FYHH-1.6AT Rhombic Section Insulator for 25kV AC Overhead Contact Line
TB/T 3036-2016 | Balanced rhombic structure | Rated 27.5kV
Specifications
| Model | FYHH-1.6AT |
|---|---|
| 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 (depending on sub-model) |
| Operating Temperature | -40°C to +70°C |
| Altitude | ≤ 4,000 m |
| Materials | High-strength aluminum alloy body; arc-resistant insulating elements (silicone rubber / porcelain) |
| Installation | In-line series suspension on the contact wire; both ends mechanically connected to the contact wire |
The FYHH-1.6AT rhombic section insulator is manufactured per TB/T 3036-2016 for in-phase electrical sectioning of 25kV AC 50Hz single-phase electrified railway overhead contact lines. The rhombic geometry distributes mechanical stress evenly across the frame, contributing to stable long-term operation under continuous pantograph passage.
The load-bearing structure is high-strength aluminum alloy; insulating elements are arc-resistant silicone rubber or porcelain. The unit is rated for 27.5kV systems, line speeds up to 160 km/h (sub-model dependent), temperatures from -40°C to +70°C and altitudes up to 4,000 m.
Even stress distribution in the rhombic frame reduces fatigue concentration at connection points, which is valuable on heavily trafficked lines where section insulators see millions of pantograph passages over their service life.
Installation is a standard in-line series suspension in the contact wire with mechanical end connections. Henan Chuangwei Railway Equipment supplies the FYHH series with type test reports and technical support for layout design.
Frequently Asked Questions
What advantage does the rhombic structure offer?
The rhombic frame distributes contact wire tensile stress evenly, reducing fatigue concentration at end connections — beneficial on heavily trafficked lines with frequent pantograph passages.
What is the rated voltage and speed?
Rated for 27.5kV systems (25kV AC 50Hz traction supply) and line speeds up to 160 km/h depending on sub-model.
Which standard applies?
TB/T 3036-2016 for section insulators used in electrified railway OCS. Type test reports are supplied with delivery.
Performance
Operating Conditions
Continuous outdoor service on electrified railways from -40°C to +70°C, altitudes to 4,000 m, including polluted and humid railway corridor atmospheres.
Mechanical
The rhombic aluminum alloy frame distributes tensile stress evenly across the structure, reducing fatigue at connections under frequent pantograph passage.
Electrical
Arc-resistant insulation provides in-phase separation per TB/T 3036-2016 for 27.5kV systems; electrical performance verified by type tests.
Applications
Mainline Railways
High-traffic trunk lines where fatigue resistance matters.
Stations & Junctions
In-phase sectioning in complex station layouts.
Humid & Rainy Regions
Arc-resistant insulation for wet climates.
Cold Regions
Operation down to -40°C.