Top-Clamp Porcelain Pin Insulator

Model 56-3 is installed on a pin or top-clamp position to secure an overhead conductor while providing mechanical support and insulation to ground.
The top-clamp arrangement is relevant where the conductor must remain fixed at the support point rather than being suspended in a string.
The Top-Clamp Porcelain Pin Insulator suits distribution and higher-voltage overhead-line support positions with defined mechanical and electrical requirements.

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Product Specifications

Parameter	Specification
Model	56-3
Creepage Distance	Approx. 333 mm
Minimum Pin Length	Approx. 198 mm
Cantilever Strength	Approx. 13.2 kN
Power-Frequency Flashover (Dry/Wet)	Approx. 125 / 80 kV

Pin and Space Verification

Minimum pin length is approximately 198 mm, making pin size and the actual mounting structure important pre-order checks.

Creepage distance is approximately 333 mm, while cantilever strength is approximately 13.2 kN.

Buyers can use these dimensions and strength values to verify compatibility before confirming a replacement or new line order.

Electrical Reference Values

Power-frequency flashover is approximately 125/80 kV under dry/wet conditions.

Positive/negative impulse flashover is approximately 200/265 kV, and the confirmed power-frequency puncture value is 165 kV.

Individual product weight is 7 kg, providing an additional reference for handling and project documentation.

Production to Drawing

OEM/ODM production can follow line drawings, pin structure, clamp arrangement, or an existing product sample.

Technical confirmation may cover pin length, mounting interface, creepage distance, and mechanical strength to reduce dimensional mismatch at installation.

Porcelain processing, glazing, firing, and later inspection are supported by bending-test, go/no-go gauge, creepage-distance, and electrical inspection equipment.

Shipment Inspection and Coordination

Quality control runs from raw materials through finished-product release, and third-party inspection can be arranged for volume orders.

Export packaging follows destination-country receiving requirements. Standard production is generally 30 days and customized production generally 45 days.

Production status can be shared by photo or video, with EXW, FOB, or DDP delivery terms available.

When sourcing a Top-Clamp Porcelain Pin Insulator, include the actual pin dimensions and clamp arrangement with the inquiry.

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