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TZFZN25-12D
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TZFZN25-12D  Indoor AC high-voltage vacuum load switch & fuse combination units




  Summary

TZFZN25-12D/T630-20 Indoor AC high-voltage vacuum load switch is three-phase/AC/ 50Hz/ 12Kv(Rated voltage) in indoor mechanism. Applicable to the industrial enterprise substation and other transformer substation. As the protection and control of electrical facilities, used to open/close load currentclosed loop currentno-load transformer and cable charging current.

 

 Summary

TZFZRN25-12D/T200-31.5 Indoor AC high-voltage vacuum load switch- fuse

combination units is three-phase/AC/ 50Hz/ 12Kv(Rated voltage) in indoor mechanism. Applicable to the industrial enterprise substation and other transformer substation. Make the use of the load control and short circuit protection.

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

TZFZN25-12DIndoor AC high-voltage vacuum load switch and TZFZRN25-12DIndoor AC high-voltage vacuum load switch- fuse combination units is three-phase/AC/ 50Hz/ 12Kv control and protection of  power distribution system. Applicable to the industrial enterprise and city building substation. Combination units is reliable than circuit breaker for transformer ect.  electrical equipment’s protect. Especially conform to looped networkdouble laying power supply unit and combined substation.

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

1、This product used the vacuum interrupter, the function’s stable and reliable, the electric life’s long, the breaking number’s high, the closing and breaking ability is better,operation and maintenance is simple.

2、The combine switch body and the operating mechanism. Together with the disconnecting switch,the load switch and the earthing switch. The structure’s compact, the volume’s small.

3、The straight moving type isolated fracture and the vacuum interrupter are arranged in series, and the dynamic and heat stable current parameters are high; the distinctive operation procedure is connected , with one-time finished the operation.

4、Cone-shaped silent contactinsulation cover and valve structure, static contact, completely separate from the bus bar and load switch unit.

5、Vacuum load switchearthing switchvalveswitch cabinet door, strictly according to the " five prevention " mechanical interlocking, to prevent wrong operation, safe and reliable.

6、The spring operating mechanism can be manual and electric, easy to achieve the three remote control requirements of power system.

7、Switching operation power supply can be AC and DC.

8、Conventional type of switch for side around operation, but also according to user needs to provide a positive operation.

     9Product comply with the standards GB3804 and GB16926 and so on. .

 

 

  Technical Data

No.

Item

Unit

Data

TZFZN25-12D/T630-20

TZFZRN-12D/T200-31.5

1

Rated voltage

kV

12

2

Rated current

A

630,≤200

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

-

2000

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

10000








 

 

FZN25-12D Side right operation




FZN25-12D Side left operation




FZRN25-12D Side right operation




FZRN25-12D Side left operation





Electrical schematic diagram