Development of line post type polymer insulation arm for 154 kV

Based on the results of basic studies on the housings and FRP cores of polymer composite insulators, a line post type polymer insulation arm for 154 kV with a truss structure formed by three polymer insulation arm units; i.e., two horizontal units with an open angle between them and one suspension unit, was experimentally manufactured. Samples of the polymer insulation arm were tested to verify the withstand voltage performance under a polluted conditions, the impulse and power-frequency withstand voltage performance, and the mechanical performance by a full scale test against longitudinal loads.