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BS EN 50305:2020

BS EN 50305:2020

$189.07

Railway applications. Railway rolling stock cables having special fire performance. Test methods

Published By Publication Date Number of Pages
BSI 2020 48
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This document specifies special test methods applicable to cables, and their constituent insulating and sheathing materials, for use in railway rolling stock. Such cables are specified in the various parts of the EN 50264 series, EN 50306 series and EN 50382 series.

Other test methods required for railway rolling stock cables and their insulating and sheathing materials are listed in Annex A.

PDF Catalog

PDF Pages PDF Title
2 undefined
10 1 Scope
2 Normative references
11 3 Terms and definitions
4 Applicability, sampling, test-piece preparation and test conditions
4.1 Applicable tests
4.2 Classification of tests
4.3 Sampling
4.4 Test-piece preparation
4.5 Test conditions
4.5.1 Ambient temperature
4.5.2 Tolerance on temperature values
12 4.5.3 Frequency and waveform of power frequency test voltages
4.5.4 Pre-conditioning
5 Mechanical tests
5.1 Impact test at low temperature
5.2 Abrasion resistance
13 5.3 Notch propagation
14 5.4 Pliability (only applicable for cable in according to EN 50306 series)
15 5.5 Strippability and adhesion of insulation (only applicable for cable in according to EN 50306 series)
5.5.1 Strippability
5.5.2 Adhesion
5.6 Dynamic cut-through (only applicable for cable in according to EN 50306 series)
16 6 Electrical tests
6.1 Electrical resistance of conductors
6.2 Voltage test on completed cable
6.2.1 Cable without metallic layer
6.2.2 Cable with one or more metallic layers
6.3 Voltage test on sheath
17 6.4 Insulation resistance
6.4.1 Test at ambient temperature
6.4.2 Test at elevated temperature
6.5 Spark test
6.5.1 General
6.5.2 Method
6.6 Surface resistance
18 6.7 DC stability
19 6.8 Dielectric strength
7 Ageing and thermal tests
7.1 Compatibility
7.2 Long term ageing
7.2.1 General
7.2.2 Summary of test method
20 7.2.3 Apparatus
7.2.4 Method
7.2.4.1 Test specimens
7.2.4.2 Temperature selection and exposure
7.2.4.3 Wrapping procedure
22 7.2.4.4 Voltage test
7.2.4.5 Continuation of exposure
7.3 Long term ageing for sheath and insulation where winding test is not possible
7.4 Ozone resistance
7.4.1 Electrical test
7.4.2 Non-electrical test
7.4.2.1 Test apparatus and testing devices
7.4.2.2 Selection and cutting of test pieces
23 7.4.2.3 Conditioning and preparation of test pieces
7.4.2.4 Test procedure
24 7.4.2.5 Requirements
7.5 Pressure test at high temperature
7.6 Shrinkage test for insulation
7.7 Stress cracking test
7.7.1 General
7.7.2 Preparation of test assemblies
25 7.7.3 Determination of the 168 h thermal ageing test temperature
26 7.7.4 Test method
8 Tests in fluids, including water
8.1 Mineral and fuel oil resistance
8.2 Acid and alkali resistance
8.3 Water absorption of sheath
27 9 Fire performance tests
9.1 Flame propagation
9.1.1 Cables with overall diameter greater than 6 mm and less than 12 mm
9.1.2 Cables with overall diameter not greater than 6 mm
9.2 Toxicity
9.2.1 General
28 9.2.2 Qualitative analysis for nitrogen and sulfur using molten sodium
9.2.2.1 Preparation of test solution
9.2.2.2 Evaluation
9.2.3 Quantitative analysis
9.2.3.1 General
29 9.2.3.2 Apparatus
30 9.2.3.3 Test specimen and pre-conditioning
9.2.3.4 Combustion procedure
9.2.3.5 Analysis methods
9.2.4 Index calculation
31 10 Miscellaneous tests
10.1 Durability of marking
10.2 Blocking of cores
10.3 Determination of halogen content
32 Annex A (informative)List of other test methods applicable to rolling stock cables
33 Annex B (normative)Procedure for checking the efficacy of the method of spark testing(with reference to 6.5)
B.1 Object
B.2 Procedure
B.2.1 Selection of samples
B.2.2 Preparation of samples
34 B.2.3 Efficiency of Spark test equipment
B.2.4 Method to check the recovery time
35 Annex C (informative)Long term ageing test – Significance and use
36 Annex D (informative)Illustration of an Arrhenius plot
37 Annex E (normative)Analysis methods for toxicity
E.1 Continuous analysis methods
E.1.1 Oxides of carbon
38 E.1.2 Materials containing sulfur – determination of sulfur dioxide
E.1.2.1 General
E.1.2.2 Apparatus
39 E.1.2.3 Reagents
E.1.2.4 Solution of gases
E.1.2.5 Colorimetric titration analysis
40 E.1.3 Materials containing nitrogen
E.1.3.1 General
E.1.3.2 Determination of the hydrogen cyanide
41 E.2 Discontinuous analysis
E.2.1 General
E.2.2 Determination of oxides of carbon using infrared analysers
E.2.3 Determination of sulfur dioxide with a detector tube
42 E.2.4 Determination of nitrogen oxides with a detector tube
E.2.5 Analysis of the hydrogen cyanide
43 Annex F (normative)Halogen-Free
F.1 Requirements for extruded material
F.1.1 General
F.1.2 Type test
F.1.3 Sample test
44 F.2 Requirements for non-extruded materials – Type and sample test
45 Annex G (normative)Determination of halogens – Elemental test
G.1 General
G.2 Equipment
G.3 Materials
G.4 Procedure
G.4.1 Sodium fusion
46 G.4.2 Chlorine and Bromine
G.4.3 Fluorine

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BS EN 50305:2020
$189.07