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VTZG-12M
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Indoor High Voltage Vacuum Circuit Breaker

VTZG-12M


VTZ-12PM.jpg


1.General  Description

    VTZG-12M fixed type indoor HV vacuum breaker is widely used for kinds

of switchgears  such  as KYN28-12 orXGN-12.It is widely used for I2k

V voltage systems which is accordance with  G81984-2003 standards.

Structural characteristics:

1.The vacuum circuit breaker adopts air insulation.which meet air distance and creepage under normal run condition.

2.The operating mechanism is used VTZ type mechanism,the outlet curve has good adaptation for requirement of vacuum interrupters.It owns high reliable ,long life and easy  maintenance.

3.Suitable for varies sites and work places which have rigorous run condition.especially suit for  re-construction of old-fashioned oil switch.

2.Applying  conditions:

Ambient temperature;-10----+40

Relative humidity:daily average ≤95%,monthly average ≤90%

Seismic intensity ≤8

Saturated vapor pressuredaily average ≤2.2kPamonthly average≤1.8kPa

Altitude:≤1000m;(Not including special requirement

Service environmentshould be avoided fire, explosion risk, serious pollution, chemical corrosion and violent vibration

3.Technical specification

No.

Item

Unit

Data

1

Rated voltage

kV

12

2

Rated frequency

Hz

50/60

3

Rated power frequency withstand voltage/1min

kV

42

4

Rated lighting impulse withstand voltage

kV

75

5

Rated current

A

630

1250

1600

2000

2500

3150

6

Rated short circuit breaking current          Rated short time withstand current(4s) 

kA

20






25

25






31.5

31.5

31.5

31.5




40

40

40

40

7

Rated short circuit making current(peak)       Rated withstand current(peak)

kA

50






63

63





80

80

80

80

80



100

100

100

100

100

8

Mechanical life

Times

10000

9

Rated duration of short circuit

s

4

10

Rated operating sequence


O-0.3s-CO-180s-CO

O-180s-CO-180s-CO(40kA以上)

11

Rated short circuit breaking times

Times

30

12*

Rated single capacitor bank breaking current

A

400

13*

Rated back to back capacitor bank breaking current

A

400

14

Clearance between open contacts

mm

11 ± 1

15

Over-travel of contact

mm

3.5 ± 1

16

Opening &closing simultaneity of 3 phase contact

ms

≤ 2

17

Bounce time of contact closed

ms

≤ 2

18

Closing time 

ms

50~100

19

Opening time

ms

20~60

20

Average closing speed

ms

0.6 ± 0.2

21

Average opening speed   

m/s

1.1 ± 0.2

22

Max DC component


50%

 



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