Insulation of antennas Insulator (electricity)

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egg shaped strain insulator


often broadcasting radio antenna built mast radiator, means entire mast structure energised high voltage , must insulated ground. steatite mountings used. have withstand not voltage of mast radiator ground, can reach values 400 kv @ antennas, weight of mast construction , dynamic forces. arcing horns , lightning arresters necessary because lightning strikes mast common.


guy wires supporting antenna masts have strain insulators inserted in cable run, keep high voltages on antenna short circuiting ground or creating shock hazard. guy cables have several insulators, placed break cable lengths unwanted electrical resonances in guy. these insulators ceramic , cylindrical or egg-shaped (see picture). construction has advantage ceramic under compression rather tension, can withstand greater load, , if insulator breaks, cable ends still linked.


these insulators have equipped overvoltage protection equipment. dimensions of guy insulation, static charges on guys have considered. @ high masts these can higher voltage caused transmitter, requiring guys divided insulators in multiple sections on highest masts. in case, guys grounded @ anchor basements via coil - or if possible, directly - better choice.


feedlines attaching antennas radio equipment, particularly twin lead type, must kept @ distance metal structures. insulated supports used purpose called standoff insulators.







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