Neutral Section Insulator for Electrified Railway OCS (XFXP-1.80T)
- Model
- XFXP-1.80T
- Standard
- TB/T 3037-2002
- 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
The neutral section insulator is used at the phase separation sections of the overhead contact system (OCS) of electrified railways, isolating power supply arms of different phases and ensuring that electric locomotives pass through the neutral section safely.
CRCC Certification Information
| Item | Content |
|---|---|
| Certified unit | Neutral section insulator for electrified railway overhead contact systems |
| Certification standard | TB/T 3037-2002 "Neutral Section Insulators for Overhead Contact System of Electrified Railway" |
| Certificate No. | CRCC10222P12329R1S-001 |
| Certificate validity | 2026-04-16 to 2027-11-22 |
| Certification body | China Railway Test & Certification Center (CRCC) |
Technical Parameters
| Parameter | Technical Requirement (TB/T 3037-2002) |
|---|---|
| Product model | XFXP-1.80T |
| Model type | Arc-extinguishing type (X = arc extinction, F = neutral section, X = composite insulating element, P = arc-extinguishing type) |
| Creepage distance | 1.80m (standard requirement ≥1600mm) |
| Product drawing No. | GHS-XFXP-1.80T-0 |
| Nominal voltage | AC 25 kV |
| Tensile breaking load | ≥52 kN |
| Routine tensile test load | ≥26 kN |
| Initial sliding force | ≥90% of the comprehensive tensile breaking force of the contact wire in use |
| Fatigue test | 10kN±3kN (dynamic load factor 0.3); tensile breaking load after 50 ten-thousand cycles ≥45kN |
| Minimum air insulation clearance | ≥300 mm |
| Power-frequency wet flashover voltage (arc-extinguishing type) | ≥87 kV |
| Lightning impulse withstand voltage (1.2/50μs) | ≥+160 kV (±180 kV for the non-arc-extinguishing type) |
| Maximum annual pollution deposit | ≤0.4 mg/cm² (equivalent salt deposit density) |
| Applicable operating speed | ≤160 km/h |
| Ambient temperature | -40℃ ~ +40℃ |
| Altitude | ≤1000m (corrected by the Ka factor at higher altitudes) |
| Service life | ≥15 years |
Electromechanical Performance of the Insulated Runner
| Parameter | Technical Requirement |
|---|---|
| Tensile breaking load (single insulated runner) | ≥52 kN |
| Tensile breaking load (double insulated runners) | ≥30 kN |
| Wear resistance | ≥50 ten-thousand pantograph passes |
| Dry power-frequency withstand voltage | ≥160 kV |
| Wet power-frequency withstand voltage | ≥130 kV |
| Full-wave impulse withstand voltage (1.2/50μs) | ≥270 kV |
| Artificial pollution withstand voltage (salt deposit density 0.40mg/cm²) | ≥40 kV |
| Surface tracking and erosion resistance | Class 1A3.5 |
| Surface arc resistance | ≥180 s |
| DC leakage current (at 30kV DC) | ≤5 μA |
Structural Features
- Arc-extinguishing construction; the arc-extinguishing horn gap can extinguish by itself the arc generated when the pantograph passes
- The runner and the insulating elements of the arc-extinguishing neutral section insulator are not burned or scorched by the arc
- Withstands the phase-to-phase voltage; the insulation margin meets the requirements of the neutral section
- Service life ≥15 years
Scope of Application
Suitable for out-of-phase electrical sectioning points of 25kV single-phase AC overhead contact systems of electrified railways.
Note: The values in the table are the technical requirements specified by TB/T 3037-2002. The measured values of actual products are subject to the factory test report.