Harting Sbírka katalogů říjen 2013

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Vydal: HARTING s.r.o. Autor: HARTING

Strana 181 z 808

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Insert 175 4. The contact material must fulfil wide range requirements. Contact pressure plays immeasurably important role determining the useful life and handling properties contacts. Over a long period time, corrosion makes contacts unusable. the case multicontact connectors, the force required connect and disconnect them can become great that it can longer done hand. The following are proven techniques for the surface finishing industrial connectors. Some these requirements are follows: - the material should conduct electrical current well - should mechanically strong (abrasion-proof) - should have good elastic properties (female contact) - manufacturers should able process easily (manufacturing) - electricians should able form easily (for example crimping) - the material should resistant environmental influences A suitable brass alloy fulfils most these requirements quite well. . Its value depends on various factors: - smoothness surface - sufficient contact pressure - point contact free interfering oxidized layers As far contact surface concerned, balance must found between function and economic considerations (manufacturing costs).7 Contact Finish Nearly all contacts for industrial connectors are made copper alloys (brass). Additional surface treatment required protect them against environmental influences.) - frequency insertion - low manufacturing costs Why surface protection important? constant low contact resistance is fundamental maintaining the quality the contact. The following points are decisive the selection surface finish: - properties the contact material - environmental conditions (for example dampness, aggressive industrial environments, etc