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Description

Summary:

ZW32-12 outdoor high voltage vacuum circuit breaker (hereinafter referred to as "circuit breaker") is an outdoor distribution switchgear with rated voltage of 12kV and three-phase AC of 50Hz. The circuit breaker is mainly used for breaking and closing the load current, overload current and short circuit current in the power line. It has overload and short circuit protection function, meets the requirements of control and measurement, and can also realize remote control and monitoring function. It is widely used in substation, industrial and mining enterprise distribution system as control and operation, especially suitable for frequent operation places.

The circuit breaker meets the technical standards of gb1984-2003, DL / T 402-2007 and iec60056.

 

Structural features:

The overall structure is three-phase pillar dry structure;

Fully enclosed structure, good sealing performance, good moisture-proof and anti condensation performance, suitable for high temperature and humid areas;

Vacuum arc extinguishing is adopted for reliable insulation;

The opening and closing performance is reliable, and there is no danger of combustion and explosion;

Small size, light weight, maintenance free, long service life;

It can be operated manually, electrically or remotely;

The operating mechanism is sealed at the bottom of the switch box, which can effectively avoid the corrosion of the switch caused by long-term outdoor environment;

The restless mechanism has the advantages of novel design, simple structure, reliable dynamic performance, small volume, and its service life can reach 10000 times.

 

Model meaning:

 

Main technical parameters:

No

Name

Unit

Data

1

Rated voltage

kV

12

2

Rated current

A

630

1250

3

Rated frequency

Hz

50

4

Rated insulation level

1min power

 

frequency

 

withstand voltage

Dry test

 

42/48(fracture)

Wet test

34

Secondary circuit to ground

2

Lightning impulse withstand voltage

 

 

(peak value)

75/85(fracture)

 

 

 

 

5

Rated short circuit making current (peak value)

 

 

kA

50

63

6

Rated short time withstand current

 

 

kA

20

25

7

Rated peak withstand current

kA

50

63

8

Breaking times of rated short circuit breaking current

 

 

30

9

Rated short circuit duration

 

s

4

10

Rated operating voltage and rated voltage of auxiliary circuit

 

 

 

V

DC220、AC220
、AC/DC220

11

Rated operation sequence

 

Off-0.3s-on-off-180s-on-off

12

Rated current of over current trip

A

5

13

Mechanical life

second

10000

14

Allowable wear accumulative thickness of moving and static contacts

 

 

 

mm

3

15

Rated current of over current release

 

A

5

16

Current ratio of current transformer

 

 

    200/5   
    400/5   
  600/5

17

Contact opening distance

mm

9±1

18

Contact overtravel

mm

2±0.5

19

Average opening speed

m/s

1.2±0.3

20

Average closing speed

m/s

0.6±0.2

21

Opening time

ms

≤40

22

Closing time

ms

20~45

23

Closing bounce time

ms

≤2

24

Asynchrony of three phase closing and opening

 

 

 

mm

≤2

25

Three phase circuit resistance

μΩ

≤80   
 Band isolation≤120

 

Outline and installation dimensions: