BS EN IEC 61238-1-2:2019
$198.66
Compression and mechanical connectors for power cables – Test methods and requirements for insulation piercing connectors for power cables for rated voltages up to 1 kV (Um = 1,2 kV) tested on insulated conductors
| Published By | Publication Date | Number of Pages |
| BSI | 2019 | 62 |
This part of IEC 61238 applies to insulation piercing connectors for power cables for rated voltages up to 1 kV (Um = 1,2 kV), for example according to IEC 60502-1 or other buried cables and cables installed in buildings, having
-
conductors complying with IEC 60228 having nominal cross-sectional areas between 2,5 mm2 and 300 mm2 for copper and between 16 mm2 and 500 mm2 for aluminium,
-
a maximum continuous cable temperature not exceeding the insulation material properties.
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 insulation piercing connectors for power cables with copper or aluminium conductors. The reference method is to perform the tests on unused insulated conductors.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 7 | English 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 Cable |
| 17 | 5.3 Connectors and installation procedure 5.4 Range of approval |
| 18 | 6 Electrical tests 6.1 Installation 6.1.1 General 6.1.2 Through connectors |
| 19 | 6.1.3 Branch connectors 6.2 Measurements 6.2.1 General 6.2.2 Electrical resistance measurements |
| 20 | 6.2.3 Temperature measurements Figures FigureĀ 1 ā Position of thermocouples |
| 21 | 6.3 Heat cycling test 6.3.1 General 6.3.2 First heat cycle 6.3.3 Second heat cycle Tables TableĀ 1 ā Minimum period of temperature stability |
| 22 | FigureĀ 2 ā Example of second heat cycle profile |
| 23 | 6.3.4 Subsequent heat cycles 6.4 Short-circuit test for connectors according to Class A TableĀ 2 ā Electrical resistance measurements during the electrical test |
| 24 | 6.5 Assessment of results 6.6 Requirements |
| 25 | 6.7 Examples of electrical test loop configurations and associated parameters TableĀ 3 ā Electrical test requirements |
| 26 | FigureĀ 3 ā Typical electrical test loop for throughconnectors installed on insulated conductors |
| 27 | FigureĀ 4 ā Typical electrical test loop for branchconnectors installed on insulated conductors |
| 28 | FigureĀ 5 ā Typical cases of resistance measurements |
| 29 | 7 Mechanical test 7.1 General 7.2 Method 7.3 Requirements 8 Test reports 8.1 General 8.2 Electrical tests TableĀ 4 ā Selection of tensile force withstand values for the mechanical test |
| 30 | 8.3 Mechanical test |
| 31 | AnnexĀ A (normative)Equalizers and their preparation A.1 Requirements for equalizers A.2 Recommendations for welding equalizers |
| 32 | FigureĀ A.1 ā Preparation of equalizers |
| 33 | AnnexĀ B (normative)Measurements B.1 Potential measuring positions for typical connectors B.2 Temperature measurement B.3 Equivalent conductor resistance |
| 34 | AnnexĀ C (informative)Recommendations to decrease uncertainties of measurement C.1 Handling the test loop C.2 Measurements, instruments and readings |
| 35 | AnnexĀ D (normative)Calculation of adiabatic short-circuit current TableĀ D.1 ā Material properties |
| 36 | AnnexĀ E (informative)Determination of the value of the short-circuit current FigureĀ E.1 ā Determination of equivalent RMS valueof current during the short-circuit test |
| 37 | AnnexĀ F (normative)Calculation method F.1 General F.2 Measurements made F.3 Connector resistance factor k |
| 38 | F.4 Initial scatter Ī“ F.5 Mean scatter Ī² |
| 39 | FigureĀ F.1 ā Graphic example of assessment of a Class A individual connector |
| 40 | 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 Ī“i |
| 41 | F.6.4 Change in resistance factor D F.7 Resistance factor ratio Ī» F.8 Maximum temperatures Īømax |
| 42 | AnnexĀ G (informative)Explanation on assessment of results of electrical tests on connectors G.1 History G.2 Short examination of the assessment methods of IECĀ 61238-1 compared with the Italian standard CEIĀ 20-28 and the British standard BSĀ 4579-3 |
| 43 | G.3 The IECĀ 61238-1 method of assessing test results |
| 44 | TableĀ G.1 ā Summary of assessed behaviour of a tested connector |
| 45 | AnnexĀ H (informative)Tests on multicore connectors H.1 Principle H.1.1 Electrical tests H.1.2 Mechanical tests H.2 Test recommendations for electrical tests based on test experience in the UK and in France H.2.1 General |
| 46 | H.2.2 Measurement H.2.3 Heat cycling test H.2.4 Short-circuit test (only for Class A) |
| 47 | H.2.5 Results evaluation FigureĀ H.1 ā Test loops for through connectors |
| 48 | H.3 Test recommendations for electrical tests based on German standard DINĀ VDEĀ 0220-Ā 3 H.3.1 General FigureĀ H.2 ā Test loops for branch connectors |
| 49 | H.3.2 Test setup for electrical test |
| 50 | H.3.3 Resistance assessment branches of the test setup H.3.4 Temperature measurement in a separate test branch during the first and second heat-cycle FigureĀ H.3 ā Example of test setup for multicore branch connectorson a four-core cable consisting of several test branches |
| 52 | H.3.5 Interconnection of terminals for heat-cycling |
| 53 | FigureĀ H.4 ā Example of circuit schematic for heat-cycling of multicorebranch connectors main to branch, e.g. 150/150, 150/120 or 150/95in the case of four-core cables |
| 54 | H.3.6 Short-circuit tests FigureĀ H.5 ā Example of circuit schematic for heat-cycling of multicore branch connectors main to branch, e.g. 150/70 and smaller in the case of four-core cables |
| 55 | FigureĀ H.6 ā Example of circuit schematic in the case of four-corecable connector tests for passing short circuits on main through adjacentPhasesĀ L2āL3 with opposite current flow |
| 56 | FigureĀ H.7 ā Example of circuit schematic in the case of four-core cablebranch connector tests for short circuit test from main to branchthrough adjacent PhasesĀ L4āL1 with opposite current flow |
| 57 | H.3.7 Assessment of resistance-values Rj |
| 58 | H.3.8 Optional dielectric strength test after the electrical test |
| 59 | AnnexĀ I (informative)Load pick-up tests TableĀ I.1 ā Minimum load pick-up |
| 60 | Bibliography |
Related products
-
BS EN IEC 61238-1-2:2019
Compression and mechanical connectors for power cables – Test methods and requirements for insulation piercingā¦
