Porcelain Post Insulator

The Porcelain Post Insulator 57-22 is an ANSI C29.7 compliant line post designed for 35 kV overhead distribution systems. Its rated voltage is 35 kV. The structure height is 300 mm, and the disc diameter is 140 mm. The mechanical failing load reaches 12.5 kN. The creepage distance is 559 mm, and the dry arcing distance is 241 mm.

The 57-22 model belongs to the ANSI 57 series and provides insulation performance suitable for 35 kV line applications. Compared with lower voltage models, the taller structure increases insulation distance and provides more installation flexibility.

The insulator body is manufactured from electrical porcelain with controlled forming and firing processes. The dense porcelain structure provides stable mechanical strength and electrical insulation performance during outdoor operation. The glazed surface helps improve resistance to moisture and environmental exposure.

This Porcelain Post Insulator is suitable for 35 kV overhead distribution lines, including straight poles, vertical mounting structures, and cross-arm installations.

Our production process follows ANSI C29.7 requirements. The factory controls key steps including raw material preparation, forming, high-temperature firing, glazing, and final inspection.

The quality team checks important dimensions such as structure height, creepage distance, and mounting interface size. Mechanical bending tests and electrical performance inspections are carried out according to product requirements.

We maintain production records for raw material batches and firing processes. These records support product traceability and quality evaluation during project approval.

The mounting dimensions are designed to match common ANSI installation structures. Customized options, including marking and glaze color selection, are available according to project requirements.

We can provide product drawings, inspection documents, and technical information to support installation and maintenance planning.

The standard delivery period is 25 to 35 days. Production schedules can be arranged according to order quantity and project requirements.

Products are packed with reinforced cartons and wooden pallets. Internal protection materials help reduce impact and surface damage during transportation.

We support FOB and CIF trade terms. Export documents, including packing lists and product inspection records, can be prepared according to shipment requirements.

The warranty period is 12 months after shipment. Our technical team can provide installation guidance and product information when needed.

The Porcelain Post Insulator 57-22 provides ANSI standard compatibility, stable porcelain performance, and practical installation support for 35 kV overhead distribution projects.

All products support custom dimensions, voltage ratings, OEM/ODM services, and manufacturing based on drawings.