BS EN 15220-1:2008 pdf download

BS EN 15220-1:2008 pdf download.Railway applications——Brake indicators Part 1: Pneumatically operated brake indicators.

4.2 OperatIng conditions
The brake indicator shall be able to function:
4.2.1 When the upper pressure limit 04 the compressed air used is 10 bar. It shall be able to withstand a hydraulic test with a pressure ol 15 bar ii accordance with 5.3.3.
4.2.2 Where the quality of the compressed air is at least class 4-4-4 according to ISO 8573-1. This requirement Is verified wtten tests are carried out in accordance with
4.2.3 In the temperature range for the environmental conditions to which the railway vehicle is submitted during its operation. The purchaser can specify a higher temperature value if operational constraints demand It. This requirement is tested in accordance with and
4.2.4 To withstand the external ingress of dust and water as specified in EN 60529 (code IP 55). These requirements are tested in accordance with 5.3,4.
NOTE It can be necessary to use protection class IP 65 for idlcators fitted with elec(ncal ccnonents.
4.2.5 To withstand the external corrosion due to normal atmospl’ienc pollutants as specified in EN 50125-1, the brake indicator shall be tested in accordance with the test shown in 5.3.12.
4.2.6 The brake indicator shall be able to function in the vibration environment, as described in EN 61373, of the railway vehicle on which it is mounted.
4.2.7 The brake indicator shall be able to withstand shocks and shall be tested in accordance with 5.3.10.
4.3 Functional characteristics
4.3.1 General
The following requirements are deflned to ensure that no malfunction of the brake indicator occurs:
4.3.2 Braking/release status
The operating conditions of the braking/release flag and its change in status is defined and shall be tested in accordance with 5.3.8.
4.3.3 LubricatIon
It shall be possible to operate the brake Indicator at all presses without additional lubncation.
4.3.4 Leakage
The sealing arrangernent within the brake indicator shall prevent any unacceptable loss of air. The allowable loss 01 air shall be less than the leakage values when tested in accordance with