Pin Type Post Insulator

The Pin Type Post Insulator 55-5 is an ANSI C29.5 compliant insulator designed for 25 kV medium voltage systems. Its rated voltage is 25 kV. The structure height is 152 mm, and the disc diameter is 178 mm. The mechanical failing load is 11 kN. The creepage distance is 305 mm, and the dry arcing distance is 159 mm.

The 55-5 is one of the larger models in the ANSI 55 series. Its 178 mm disc diameter provides a larger insulation surface and better mechanical support compared with lower-size models. The structure is suitable for medium voltage equipment where reliable conductor support is required.

We manufacture this Pin Type Post Insulator with electrical porcelain material. The porcelain body is formed under controlled pressure and fired in automated tunnel kilns. The controlled firing process helps achieve consistent density, mechanical strength, and electrical insulation performance.

This model is commonly installed on substation structures, capacitor banks, and medium voltage overhead line equipment. It can work with standard ANSI mounting hardware for easier installation and replacement.

Our production process follows ANSI C29.5 dimensional and performance requirements. The quality team checks critical dimensions, including structure height, creepage distance, and mounting interface size during production.

Before shipment, each production batch undergoes electrical and mechanical inspections. We perform power frequency withstand tests and mechanical load tests on samples to confirm product performance. Inspection records are maintained for production traceability.

Our engineers can provide technical documents, including dimensional drawings and test reports, to support project approval. We also accept customized marking requirements, such as customer logos and packaging labels.

The standard delivery period is 25 to 35 days after order confirmation. During production, we can provide manufacturing progress updates for project tracking.

Products are packed in export cartons with foam protection and placed on heat-treated wooden pallets. Each package includes clear model information and shipping marks for easy identification.

We support EXW, FOB, and CIF trade terms through Shenzhen and Ningbo ports. Standard payment terms are 30% deposit and 70% balance before shipment. For large-volume projects, we can discuss customized supply plans.

The warranty period is 12 months from the shipment date. Our technical team can provide installation guidance and product support when required.

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