Outdoor High-Voltage Disconnector GW1-2×27.5 (Double-Pole, Vertical Opening)
- Model
- GW1-2×27.5
- Standard
- TB/T 3150-2007；TJ/GD 023-2018
- Category
- Disconnector
- Documents & pricing
- Type test reports, factory inspection records and quotations are available on request; tender documents are archived by project.
Product Overview
The GW1-2×27.5 outdoor high-voltage disconnector features vertical opening and is supplied without / with an earthing knife (Type D). It is used for line isolation and maintenance in the 2×27.5kV traction power supply system of electrified railways.
CRCC Certification Information
| Item | Content |
|---|---|
| Certified unit | Motorized disconnector for overhead contact systems (200km/h and below) |
| Certificate No. | CRCC10226P12329R1S-004 |
| Certificate validity | 2026-06-11 to 2027-11-22 |
| Certification body | China Railway Test & Certification Center (CRCC) |
| Applied standard | GB/T 32580.2-2026 |
Technical Parameters
| Parameter | Value |
|---|---|
| Product model | GW1-2×27.5 |
| Opening mode | Vertical opening |
| Earthing knife configuration | Without / with earthing knife (Type D) |
| Installation | Outdoor |
| Rated voltage | 2×27.5kV |
| Rated current | 400A～3150A |
| Optional current ratings | 1250A / 1600A / 2000A / 2500A / 3150A |
| Applicable speed class | 200km/h and below |
| Rated voltage (Ur) | 27.5 kV / 2×27.5 kV / 55 kV |
| Nominal voltage (Un) | 25 kV / 2×25 kV / 50 kV |
| Rated frequency (fr) | 50 Hz |
| Rated short-time withstand current (Ik) | 16 / 20 / 25 / 31.5 kA (optional) |
| Rated peak withstand current (Ip) | Equal to 2.5 times the rated short-time withstand current |
Note: The above values are taken from Chapter 5 (ratings) of GB/T 32580.2-2026 "Railway Applications - Fixed Installations - High-Voltage AC Switchgear and Instrument Transformers - Part 2: Disconnectors, Earthing Switches and Load Switches".
Structural Features
- Vertical-opening construction with clearly visible open and closed positions
- Without / with earthing knife (Type D), providing a visible isolation point during maintenance
- Outdoor-type construction, resistant to pollution and rain
- Can be fitted with a motorized or manual operating mechanism
- Applicable speed class 200km/h and below
Scope of Application
Suitable for traction substations, switching posts, sectioning posts and electrical sectioning points of the overhead contact system.
Double-pole construction, suitable for 2×27.5kV (AT power supply mode) traction power supply systems.
Note: Parameters such as the specific rated continuous current steps, the mechanical endurance class and the rated insulation level (lightning impulse / power-frequency withstand) are subject to the annex of the CRCC certificate and the factory test report, which are available on request.