24KV SF6 Gas Load Break Switch

Products Type

FWX-24

Basic Ratings

Maximum System Voltage

24kV

Rated Continuous Current

630A

Rated Frequency

50/60Hz

Short Time Withstand Current

16kA/1sec

Making and Breaking Capacity

Mainly Active Load Current

630A

Number of Load-break Operations

400times

Short-circuit Making Current (peak)

40kA

Number of Making Operations

5 times

Cable Charging Current

25A

Line Charging Current

1.5A

Closed Loop Circuit Current

630A

Transformer Magnetizing Current

22A

Power Frequency Withstand Current Test

Wet Condition-10sec Ph- Ph-Eth, Across Interrupters

50kV

DryCondition-1min，Ph- Ph, Phase to Earth

64kV

Dry Condition - 1 min Across Interrupter

79kV

Impulse Withstand Current Test( 1.2 x 50 µs )

Phase to Phase, Phase to Earth

125kV

Across Interrupter

145kV

Other Ratings & Specifications

Internal Arc Test

20kA /0.1 sec

Arc Extinction Medium

SF6 Gas

Insulation Medium

SF6 Gas

Creepage Distance (Porcelain)

700mm

Creepage Distance (Silicon)

1200mm

Dry arcing distance

≥

IP Level

65

Operation Performance

Closing/Opening Time

＜1sec

Mechanical Operations (Guaranteed)

10000times

Operating Temperature (*Manual Type)

-25～+70℃

Gas Pressure

Nominal Pressure (MPa, at 20°C)

0.07

Bursting Pressure (MPa)

0.4～0.6

Minimum Gas Pressure (MPa)

0.05

Leakage Rate (cc/ sec)

≤0.5%

Voltage sensors

CT ABC 10P10 5VA

400:05:00

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 LBS load break 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.