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
|
|
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