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33KV SF6 Gas Load Break Switch

Application of 33kv auto recloser

The 33kvpole mounted switchis made of a proven rugged, corrosion-resistant material (304L stainless steel plate for warships), ensuring a long service life (30 years) and a range of operations, with the characteristics ideal for on-column equipment.

Technical Parameters of load break switch 33kv

Products Type

FWX-36

Basic Ratings

Maximum System Voltage

36kV

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

Closed Loop Circuit Current

630A

Transformer Magnetizing Current

22A

Power Frequency Withstand Current Test

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

70kV

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

95kV

Dry Condition - 1 min Across Interrupter

110kV

Impulse Withstand Current Test( 1.2 x 50 µs )

Phase to Phase, Phase to Earth

195kV

Across Interrupter

215kV

Other Ratings & Specifications

Internal Arc Test

20kA / 0.1 sec

Arc Extinction Medium

SF6 Gas

Insulation Medium

SF6 Gas

Creepage Distance (Porcelain)

1055mm

Creepage Distance (Silicon)

1550mm

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)

Bursting Pressure (MPa)

  1. ~0.6

Minimum Gas Pressure (MPa)

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 33KVload break interrupter switch.

No additional adjustment circuit can be added to the controller. The voltage signal of the 33kv load break switch into the test line needs to be tested separately.

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