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Fostoria Bushings and Insulators

PB-10

POWER BUSHING ASSEMBLIES 23 KV CLASS, 150 KV BIL, 19.5″ CREEP


Technical Specification

1. Application

Designed for use in transformers, switchgear, entrance, and special power apparatus applications.

2. Electrical Ratings

  • Ratings are based on use in a liquid-filled transformer, with the lower end of the bushing submerged below the oil level.

3. Construction

  • Insulator Material: High-quality electrical-grade wet-process porcelain
  • Finish: Gray glaze applied over the entire surface
  • Top Skirts: Designed for outdoor applications
  • Sealing: Bushings are fully oil- and watertight at both the top terminal and the mounting flange

4. Terminal / Spade Assembly

  • Material: Pure copper spade castings, tin-plated
  • Electrical Conductivity: Minimum 97% guaranteed

5. Mechanical Components

  • Flanges and Washers: Made of non-magnetic materials
  • Disc Spring Assembly: Maintains constant gasket pressure at the top terminal, compensating for thermal expansion and contraction of the copper stud

6. Gaskets

Optional Gasket: Cork-rubber composition — to specify, add suffix “C” to the part number when ordering

Standard Gasket: Nitrile (Buna-N)

Diagram of a power bushing assembly with specifications including flange detail, stud sizes, part numbers, and dimensions for various electrical applications.