FIELD: electric transport facilities; insert for trolleybus current collectors. SUBSTANCE: contact insert is made from non-ferrous alloy of the following composition: aluminium, 9.0 to 48.0 % (mass fraction); copper, 1.0 to 5.5% (mass fraction); magnesium, up to 0.1% (mass fraction) and zinc remainder. EFFECT: increased service life with no increased wear of contact system.
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