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BS EN 3475-512:2021 pdf free

BS EN 3475-512:2021 pdf free.Aerospace series一Cables, electrical, aircraft use – Test methods Part 512: Flexure endurance.
The following documents are referred to in the text in such a way that some or all of their content constitutes requirements of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies.
EN 3475-100, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 100: General
EN 3475-302, Aerospace series — Cables, electrical, aircraft use — Test methods — Part 302: Voltage proof test
3 Terms and definitions
No terms and definitions are listed in this document.
ISO and IEC maintain terminological databases for use in standardization at the following addresses:
• ISO Online browsing platform: available at http://www.iso.org/obp
• IEC Electropedia: available at http://www.electropedia.org/
4 Preparation of specimens and principle of test
Take specimens of adequate length from a finished cable and install them on apparatus described hereafter.
This test makes it possible to determine the resistance of the cable to cycles of repeated flexing. With the cable vertical, a cycle is defined by a rotation of 90° left, return to the vertical, rotation of 90° right and return to the vertical.
The damage is detected by conductor breakage and thus an interruption of electrical continuity between the two ends of the tested specimen.
The test is normally performed on gauge 20 cables.
It is carried out at ambient temperature.
5 Apparatus and installation of specimens
The apparatus is described by Figure 1.
It is fitted with a counter and an automatic stop device controlled by interruption of electrical continuity.
The rotation speed shall be a uniform rate of(18 ± 2) cycles/mm.
The space between mandrels is equal to the maximum diameter of the tested cable.
The mandrel diameter D and weight M are specified in the product standard.
The test setup shall be designed to avoid any swing motion/displacement of the cable between the mandrels.
The length should be sufficient to ensure that the weight shall not influence the bending motion.BS EN 3475-512 pdf download.

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