XFXP-1.8T Neutral Section Insulator (Classic) for 25kV AC Railway
TB/T 3037-2002 | Proven classic design | Low maintenance cost
Specifications
| Model | XFXP-1.8T-C |
|---|---|
| Standard | TB/T 3037-2002 Phase Separation Insulators for Electrified Railway OCS |
| Rated Voltage | 27.5kV rated (25kV AC 50Hz single-phase, inter-phase sectioning) |
| Design Speed | Up to 200 km/h (depending on sub-model) |
| Operating Temperature | -40°C to +70°C |
| Altitude | ≤ 4,000 m |
| Materials | High-strength insulating elements; arc-resistant runners; aluminum alloy connection fittings |
| Installation | Series-mounted in the contact wire at neutral sections; used with trackside automatic phase-breaking equipment |
The XFXP-1.8T classic neutral section insulator complies with TB/T 3037-2002, the railway industry standard for phase separation insulators used in electrified railway overhead contact systems. It provides electrical separation between different supply phases on 25kV AC catenary, allowing trains to coast through neutral sections safely.
This classic variant uses a time-proven structure that has been validated over years of service on Chinese railways. High-strength insulating elements, arc-resistant runners and aluminum alloy connection fittings form a robust assembly rated for 27.5kV systems, line speeds up to 200 km/h (sub-model dependent), -40°C to +70°C and altitudes up to 4,000 m.
The insulator is installed in series with the contact wire at neutral section locations and is used together with trackside automatic phase-breaking (auto-passage) equipment. Its mature structure keeps maintenance simple and lifecycle cost low.
Henan Chuangwei Railway Equipment Co., Ltd. manufactures the XFXP series under a certified quality system. Datasheets and type test reports are available on request.
Frequently Asked Questions
What is a neutral section insulator?
It separates two different supply phases on a 25kV AC catenary, creating a short neutral (dead) zone that the train coasts through, typically where two traction substations' phases meet.
Which standard applies to the XFXP-1.8T?
TB/T 3037-2002 (phase separation insulators for electrified railway OCS). We can discuss alignment with EN 50119 requirements for international projects.
Is the classic model still recommended for new lines?
Yes — its proven structure and low maintenance cost make it a solid default; the 2019/2021 models offer updated details where specified.
Performance
Operating Conditions
Continuous outdoor service at neutral sections from -40°C to +70°C, altitudes to 4,000 m, including polluted and humid environments.
Mechanical
Proven load path with aluminum alloy fittings carrying contact wire tension; smooth pantograph passage at up to 200 km/h.
Electrical
High-strength insulating elements and arc-resistant runners provide inter-phase separation per TB/T 3037-2002 for 27.5kV systems.
Applications
Neutral Sections
Phase separation between substation supply zones on 25kV AC lines.
Auto Phase-Breaking
Works with trackside automatic neutral-section passage systems.
Humid & Rainy Regions
Arc-resistant runners for wet-climate reliability.
Cold Regions
Operation down to -40°C.