dash and dash are used for electrical transmission lines, please tell the answer
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The most common conductor in use for transmission today is aluminum conductor steel reinforced (ACSR). Also seeing much use is all-aluminum-alloy conductor (AAAC). Aluminum is used because it has about half the weight and lower cost of a comparable resistance copper cable
Pin-type insulators
A single-pin insulator is deployed to transmit voltages up to 11 kV but higher voltages require two-, three- or four-piece pin insulators. Pin-type insulators are secured with steel or lead bolts onto transmission poles and generally used for straight-running transmission lines.
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