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BS EN 50306-1:2020

BS EN 50306-1:2020

$102.76

Railway applications. Railway rolling stock cables having special fire performance. Thin wall – General requirements

Published By Publication Date Number of Pages
BSI 2020 20
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EN 50306-1 specifies the general requirements applicable to the cables given in EN 50306-2, EN 50306-3 and EN 50306-4. It includes the detailed requirements for S2 sheathing materials and other components called up in the separate parts.

NOTE Detailed requirements for insulation systems are given in EN 50306-2.

In particular, EN 50306-1 specifies those requirements relating to fire safety which enable the cables to satisfy Hazard Level 3 of EN 45545-1 and EN 45545-2.

These cables are rated for occasional thermal stresses which causes ageing equivalent to continuous operational life at a temperature of 105 °C or 90 °C. For standard cables, this is determined by the acceptance test defined in EN 50305, using accelerated long-term (5 000 h) thermal ageing indicating a 125 °C or 110 °C /20 000 h temperature index. If the customer were to require lifetime predictions, this would be demonstrated based on the temperature index of the product as supplied by the manufacturer. The maximum temperature for short circuit conditions is 160 °C based on duration of 5 s.

EN 50306-1 is expected to be used in conjunction with one or more of the other parts of EN 50306.

PDF Catalog

PDF Pages PDF Title
2 undefined
8 1 Scope
2 Normative references
9 3 Terms and definitions
10 4 Rated voltage
11 5 Marking
5.1 Indication of origin
5.2 Continuity of marks
5.3 Durability
5.4 Legibility
12 5.5 Additional marking
5.6 Use of the name CENELEC
6 General requirements for the construction of cables
6.1 Conductors
6.1.1 Material
6.1.2 Construction
6.1.3 Check of construction
6.1.4 Electrical resistance
6.2 Insulation system
6.2.1 Material
6.2.2 Application
6.2.3 Thickness and concentricity
13 6.3 Fillers and tapes
6.3.1 Material
6.3.2 Application
6.4 Inner sheath
6.4.1 Material
6.4.2 Application
6.4.3 Thickness
6.5 Metallic screen
6.5.1 Type of screen
6.5.2 Application
6.6 Sheath
6.6.1 Material
14 6.6.2 Application
6.6.3 Thickness
6.7 Overall diameter
7 Electrical performance
8 Fire performance – cables
8.1 Flame propagation (flame spread) – single vertical cable
8.2 Flame propagation (flame spread) – bunched cables
8.2.1 Cables with diameter more than or equal to 12 mm
8.2.2 Cables with diameter greater than 6 mm and less than 12 mm
15 8.2.3 Cables with diameter not greater than 6 mm
8.3 Smoke emission
9 Fire performance – components
9.1 Tests for corrosive and acid gas emission, and for fluorine
9.2 Toxicity
17 Annex A (normative)Thickness and overall diameterSelection of samples and calculation of results
A.1 Insulation thickness
A.1.1 Procedure
A.1.2 Evaluation of results
A.1.3 Concentricity
A.2 Measurement of sheath thickness
A.2.1 Procedure
A.2.2 Evaluation of results
A.3 Measurement of overall diameter

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BS EN 50306-1:2020
$102.76