Suspended Porcelain Insulator XP-300

The insulators are made by bonding ceramic parts with upper and lower metal attachments using adhesive. The contact areas between the ceramic parts and metal attachments are padded with elastic washers. The bonding areas of the ceramic parts feature structures such as sandblasting, rolling, and grooving for mechanical strength, anti-loosening, and anti-torsion. The ceramic surfaces are evenly glazed white, and the metal attachments are coated with gray magnetic paint. The main structure of the ceramic insulator bodies has two types: a hollow partition (piercing-type) structure and a solid (non-piercing-type) structure. The bonded pillar insulators are generally of the solid non-piercing type. This structure reduces maintenance and testing work compared to the previous one. The ceramic insulator bodies come in two shapes: multi-angled or less-angled. The multi-angled shape increases the surface distance and has better electrical properties than the less-angled shape. 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, since internal bonding is not beneficial for increasing 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).