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We are the supplier and exporter of low & medium voltage electric equipements: Electric Connectors, Industrial Plugs, XAC Pendent Pushbutton Switches, APP SB Power Connectors ,Contacts,Split Core Transformer, Clamp Transformer, Distribution box, LED Lampes. And crane parts: Electirc Hoist, Terminal Blocks, COB,XAC Pendant Control Stations, Crane Overload Detector, Cut off limit..

VT11 12kv Indoor AC HV permanent magnet circuit breaker

VT11-12kv Indoor AC HV permanent magnet circuit breaker

 This VT11 12kv Indoor AC HV permanent magnet circuit breaker is equipment with three-phase Ac of 50HZ and rated voltage of 12KV, can be used to protect and operate the apparatuses in the industrial and mining enterprises, power plants and substations, especially in the workplaces that require no oil, little maintenance and long service life.  VT11-12 can be equipped in the fixed type switchgears, two-layer switchgears and mid-mounted ones.

Features :
      a. The power of the permanent magnet can keep the position the opening and closing switch; no equipment used for accumulating or keeping the state of closing switch; components and parts are worn down by hand
      b. No maintenance realized by the technology of resin sealing
      c. Intellectual control, little replacement parts, simple and reliable mechanic transmission
      d. Fewer requirements on the operative current, wide arrangement of voltage
      e. Releasing by electron, high reliability on action 
      f. Fewer quick-worn parts, longer service life

Type designation :

Technical parameter :

NO

Name

Unit

Data

1

Rated voltage

KV

12

2

Rated insulating level

Rated 1min power frequency withstand voltage

KV

 

Lightning impulse withstand voltage

3

Rated frequency

Hz

50

4

Rated current

A

630 1250 1600 2000 2500 3150

5

Rated short-circuit breaking current(R.M.S)

KA

20 25 31.5 40

6

Rated short-circuit making current(crest)

KA

50 63 80 100

7

Rated withstand current (4s)(R.M.S)

KA

20 25 31.5 40

8

Rated peak withstand current(crest)

KA

50 63 80 100

9

Rated short-circuit breaking times

Times

50

10

Mechanical Endurance

Times

50000(mechanism100000)

11

Rated operative sequence

 

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

12

The rated single condenser group breaking current

A

630

13

The rated back-to- back condenser group breaking current

A

400

14

Secondary operative current

V

80-264 AC/DC

15

The shortest charging time

S

<=10

16

The charge current in condenser(peak value)

A

2

17

Allowance worn thickness of moving contact

Mm

<=2

18

Opening clearance of contact

Mm

11+(-)1

19

Contact travel

Mm

3+(-)1

20

Average opening speed

M/s

1.1+(-)0.1

21

Average closing speed