kSIST FprEN 50483-2:2025
(Main)Test requirements for low voltage aerial bundled cable accessories - Part 2: Tension and suspension clamps, fittings and brackets for self supporting system
Test requirements for low voltage aerial bundled cable accessories - Part 2: Tension and suspension clamps, fittings and brackets for self supporting system
The EN 50483 series applies to overhead line fittings for tensioning, supporting and connecting aerial bundled cables (ABC) of rated voltage U0/U (Um): 0,6/1 (1,2) kV.
This document applies to tensioning devices consisting of tension and suspension clamps, fittings and brackets designed to be used for installation of self-supporting ABC defined in HD 626 S2.
Tests described in this document are type tests.
Prüfanforderungen für Bauteile für isolierte Niederspannungsfreileitungen - Teil 2: Abspann- und Tragklemmen für selbsttragende isolierte Freileitungsseile
Prescriptions relatives aux essais des accessoires pour réseaux aériens basse tension torsadés - Partie 2: Matériels d’ancrage et de suspension pour réseaux aériens en conducteurs isolés torsadés auto-portés
Zahteve za preskušanje pribora za nizkonapetostne izolirane nadzemne kable - 2. del: Napenjalne in vzmetne objemke, zatezne in nosilne sponke za samonosilne sisteme
General Information
Relations
Standards Content (Sample)
SLOVENSKI STANDARD
oSIST prEN 50483-2:2024
01-december-2024
Zahteve za preskušanje pribora za nizkonapetostne izolirane nadzemne kable - 2.
del: Napenjalne in vzmetne objemke, zatezne in nosilne sponke za samonosilne
sisteme
Test requirements for low voltage aerial bundled cable accessories - Part 2: Tension and
suspension clamps, fittings and brackets for self supporting system
Prüfanforderungen für Bauteile für isolierte Niederspannungsfreileitungen - Teil 2:
Abspann- und Tragklemmen für selbsttragende isolierte Freileitungsseile
Prescriptions relatives aux essais des accessoires pour réseaux aériens basse tension
torsadés - Partie 2: Matériels d’ancrage et de suspension pour réseaux aériens en
conducteurs isolés torsadés auto-portés
Ta slovenski standard je istoveten z: prEN 50483-2
ICS:
29.240.20 Daljnovodi Power transmission and
distribution lines
oSIST prEN 50483-2:2024 en
2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.
oSIST prEN 50483-2:2024
oSIST prEN 50483-2:2024
EUROPEAN STANDARD DRAFT
prEN 50483-2
NORME EUROPÉENNE
EUROPÄISCHE NORM
October 2024
ICS 29.240.20 Will supersede EN 50483-2:2009
English Version
Test requirements for low voltage aerial bundled cable
accessories - Part 2: Tension and suspension clamps, fittings
and brackets for self supporting system
Prescriptions relatives aux essais des accessoires pour Prüfanforderungen für Bauteile für isolierte
réseaux aériens basse tension torsadés - Partie 2: Niederspannungsfreileitungen - Teil 2: Abspann- und
Matériels d'ancrage et de suspension pour réseaux aériens Tragklemmen für selbsttragende isolierte Freileitungsseile
en conducteurs isolés torsadés auto-portés
This draft European Standard is submitted to CENELEC members for enquiry.
Deadline for CENELEC: 2025-01-03.
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: 79844 Ref. No. prEN 50483-2 E
oSIST prEN 50483-2:2024
prEN 50483-2:2024 (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 Characteristics . 7
8 6 Marking . 7
9 7 General test conditions . 8
10 7.1 Mechanical tests . 8
11 7.2 Temperature . 8
12 8 Type tests . 8
13 8.1 Type tests for tension clamps . 8
14 8.2 Type tests for suspension clamps . 12
15 8.3 Dielectrical voltage tests . 20
16 8.4 Clamp bolt tightening test . 21
17 8.5 Tests on brackets . 22
18 8.6 Environmental tests . 23
19 Bibliography . 27
oSIST prEN 50483-2:2024
prEN 50483-2:2024 (E)
20 European foreword
21 This document [prEN 50483-2:2024] has been prepared by WG 11 of CLC/TC 20 “Electric Cables”.
22 This document is currently submitted to the Enquiry.
23 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)
24 This document will supersede EN 50483-2:2009 and all of its amendments and corrigenda (if any).
25 prEN 50483-2:2024 includes the following significant technical changes with respect to EN 50483-2:2009:
26 This is Part 2 of CENELEC standard EN 50483 “Test requirements for low voltage aerial bundled cable
27 accessories”, which has six parts:
28 — Part 1: Generalities;
29 — Part 2: Tension and suspension clamps, fittings and brackets for self supporting system;
30 — Part 3: Tension and suspension clamps for neutral messenger system;
31 — Part 4: Connectors;
32 — Part 5: Electrical ageing test;
33 — Part 6: Environmental testing.
oSIST prEN 50483-2:2024
prEN 50483-2:2024 (E)
34 Introduction
35 The objective of the EN 50483 series is to provide a method of testing the suitability of accessories when used
36 under normal operating conditions with low voltage aerial bundled cables (ABC) complying with HD 626.
37 This European Standard does not invalidate existing approvals of products achieved on the basis of national
38 standards and specifications and/or the demonstration of satisfactory service performance. However, products
39 approved according to such national standards or specifications cannot directly claim approval to this
40 European Standard. It may be possible, subject to agreement between the customer and the manufacturer
41 and/or the supplier, and/or the relevant conformity assessment body, to demonstrate that conformity to the
42 earlier standard can be used to claim conformity to this standard, provided an assessment is made of any
43 additional type testing that may need to be carried out. Any such additional testing that is part of a sequence
44 of testing cannot be done separately.
oSIST prEN 50483-2:2024
prEN 50483-2:2024 (E)
45 1 Scope
46 EN 50483 series applies to overhead line fittings for tensioning, supporting and connecting aerial bundled
47 cables (ABC) of rated voltage U /U (U ): 0,6/1 (1,2) kV.
0 m
48 This Part 2 applies to tensioning devices consisting of tension and suspension clamps, fittings and brackets
49 designed to be used for installation of self supporting ABC defined in HD 626.
50 Tests described in this document are type tests.
51 2 Normative references
52 The following documents are referred to in the text in such a way that some or all of their content constitutes
53 requirements of this document. For dated references, only the edition cited applies. For undated references,
54 the latest edition of the referenced document (including any amendments) applies.
55 prEN 50483-1:2024, Test requirements for low voltage aerial bundled cable accessories — Part 1:
56 Generalities
57 prEN 50483-6:2024, Test requirements for low voltage aerial bundled cable accessories — Part 6:
58 Environmental testing
59 HD 626, Overhead distribution cables of rated voltage U /U(U ): 0,6/1 (1,2) kV
o m
60 IEC 60050-461, International Electrotechnical Vocabulary (IEV) — Part 461: Electric cables
61 3 Terms and definitions
62 For the purposes of this document, the terms and definitions given in IEC 60050-461 and the following apply.
63 ISO and IEC maintain terminology databases for use in standardization at the following addresses:
64 — ISO Online browsing platform: available at https://www.iso.org/obp/
65 — IEC Electropedia: available at https://www.electropedia.org/
66 3.1
67 aerial bundled cable (ABC)
68 aerial cable consisting of a group of insulated conductors which are twisted together including, or not, a non
69 insulated conductor
70 [SOURCE: IEV 461-08-02, modified]
71 Note 1 to entry: The terms bundled conductors, bundled cables, bundled cores, conductor bundles and bundle could be
72 used as equivalent to the term aerial bundled cable (ABC).
73 3.2
74 aerial insulated cable
75 insulated cable designed to be suspended overhead and outdoors
76 [SOURCE: IEV 461-08-01]
77 3.3
78 angle of deviation
79 complementary angle to the angle defined by the two parts of the cable on both sides of the suspension clamp
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prEN 50483-2:2024 (E)
80 3.4
81 clamp bolt
82 bolt which tightens two parts of a clamp together
83 3.5
84 conductor insulation
85 insulation applied on a conductor
86 [SOURCE: IEV 461-02-02, modified]
87 3.6
88 conductor (of a cable)
89 part of a cable which has the specific function of carrying current
90 [SOURCE: IEV 461-01-01]
91 3.7
92 core
93 assembly comprising conductor and its own insulation
94 [SOURCE: IEV 461-04-04, modified]
95 3.8
96 bracket (or fitting)
97 device for attaching ABC tension or/and suspension clamps to a pole or to a wall
98 3.9
99 insulation (of a cable)
100 insulating materials incorporated in a cable with the specific function of withstanding voltage
101 [SOURCE: IEV 461-02-01]
102 3.10
103 minimum breaking load (MBL)
104 minimum breaking load of the conductor given by HD 626 or the cable manufacturer if not defined in the
105 standard, or minimum breaking load of the clamp given by the clamp manufacturer
106 3.11
107 self supporting system
108 aerial insulated system where all the cores of the ABC contribute to its support
109 3.12
110 sheath
111 uniform and continuous tubular covering of metallic or non-metallic material, generally extruded
112 [SOURCE: IEV 461-05-03]
113 3.13
114 suspension clamp
115 device which attaches an aerial insulated cable to a bracket in order to carry its weight and any specified
116 loading
117 [SOURCE: IEV 461-18-02, modified]
118 3.14
119 tension clamp
120 device which firmly attaches an aerial insulated cable to a support and is designed to transmit the specified
121 mechanical tension in the cable or messenger to the supporting structure
oSIST prEN 50483-2:2024
prEN 50483-2:2024 (E)
122 [SOURCE: IEV 461-18-01,]
123 3.15
124 service clamp
125 device which firmly attaches an aerial insulated cable to a support and is designed to transmit a mechanical
126 tension in the cable or messenger to the supporting structure lower than the ABC MBL
127 3.16
128 standard load clamp
129 device which firmly attaches an aerial insulated cable to a support and is designed to transmit a normal
130 mechanical tension in the cable or messenger to the supporting structure
131 3.17
132 type test
133 test required to be made before supplying a type of material covered by this standard on a general
134 commercial basis, in order to demonstrate satisfactory performance characteristics to meet the intended
135 application
136 Note 1 to entry: These tests are of such a nature that, after they have been made, they need not be repeated unless
137 changes are made to the accessory materials, design or type of manufacturing process which might change the
138 performance characteristics.
139 3.18
140 bracket (or fitting)
141 device for attaching ABC tension or/and suspension clamps to a pole or to a wall
142 4 Symbols
g slippage after 15 cycles
g slippage after 250 cycles
D circumscribed diameter of conductor bundle (mm)
ρ resistivity (Ωm)
α maximum angle (°) of deviation of a suspension clamp as recommended by the manufacturer
and/or supplier or specified by the customer
T tension (N)
F sliding force (N)
143 5 Characteristics
144 These fittings shall be capable of supporting the tensile loads applied to the ABC for which they are designed
145 in accordance with the following tests.
146 Tension and suspension equipment shall be designed to avoid any direct or accidental contact between
147 conductors and between any phase and metallic parts of the clamp.
148 6 Marking
149 See Clause 6 of prEN 50483-1:2024.
oSIST prEN 50483-2:2024
prEN 50483-2:2024 (E)
150 7 General test conditions
151 7.1 Mechanical tests
152 See Clause 9 of prEN 50483-1:2024.
153 7.2 Temperature
154 See Clause 9 of prEN 50483-1:2024.
155 8 Type tests
156 8.1 Type tests for tension clamps
157 8.1.1 General
158 The performance characteristics of all tension clamps shall be proven by satisfactorily undergoing the range of
159 tests listed below. Each clamp shall be tested for the smallest and largest bundled conductor size for which it
160 is marked.
161 The following type tests shall be carried out.
Test Subclause
Tensile test at ambient temperature 8.1.2
Breaking load test 8.1.3
Tensile test at high temperature 8.1.4
Tensile test at low temperature 8.1.5
Dielectrical voltage test (clamp) 8.3.1
Dielectrical voltage test (ABC) 8.3.2
Clamp bolt tightening test 8.4
Environmental tests 8.5
162 NOTE The test procedures for 3 core and 4 core ABC are similar.
163 8.1.2 Tensile test at ambient temperature
164 8.1.2.1 Principle
165 The tension clamps shall be subjected to high mechanical loads at ambient temperature in order to ensure
166 that they are capable of sustaining loads likely to be encountered in service without being damaged or
167 damaging the conductor.
168 The test may be carried out on samples which have been subjected to the climatic ageing test (see 8.6.2).
169 8.1.2.2 Test arrangement
170 Two tension clamps shall be assembled on to the ABC, in accordance with the manufacturer’s instructions,
171 and fitted into a tensile testing machine as shown in Figure 1. The length of tails on the unloaded side of the
172 clamps shall be a minimum of 350 mm and with a minimum radius of 250 mm.
173 For bolt tightened clamp, the tested clamp should be tightened at the minimum torque. If the clamp is
174 equipped with shearheads, the tightening torque should be at the minimum of the manufacturer’s declared
175 shearhead range.
176 The span between the two clamps shall be a minimum of 100 × D, where D is the circumscribed diameter of
177 the ABC.
oSIST prEN 50483-2:2024
prEN 50483-2:2024 (E)
178 The test shall be carried out at ambient temperature.
179 Dimensions in millimetres
181 Key
1 tension clamp 4 marking
2 second tension clamp undergoing test 5 low temperature zone
3 length of tail ≥ 350 mm 6 arrangement for low temperature testing
182 Figure 1 — Tension clamps — Tensile tests
183 8.1.2.3 Procedure
184 The tensile load shall be applied within 15 min of the clamp being assembled on to the ABC.
185 The load shall be increased to 20 % of MBL of the cable, and the cores shall be marked where they exit the
186 clamps. The load shall be maintained at that value ± 10 % for 6 h.
187 A reduced time period may be agreed between customer and manufacturer and/or supplier.
188 The load shall then be increased to a limit of 80 % of the MBL of the cable for ABC sizes up to, and including,
2 2
189 95 mm . For conductor cross sections above 95 mm the load shall be reduced to a limit of 60 % of the MBL
190 of the cable. This load shall be held for 60 s before the load is removed.
191 When a clamp of a different rating is needed the clamp may be tested according to the value agreed by the
192 manufacturer and/or supplier and the customer. If the MBL of the clamp is lower than 20 % of the conductor
193 MBL, then the tensile load is increased to the MBL of the clamp for 60 s. When the MBL of the clamp is lower
194 than 80 % (60 % for sections above 95 mm ) and higher than 20 % of the conductor MBL, then the tensile
195 load is increased to 20 % of the MBL of the cable and maintained for 6 h. Then the tensile load is increased to
196 the clamp MBL and maintained for 60 s.
197 8.1.2.4 Requirements
198 No damage shall occur, which would affect the correct function of the tension clamp.
199 Slippage of the cores of the cable with respect to the clamp parts when in contact shall not exceed 10 mm.
200 The clamp shall pass the dielectrical voltage test detailed in 8.3.1.
201 The cable shall pass the dielectrical voltage test detailed in 8.3.2.
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prEN 50483-2:2024 (E)
202 8.1.3 Breaking load test
203 8.1.3.1 Principle
204 The tension clamps shall be subjected to increasing mechanical loads, at ambient temperature, in order to
205 ensure that they do not break before loads equal to or greater than the MBL of the maximum ABC size, for
206 which the clamp is designed, are reached.
207 NOTE This test will be carried out on samples which have previously been subjected to the corrosion ageing test
208 (8.5.1).
209 8.1.3.2 Test arrangement
210 Two tension clamps shall be assembled in accordance with the manufacturer’s instructions on a simulated
211 ABC made of metallic round bars or a suitable conductor of the same diameter as the ABC core and fitted into
212 a tensile testing machine as shown in Figure 1.
213 To avoid any slippage between bars and the clamps, fixed stops may be used on the bars.
214 The test shall be carried out at ambient temperature.
215 8.1.3.3 Procedure
216 The tensile load shall be applied within 15 min of the clamp being assembled.
217 The load shall be increased to the MBL of the largest size of ABC core for which the clamp is designed. It
218 shall be maintained at this load for 60 s.
219 The load shall then be increased until the breaking of the tension clamp occurs.
220 When requested by the customer a different load may be increased to the MBL of the clamp given by the
221 manufacturer to check the breaking load of the clamp.
222 The clamps shall not be tightened or adjusted during the test.
223 NOTE The failure value can be noted for information.
224 8.1.3.4 Requirements
225 Neither tension clamp shall break until the test load has been held for 60 s and the MBL of the cable is
226 reached.
227 8.1.4 Tensile test at high temperature
228 8.1.4.1 Principle
229 The tension clamps shall be subjected to steady load, whilst the cable temperature is varied. The test shall be
230 carried out in order to ensure that the cable does not slip through the clamp and that the clamp and the cable
231 remain undamaged.
232 When a clamp of lower rating is required, for example a service clamp, this test may be omitted when agreed
233 between the customer and manufacturer and/or supplier.
234 8.1.4.2 Test arrangement
235 Two tension clamps shall be assembled on to the ABC in accordance with the manufacturer’s instructions and
236 fitted into a tensile testing machine as shown in Figure 1.
237 For bolted clamps, the tested clamp should be tightened at the maximum torque. If the clamp has shearheads,
238 the tightening torque should be at the maximum of the manufacturer’s declared range for shearhead.
239 The span between the two clamps shall be a minimum of 100 × D, where D is the circumscribed diameter of
240 the ABC.
241 The test shall be carried out with a static load, which shall be found from Table 1.
oSIST prEN 50483-2:2024
prEN 50483-2:2024 (E)
242 Table 1 — Static loads
Number of cores Tension load (T) for the tensile test at high temperature
in the ABC
2 18 % of the ABC MBL
4 20 % of the ABC MBL
NOTE When a clamp of lower rating is needed, the clamp may be tested according to
another value agreed between the manufacturer and/or supplier and the customer.
243 8.1.4.3 Procedure
244 The temperature shall be varied by passing current through the conductors.
245 For 2-conductor ABC the current shall flow in both conductors and for 4-conductor ABC the current shall flow
246 in 3 conductors.
247 Tails of a minimum 350 mm long shall remain outside the two tension clamps to provide connection to the
248 current source.
249 When the test load is reached for the first time; the cores shall be marked where they exit from the clamps.
250 These marks shall be used for reference purposes to measure slippage.
251 The clamps shall not be tightened or adjusted during the test.
252 The test shall comprise of 100 heat cycles at a rate of 2 cycles per day during which time the tensile load shall
253 be stabilized at ± 10 % or adjusted at least once a day within ± 5 % of the value defined in 8.1.3.2.
254 The temperature shall be measured underneath the insulation with a thermocouple.
255 NOTE 1 For further information on thermocouple application, see prEN 50483-5:2024, 5.4.1.
256 The temperature shall be measured at a position which is not under mechanical tension. The measuring
257 position shall be at least 1 m from the tension clamp and the end of the ABC. It shall also be at the same
258 horizontal level as the tension clamp in order to avoid any difference in air temperature.
259 Each temperature cycle shall consist of
260 • initial temperature shall be ambient,
261 • the conductor temperature shall be gradually increased to (70 ± 3) °C, in less than 2 h,
262 • this high temperature shall be maintained for 8 h,
263 • the conductor shall be allowed to cool naturally to ambient temperature before the next cycle begins.
264 8.1.4.4 Requirements
265 No damage shall occur, which could affect the correct function of the tension clamp.
266 After 10 days of testing, the slippage of the cores or core of the cable with respect to the clamp parts that are
267 in contact with the cores shall not exceed 10 mm.
268 At the end of the testing, slippage of the cores or core of the cable with respect to the clamp parts that are in
269 contact with the cores shall not exceed 12 mm from the starting position.
270 The clamp shall pass the dielectrical voltage test detailed in 8.3.1.
271 The ABC core shall pass the dielectrical voltage test detailed in 8.3.2.
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prEN 50483-2:2024 (E)
272 8.1.5 Tensile test at low temperature
273 8.1.5.1 Principle
274 The tension clamps shall be subjected to a steady load, whilst at least one tension clamp and the part of the
275 cable close to the clamp are held at low temperature. The test shall be carried out in order to ensure that the
276 cable does not slip through the clamp and that the clamp and the cable remain undamaged.
277 8.1.5.2 Test arrangement
278 Two tension clamps shall be assembled on to the ABC in accordance with the manufacturer’s instructions and
279 fitted into a tensile testing machine as shown in Figure 1.
280 For bolted clamps, the tested clamp should be tightened at the minimum torque. If the clamp has shearheads,
281 the tightening torque should be at the minimum of the manufacturer’s declared range for shearhead.
282 The span between the two clamps shall be a minimum of 100 x D, where D is the circumscribed diameter of
283 the ABC.
284 The test is carried out with a static load, which shall be found from Table 2.
285 Table 2 — Static loads
Number of cores Tension load (T) for the tensile test at low temperature
in the ABC
2 40 % of the ABC MBL
4 25 % of the ABC MBL
NOTE When a clamp of lower rating is needed, the clamp may be tested according to
another value agreed between the manufacturer and/or supplier and the customer.
286 8.1.5.3 Procedure
287 The cores shall be marked at the point where they exit the tension clamps. These marks shall be used for
288 reference purposes to measure slippage. Marking shall be applied at a core loading of 10 N/mm before initial
289 cooling.
290 At least one tension clamp and a 300 mm section of the ABC shall be cooled to −10 °C for 24 h during which
291 time a tensile load is maintained at the value determined from Table 2 with a tolerance of ± 10 %.
292 NOTE See prEN 50483-1:2024, 9.1, for information on the use of a lower temperature.
293 The tension clamps and cable shall be maintained at the above load and temperature for 24 h.
294 The clamps shall not be tightened or adjusted during the test.
295 8.1.5.4 Requirements
296 No damage shall occur, which could affect the correct funct
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