12KV/24KV/36kV LBS Indoor High Voltage SF6 Gas Load Break Switch （switch disconnector）
12KV/24KV/36kV LBS Indoor High Voltage SF6 Gas Load Break Switch （switch disconnector）
Indoor high-voltage SF6 load break switch is widely used in the 11~36kV electric power distribution systems.
Application
Indoor high-voltage SF6 load break switch is widely used in 11~36kV electric power distribution system , adopted with SF6 gas as an arc-extinguishing and insulation medium, including the three contactors for switching-on and switching-off and to-ground, and is characteristic in its small volume, its convenient installation and operation and its the great adaptability with surroundings.
Indoor high-voltage SF6 load break switch and SF6 load break switch plus fuse combination can function to protect and control the electric equipments for power supply and transformer substations especially being suitable for ring net cabinet, cable branch cabinet and distribution switching substation. indoor high-voltage SF6 load switch and SF6 load break switch plus fuse combination are complied with the standards of IEC60265-1-1998, IEC60420 etc.
Specifications
Service environment
a)Air temperature
Maximum temperature: +40℃; Minimum temperature:-35℃
b)Humidity
Monthly average humidity 95%; Daily average humidity 90% .
c)Altitude above sea level
Maximum installation altitude: 2500m
d)Ambient air not apparently polluted by corrosive and flammable gas, vapor etc.
e)No frequent violent shake
Parameter
| 1 | Rated voltage | kV | 12 | 24 | 12 | 24 | 36 | 40.5 | ||
| 2 | Rated frequency | Hz | 50/60 | 50/60 | 50/60 | |||||
| 3 | Rated current | A | 630/800 | 630/800 | 630/800 | |||||
| 4 | 1min Power frequency withstand voltage
| wet | kV | 38 | 50 | 38 | 50 | 70 | 80 | |
| dry | kV | 48 | 60 | 48 | 60 | |||||
| 5 | Lightning impulse withstand voltage | kV | 75 | 125/150 | 75 | 125/150 | 170 | 185 | ||
| 6 | Rated short circuit breaking current (peak) | kA | N/A | N/A | N/A | N/A | N/A | N/A | ||
| 7 | Rated active load and close circuit breaking current | A | 630 | 630 | 630 | 630 | 630 | 630 | ||
| 8 | Rated transferring current | A | 1700 | 1200 | 1700 | 1200 | 800 | 800 | ||
| 9 | Rated short circuit making current (peak) | kA | 50 | 40 | 50 | 40 | 40 | 40 | ||
| 10 | Rated cable(line) charging breaking current | A | 50 and 10 | 50 and 10 | 50 and 10 | |||||
| 11 | Cable charge breaking current in earthing fault | A | 20 | 20 | 20 | 20 | 20 | 20 | ||
| 12 | Rated withstand current (peak) | kA | 50 | 40 | 50 | 40 | 40 | 40 | ||
| 13 | Short time withstand current (2s) | kA | 31.5 | 25 | 31.5 | 25 | 20 | 20 | ||
| 14 | Mechanism life | times | 5000 | 5000 | 5000 | 5000 | 2000 | 2000 | ||
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