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CKFL Gas Insulated Switchgear


CKFL-12 series of GIS has advantages of compact structure, full sealing, full insulation, long lifetime, maintenance free, small occupation, reliable safety and not affected by the environment. It is widely used in industrial and civil cable network and terminal power supply. Especially applicable for small secondary distribution substation, switching station, industrial enterprise, airport, railway, commercial zone, high building, high speed road, subway and tunnel etc.

CKFL-12 series of gas tank is made of stainless steel plate, sealed and welded by laser cutting and automatic robot. The protection class is IP67. All live parts are sealed in SF6 gas tank, and it also passed synchronous vacuum & helium leak test. At the bottom of the gas tank there has an explosion-proof vent, which is equipped with explosion-proof membrane. In the case of the gas pressure exceeds certain threshold; it can release the pressure from the explosion-proof vent, which effectively prevent the harm from the high pressure gas. 





product overview

It can contain 6 modules in one SF6 gas-insulated tank at most, and each module has its own function. For system with more than 6 modules, the switchgear may be used external busbar connector to connect every two modules or more to obtain full project configuration.

technical parameters

Technical Data

Unit

Module C

Module F

Module V


Load switch

Switch-fuse combination

Vacuum switch

Disconnector/ earthing switch


Rated voltage

kV

12

24

12

24

12

24

12

24


Rated frequency

Hz

50

50

50

50


Rated current

A

630

125

630

630


Rated breaking cable charging current

A

20

20

/

/


Rated short-circuit making current(peak)

kA

50

Up to fuse

50

40

50

40

Rated short-circuit breaking current

kA

/

Up to fuse

20

16

/

/

Rated short-time withstand current

kA

20

/

20

16

20

16

Rated short-time withstand current duration(main circuit)

s

4

/

4

4

4

4

Rated short-time withstand current duration(ground loop)

s

2

/

/

/


Rated breaking transfer current

A

/

1600

/

/


Rated short-time power frequency withstand voltage

phase-to-phase phase-to-earth

kV/1 min

42

50

42

50

42

50

42

50

open contact

kV/ 1 min

48

65

48

65

48

65

48

65

Rated lightning impulse withstand voltage

phase-to-phase phase-to-earth

kV

75

95

75

95

75

95

75

95

open contact

kV

85

110

85

110

85

110

85

110

Mechanical life

times

5000

5000

5000

5000

Mechanical life of earthing switch

times

≥2000

≥2000

≥2000

≥2000

SF6 pressure in seal enclosure

Mpa

0。040-0。045

0.040-0.045

0.040-0.045

0。040-0。045

SF6 annual leakage rate SF6

/

≤0.02%

≤0。02%

≤0.02%

≤0.02%

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