FYFH-2.0AT-E Heavy-Duty Section Insulator (25kV)
Enhanced-insulation heavy-tension section insulator for 20kN contact wire systems on 25kV AC OCS, up to 160 km/h.
This image shows a representative model of the series; the actual product may vary in appearance.
Specifications
| Model | FYFH-2.0AT-E |
|---|---|
| Drawing No. | CWLFD2.0AT-E-00 |
| Standard | TB/T 3036-2016 Section Insulators for Electrified Railway OCS |
| Rated Voltage | 27.5kV rated (25kV AC 50Hz single-phase traction supply) |
| Design Speed | Up to 160 km/h (designed to TB/T 3036-2016) |
| Operating Temperature | -40°C to +70°C |
| Altitude | ≤ 4,000 m (designed for 2000-4000m high-altitude service) |
| Materials | High-strength aluminum alloy body for 20kN tension class; arc-resistant insulating elements; reinforced creepage; enlarged air gap geometry |
| Installation | In-line series suspension on the contact wire; both ends mechanically connected to the contact wire; verify tensioner compatibility for 20kN class |
The FYFH-2.0AT-E is the heavy-tension variant of the FYFH enhanced-insulation family, designed and manufactured per TB/T 3036-2016 for in-phase electrical sectioning of 25kV AC electrified railway overhead contact systems where the contact wire is rated at 20kN working tension. The -E enhancement adds air gap ≥430mm and reinforced creepage for severe-service environments.
The 20kN tension rating suits high-speed mainlines, heavy-haul freight corridors and mainline passenger railways with high contact wire tension. A high-strength aluminum alloy body carries the 20kN tensile load; arc-resistant insulating elements with reinforced creepage provide in-phase separation.
Rated for 27.5kV systems, line speeds up to 160 km/h, -40°C to +70°C and altitudes up to 4,000 m. Suitable for high-altitude lines, coastal and salt-fog regions, and heavy-pollution corridors where the standard 300mm gap is insufficient.
Henan Chuangwit Railway Equipment provides datasheets, type test reports and project engineering support for the FYFH-2.0AT-E heavy-tension enhanced variant.
Frequently Asked Questions
How to select for higher contact wire tension classes?
This model carries the 20 kN contact wire working tension class (the standard 1.6/1.8 series are rated 16/18 kN), suitable for heavy-haul and high-tension lines, with tensile failure load ≥80 kN.
What is the maximum permissible passing speed of this model?
Maximum permissible passing speed ≤160 km/h, for heavy-haul freight trunk lines and high-tension passenger line sections.
What are the enhanced insulation and service condition parameters?
Air gap enlarged to ≥430 mm with reinforced creepage distance; altitude ≤4000 m (applicable to high-altitude service at 2000-4000 m); operating temperature -40°C to +70°C.
What technical support is available before volume procurement?
Type-selection verification (including tension compensator compatibility confirmation), drawing confirmation, volume supply and on-site technical guidance, backed by standardized factory manufacturing.
Performance
Operating Conditions
Designed for severe-service outdoor railway environments with 20kN contact wire tension: heavy-haul lines, high-tension mainline passenger railways, high-speed mainlines.
Mechanical Performance
Aluminum alloy body rated for 20kN contact wire working tension; reinforced insulation geometry supports enlarged air gap.
Electrical Performance
Enhanced arc-resistant insulation with air gap ≥430mm and extended creepage provides in-phase separation per TB/T 3036-2016 for 27.5kV systems in heavy-tension severe-service applications.
Applications
Heavy-Haul Freight
20kN contact wire tension on heavy-haul freight corridors.
High-Tension Mainlines
High-tension mainline passenger railways with 20kN contact wire.
Coastal & Salt-Fog
Severe-service coastal and salt-fog environments at 20kN tension.
Heavy-Pollution Corridors
Industrial zones with high pollution severity class at 20kN tension.
