Section Insulator for Electrified Railway OCS (FYFH-2.0BT)
- Model
- FYFH-2.0BT
- Standard
- TB/T 3036-2016
- Category
- Section Insulator
- Documents & pricing
- Type test reports, factory inspection records and quotations are available on request; tender documents are archived by project.
Product Overview
This product is used for electrical sectioning of the overhead contact system (OCS) of electrified railways. Installed between the contact wire and the messenger wire, it achieves electrical isolation between two power supply sections by means of an insulated runner, while allowing the pantograph to pass smoothly.
CRCC Certification Information
| Item | Content |
|---|---|
| Certified unit | Section insulator |
| Certification standard | TB/T 3036-2016 "Section Insulators for Overhead Contact System of Electrified Railway" |
| Certificate No. | CRCC10222P12329R1S-002 |
| Certificate validity | 2026-06-30 to 2027-11-22 |
| Certification body | China Railway Test & Certification Center (CRCC) |
Technical Parameters
| Parameter | Technical Requirement (TB/T 3036-2016) |
|---|---|
| Product model | FYFH-2.0BT |
| Model type | Type B (maximum working load 31.5kN) |
| Creepage distance | 2.0m (standard requirement ≥1600mm) |
| Air insulation clearance | ≥430mm |
| Product drawing No. | GHS-FYFH-2.0BT-0 |
| Nominal voltage | AC 25 kV |
| Maximum working load | 31.5kN |
| Tensile breaking load | ≥94.5kN |
| Routine tensile test load | ≥47.3kN |
| Lightning impulse withstand voltage (1.2/50μs) | ≥160 kV |
| Power-frequency wet flashover voltage | ≥87 kV |
| Artificial pollution withstand voltage (salt deposit density 0.4mg/cm², nonsoluble deposit density 2.0mg/cm²) | ≥37 kV |
| Creepage distance | ≥1600 mm |
| Initial sliding force | ≥95% of the comprehensive tensile breaking force of the connected contact wire |
| Vibration test | 2×10⁶ cycles at maximum working load, amplitude 35mm, frequency 1Hz~3Hz |
| Axial fatigue test | Reduction of tensile breaking load ≤5% after 5×10⁵ cycles |
| Applicable operating speed | ≤120 km/h |
| Ambient temperature | -40℃ ~ +40℃ |
| Altitude | ≤1400m (at higher altitudes the test voltage shall be corrected by the Ka factor) |
Model Designation
In accordance with Clause 4.2 of TB/T 3036-2016, the model designation FYFH-2.0BT indicates: a creepage distance of 2.0m, Type B construction, suitable for copper or copper alloy contact wires.
Structural Features
- Type B construction with a maximum working load of 31.5kN
- Combination of an insulated runner and a conductive runner, providing both insulation and conductivity
- The arc horn gap can divert or extinguish by itself the arc generated when the pantograph passes
- Capable of withstanding repeated continuous passages of the pantograph
Scope of Application
Suitable for same-phase electrical sectioning points of 25kV single-phase AC electrified railway overhead contact systems, at stations and in inter-station sections.
Note: The values in the table are the minimum technical requirements specified by TB/T 3036-2016. The measured values of actual products are subject to the factory test report, which is available on request.