Application of 24KV SF6 Gas Load Breaker Switch
The SF6 gas-insulated switch is a three-phase interoperable switching device designed for use in distribution system cabling and overhead power line segment applications.
It can be operated manually in the field or remotely from the control center.
Technical parameters of 24KV SF6 Gas Load Breaker Switch
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Products Type
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FWX-24
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Basic Ratings
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Maximum System Voltage
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24kV
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Rated Continuous Current
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630A
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Rated Frequency
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50/60Hz
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Short Time Withstand Current
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16kA/1sec
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Making and Breaking Capacity
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Mainly Active Load Current
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630A
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Number of Load-break Operations
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400times
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Short-circuit Making Current (peak)
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40kA
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Number of Making Operations
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5 times
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Cable Charging Current
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25A
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Line Charging Current
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1.5A
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Closed Loop Circuit Current
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630A
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Transformer Magnetizing Current
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22A
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Power Frequency Withstand Current Test
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Wet Condition-10sec Ph- Ph-Eth, Across Interrupters
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50kV
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DryCondition-1min，Ph- Ph, Phase to Earth
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64kV
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Dry Condition - 1 min Across Interrupter
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79kV
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Impulse Withstand Current Test( 1.2 x 50 µs )
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Phase to Phase, Phase to Earth
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125kV
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Across Interrupter
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145kV
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Other Ratings & Specifications
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Internal Arc Test
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20kA /0.1 sec
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Arc Extinction Medium
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SF6 Gas
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Insulation Medium
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SF6 Gas
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Creepage Distance (Porcelain)
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700mm
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Creepage Distance (Silicon)
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1200mm
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Dry arcing distance
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≥
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IP Level
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65
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Operation Performance
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Closing/Opening Time
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＜1sec
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Mechanical Operations (Guaranteed)
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10000times
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Operating Temperature (*Manual Type)
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-25～+70℃
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Gas Pressure
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Nominal Pressure (MPa, at 20°C)
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0.07
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Bursting Pressure (MPa)
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0.4～0.6
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Minimum Gas Pressure (MPa)
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0.05
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Leakage Rate (cc/ sec)
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≤0.5%
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Voltage sensors
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CT ABC 10P10 5VA
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400:05:00
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Incoming side and outgoing side of the voltage sensor
6 Voltage sensor（built-in）
Phase voltage：（24（36）kV/√3）/（3.25V/√3）
Special attention should be paid to the voltage sensor, which must be directly fed by the switch.
No additional adjustment circuit can be added to the controller. The voltage signal of the switch into the test line needs to be tested separately.
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