BS EN IEC 61238-1-1:2019
$189.07
Compression and mechanical connectors for power cables – Test methods and requirements for compression and mechanical connectors for power cables for rated voltages up to 1 kV (Um = 1,2 kV) tested on non-insulated conductors
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 48 |
This part of IEC 61238 applies to compression and mechanical connectors for power cables for rated voltages up to 1 kV (Um = 1,2 kV), for example buried cables or cables installed in buildings, having
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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;
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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 | National foreword |
| 7 | English CONTENTS |
| 9 | FOREWORD |
| 11 | INTRODUCTION |
| 12 | 1 Scope 2 Normative references 3 Terms and definitions |
| 14 | 4 Symbols |
| 15 | 5 General 5.1 Definition of classes |
| 16 | 5.2 Conductor 5.3 Connectors and installation procedure 5.4 Range of approval |
| 17 | 6 Electrical tests 6.1 Installation 6.1.1 General |
| 18 | 6.1.2 Through connectors and terminations 6.1.3 Branch connectors 6.2 Measurements 6.2.1 General |
| 19 | 6.2.2 Electrical resistance measurements 6.2.3 Temperature measurements 6.3 Heat cycling test 6.3.1 General |
| 20 | 6.3.2 First heat cycle 6.3.3 Second heat cycle Tables Table 1 – Minimum period of temperature stability |
| 22 | 6.3.4 Subsequent heat cycles 6.4 Short-circuit test for connectors according to Class A 6.4.1 General Figures Figure 1 – Example of second heat cycle profile Table 2 – Electrical resistance measurements during the electrical test |
| 23 | 6.4.2 Aluminium conductors with cross-sectional areas below 1 000 mm2 and copper conductors with cross-sectional areas below 630 mm2 6.4.3 Aluminium conductors with cross-sectional areas ≥ 1 000 mm2 and copper conductors with cross-sectional areas ≥ 630 mm2 |
| 24 | 6.5 Assessment of results 6.6 Requirements 6.7 Examples of electrical test loop configurations and associated parameters Table 3 – Electrical test requirements |
| 26 | Figure 2 – Typical electrical test loops for through connectors and terminal lugs |
| 27 | Figure 3 – Typical electrical test loop for branch connectors |
| 29 | Figure 4 – Typical cases of resistance measurements |
| 30 | 7 Mechanical test 7.1 General 7.2 Method 7.3 Requirements Table 4 – Selection of tensile force withstand values for the mechanical test |
| 31 | 8 Test reports 8.1 General 8.2 Electrical tests 8.3 Mechanical test |
| 32 | Annex A (normative)Equalizers and their preparation A.1 Requirements for equalizers A.2 Recommendations for welding equalizers |
| 33 | Figure A.1 – Preparation of equalizers |
| 34 | Annex B (normative)Measurements B.1 Potential measuring positions for typical connectors B.2 Temperature measurement B.3 Equivalent conductor resistance |
| 35 | Annex C (informative)Recommendations to decrease uncertainties of measurement C.1 Handling the test loop C.2 Measurements, instruments and readings |
| 36 | Annex D (normative)Calculation of adiabatic short-circuit current Table D.1 – Material properties |
| 37 | 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 |
| 38 | Annex F (normative)Calculation method F.1 General F.2 Measurements made F.3 Connector resistance factor k |
| 39 | F.4 Initial scatter δ F.5 Mean scatter β |
| 40 | Figure F.1 – Graphic example of assessment of a Class A individual connector |
| 41 | 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 |
| 42 | F.6.4 Change in resistance factor D F.7 Resistance factor ratio λ F.8 Maximum temperatures θmax |
| 43 | 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 |
| 44 | G.3 The IEC 61238-1 method of assessing test results |
| 45 | Table G.1 – Summary of assessed behaviour of a tested connector |
| 46 | Bibliography |
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