GW4-264 isolation switch is an outdoor AC isolation switch designed specifically for 264kV high-voltage power systems, mainly used for circuit switching and equipment electrical isolation under no-load conditions
The GW4 series 264kV isolation switch combines safety, durability, and easy maintenance in high-voltage systems through structural optimization and material upgrades.
| Rated voltage | 15kV |
| Rated lightning impulse voltage (peak value) | To earth:95kV Across the isolating:105kV |
| 1 min rated power frequency voltage(virtual value) | To earth:45KV Across the isolating:50kV |
| Insulator creepage distance ratio | ≥3.1cm/kV(IV Level pollution area) |
| Rated current | 630/1250/1600/2000/2500/3150A |
| (4S)Rated short circuit current | 20kA/31.5kA/40kA |
| Rated current peak tolerance | 40kA |
| Across the isolating distance | 170mm |
| Phase to phase distance | 450mm |
Adopting a single column dual arm structure, with a plug-in design for both moving and stationary contacts, resulting in low contact resistance;
Coating treatment of conductive components to enhance corrosion resistance; The grounding circuit adopts aluminum alloy conductive rods and soft connections, with high reliability;
Waterproof design of bearing seat, exposed standard stainless steel material to reduce the risk of corrosion
Isolation and maintenance equipment for substations/power plants to ensure the safety of maintenance personnel
The power distribution system cooperates with circuit breakers to achieve power outage operation process control (disconnect the circuit breaker before power outage, and close the isolation switch before power transmission)
Switching high-voltage lines under no-load conditions to optimize the operation of the power grid
