Ceramic Cross Arm Insulators S-380, S-380Z, SC-380

The insulators are made by bonding ceramic components with upper and lower metal attachments using adhesive. The contact areas between the ceramic components and metal attachments are padded with elastic washers. The bonding sections of the ceramic components feature structures such as sandblasting, knurling, and grooving for mechanical strength, anti-loosening, and anti-torsion. The ceramic surfaces are uniformly glazed white, and the metal attachments are coated with gray magnetic paint. The main structures of the ceramic components consist of hollow partition (penetrable) and solid (non-penetrable) structures. The bonded pillar insulators are generally of the solid non-penetrable structure, which reduces maintenance and testing work compared to the previous structure. The ceramic components have either multi-angled or less-angled shapes, with the multi-angled shapes increasing the surface distance and having better electrical properties. All products except for the gradually phased-out external bonded pillar insulators are multi-angled. The internal bonding structure, due to the metal attachments being glued into the ceramic holes, increases the insulation distance and improves electrical performance, while also reducing the space required for installation. However, as internal bonding is not beneficial for enhancing mechanical strength, insulators with higher mechanical strength requirements should use the bonded assembly method (i.e., the upper attachments use internal bonding, and the lower attachments use external bonding).