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Indoor High Voltage Vacuum Circuit Breaker
VTZG-12M
1.General Description
VTZG-12M fixed type indoor HV vacuum breaker is widely used for kinds
of switchgears such as KYN28-12 orXGN-12.It is widely used for I2k
V voltage systems which is accordance with G81984-2003 standards.
Structural characteristics:
1.The vacuum circuit breaker adopts air insulation.which meet air distance and creepage under normal run condition.
2.The operating mechanism is used VTZ type mechanism,the outlet curve has good adaptation for requirement of vacuum interrupters.It owns high reliable ,long life and easy maintenance.
3.Suitable for varies sites and work places which have rigorous run condition.especially suit for re-construction of old-fashioned oil switch.
2.Applying conditions:
Ambient temperature;-10℃----+40℃
Relative humidity:daily average ≤95%,monthly average ≤90%
Seismic intensity :≤8
Saturated vapor pressure:daily average ≤2.2kPa,monthly average≤1.8kPa;
Altitude:≤1000m;(Not including special requirement)
Service environment:should be avoided fire, explosion risk, serious pollution, chemical corrosion and violent vibration
3.Technical specification:
No. | Item | Unit | Data | |||||
1 | Rated voltage | kV | 12 | |||||
2 | Rated frequency | Hz | 50/60 | |||||
3 | Rated power frequency withstand voltage/1min | kV | 42 | |||||
4 | Rated lighting impulse withstand voltage | kV | 75 | |||||
5 | Rated current | A | 630 | 1250 | 1600 | 2000 | 2500 | 3150 |
6 | Rated short circuit breaking current Rated short time withstand current(4s) | kA | 20 | |||||
25 | 25 | |||||||
31.5 | 31.5 | 31.5 | 31.5 | |||||
40 | 40 | 40 | 40 | |||||
7 | Rated short circuit making current(peak) Rated withstand current(peak) | kA | 50 | |||||
63 | 63 | |||||||
80 | 80 | 80 | 80 | 80 | ||||
100 | 100 | 100 | 100 | 100 | ||||
8 | Mechanical life | Times | 10000 | |||||
9 | Rated duration of short circuit | s | 4 | |||||
10 | Rated operating sequence | O-0.3s-CO-180s-CO | ||||||
O-180s-CO-180s-CO(40kA以上) | ||||||||
11 | Rated short circuit breaking times | Times | 30 | |||||
12* | Rated single capacitor bank breaking current | A | 400 | |||||
13* | Rated back to back capacitor bank breaking current | A | 400 | |||||
14 | Clearance between open contacts | mm | 11 ± 1 | |||||
15 | Over-travel of contact | mm | 3.5 ± 1 | |||||
16 | Opening &closing simultaneity of 3 phase contact | ms | ≤ 2 | |||||
17 | Bounce time of contact closed | ms | ≤ 2 | |||||
18 | Closing time | ms | 50~100 | |||||
19 | Opening time | ms | 20~60 | |||||
20 | Average closing speed | ms | 0.6 ± 0.2 | |||||
21 | Average opening speed | m/s | 1.1 ± 0.2 | |||||
22 | Max DC component | 50% |