24kV SF6 load break switch is a switch equipment for medium voltage switchgear, using SF6 gas as arc extinguishing and insulating medium. Rate voltage was 24kV, rate current was630A

LBS 24KV 630a SF6 Gas Load Break Switch Application

The SF6 LBS 24kv 630A gas-insulated switch is a three-phase interoperable switching device designed for use in distribution system cabling and overhead power line segment applications.

The 24KV pole mounted disconnect switch can be operated manually in the field or remotely from the control center.

LBS 24KV 630a SF6 Gas Load Break Switch Technical Parameters

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.

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