VS1-12 indoor drawout circuit breaker 12kv(embedded pole)
VS1-Series embedded pole type of drawout VCB. vacuum circuit breakers are applicable to 12kV, three-phase AC 50Hz indoor switchgear and can serve as protection and control units for industrial and mining establishment transformer substation equipment. With modular and independent-frame design for their spring operating mechanisms, VS1-Series circuit breakers can operate with KYN28-12(24) mid-set and fixed switchgear. These circuit breakers are subject to both fixed installation and assembly with truck as a handcart unit
VS1-Series circuit breaker features high stability and high reliability
In terms of mechanisms, VS1-Series vacuum circuit breakers are given special optimization to transmission parts. Modular spring mechanisms have such advantages as convenient maintenance, short power-off maintenance, high versatility of parts, and boast better compatibility with vacuum interrupters which greatly improves the technical parameters and delivers more excellent performance.
High-performance oil buffer
High-performance breaking buffer can markedly reduce the overshoot and rebounding amplitudes of the moving contact of a vacuum circuit breaker in breaking thus avoiding the loss of mechanical endurance due to partial over fatigue of vacuum interrupter bellows resulting from moving contact overshoot. As the rebounding amplitudes of the moving contact reduces, No re-ignition and restrike is found during the switching capacitor bank test
Technical parameter:
|
NO |
Item |
Units |
Technical parameters |
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|
1 |
Rated voltage |
kV |
12 |
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|
2 |
Maximum working voltage |
kV |
12 |
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|
3 |
Rated current |
A |
630/1250 |
630/1250 |
630/1250/1600 |
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|
4 |
Rated short-circuit breaking current |
kA |
20 |
25 |
31.5 |
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|
5 |
Rated short circuit closing current |
kA |
50 |
63 |
80 |
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|
6 |
Rated peak withstand current |
kA |
50 |
63 |
80 |
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|
7 |
4S rated short circuit withstand current |
kA |
20 |
25 |
31.5 |
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|
8
|
Rated insulation level |
Power frequency withstand voltage |
kV
|
42(Fracture:48)
|
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|
Impact withstand voltage |
75(Fracture:84) |
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|
9 |
Rated operation sequence |
0-0.3s-Co-180s-Co |
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|
10 |
Mechanical life |
times |
10000 |
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|
11 |
Rated short circuit current breaking times |
times |
50 |
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|
12 |
Operating mechanism rated closing voltage |
V |
AC/DC 110,220 |
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|
13 |
Operating mechanism rated trip voltage |
V |
AC/DC 110,200 |
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|
14 |
Moving contactor travel |
mm |
11±1 |
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|
15 |
Moving contactor over-travel |
mm |
3.5±0.5 |
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|
16 |
Three-phase split and close bounce time |
ms |
≤2 |
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|
17 |
Contact closing bounce time |
ms |
≤2 |
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|
18 |
Average opening speed |
m/s |
1.2±0.2 |
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|
19 |
Average closing speed |
m/s |
0.6±0.2 |
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|
20 |
Opening time |
Under max operation voltage |
s |
≤0.05 |
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|
Under min operation voltage |
≤0.08 |
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|
21 |
Closing time |
S |
0.1 |
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|
22 |
Main loop resistance of each phase |
μΩ |
60 |
50 |
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|
23 |
Dynamic and static contacts allow wear cumulative thickness |
mm |
3 |
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