ZW8-12 Outdoor 12KV MV VCB high voltage vacuum circuit breaker

KEY WORDS:High pressure vacuum switch

DETAILS

The ZW8-12 high-voltage vacuum circuit breaker combines the world’s latest permanent magnet mechanism and epoxy resin integral casting solid insulation technology and other advanced technologies, and adopts vacuum breaking technology, which has long electrical life, reliable breaking and long-term complete immunity. Maintenance features:The product has many advantages such as small size, light weight, convenient operation, reliable operation, pollution-free, and maintenance-free.

Use environment

1.Ambient temperature: not higher than +40 °C, not less than -40°C

2. Altitude: not exceed 2000m.

3. Relative humidity: daily average of not more than 95%, month average of not more than 90%.

saturated vapor pressure daily average of not more than 2.2 × 103MPa, month average not more than 1.8 × 103MPa.

4. Earthquake intensity: not more than eight.

5. No fire, explosion hazard, serious filthy, chemical corrosion, as well as places of intense vibration.

Item

Description

Unit

Data

1

Rated voltage

KV

12

2

Rated current

A

630(1250)

3

Rated short circuit breaking current

KA

20/25/31.5

4

Rated short circuit making current

KA

16/31.5/50

5

Rated peak withstand current

KA

16/31.5/50

6

4S Rated withstand current

KA

6.3/12.5/20

7

Rated insulation level

 frequency withstand voltage

 

42

Impulse withstand voltage

75

8

Rated operating sequence

 

O-0.3s-CO-180S-CO

9

Mechanical life

Times

10000

10

Rated short circuit  current breaking time

Times

30

11

Rated close brake voltage of operating machine

V

AC DC110,220

12

Rated break brake voltage of operating machine

V

AC DC110,220

13

Contact stroke

mm

11±1

14

Exceed range(the compress length of contact spring)

mm

3.5±0.5

15

Different period of three-phase break and close break

ms

≤2

16

The jump time of contact close break

ms

≤2

17

Average break speed

m/s

0.9~1.5

18

Average closing speed

m/s

0.4~0.8

19

Closing time

s

0.1

20

Contacts limit

mm

3

 

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