VSG-12 indoor high voltage vacuum circuit breaker 12KV MV VCB

KEY WORDS:High pressure vacuum switch

DETAILS

VSG indoor high voltage vacuum circuit breaker (hereinafter referred to as circuit breaker) is used for 12KV power system indoor switching equipment, as power grid equipment, industrial and mining enterprises power design protection and control unit, suitable for switching on and off loads of different nature and frequent operation, multiple times of short circuit current occasions. Product adopts the new type of circuit breaker operating mechanism, a VSG part can adopt international brand enclosed column, the vacuum arcing chamber and main electric circuit parts enclosed into a whole, to protect the arcing chamber from the effects of collision, dust and condensation, environment adaptable, greatly reduces the operation maintenance cost, realize the product a part of free maintenance, operation mechanism and less maintenance; Operation mechanism and circuit breaker body integrated design, through the type test verification, with E2 level electrical life M2 level mechanical life.

the use of environmental conditions

A) Ambient temperature

Maximum temperature: +40C Minimum temperature: -150C

B) Environmental humidity

Daily average relative humidity : < 95%

Monthly average relative humidity : < 90%

Daily average vapor pressure: < 10-2.2 MPa

Monthly mean vapor pressure;  < 1.8 x 10 mpa

C) Altitude: no more than 1000m;

 

 Item

Unit

Data

1

Rated voltage 

kv

12

2

Maximum working voltage

kv

12

3

Rated current 

A

630

1250

630 1250

1600 2000

2500 3150

1250 1600

2000 2500

3150 4000

4

Rated short-circuit break current

kA

20/25

31.5

40

5

Rated short-circuit close current (peak value)

kA

50/63

80

100

6

Rated withstand current (peak value)

kA

50/63

80

100

7

4S Rated little withstand current

kA

20/25

31.5

40

8

Rated insulation level

Industrial frequency withstand voltage

kA

42/48

Thunder impulse 

withstand voltage

75/85

9

Rated operation order

 

Off-0.3S on and off-180S-on and off

10

Mechanical life

times

10000

11

Rated short-circuit current break and close time

times

50

12

Speak and move organization amount assign the current 

of the floodgate(DC)

V

AC.DC.110,220

13

Speak and move organization amount equal to  the current 

of the floodgate(DC)

V

AC.DC 110,220

14

Switching distance of the contact

mm

>11

15

Ultra journey(touches the head spring and compress length)

mm

4+/-0.5

16

Three-phase breaking into  shut 

floodgate sex of the same period 

ms

<2

17

Touch the head and shut a  floodgate of time of bouncing 

ms

<2

18

Average speed of breaking brake 

m/s

0.9~1.2

19

Average speed of closing brake 

m/s

0.5~0.8

20

Time of breaking brake 

Operate it under the 

voltage highest 

s

<0.05

 

Operate it under the 

voltage lowest

<0.08

21

Time of colsing brake 

s

<0.1

22

Each the resistance of main return circuit

u  Ω

<45

23

Allowance abrasion cumulated thickness 

of the moving and stationary contact

mm

3

RETURN

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