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eLibrary > BS EN IEC 61238-1-2:2019 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 (U_m = 1,2 kV) tested on insulated conductor >

BS EN IEC 61238-1-2:2019 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 (U_m = 1,2 kV) tested on insulated conductor, 2019

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BS EN IEC 61238-1-2:2019 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 (U_m = 1,2 kV) tested on insulated conductor, 2019

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English [Go to Page]
CONTENTS
FOREWORD
INTRODUCTION
1 Scope
2 Normative references
3 Terms and definitions
4 Symbols
5 General [Go to Page]
5.1 Definition of classes
5.2 Cable
5.3 Connectors and installation procedure
5.4 Range of approval
6 Electrical tests [Go to Page]
6.1 Installation [Go to Page]
6.1.1 General
6.1.2 Through connectors
6.1.3 Branch connectors
6.2 Measurements [Go to Page]
6.2.1 General
6.2.2 Electrical resistance measurements
6.2.3 Temperature measurements
Figures [Go to Page]
Figure 1 – Position of thermocouples
6.3 Heat cycling test [Go to Page]
6.3.1 General
6.3.2 First heat cycle
6.3.3 Second heat cycle
Tables [Go to Page]
Table 1 – Minimum period of temperature stability
Figure 2 – Example of second heat cycle profile [Go to Page]
6.3.4 Subsequent heat cycles
6.4 Short-circuit test for connectors according to Class A
Table 2 – Electrical resistance measurements during the electrical test
6.5 Assessment of results
6.6 Requirements
6.7 Examples of electrical test loop configurations and associated parameters
Table 3 – Electrical test requirements
Figure 3 – Typical electrical test loop for throughconnectors installed on insulated conductors
Figure 4 – Typical electrical test loop for branchconnectors installed on insulated conductors
Figure 5 – Typical cases of resistance measurements
7 Mechanical test [Go to Page]
7.1 General
7.2 Method
7.3 Requirements
8 Test reports [Go to Page]
8.1 General
8.2 Electrical tests
Table 4 – Selection of tensile force withstand values for the mechanical test
8.3 Mechanical test
Annex A (normative)Equalizers and their preparation [Go to Page]
A.1 Requirements for equalizers
A.2 Recommendations for welding equalizers
Figure A.1 – Preparation of equalizers
Annex B (normative)Measurements [Go to Page]
B.1 Potential measuring positions for typical connectors
B.2 Temperature measurement
B.3 Equivalent conductor resistance
Annex C (informative)Recommendations to decrease uncertainties of measurement [Go to Page]
C.1 Handling the test loop
C.2 Measurements, instruments and readings
Annex D (normative)Calculation of adiabatic short-circuit current [Go to Page]
Table D.1 – Material properties
Annex E (informative)Determination of the value of the short-circuit current [Go to Page]
Figure E.1 – Determination of equivalent RMS valueof current during the short-circuit test
Annex F (normative)Calculation method [Go to Page]
F.1 General
F.2 Measurements made
F.3 Connector resistance factor k
F.4 Initial scatter δ
F.5 Mean scatter β
Figure F.1 – Graphic example of assessment of a Class A individual connector
F.6 Change in resistance factor of each connector [Go to Page]
F.6.1 General
F.6.2 Line of best fit
F.6.3 Confidence interval δi
F.6.4 Change in resistance factor D
F.7 Resistance factor ratio λ
F.8 Maximum temperatures θmax
Annex G (informative)Explanation on assessment of results of electrical tests on connectors [Go to Page]
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
G.3 The IEC 61238-1 method of assessing test results
Table G.1 – Summary of assessed behaviour of a tested connector
Annex H (informative)Tests on multicore connectors [Go to Page]
H.1 Principle [Go to Page]
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 [Go to Page]
H.2.1 General
H.2.2 Measurement
H.2.3 Heat cycling test
H.2.4 Short-circuit test (only for Class A)
H.2.5 Results evaluation
Figure H.1 – Test loops for through connectors
H.3 Test recommendations for electrical tests based on German standard DIN VDE 0220- 3 [Go to Page]
H.3.1 General
Figure H.2 – Test loops for branch connectors [Go to Page]
H.3.2 Test setup for electrical test
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
Figure H.3 – Example of test setup for multicore branch connectorson a four-core cable consisting of several test branches [Go to Page]
H.3.5 Interconnection of terminals for heat-cycling
Figure H.4 – 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 [Go to Page]
H.3.6 Short-circuit tests
Figure H.5 – 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
Figure H.6 – Example of circuit schematic in the case of four-corecable connector tests for passing short circuits on main through adjacentPhases L2–L3 with opposite current flow
Figure H.7 – Example of circuit schematic in the case of four-core cablebranch connector tests for short circuit test from main to branchthrough adjacent Phases L4–L1 with opposite current flow [Go to Page]
H.3.7 Assessment of resistance-values Rj
H.3.8 Optional dielectric strength test after the electrical test
Annex I (informative)Load pick-up tests [Go to Page]
Table I.1 – Minimum load pick-up
Bibliography [Go to Page]

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BS EN IEC 61238-1-2:2019 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 conductor, 2019

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BS EN IEC 61238-1-2:2019 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 (U_m = 1,2 kV) tested on insulated conductor, 2019