FYFH-1.6AT-S Shuttle Section Insulator (25kV AC)
Shuttle-type Type A section insulator per TB/T 3036-2016 for in-phase sectioning of 25kV AC railway OCS, up to 160 km/h.
Specifications
| Model | FYFH-1.6AT-S |
|---|---|
| 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 FYFH-1.6AT shuttle-type section insulator (Type A) is designed and manufactured in accordance with TB/T 3036-2016, the Chinese railway industry standard for section insulators used in electrified railway overhead contact systems (OCS). It provides reliable in-phase electrical separation between adjacent OCS sections on 25kV AC 50Hz single-phase traction power networks, while maintaining smooth mechanical passage for the pantograph.
The shuttle-type profile guides the pantograph carbon strip across the insulating zone with minimal dynamic disturbance. A high-strength aluminum alloy body carries the contact wire tensile load, and arc-resistant insulating elements (silicone rubber or porcelain) isolate the two electrical sections. The design is rated for a system voltage of 27.5kV and design speeds up to 160 km/h, with an operating temperature range of -40°C to +70°C and altitudes up to 4,000 m.
Typical applications include station throats, depot entrances, sectioning points on mainline railways and locations where independent power supply zones are required on the same phase. The unit is installed in-line with the contact wire as a horizontal series suspension, with both ends mechanically connected to the contact wire.
Henan Chuangwit Railway Equipment Co., Ltd. manufactures the FYFH-1.6AT series under a certified quality system, with type tests covering mechanical strength, electrical withstand and arc resistance. Custom configurations for specific line conditions are available on request.
Frequently Asked Questions
To which standard and type is this model designed?
It is designed and manufactured to the Type A section insulator requirements of TB/T 3036-2016 Section Insulators for Overhead Contact Systems of Electrified Railways, for in-phase electrical sectioning of power-frequency single-phase AC overhead contact systems.
What are the main mechanical performance figures?
Maximum working tensile load ≥16.5 kN; tensile failure load ≥52 kN; initial slip force at the contact wire joint not greater than 3.0 kN with no slippage.
What are the electrical performance parameters?
Creepage distance ≥1600 mm; air insulation clearance ≥300 mm; lightning impulse withstand voltage ≥160 kV; power-frequency wet flashover voltage ≥87 kV.
Which environmental conditions is it suitable for?
Maximum permissible passing speed ≤160 km/h; suitable for high-humidity, high-salt-density, heavily polluted, coastal and tunnel sections; altitude ≤4000 m.
Performance
Operating Conditions
| Application | In-phase electrical sectioning of power-frequency single-phase AC electrified railway overhead contact systems |
|---|---|
| Rated Working Voltage | 27.5 kV |
| Altitude | ≤ 4,000 m |
| Ambient Temperature | -40°C to +70°C |
| Environmental Conditions | Suitable for high-humidity, high-salt-density, heavily polluted, coastal and tunnel sections |
| Max. Permissible Passing Speed | ≤ 160 km/h |
Mechanical Performance
| Max. Working Tensile Load | ≥ 16.5 kN |
|---|---|
| Tensile Failure Load | ≥ 52 kN |
| Initial Slip Force at Contact Wire Joint | ≤ 3.0 kN, no slippage |
Electrical Performance
| Lightning Impulse Withstand Voltage (1.2/50 μs) | ≥ 160 kV |
|---|---|
| Power-Frequency Wet Flashover Voltage | ≥ 87 kV |
| Artificial Pollution Withstand Voltage (SDD 0.4 mg/cm², NSDD 2.0 mg/cm²) | ≥ 37 kV |
| Creepage Distance | ≥ 1600 mm |
| Air Insulation Clearance | ≥ 300 mm |
Applications
Mainline Railways
In-phase sectioning on trunk lines and trunk lines up to 160-200 km/h (type-dependent).
Stations & Depots
Electrical separation at station throats, depot entrances and stabling sidings.
Humid & Rainy Regions
Arc-resistant insulation maintains performance in high-humidity and heavy-rainfall areas.
Cold Regions
Rated for -40°C low-temperature operation in severe winter climates.
