STANDARD LOW VOLTAGE BUSHING ASSEMBLIES 1.2 KV CLASS, 30 KV BIL EXTERNALLY CLAMPED TYPE

Technical Specification

Product: Low Voltage Bushing Assembly
Application: Liquid-Filled Transformer

1. Operating Conditions

• Electrical ratings are based on use in liquid-filled transformers, with the lower end of the bushing submerged below the oil level during operation.
• Designed for stable electrical and mechanical performance in standard transformer service environments.

2. Construction and Materials

• Insulating Body: Manufactured from premium electrical-grade wet-process porcelain for excellent dielectric strength and long-term durability.
• Finish: Standard gray glaze, unless otherwise specified.
• Mounting Hole Diameter: 3.94 in (100 mm) minimum.
• Anti-Rotation Design:
  • The bushing is keyed to a two-piece clamp.
  • The connector is keyed to the porcelain insulator, preventing rotation during installation and operation.

3. Gaskets

• Standard Gasket Material: Nitrile (Buna-N).
• Optional Gasket Material: Cork and rubber composite.
  • To specify this option, add suffix “C” to the part number when ordering.

4. Terminal (Spade) Assembly

• Standard Material: 95% minimum conductivity copper.
• Finish: Tin plated to ensure optimal corrosion resistance and electrical performance.
• Optional Materials: Lower-conductive copper alloys (such as brass or bronze) available upon request at discounted pricing.

5. Design Features

• Designed for externally clamped transformer mounting configurations.
• Provides mechanical stability, precise alignment, and resistance to rotation during operation.
• Ensures long-term electrical reliability in oil-immersed applications.