Composite post insulator 3FT2, HTV silicone housing, 63.5 mm ECR core, SCL 18 kNm, 0.5 – 3.0 m, AC/DC
3FT2
- 63.5 mm (2.5") core-diameter class of the 3FT family (3FT2 – 3FT7, SCL 18 – 150 kNm), for station post and line post applications on both AC and DC systems
- HTV silicone housing applied by multi-shot injection molding on an ECR (electrical and corrosion resistant) fiberglass core; overmolded end fittings seal the triple point against moisture ingress
- Lightning withstand > 1600 kV at maximum length; creepage factor 4.2 shed profile per IEC 60815-3 (AC) / IEC 60815-4 (DC)
- Configurable length in 12.5 mm increments, stackable for greater total height; end fittings: tapped flange 4x M16 D127, through-holes flange 4x D18 D127, drop hole tongue, and flat & gain bendable base
- Designed and tested to IEC 61952 / IEC 62231 and ANSI C29.17 / C29.19; optional Factory Acceptance Tests (FAT) in Asia and Europe
Busbar support in HV substationsSupport insulator below HV equipmentInclined and braced line postJumper supportInterface and interline spacersComposite insulator crossarm (CICA)
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Specifications
Main
| Product family | 3FT2 |
| Product type | Composite post insulator (station post / line post) |
| Series | 3FT composite post insulators, core classes 3FT2 – 3FT7 |
| Current type | AC and DC |
Ratings
| Core diameter | 63.5 mm (2.5") |
| Specified Mechanical Load (SCL) | 18 kNm (equivalent to ceramic breaking load) |
| Maximum Design Cantilever Load (MDCL) | 9 kNm |
| Length | 0.5 – 3.0 m single unit, in 12.5 mm increments; stackable |
| Lightning withstand | > 1600 kV |
| Creepage factor (creepage/arcing) | 4.2 |
| System voltage validation | 3FT family validated by electrical-field simulations up to 800 kV system voltage; larger corona rings required at higher system voltages |
Mechanical & environment
| Housing | HTV silicone rubber, multi-shot injection molded — aging-resistant, hydrophobic, UV-resistant |
| Core | ECR fiberglass rod (electrical and corrosion resistant) |
| End fittings | Tapped flange 4x M16 D127 · through-holes flange 4x D18 D127 · drop hole tongue · flat & gain bendable base (all four styles available on 3FT2) |
| Adhesion system | Extensively tested primer system bonding silicone housing, fiberglass rod and end fittings, with continuous monitoring and strict quality control in production |
Standards & certifications
| Line post | IEC 61952 · ANSI C29.17 |
| Station post | IEC 62231 · ANSI C29.19 |
| Shed profile | IEC 60815-3 (AC) · IEC 60815-4 (DC) |
| Testing | Fully tested to IEC and ANSI standards; optional Factory Acceptance Test (FAT) in Asia and Europe |
Documents & downloads
Flyer 3FT composite post insulators — Engineered for extreme performance
Datasheet 3FT2 type-specific datasheet — available on request
Ordered designations
Representative orderable type designations of this family — searchable via the catalog search.
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