3FL / 3FS / 3FT — composite line and post insulators up to 800 kV
3FL, 3FS and 3FT are composite insulators with a continuous silicone housing for overhead lines and substations up to 800 kV. The long-rod 3FL work in overhead line strings, and the post insulators 3FS and 3FT are installed in substations indoors and outdoors. They are designed and tested to IEC and ANSI standards.
- 3FL
- long-rod composite (silicone) insulators for overhead lines up to 800 kV
- 3FS / 3FT
- composite post insulators for indoor and outdoor installation
- Design
- continuous light silicone housing, two sealing variants
- Standards
- IEC, ANSI
Price, availability and lead time on request. We help with analogue selection, customs clearance and delivery.
Description
The company's composite insulator combines high dielectric strength and mechanical resistance in a light continuous silicone housing. The body is made as one piece, so the design is compact and light. The company has made medium- and high-voltage surge arresters since 1925, and composite insulators are produced in the same line of business and at the same plants. The end fittings are sealed in one of two ways, the choice depending on customer requirements.
Long-rod insulators 3FL are intended for overhead lines. They cover voltage classes up to 800 kV and work in suspension and tension strings of 35–750 kV overhead lines. Post insulators 3FS and 3FT are used in substations, with versions for indoor and outdoor installation. They provide the supporting insulation of substation equipment. The long-rod design replaces a string of many separate elements with one product, which simplifies installation and inspection of the line.
The silicone shed keeps its hydrophobicity throughout the service life. The material resists ultraviolet, pollution and erosion, so the insulators are appropriate in coastal and industrial areas. All products are designed and tested to the current editions of IEC and ANSI standards.
The company is one of the few suppliers offering both insulators and NGLA and EGLA line arresters for overhead lines. The two products are technically matched, so the designer gets the insulation and the line overvoltage protection from one manufacturer. On this basis the company offers line compaction and raising of line capacity (uprating). Details of such projects are not disclosed in the materials provided.
Insulators and arresters are made at two plants, in Berlin (Germany) and in Wuxi (China). The global competence center is in Berlin, and technical support of projects is provided by the local office of the company. Mechanical load, creepage distance and sizes are not given in the materials provided and are specified on request for a particular line or substation. Typical applications are suspension and tension strings of overhead lines, supporting insulation of substations, and line compaction and upgrade projects.
Technical specifications
| 3FL | long-rod composite (silicone) insulators for overhead lines up to 800 kV |
|---|---|
| 3FS / 3FT | composite post insulators for indoor and outdoor installation |
| Design | continuous light silicone housing, two sealing variants |
| Standards | IEC, ANSI |
| Production | Berlin (Germany), Wuxi (China) |
Request a price and lead time
3FL / 3FS / 3FT — composite line and post insulators up to 800 kV. We reply within one business day.
Or email sales@usk.ua or call 044 339-50-20.
Customs codes
| UKTZED (Ukraine) | 8546 90 90 00 |
|---|---|
| HS, 6 digits | 8546 90 |
| CN (EU) | 8546 90 90 |
| HTSUS (USA) | 8546 90 00 00 |
| China customs tariff | 8546 90 00 00 |
Codes are for reference: the final code is determined at declaration for the specific model.
Questions and answers
Up to what voltage are 3FL insulators used?
Long-rod 3FL insulators are intended for overhead lines up to 800 kV. They are installed in suspension and tension strings of 35–750 kV overhead lines.
How do 3FS and 3FT insulators differ from 3FL?
3FS and 3FT work as substation post insulators for indoor and outdoor installation. 3FL are used in strings of overhead lines up to 800 kV.
To what standards are these insulators tested?
All composite insulators are designed and tested to the current editions of IEC and ANSI standards.
Similar equipment from other manufacturers
