Zhejiang Pingchao Electric Co.,Ltd

Circuit Breaker

Outdoor Vacuum Circuit Breaker Switch CBS

Outdoor Vacuum Circuit Breaker Switch CBS

ZW8-12 series outdoor high voltage vacuum circuit breaker, with rated voltage 12kV and AC three-phase frequency of 50HZ, is mainly applied to close and break load current, overload current and short-circuit current in country power net...
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ZW8-12 outdoor high voltage vacuum circuit breaker

Summary
ZW8-12 series outdoor high voltage vacuum circuit breaker, with rated voltage 12kV and AC three-phase frequency of 50HZ, is mainly applied to close and break load current, overload current and short-circuit current in country power net, city power net and small- type power system. The breaker adopts the structure of three phases in one box. Three -phase arc-extinguishing chamber is inside the metal box. SMC material, which has the advantages of high insulating strength and reliable performance, is used to insulate phase-to- phase and phase-to-earth.

 

Specifications

No

Item

Unit

Data

1

Rated voltage

kV

 

24

 

2

Max working voltage

kV

 

24

 

3

Rated current

A

630,1000,1250

1250,1600,2000,2500

1250,1600,2000,3150

4

Rated short-circuit opening current

kA

20/25

31.5

40

5

Rated short-circuit closing current

kA

50/63

80

100

6

Rated peak withstand current

kA

50/63

80

100

7

4s rated short-time withstand current

kA

20

31.5

40

8

Rated
  Insulating
  Level

Power frequency withstand voltage
  (before and after rated breaking)

kV

42(fracture 48)

Impulse withstand voltage
  (before and after rated breaking)

kV

75(fracture 85)

9

Rated operating sequence

 

O-0.3 s-C&O-180s-C&O

10

Mechanical life endurance

time

10000

11

Rated short-circuit opening current   frequency

time

50

12

Rated closing voltage of operating   mechanism(DC)

V

110,220

13

Rated closing voltage of operating   mechanism(DC)

V

110,220

14

Open contact clearance

mm

11±1

15

Super stroke(compressed length of contact   springs)

mm

3.5 ±  0.5

16

Time differential among phases for   opening and closing

ms

≤2

17

Bounce time of closing contacts

ms

≤2

18

Average opening speed

ms

0.9~1.2

19

Average closing speed

ms

0.5~0.8

20

Opening time

Under maximum operating voltage

ms

15~50

Under minimum operating voltage

ms

30~60

21

Closing time

ms

≤100

22

Main loop resistance of each phase

μΩ

≤50   (630A)≤45(1250A)≤35(1600-2000A)≤25(2500A以上)

23

Allowed accumulative wearing thickness of   static&Moving contact

mm

3

 

FAQ:

Why choose pingchao Electric

Here at Pingchao Electric Company,Promise customer satisfaction and guarantee first-class service. With over 5 years of business experience,we guarantee that our products are of the highest quality and reasonable price. 

What are our services?

We manufacture 12kV, 24kV, 40.5kV switchgear fittings,Mainly earthing switches, interlocking devices, Vacumm circuit breaker,chassis trucks,copper contact,contact box ect. 

How are the quality of our products guaranteed?

Each product produced by us will be 100% checked before delivery.If Any defective goods occurred,which will be returned free and be changed for new one.

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