27.5kV Double-Pole Disconnect Switch for Railway Traction Power
Vertical-break outdoor type | Reliable switching | Easy maintenance
Specifications
| Model | GW1-27.5(2×27.5) |
|---|---|
| Standard | GB 1985-2014 HV AC disconnectors and earthing switches; TB/T railway industry standards |
| Rated Voltage | 27.5kV / 10kV / 15kV (per model) |
| Design Speed | N/A (fixed installation equipment) |
| Operating Temperature | -40°C to +70°C |
| Altitude | ≤ 4,000 m |
| Materials | Hot-dip galvanized steel frame; copper alloy contacts; high-strength post insulators |
| Installation | Pole-side or independent foundation mounting; manual / motorized / hand-crank operating mechanisms |
The GW1-27.5 (2×27.5) double-pole disconnect switch is a vertical-break outdoor high-voltage disconnect switch for electrical isolation in electrified railway overhead contact systems and traction substations. The double-pole configuration isolates both conductors simultaneously, providing a clear, visible break for maintenance safety.
Designed per GB 1985-2014 (high-voltage AC disconnectors and earthing switches) and relevant TB/T railway industry standards, the switch uses a hot-dip galvanized steel frame, copper alloy contacts and high-strength post insulators. It operates from -40°C to +70°C at altitudes up to 4,000 m.
Mounting options include pole-side installation or independent foundations, with manual, motorized or hand-crank operating mechanisms to match site automation requirements.
Henan Chuangwei Railway Equipment Co., Ltd. supplies the switch with type test documentation and engineering support for traction power projects.
Frequently Asked Questions
What is a double-pole disconnect switch used for on railways?
It isolates both conductors of a 27.5kV circuit simultaneously — typically at catenary sectioning points and traction substations — giving maintenance crews a visible, reliable break.
Which operating mechanisms are available?
Manual, hand-crank and motorized mechanisms are available; motorized versions support remote control and automation retrofits.
Which standards apply?
GB 1985-2014 for HV AC disconnectors and relevant TB/T railway industry standards.
Performance
Operating Conditions
Outdoor service on railway traction power networks from -40°C to +70°C, altitudes to 4,000 m, including polluted and humid atmospheres.
Mechanical
Vertical-break double-pole mechanism with galvanized steel frame and copper alloy contacts for reliable, low-maintenance switching.
Electrical
Rated for 27.5kV traction systems per GB 1985-2014; visible double-break isolation for maintenance safety.
Applications
Catenary Isolation
Section isolation on electrified railway OCS.
Traction Substations
Incoming/outgoing feeder isolation.
Outdoor Service
Galvanized structure for open-air duty.
Cold Regions
Operation down to -40°C.