The LRFW series outdoor SF6 load switch is a three-phase AC 50Hz /60Hz outdoor medium-voltage switchgear, which can break off and close the load current and overload current in the power system; The load switch is equipped with intelligent controller to realize the automation of distribution system.
Maximum diurnal temperature difference：≤25 ℃
| Item | Unit | Data | ||
|---|---|---|---|---|
| Rated voltage | kV | 12 | 24 | 36 |
| Rated frequency | Hz | 50/60 | ||
| Rated current | A | 400 / 630 | ||
| Rated short-circuit withstand/breaking current | kA | 12.5 | ||
| Rated short-circuit making current (peak) | kA | 31.5 | ||
| Rated peak withstand current | kA | 31.5 | ||
| Rated short-circuit time | Sec | 1 | ||
| Power Operating Time (Close/Open) | Sec | ＜2 | ||
| Mechanical Operations | Times | 5000 | ||
| Rated full load operations | Times | 400 | ||
| Power frequency withstand voltage (1 min) | kV | 28/32 | 50/60 | 70/80 |
| Lightning impulse withstand voltage (peak) | kV | 76/85 | 125/145 | 170/190 |
| IP Level | 65 | |||
| Arc Extinction Medium | Times | SF6 Gas | ||
| Insulation Medium | SF6 Gas | |||
| SF6 gas year leak rate | ≤0.5％ | |||
First, urban power grid
Distribution boxes, substations and other places in urban power grids usually need to use sulfur hexafluoride circuit breakers for control and protection of power equipment. The sulfur hexafluoride load switch has the characteristics of explosion-proof and durability, which can ensure the normal operation of the power system, reduce the loss and impact caused by power failures, and ensure the stable supply of power in the city. Second, industrial and mining enterprise power grid
Industrial and mining enterprises usually need to use high-power power equipment, and the control, protection and management of these equipment need to use hexafluoride load switches. In the harsh environment such as high temperature, high humidity and corrosion, the hexafluoride load switch has excellent protection and durability, which can ensure the safe operation of the equipment and improve the production efficiency and economic benefits of industrial and mining enterprises.
Third, the railway traffic grid
Railway traffic network needs to use a lot of power equipment, including traction transformer, traction frequency converter and so on. The sulfur hexafluoride load switch can provide a variety of application methods, which can realize emergency power failure, overload protection and other functions to ensure the operation of power equipment and the normal operation of trains. At the same time, the sulfur hexafluoride load switch has the characteristics of compact and small size, which can adapt to the high-density installation of electrical equipment.
1.Insulation
Because sulfur hexafluoride does not come into contact with wires and has very high insulation strength, electronic devices can be guaranteed to work safely under high voltage conditions.
2. Put out the fire
Sulfur hexafluoride has amazing fire-fighting performance, and in a fire, it can effectively nip the fire in the bud, so as to avoid the expansion of the fire causing greater damage to the equipment.
1. Non-flammable
Because sulfur hexafluoride is an inert gas that does not burn or spontaneously ignite, it is difficult to ignite at high temperatures or high voltages.
2. Good thermal conductivity
Sulfur hexafluoride has good thermal conductivity and can effectively dissipate heat in high temperature or high pressure environments, thus ensuring stable operation of equipment.
