1 Scope
Part 2 of EN 50382 specifies requirements for, and constructions and dimensions of, single core cables
of the following types and voltage ratings:
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– 1,8/3 kV unscreened, unsheathed with or without textile braid (1,5 mm² to 400 mm²);
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– 1,8/3 kV unscreened, sheathed (1,5 mm² to 400 mm²);
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– 3,6/6 kV unscreened, unsheathed with or without textile braid (2,5 mm² to 400 mm²);
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– 3,6/6 kV unscreened, sheathed (2,5 mm² to 400 mm²).
All cables have class 5 or class 6 tinned or plain copper conductors to EN 60228, halogen-free insulation and where applicable halogen-free sheath. They are for use
in railway rolling stock as fixed wiring, or wiring where limited flexing in operation
is encountered. The requirements provide for a continuous conductor temperature not
exceeding 120 °C or 150 °C and a maximum temperature for short circuit conditions
of either 250 °C or 350 °C based on a duration of 5 s. When the insulating compounds
and sheath specified in this standard which are thermally capable of operating at
150 °C are used with tinned conductors, the maximum operating temperature is limited
to 120 °C and, for the same technical reason, the maximum short circuit temperature
is limited to 250 °C. The choice of sheath may also limit the maximum operating temperature
to 120 °C.
The temperature limit for maximum operating of 120 °C for tinned conductors may be
increased to 150 °C by agreement between the purchaser and the manufacturer.
A textile braid may be included in the insulation or applied at its surface to unsheathed
cables.
Under fire conditions the cables exhibit special performance characteristics in respect
of maximum permissible flame propagation (flame spread) and maximum permissible emission
of smoke and toxic gases.
This Part 2 of EN 50382 should be used in conjunction with Part 1 “General requirements”.