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BS EN IEC 61238-1-3:2019+A11:2019

BS EN IEC 61238-1-3:2019+A11:2019

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Compression and mechanical connectors for power cables – Test methods and requirements for compression and mechanical connectors for power cables for rated voltages above 1 kV (Um = 1,2 kV) up to 36 kV (Um = 42 kV) tested on non-insulated conductors

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BSI 2019 50
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This part of IEC 61238 applies to compression and mechanical connectors for power cables for rated voltages above 1 kV (Um = 1,2 kV) up to 36 kV (Um = 42 kV), for example buried cables or cables installed in buildings, having

  1. conductors complying with IEC 60228 having nominal cross-sectional areas between 2,5 mm2 and 1 200 mm2 for copper and between 16 mm2 and 1 200 mm2 for aluminium, excluding Milliken conductors;

  2. a maximum continuous conductor temperature not exceeding 90 °C.

This document is not applicable to connectors for overhead line conductors nor to connectors with a sliding contact.

The object of this document is to define the type test methods and requirements which apply to compression and mechanical connectors for power cables with copper or aluminium conductors. The reference method is to perform the tests on unused conductors.

PDF Catalog

PDF Pages PDF Title
2 undefined
5 Blank Page
6 Annex ZA (normative) Normative references to international publications with their corresponding European publications
7 CONTENTS
10 FOREWORD
12 INTRODUCTION
13 1 Scope
2 Normative references
3 Terms and definitions
15 4 Symbols
16 5 General
5.1 Definition of classes
5.2 Conductor
17 5.3 Connectors and installation procedure
5.4 Range of approval
18 6 Electrical tests
6.1 Installation
6.1.1 General
19 6.1.2 Through connectors and terminations
6.1.3 Branch connectors
6.2 Measurements
6.2.1 General
6.2.2 Electrical resistance measurements
20 6.2.3 Temperature measurements
6.3 Heat cycling test
6.3.1 General
6.3.2 First heat cycle
21 6.3.3 Second heat cycle
Tables
Table 1 – Minimum period of temperature stability
22 6.3.4 Subsequent heat cycles
Figures
Figure 1 – Example of second heat cycle profile
23 6.4 Short-circuit test
6.4.1 General
6.4.2 Aluminium conductors with cross-sectional areas below 1 000 mm2 and copper conductors with cross-sectional areas below 630 mm2
Table 2 – Electrical resistance measurements during the electrical test
24 6.4.3 Aluminium conductors with cross-sectional areas ≥ 1 000 mm2 and copper conductors with cross-sectional areas ≥ 630 mm2
6.5 Assessment of results
6.6 Requirements
25 6.7 Examples of electrical test loop configurations and associated parameters
Table 3 – Electrical test requirements
27 Figure 2 – Typical electrical test loops for through connectors and terminal lugs
28 Figure 3 – Typical electrical test loop for branch connectors
31 7 Mechanical test
7.1 General
7.2 Method
Figure 4 – Typical cases of resistance measurements
32 7.3 Requirements
8 Test report
8.1 General
8.2 Electrical tests
8.3 Mechanical test
Table 4 – Selection of tensile force withstand values for the mechanical test
33 Annex A (normative) Equalizers and their preparation
A.1 Requirements for equalizers
A.2 Recommendations for welding equalizers
34 Figure A.1 – Preparation of equalizers
35 Annex B (normative) Measurements
B.1 Potential measuring positions for typical connectors
B.2 Temperature measurement
B.3 Equivalent conductor resistance
36 Annex C (informative) Recommendations to decrease uncertainties of measurement
C.1 Handling the test loop
C.2 Measurements, instruments and readings
37 Annex D (normative) Calculation of adiabatic short-circuit current
Table D.1 – Material properties
38 Annex E (informative) Determination of the value of the short-circuit current
Figure E.1 – Determination of equivalent RMS valueof current during the short-circuit test
39 Annex F (normative) Calculation method
F.1 General
F.2 Measurements made
F.3 Connector resistance factor k
40 F.4 Initial scatter δ
F.5 Mean scatter β
41 Figure F.1 – Graphic example of assessment of a Class A individual connector
42 F.6 Change in resistance factor of each connector
F.6.1 General
F.6.2 Line of best fit
F.6.3 Confidence interval δi
43 F.6.4 Change in resistance factor D
F.7 Resistance factor ratio λ
F.8 Maximum temperatures θmax
44 Annex G (informative) Explanation on assessment of results of electrical tests on connectors
G.1 History
G.2 Short examination of the assessment methods of IEC 61238-1 compared with the Italian standard CEI 20-28 and the British standard BS 4579-3
45 G.3 The IEC 61238-1 method of assessing test results
Table G.1 – Summary of assessed behaviour of a tested connector
47 Annex H (informative) Electrical tests on cable terminal lugs for application in separable connectors
H.1 Principle
H.2 Lengths
H.3 Temperature measurement
48 H.4 Median connector
H.5 Electrical test parameters
Figure H.1 – Test arrangement
49 Bibliography

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BS EN IEC 61238-1-3:2019+A11:2019
$189.07