FYFH-1.6AT-E Enhanced Section Insulator (25kV)
Enhanced-insulation section insulator with reinforced creepage for severe-service 25kV AC OCS (high altitude, heavy pollution), up to 160 km/h.
This image shows a representative model of the series; the actual product may vary in appearance.
Specifications
| Model | FYFH-1.6AT-E |
|---|---|
| Drawing No. | CWLFD1.6AT-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; arc-resistant insulating elements (silicone rubber / porcelain); reinforced creepage |
| Installation | In-line series suspension on the contact wire; both ends mechanically connected to the contact wire |
The FYFH-1.6AT-E enhanced-insulation section insulator is designed and manufactured per TB/T 3036-2016 for in-phase electrical sectioning of 25kV AC electrified railway overhead contact systems in severe-service environments. Compared with the standard FYFH-1.6AT-S, the -E variant enlarges the air insulation gap to ≥430mm and reinforces creepage distance for high-altitude lines (2000-4000m) and heavy-pollution / coastal / tunnel sections.
A high-strength aluminum alloy body carries the contact wire tensile load; arc-resistant insulating elements (silicone rubber or porcelain) with extended creepage provide reliable in-phase separation. Rated for 27.5kV systems, line speeds up to 160 km/h, -40°C to +70°C operating temperature and altitudes up to 4,000 m.
Typical applications include high-altitude electrified railways (e.g. Lanzhou-Urumqi, Sichuan-Tibet plateau feeder lines), coastal and salt-fog regions, and heavy-pollution industrial corridors where the standard 300mm air gap is insufficient.
Henan Chuangwit Railway Equipment provides datasheets, type test reports and project engineering support for the FYFH-1.6AT-E enhanced variant.
Frequently Asked Questions
How does the enhanced (-E) type differ from the standard type in insulation?
The air insulation clearance is enlarged to ≥430 mm (standard type ≥300 mm) and the creepage distance is reinforced, adapting to heavily polluted and coastal salt-fog environments.
Which severe service environments is it suitable for?
Suitable for high-altitude lines from 2000 m to 4000 m and for coastal, salt-fog, heavily polluted and long tunnel sections, for pollution degree d and above.
What is the maximum permissible passing speed?
Maximum permissible passing speed ≤160 km/h, for speed-raised and conventional trunk line sections.
Can customized solutions be provided for specific line conditions?
Yes. Customized solutions are available according to the specific pollution degree and altitude of the line, together with type-selection verification, drawing confirmation, volume supply and on-site technical guidance.
Performance
Operating Conditions
Designed for severe-service outdoor railway environments: high altitude (2000-4000m), coastal/salt-fog, heavy-pollution industrial corridors, long tunnels.
Mechanical Performance
Same mechanical envelope as standard FYFH-1.6AT-S; aluminum alloy body carries full contact wire tension with reinforced insulation geometry.
Electrical Performance
Enhanced arc-resistant insulation with air gap ≥430mm and extended creepage distance provides in-phase separation per TB/T 3036-2016 for 27.5kV systems in severe-service environments.
Applications
High-Altitude Lines
Lines at 2000-4000m altitude where standard 300mm gap is insufficient.
Coastal & Salt-Fog Regions
Reinforced creepage withstands salt pollution.
Heavy-Pollution Corridors
Industrial zones with high pollution severity class.
Long Tunnels
Tunnel environments with concentrated contamination and condensation.
