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TZFKRN12A-12D
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TZFKN12A-12DIndoor AC high-voltage compressed-air load switch&fuse combination units



Summary

TZFKN12A-12D/T125-31.5 Indoor AC high-voltage compressed-air load switch

is three-phase/AC/ 50Hz/ 12KV mechanism. It is widely used for open&close load current,closed loop current,no-load transformer ,cable charging current and breaking current.Equipped with manual and motor operating mechanism to easy achieve 3 remote control requirement.

 

Summary

 

TZFKRN12A-12D/T125-31.5 AC high-voltage compressed-air load switch- fuse

combination unit is a combined device of TZKN12A-120 load Switch and LAJ-12(XRNT-12)HV current limiting fuse,which can break any over current between work current and short-circuit current.Load switch can be opened by impactor while load switch need break current.Equipped with earthing switch of closing short-circuit current capacity.Operating mechanism can be manual and electric, easy to achieve the three remote control requirements of power system.

 

The main purpose

TZFKN12A-12D/T630-20 compressed-gas load switch is a transformer ,cable and overhead line’s control and protection device for 12KV& under 3phase power distribution system,which are widely used in urban network , rural terminal power distribution station and box-type substation,especially in looped network system and double radiation electric supply system.

TZFKN12A-12D/T630-20 compressed-gas load switch can make and break load current and over current.

 TZFKN12A-12D/T630-20 compressed-gas load switch is a transformer ,cable and overhead line’s control and protection device for 12KV& under 3phase power distribution system,which are widely used in urban network , rural terminal power distribution station and box-type substation,especially in looped network system and double radiation electric supply system.

 

TZFKN12A-12D/T630-20 compressed-gas load switch can make and break load current and over current.

 Using the environment conditions

1、Ambient air temperatureupper limit +40℃;lower limit -25℃(Allows storage and transportation when - 30 ℃)

2、Above sea level:≤1000m

3、Relative air humidity: Daily Average AH would not be more than 95%; Monthly Average AH would not be more than 90%

4、Earthquake intensity should not be greater than 8 degrees.

5、The air around is not corrosive or flammable gas, water vapor and other obvious pollution

6、No frequent quake violently place.

7、Pollution grade:

  Structure features

Structural characteristics:

1.Integrated switchgear main parts,disconnecting switch,load switch and earthing switch into a whole,compact structure and small volume.

2. Rectilinear motion isolating fracture and vacuum arc-extinguishing chamber in tandem arrangement ,high dynamic & thermal current,select unique linked operation to complete by one time.

   3.Use tapered static contact,insulating cover and shutter to thoroughly split busbar and load switch unit.

4.Interlock Vacuum load switch,earthing switch ,shutter and cabinet door according to five prevention requirement in order to prevent incorrect operation.

5.Spring stored energy mechanism is operated by electric and manual to easy achieve remote control.

6. Opening or closing of Power supply can be controlled by AC or DC.

 

 

 

Technical Data

No.

Item

Unit

Data

TZFKN25-12D/T630-20

TZFKRN-12D/T125-31.5

1

Rated voltage

kV

12

2

Rated current

A

630,125

3

Rated frequency

Hz

50

4

Rated

1min   power frequency

kV

Earth,phase 42;isolation   clearance 48

withstand voltage

kV

Earth,phase 75;isolation   clearance 85

5

Rated short time withstanding   current

kA

20

-

6

Rated short-circuit duration   time

S

4

-

7

Rated Peak withstand current

kA

50

-

8

Power load breaking current

A

630

-

9

Close loop breaking current

A

630

-

10

Breaking cable charge current

A

10

-

11

Breaking no-load transformer   capacity

kVA

1600

12

Rated short-circuit breaking   current

kA

-

31.5

13

Short-circuit breaking current

A

-

125

14

Fuse type


-

SDLAJ-12,SFLAJ-12

15

Shocking input energy

J

-

1+0.5

16

Rated short-circuit making   current

kA

50

-

17

Earthing switch rated withstand   current

kA

20

-

18

Earthing switch 4S rated   short-time withstand current

S

2

19

Auxiliary circuit rated voltage

V

AC/DC220,AC/DC110

20

Mechanical life

2000








 

 

 

TZFKRN12-12D Side right operation




TZFKRN12-12D Side left operation




TZFKRN12-12D Side right operation




TZFKRN12-12D Side left operation




Electrical schematic diagram









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