Zhejiang Pingchao Electric Co.,Ltd

Circuit Breaker

Indoor High Voltage VCB

Indoor High Voltage VCB

ZN63(VS1)-24 series handcart type indoor vacuum circuit breaker is rated voltage 24kV, three-phase AC 50Hz indoor high-voltage switchgear, apply for power stations, substations...
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ZN63(VS1)-24 indoor high voltage vacuum circuit breaker

ZN63(VS1)-24 series handcart type indoor vacuum circuit breaker is rated voltage 24kV, three-phase AC 50Hz indoor high-voltage switchgear, apply for power stations, substations, and industrial and mining enterprises to control or protection transmission and distribution systems, specially for the important high altitude breaking load and frequent operation place.

Circuit breaker manufacturing accordance with our national standard GB1984-2003 "AC high voltage circuit breakers", DL/T403-2000 "3.6~40.5kV indoor vacuum circuit breaker ordering technology"; and the related IEC standards and reliable interlock function.

Circuit breaker operating mechanism for the spring energy storage type, can use AC and DC energy storage operations, can also be used manually.

Circuit breaker can be equipped with long life permanent magnetic actuator, mechanical life can reached 60000times, can be used for extremely frequent operation place.

Circuit breaker designed to repackage the structure before and after, both can be used as a fixed installation unit, can also be equipped with the chassis as used in the mounted unit.

 

The Use of Environmental Conditions

1.Ambient Temperature: not higher than +40°C, not less than -15°C.

2.Altitude: not exceed 1000m.

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

4.Earthquake Intensity: not more than 8.

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

6.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

ms

≤50

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

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