《bs英國標(biāo)準(zhǔn)】bs en 504835 test requirements for low voltage aerial bundled cable accessories — part 5 electrical ageing test》由會員分享，可在線閱讀，更多相關(guān)《bs英國標(biāo)準(zhǔn)】bs en 504835 test requirements for low voltage aerial bundled cable accessories — part 5 electrical ageing test（40頁珍藏版）》請?jiān)谘b配圖網(wǎng)上搜索。
1、如果買家需要PDF格式的本標(biāo)準(zhǔn)，可以提供郵箱給我（前提是購買了本標(biāo)準(zhǔn)），我免費(fèi)發(fā)送到你的郵箱。
標(biāo)
標(biāo)
準(zhǔn)
王
國
豆丁網(wǎng)標(biāo)準(zhǔn)下載地址
BS EN 50483-5:2009
BSI British Standards
Test requirements for low
voltage aerial bundled cable accessories —
Part 5: Electrical ageing test
2、
NO COPYING WITHOUT BSI PERMISSION EXCEPT AS PERMITTED BY COPYRIGHT LAW
raising standards worldwide?
BS EN 50483-5:2009
BRITISH STANDARD
National foreword
This British Standard is the UK implementation of EN 50483-5:2009.
The UK participation
3、in its preparation was entrusted by Technical Committee
GEL/20, Electric cables, to Subcommittee GEL/20/11, Cable accessories.
A list of organizations represented on this committee can be obtained on request to its secretary.
This publication does not purport to include all the necessary pro
4、visions of a contract. Users are responsible for its correct application.
?BSI 2009
ISBN 978 0 580 56181 8
ICS
Compliance with a British Standard cannot confer immunity from legal obligations.
This British Standard was published under the authority of the Standards
Policy and St
5、rategy Committee on 31 March 2009
Amendments issued since publication
Amd. No. Date Text affected
EUROPEAN STANDARD EN 50483-5
NORME EUROPéENNE
EUROP?ISCHE NORM January 2009
ICS 29.240.20
English version
Test requirements for low voltage aerial bundled cable access
6、ories - Part 5: Electrical ageing test
Prescriptions relatives aux essais
des accessoires pour réseaux aériens basse tension torsadés -
Partie 5: Essai de vieillissement électrique
Prüfanforderungen für Bauteile für isolierte
Niederspannungsfreileitungen -
Teil 5: Elektrische Alteru
7、ngsprüfungen
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-t
8、o-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
9、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,
10、 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 Electrot
11、echnical Standardization Comité Européen de Normalisation Electrotechnique Europ?isches 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 membe
12、rs.
Ref. No. EN 50483-5:2009 E
Foreword
This European Standard was prepared by a sub-group of W G 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 50483-5 on 2008-12-01.
The
13、 following dates were fixed:
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
– latest date by which the EN has to be implemented at national level by publicati
14、on of an identical
This is Part 5 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: Tens
15、ion and suspension clamps for neutral messenger system;
– Part 4: Connectors;
– Part 5: Electrical ageing test;
– Part 6: Environmental testing.
__________
Contents
1 Scope .................................................................................................
16、.............................. 4
2 Normative references ....................................................................................................... 4
3 Terms and definitions ....................................................................................................... 5
4 S
17、ymbols ........................................................................................................................... 7
5 Type test .......................................................................................................................... 8
5.1 Principle ............
18、...................................................................................................... 8
5.2 Test arrangement .................................................................................................... 8
5.3 Test specimen ...................................................
19、.................................................... 11
5.4 Measurement ........................................................................................................ 13
5.5 Heat cycle .......................................................................................................
20、...... 15
5.6 Requirements ........................................................................................................ 19
Annex A (normative) Equalizers ........................................................................................... 29
Annex B (informative) Determinat
21、ion of the value of the short-circuit current........................ 31
Annex C (informative) Recommendations to improve accuracy of measurement .................. 32
Bibliography...................................................................................................................
22、....... 33
Figures
Figure 1 – Lengths and configurations of conducting paths ................................................... 10
Figure 2 – Location of thermocouples ................................................................................... 14
Figure 3 – First heat cycle ......
23、.............................................................................................. 17
Figure 4 – Use of a concentric return conductor .................................................................... 18
Figure 5 – Test loop for branch connectors with main and branch conductors hav
24、ing
equal cross-sections and linear resistances ......................................................... 24
Figure 6 – Test loop for branch connectors with main and branch conductors having
unequal cross-sections and linear resistances ..................................................... 25
25、Figure 7 – Test loop for through connectors with conductors having equal or unequal
cross-sections and linear resistances................................................................... 26
Figure 8 – Test loop for pre-insulated lugs ............................................................
26、................ 28
Figure A.1 – Equalizers......................................................................................................... 30
Figure B.1 – Diagram of short-circuit current ......................................................................... 31
Tables
Table 1
27、– Conducting path lengths ........................................................................................ 11
Table 2 – Testing cross-sections of main and branch conductors .......................................... 12
Table 3 – Minimum elevated current heating time .....................
28、............................................ 16
Table 4 – Test requirements ................................................................................................. 23
Table A.1 – Dimensions of equalizers ..................................................................................
29、. 29
1 Scope
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 Part 5 applies to the connections described in EN 50483-4, including branch connectors, Insulation P
30、iercing Connectors (IPC), pre-insulated lugs (terminals) and through pre-insulated connectors (sleeves).
The objective is to provide a method of testing the suitability of connectors when used under normal operating conditions with low voltage aerial bundled cables complying with HD 626.
Two
31、 classes of connectors are covered by this standard:
Class A: These are connectors intended for electricity distribution or industrial networks in which they can be subjected to short-circuits of relatively high intensity and duration. As a consequence, Class A connectors will be suitable for the
32、 majority of applications.
Class B: These are connectors for networks in which overloads or short-circuits are rapidly cleared by the operation of protection devices.
Depending on their application, the connectors are subjected to heat cycles and short-circuit current tests.
Class A: the co
33、nnectors are subjected to heat cycles and short-circuit current tests.
Class B: the connectors are subjected to heat cycles only.
The object of this Part 5 is to define the heating cycles test methods and requirements which apply to compression through connectors, insulation piercing connector
34、s and all other type of connections for low voltage aerial bundled cables.
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 perfo
35、rmance. 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
36、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 No
37、rmative 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 50483 series, Test re
38、quirements for low voltage aerial bundled cable accessories
EN 61238-1:2003, Compression and mechanical connectors for power cables for rated voltages up to
36 kV (Um = 42 kV) – Part 1: Test methods and requirements (IEC 61238-1:2003, mod.)
IEC 60050-461, International Electrotechnical Vocab
39、ulary (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
adiabatic
occurring with no addition or loss of heat from the system under consideration
3.2
aerial
40、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
41、be used as equivalent to the term aerial bundled cable (ABC).
3.3
aerial-insulated-cable
insulated cable designed to be suspended overhead and outdoors
[IEV 461-08-01]
3.4
branch connector
metallic device for connecting a branch conductor to a main conductor at an intermediate point on
42、 the latter
[IEV 461-17-05]
3.5
branch conductor
conductor connected to the main conductor by a connector
3.6
conductor insulation
insulation applied on a conductor
[IEV 461-02-02, modified]
3.7
conductor (of a cable)
part of a cable which has the specific function of carrying curre
43、nt
[IEV 461-01-01]
3.8
connector
metallic device to connect cable conductors together
[IEV 461-17-03]
3.9
core
assembly comprising conductor and its own insulation
[IEV 461-04-04, modified]
3.10
equalizer
arrangement used in the test loop to ensure a point of equipotential in a str
44、anded conductor
[EN 61238-1:2003, 3.8]
3.11
insulation (of a cable)
insulating materials incorporated in a cable with the specific function of withstanding voltage
[IEV 461-02-01]
3.12
insulation piercing connector (IPC)
connector in which electrical contact with the conductor is m
45、ade by metallic protrusions which pierce the insulation of the ABC core
[IEV 461-11-08, modified]
3.13
median connector
connector which during the first heat cycle records the third highest temperature of the six connectors in the test loop
[EN 61238-1:2003, 3.11]
3.14
pre-insulated (term
46、inal) 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
reference conductor
length o
47、f conductor(s) without any joints, which is included in the test loop and which enables the reference temperature and reference resistance(s) to be determined
3.17
reusable connector
connector for connecting ABC to stripped cable or bare conductor where only the branch connection ca
48、n be reused
3.18
sheath
uniform and continuous tubular covering of metallic or non metallic material, generally extruded
[IEV 461-05-03]
3.19
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
3.20
49、
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 ha
50、ve 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
A, A1, A2 electrical cross-sectional area of the conductors
D conductor diameter
51、
DEq equalizer diameter
d conductor length between connectors
I direct current flowing through a connection during resistance measurement
Irm s equivalent r.m.s. short-circuit current
IN alternating current necessary to maintain the reference conductor at its equ
52、ilibrium temperature
la, lb, lj lengths of the conductor assembly associated with the measurement points after jointing
le length of equalizer
lr, lra , lrb length of the reference conductor between measurement points
R1, R2 linear resistance of conductors of respectively cross-se
53、ction A1 and A2
R20 , Rra, Rrb the calculated resistance between two equalizers and corrected to 20 °C
TC thermocouple
t1 heating period within heat cycle
t2 cooling period within heat cycle
t1- a time period to reach the required temperature on the reference cable
t1- b time
54、period of stable temperature on the median connector
UAB potential difference between measurement points of reference conductor of cross-section A1
UCD potential difference between measurement points of the connector
UEF potential difference between measurement points of refer
55、ence conductor of cross-section A2
α temperature coefficient of resistance at 20 °C
β mean scatter of the connector resistance factors
?θj temperature difference between reference cable and connector
δ initial scatter of the connector resistance factors
λ resistance
56、factor ratio; change in the resistance of the connector relative to its initial resistance
θ temperature of a connector while measuring resistances
θmax maximum temperature recorded on a connector over the total period of test
θN highest rated temperature of insulating compound in no
57、rmal operation
θR temperature of the reference conductor determined in the first heat cycle
θr temperature of the reference conductor while measuring resistances
θref temperature of the reference conductor at the moment of measuring θma x
5 Type test
5.1 Principle
Connectors s
58、hall be subjected to 1 000 cycles of heating and cooling. The cold resistance of the connectors shall be measured at specific steps to determine their suitability when used with conductors carrying a load.
Heat cycle and, short-circuit tests shall be made with alternating current.
NOTE Direc
59、t current may be used for heat cycle only when agreed between customer and manufacturer.
5.2 Test arrangement
5.2.1 Installation
The test circuit shall be as shown in Figure 5, 6, 7 or 8.
Figures 5, 6, 7 and 8 represent the test circuits respectively for main and branch connectors havi
60、ng equal cross-sections and linear resistance(s); for main and branch connectors having unequal cross-sections and linear resistance(s); for through connectors having equal or unequal cross-sections and linear resistance(s); for terminal lugs.
5.2.1.1 Optional immersion test
EN 50483
61、-6, 8.4.3.1 provides an optional immersion test for samples which are intended for use in saline polluted areas. W hen the inclusion of this test has been agreed between the manufacturer and the customer this heat cycle test shall be modified to accommodate immersion of the test samples
62、during each cycle.
5.2.2 Disconnection devices
The test circuit may include sectioning joints so that it can be dismantled and short-circuit tests can be made easily.
In Figure 6, the disconnection devices (X) are
? closed when the circuit is carrying heating current, and
? opened whe
63、n resistance measurements and short-circuit applications are being made.
The sectioning joints shall be arranged and constructed so that they do not significantly affect the measurements.
5.2.3 Conductors
Phase and neutral conductors including reference conductors used in the test ci
64、rcuit shall remain insulated (except bare conductors).
5.2.4 Method of measuring ambient temperature
It is important that ambient temperature is measured accurately and is not affected by the heating produced by the test. The following provides a proven method for achieving this measurement th
65、ough alternative methods can be used.
Ambient temperature shall be measured at the middle of the test loop with a thermocouple whose junction is placed in a polished metallic tube manufactured from metal foil formed into a cylinder. Its height shall be 100 mm and its diameter shall be between 35
66、mm and 45 mm. The thermocouple shall be located approximately at one third of the tube height from its upper end and fitted to it (e.g. with a cross-support).
5.2.5 Ambient conditions
The test loop shall be installed in a location where the air is not disturbed. The ambient temperature of the test location shall be between 15 °C and 30 °C.
During the connector installation and resistance measurements, ambient temperature shall remain within the limits of (23 ± 3) °C
bs英國標(biāo)準(zhǔn)】bs en 504835 test requirements for low voltage aerial bundled cable accessories — part 5 electrical ageing test
