LW3-12(G) Outdoor SF6 H.V. Circuit Breaker
1.General description
LW3-12, LW3-12(G) outdoor SF6 circuit breaker is a new type outdoor appliance which use SF6 gas as the medium for arcing and insulating. Its operation mechanism including(type I ) manually energy-stored spring operation mechanism, (type II) automatical energy-stored spring operation mechanism and (type III) DC electromagnetic operation mechanism. These mechanisms and circuit breaker it self form a perfect whole. Compares to other outdoor circuit breaker in rated 12kV, this product has several advantages such as simple structure, excellent arc-extinguishing and insulating capacity, small working frequency, high rated parameter, and long service life and less maintenance, which can not only reduce the floor space but also deduct the project cost and eliminate the fire hazards.
2.Main technical parameter
3.Product show
4.International fairs
1.General description
LW3-12, LW3-12(G) outdoor SF6 circuit breaker is a new type outdoor appliance which use SF6 gas as the medium for arcing and insulating. Its operation mechanism including(type I ) manually energy-stored spring operation mechanism, (type II) automatical energy-stored spring operation mechanism and (type III) DC electromagnetic operation mechanism. These mechanisms and circuit breaker it self form a perfect whole. Compares to other outdoor circuit breaker in rated 12kV, this product has several advantages such as simple structure, excellent arc-extinguishing and insulating capacity, small working frequency, high rated parameter, and long service life and less maintenance, which can not only reduce the floor space but also deduct the project cost and eliminate the fire hazards.
2.Main technical parameter
| Item | Unit | Data | |
| Rated voltage | kV | 12 | |
| Max. working voltage | kV | 12 | |
| Rated insulation level(when the short circuit is filled with SF6 gas was 0.25Mpa,20ºC) | Lightning impulse withstand voltage(peak) | kV | 75 |
| 1 min P.F. withstand voltage | kV | 42 | |
| Rain test | kV | 34 | |
| Inverting impulse withstand voltage | kV | 85 | |
| Insulation level under zero gauge pressure | P.F. withstand voltage 1 min | kV | 30 |
| Inverting-phase withstand voltage 1 min | kV | 30 | |
| Max. phase voltage 5 min | kV | 12 | |
| Rated current | A | 400,630 | |
| Rated short-circuit breaking current | kA | 6.3 8 12.5 | |
| Breaking current under zero gauge pressure | A | 400 630 | |
| Rated operating sequence | type I | O-180s-CO-180s-CO | |
| type II III | O-0.3s-CO-180s-CO | ||
| Rated closing current( peak) | kA | 16 20 31.5 | |
| Rated dynamic stability current(peak) | kA | 16 20 31.5 | |
| Rated thermal stability current | kA | 6.3 3 12.5 | |
| Rated thermal stability times | s | 4 | |
4.International fairs