BS EN 50702:2021 pdf free download – Railway applications一Rolling stock一 Conductor rail current collectors (shoegear): Characteristics and tests.
7.3.2 Checking of the operating system of the current collector (if applicable)
The current collector shall be coupled to the whole operating system. The test shall be carried out at ambient temperature and at rated air supply pressure or rated voltage in the case of electrical operating system.
Test acceptance criteria:
a) The movement from the retracted position to the upper stop shall be achieved in a time of less than 2 s from the moment the current collector starts to move.
b) The movement from the upper stop to the retracted position shall be achieved in a time of less than 2 s from the moment the current collector starts to move.
7.3.3 Operating climatic test
The tests as ciescnbed in 7.3.2 shaU be carried out at the extremes of temperature and humidity specified in the customer specification. If the values are not specified, the tests shall be carried out at —25 °C and +40 °C. ambient humidity (if not otherwise specified by the customer). The above tests, at the extremes of temperature shall also be carried out at the minimum and maximum values of air pressure or voltage specified in the customer specification.
Test acceptance criteria:
a) During arid after the tests, the current collector shall operate satisfactorily in accordance with the acceptance criteria given in 7.3.2.
7.3.4 CombIned operating climatic test at vehicle
The tests as described in 7.3.3 shall be carried out at a current collector mounted to a vehicle while tested in a climate chamber. The vehicle manufacturer is responsible for the test, the current collector supplier shall support.
Test acceptance criteria:
a) During and after the tests, the current collector shall operate satisfactorily in accordance with the acceptance criteria given in 7.3.2.
7.4 Endurance tests
7.4.1 Operation between retracted position and working position
The current collector is fitted with the collector shoe with the largest mass for which it is designed and is submitted to 10 000 consecutive raising and lowering operations from the working position to the retracted position (if a locking device has been fitted for the retracted position, it shall be disconnected).
Test acceptance criteria:
a) There shall be no abnormal wear. The current collector shall meet the requirements of 7.3.1 and 7.3.2.
b) There shall be no distortions or fractures.
7.4.2 Operation within working range
The current collector with a collector shoe in the same conditions as described in 7.4.1 shall be submitted to 5 000 000 cycles raising and lowering consecutive operations within the working range. The working range is from the normal position (off rail) to the maximum working position (on rail). The maximum working position shall include the dynamic movement of the bogie if applicable, and the tolerance of the position of the conductor rail. The test shall be carried out at a minimum frequency of 1 Hz. The test does not serve as a wear test for the collector shoe.