Composite long-rod insulator 3FL9, load class ≤ 550 kN, 3FL composite platform (family Um 72.5 – 800 kV, SML up to 630 kN), one-piece HTV silicone housing on ECR FRP rod, suspension & tension
3FL9
- Load class ≤ 550 kN per the official product hierarchy — the highest 3FL class listed there, within the family's stated 70 – 630 kN SML span
- Above the 210 kN limit of family sealing system A, which per the family flyer places it in the sealing system B range (100 – 630 kN): triple point fully encapsulated, gap between housing and end fitting completely sealed with elastic silicone gel
- One-piece HTV silicone rubber housing, direct-injection molded — prevents partial discharges and provides hydrophobicity transfer for highest pollution performance
- Boron-free ECR glass FRP core rod — brittle-fracture resistant, hydrolysis- and acid-resistant; forged-steel end fittings per IEC 61466-1 and ANSI C29.2 with integrated grading ring
- Family designed and tested to the latest IEC 61109, ANSI C29.11, ANSI C29.12 and CSA C411.4-16; also available combined with line hardware and line surge arresters — per-type ratings, lengths and creepage on request
Extra-heavy tension strings on overhead transmission linesOverhead transmission line suspension stringsHigh-pollution area outdoor insulationLine surge arrester assemblies
Sign in to see your price, availability and framework terms for 3FL9.
Horizon-3 pattern: this exact page gains commerce powers on sign-in — the URL never changes.
SIMULATED · ASK-AN-EXPERT PILOT DEMO
Ask an expert about 3FL9
15 minutes with the right arresters & insulators specialist — question in, booked call out. No email archaeology.
Checking availability…
3FL9 covers 72.5–800 kV of the long-rod & station post range (≤ 800 kV across the category, √ scale).
Specifications
Main
| Product family | 3FL9 |
| Product type | Composite (silicone) long-rod insulator |
| Application | Suspension and tension on overhead lines (3FL family) |
| Housing | One-piece HTV silicone rubber, direct injection molding onto the rod (family design) |
| Hierarchy load class | 3FL9 insulators ≤ 550 kN (official product hierarchy) |
Family ratings (3FL platform — per-type 3FL9 values on request)
| Mechanical class (SML), family | 70 – 630 kN across the 3FL family; 3FL9 hierarchy class ≤ 550 kN — exact per-type SML by order code |
| Voltage class (Um), family | 72.5 – 800 kV (3FL family range) |
| Sealing system | Above 210 kN only family sealing system B applies per the flyer's stated ranges: triple point fully encapsulated, gap sealed with elastic silicone gel (100 – 630 kN) |
| Core | ECR glass (boron-free) FRP rod — brittle-fracture resistant, hydrolysis- and acid-resistant |
| End fittings | Forged steel per IEC 61466-1 and ANSI C29.2 |
| Field control | Integrated grading ring reduces electrical field stress |
Standards & certifications
| Design & testing | IEC 61109, ANSI C29.11, ANSI C29.12, CSA C411.4-16 (latest versions, family-wide) |
| End fittings | IEC 61466-1, ANSI C29.2 |
Documents & downloads
Flyer 3FL long rod insulators — Composite technology up to 800 kV
Datasheet 3FL9 type-specific technical data (ratings, lengths, creepage) — available on request
Brochure Our portfolio of surge arresters & composite insulators — overhead line solutions incl. 3FL composite insulators up to 800 kV (current online edition)
Related products
3FH 
3FL2
Composite hollow-core insulators 3FH — apparatus housings for breakers, bushings and instrument transformers; detailed ratings on request
Apparatus housings · Composite hollow-core · Ratings on request Datasheet · Dimensions ↓ 3FL-HVDCHVDC converter tension insulators, 3FL composite long-rod platform, one-piece HTV silicone housing on ECR glass FRP rod
HVDC converter tension duty · 3FL composite long-rod platform · Silicone housing Datasheet · Dimensions ↓ 3FL2