Rated parameters
Voltage level: 40.5kV, suitable for three-phase AC 50Hz power system 24.
Current specifications: covering configurations such as 630A, 1250A, 2000A, etc., to meet different load requirements.
Insulation performance: Power frequency withstand voltage of 95kV (to ground), lightning impulse withstand voltage of 185kV (to ground), in compliance with IEC standards.
The 35/40.5kV GW4 isolation switch has become the core equipment for safe isolation in medium voltage power systems through high-strength mechanical design and optimization of high conductivity materials. Selection should focus on rated current, operating mode, and environmental adaptability.
| 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 |
Used to form visible breakpoints during circuit isolation or maintenance under no-load conditions, and cannot interrupt load current or short-circuit current.
Support grounding knife switch (such as GW4-40.5DW type) to achieve synchronous operation between the main circuit and the grounding circuit
Substation isolation: used for isolating incoming and outgoing lines of 35kV substations, segmenting busbars, and grounding neutral points of transformers.
Maintenance of power distribution system: During circuit breaker maintenance, cut off the power supply to form a physically visible breakpoint.
Adaptation to harsh environments: Anti fouling type (GW4-40.5DW) suitable for high pollution areas such as salt spray and humidity
