Disc Suspension Insulator Size Variation Explained

Size Deviation Guidelines for Disc Suspension Insulators

Understanding the allowable size deviations in disc suspension insulators is crucial for maintaining high manufacturing standards. Below are the specific deviation parameters to be adhered to during the insulator manufacturing process:

1. Structural Height Deviation

The structural height deviation is formulated as ±(0.03d + 0.3)mm. For instance, for a U70BS glass insulator with a structural height of 146mm, the deviation is calculated as 146mm ± 4.68mm.

2. Disc Diameter Deviation

• For diameters ≤ 300mm: ±(0.04d + 1.5)mm.
• For diameters > 300mm: ±(0.025d + 6)mm.

An example for U70BS glass insulators: with a disc diameter of 255mm, the deviation is 255mm ± 11.7mm.

3. Creepage Distance Deviation

The deviation is set at ±(0.04d + 1.5)mm. Notably, the average creepage distance must not fall below the nominal creepage distance. For a disc diameter of 320mm, the deviation would be 320mm ± 14.3mm.

4. Offset Criteria

• Axial offset: not exceeding 0.04D mm.
• Radial offset: not exceeding 0.03D mm.

For a U70BS glass insulator with a disc diameter of 320mm, the axial offset is capped at 10.2mm and the radial offset at 7.65mm.

5. Structural Height Deviation for 6 Pieces/String

The allowable height deviation for a 6-piece string structure is ± 19mm. For example, if the height of a U70BS glass insulator is 876mm, the deviation would be 876mm ± 19mm.

Ground Wire Insulator Dimension Deviations

For ground wire insulators, dimension deviations must meet the following standards:

• Structural height deviation: ±(0.03d + 0.3)mm.
• Disc diameter deviation varies by size: ±(0.04d + 1.5)mm for d ≤ 300mm and ±(0.025d + 6)mm for d > 300mm.
• Nominal creepage distance deviation: ±(0.04d + 1.5)mm.

Notably, the 120kN ground wire insulator must be compatible with connecting fittings and comply with GB/T 2315 standards.

Quality Management and Manufacturing at Jiangxi Huayao Electric Co., Ltd.

Jiangxi Huayao Electric Co., Ltd. adheres to the highest industry standards including GB, ANSI, BS, DIN, AS, and IEC. The company exemplifies professionalism and precision in quality management, from raw material selection to the final quality inspection and packaging. The systematic processes ensure excellence in power transmission line and substation applications.