apply.
77 ISO and IEC maintain terminology databases for use in standardization at the following addresses:
78 — ISO Online browsing platform: available at https://www.iso.org/obp/
79 — IEC Electropedia: available at https://www.electropedia.org/
80 3.1
81 adiabatic
82 occurring with no addition or loss of heat from the system under consideration
83 3.2
84 aerial bundled cable (ABC)
85 aerial cable consisting of a group of insulated conductors which are twisted together including, or not, a non
86 insulated conductor
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prEN 50483-5:2024 (E)
87 [SOURCE: IEV 461-08-02, modified]
88 Note 1 to entry: The terms bundled conductors, bundled cables, bundled cores, conductor bundles and bundle could be
89 used as equivalent to the term aerial bundled cable (ABC).
90 3.3
91 aerial-insulated-cable
92 insulated cable designed to be suspended overhead and outdoors
93 [SOURCE: IEV 461-08-01]
94 3.4
95 branch connector
96 metallic device for connecting a branch conductor to a main conductor at an intermediate point on the latter
97 [SOURCE: IEV 461-17-05]
98 3.5
99 branch conductor
100 conductor connected to the main conductor by a connector
101 3.6
102 conductor insulation
103 insulation applied on a conductor
104 [SOURCE: IEV 461-02-02, modified]
105 3.7
106 conductor (of a cable)
107 part of a cable which has the specific function of carrying current
108 [SOURCE: IEV 461-01-01]
109 3.8
110 connector
111 metallic device to connect cable conductors together
112 [SOURCE: IEV 461-17-03]
113 3.9
114 core
115 assembly comprising conductor and its own insulation
116 [SOURCE: IEV 461-04-04, modified]
117 3.10
118 equalizer
119 arrangement used in the test loop to ensure a point of equipotential and uniform current distribution in a
120 stranded conductor
121 [SOURCE: IEC 61238-1-2:2018, 3.5]
122 3.11
123 insulation (of a cable)
124 insulating materials incorporated in a cable with the specific function of withstanding voltage [IEV 461-02-01]
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prEN 50483-5:2024 (E)
125 3.12
126 insulation piercing connector (IPC)
127 connector in which electrical contact with the conductor is made by metallic protrusions which pierce the
128 insulation of the ABC core
129 [SOURCE: IEV 461-11-08, modified]
130 3.13
131 median connector
132 connector which during the first heat cycle records the third highest temperature of the six connectors in the
133 test loop
134 3.14
135 pre-insulated (terminal) lug
136 insulated metallic device for connecting an insulated cable conductor to other electrical equipment
137 [SOURCE: IEC 61238-1-2:2018, 3.8]
138 3.15
139 pre-insulated through connector (sleeve)
140 insulated metallic device for connecting two consecutive lengths of insulated conductors
141 3.16
142 reference conductor
143 length of conductor(s) without any joints, which is included in the test loop and which enables the reference
144 temperature and reference resistance(s) to be determined
145 3.17
146 reusable connector
147 connector for connecting ABC to stripped cable or bare conductor where only the branch connection can be
148 reused
149 3.18
150 sheath
151 uniform and continuous tubular covering of metallic or non metallic material, generally extruded
152 [SOURCE: IEV 461-05-03]
153 3.19
154 shear head
155 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
156 torque
157 3.20
158 type test
159 test required to be made before supplying a type of material covered by this standard on a general
160 commercial basis, in order to demonstrate satisfactory performance characteristics to meet the intended
161 application
162 Note 1 to entry: These tests are of such a nature that, after they have been made, they need not be repeated unless
163 changes are made to the accessory materials, design or type of manufacturing process which might change the
164 performance characteristics.
165 4 Symbols
A, A , A electrical cross-sectional area of the conductors
1 2
D conductor diameter
oSIST prEN 50483-5:2024
prEN 50483-5:2024 (E)
D equalizer diameter
Eq
d conductor length between connectors
I direct current flowing through a connection during resistance measurement
I equivalent r.m.s. short-circuit current
rms
I alternating current necessary to maintain the reference conductor at its
N
equilibrium temperature
ℓ , ℓ , ℓ lengths of the conductor assembly associated with the measurement points
a b j
after jointing
ℓ length of equalizer
e
ℓ ℓ , ℓ length of the reference conductor between measurement points
r, ra rb
R , R linear resistance of conductors of respectively cross-section A and A
1 2 1 2
R , R , R the calculated resistance between two equalizers and corrected to 20 °C
20 ra rb
TC thermocouple
t heating period within heat cycle
t cooling period within heat cycle
t time period to reach the required temperature on the reference cable
1-a
t time period of stable temperature on the median connector
1-b
U potential difference between measurement points of reference conductor of
AB
cross-section A
U potential difference between measurement points of the connector
CD
U potential difference between measurement points of reference conductor of
EF
cross-section A
𝛼𝛼 temperature coefficient of resistance at 20 °C
𝛽𝛽 mean scatter of the connector resistance factors
Δθ temperature difference between reference cable and connector
j
𝛿𝛿 initial scatter of the connector resistance factors
𝜆𝜆 resistance factor ratio; change in the resistance of the connector relative to its
initial resistance
𝜃𝜃 temperature of a connector while measuring resistances
θ maximum temperature recorded on a connector over the total period of test
max
θ highest rated temperature of insulating compound in normal operation
N
θ temperature of the reference conductor determined in the first heat cycle
R
θ temperature of the reference conductor while measuring resistances
r
θ temperature of the reference conductor at the moment of measuring θ
ref max
oSIST prEN 50483-5:2024
prEN 50483-5:2024 (E)
166 5 Type test
167 5.1 Principle
168 Connectors shall be subjected to 1 000 cycles of heating and cooling. The cold resistance of the connectors
169 shall be measured at specific steps to determine their suitability when used with conductors carrying a load.
170 Heat cycle and, short-circuit tests shall be made with alternating current.
171 Direct current may be used for heat cycle only when agreed between the customer and the manufacturer
172 and/or the supplier.
173 5.2 Test arrangement
174 5.2.1 Installation
175 5.2.1.1 General
176 The test circuit shall be as shown in Figure 5, 6, 7 8 or 9.
177 Figures 5, 6, 7 8 and 9 represent the test circuits respectively for main and branch connectors having equal
178 cross-sections and linear resistance(s); for main and branch connectors having unequal cross-sections and
179 linear resistance(s); for through connectors having equal or unequal cross-sections and linear resistance(s);
180 for terminal lugs.
181 5.2.1.2 Optional immersion test
182 prEN 50483-6:2024, 8.4.3.1 provides an optional immersion test for samples which are intended for use in
183 saline polluted areas. When the inclusion of this test has been agreed between the customer and the
184 manufacturer and/or the supplier, this heat cycle test shall be modified to accommodate immersion of the test
185 samples during each cycle.
186 5.2.2 Disconnection devices
187 The test circuit may include sectioning joints so that it can be dismantled and short-circuit tests can be made
188 easily.
189 In Figure 6, the disconnection devices (X) are
190 • closed when the circuit is carrying heating current, and
191 • opened when resistance measurements and short-circuit applications are being made.
192 The sectioning joints shall be arranged and constructed so that they do not significantly affect the
193 measurements.
194 5.2.3 Conductors
195 Phase and neutral conductors including reference conductors used in the test circuit shall remain insulated
196 (except bare conductors).
197 5.2.4 Method of measuring ambient temperature
198 It is important that ambient temperature is measured accurately and is not affected by the heating produced
199 by the test. The following provides a proven method for achieving this measurement though alternative
200 methods can be used.
201 Ambient temperature shall be measured at the middle of the test loop with a thermocouple whose junction is
202 placed in a polished metallic tube manufactured from metal foil formed into a cylinder. Its height shall be
203 100 mm and its diameter shall be between 35 mm and 45 mm. The thermocouple shall be located
204 approximately at one third of the tube height from its upper end and fitted to it (e.g. with a cross-support).
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prEN 50483-5:2024 (E)
205 5.2.5 Ambient conditions
206 The test loop shall be installed in a location where the air is not disturbed. The ambient temperature of the test
207 location shall be between 15 °C and 30 °C.
208 During the connector installation and resistance measurements, ambient temperature shall remain within the
209 limits of (23 ± 3) °C and recorded.
210 5.2.6 Equalizers
211 For stranded conductors, potential between the strands at measuring points can cause errors in measuring
212 electrical resistance.
213 Welded or soldered equalizers, as shown in Annex A, shall be used to overcome this problem, and to ensure
214 uniform current distribution in the reference conductor. Welded or soldered equalizers shall be the
215 recommended methods to ensure reliable measurements.
216 Other methods may be used provided that they give comparable results and do not affect the temperature of
217 the connectors or the reference conductor.
218 Annex A provides details on the construction of welded equalizers.
219 5.2.7 Lengths and configurations of conducting paths
221 Key
1 conductor 1
2 conductor 2
3 conductor 3
4 branch connector
5 sleeve connector
A, B, C, D, E, F equalizers (see Annex A)
A and A
cross-sections relative to conductivity of the conductors 1 and 2 in mm
1 2
A, B potential points for measuring the potential difference between the extremities of the reference
conductor corresponding to conductor of cross-section A
oSIST prEN 50483-5:2024
prEN 50483-5:2024 (E)
E, F potential points for measuring the potential difference between the extremities of the reference
conductor corresponding to conductor of cross-section A
ℓ
distance between potential points A and B
ra
C, D potential points for measuring the potential difference between the extremities of the related
connector
ℓ
distance between potential points E and F
rb
ℓ
distance between C and the nearest surface of the connector body
a
ℓ
distance between D and the nearest surface of the connector body
b
222 ℓ and ℓ are dependent on the cross-section A of the related conductor according to the Table 1 below.
a b
223 Figure 1 — Lengths and configurations of conducting paths
224 The conducting path lengths (see Figure 1, 5, 6, 7 8 or 9) shall comply with Table 1.
225 Table 1 — Conducting path lengths
Conductor cross-section A Nominal distances ℓ or ℓ
a b
mm
mm
A ≤ 50 150
50 < A ≤ 120 200
120 < A ≤ 240 250
226 If A ≠ A , the cross-section of the reference conductor related to conductor A shall be A and the cross-
1 2 1 1
227 section of the reference conductor related to A shall be A . Both reference conductors shall have the same
2 2
228 length ℓ = ℓ + ℓ .
r a b
229 Potential points shall be placed at a distance ℓ and ℓ from the nearest surface of the connector body.
a b
230 Conductor length between connectors shall be a distance d, expressed in millimetres, at least equal to 80 √A,
231 subject to a minimum of 500 mm. In the case of branch connectors, A shall be the cross-section of main
232 conductor.
233 Where a test loop comprises of only one cross-section of conductor, a single reference conductor shall be
234 used.
235 Where a test loop comprises of more than one cross-section of conductor, one reference conductor shall be
236 required for each cross-section.
237 One (two) insulated length(s) of conductor(s) that constitute the heating loop shall be called the reference
238 conductor(s); there shall be a potential point at each of its (their) extremities.
239 The reference conductor shall not have its insulation removed if insulated. In order to control the test a
240 thermocouple shall be placed at the mid point of the reference conductor.
241 The reference conductor shall be of sufficient length to prevent thermal interference from its end terminations.
242 In the case of unequal cross-sections, both references conductors of lengths ℓ and ℓ shall reach the defined
ra rb
243 reference temperatures.
244 5.3 Test specimen
245 5.3.1 Setting up of the test loop
246 The conductors shall be identified by their cross-section A and A so that the resistance R of the conductor
1 2 1
247 with cross-section A is less than the resistance R of the conductor with cross-section A .
1 2 2
248 Where R = R then the conductor will be referred to by its cross-section A .
1 2 1
249 Conductor resistances R and R are measured in the same periodicity as connector resistance.
1 2
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prEN 50483-5:2024 (E)
250 Various types of test loops are defined in Figures 5 to 9.
251 Where A = A , the test loop shall consist of
1 2
252 • six identical connectors,
253 • one conductor of cross-section A with linear resistance R ,
1 1
254 • one reference conductor of length ℓ on cross-section A
...