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VTZ-24 Solid-enclosed Indoor High Voltage Vacuu Circuit Breaker
1.General Description
VTZ-24 Solid-enclosed Indoor High Voltage Vacuum Circuit Breaker is widely used for
3phase AC 50(60)HZ and 24KV indoor device,which is used for protecting and controlling electrical equipment in fields of industry&mining enterprise. power plants and substation.
Adopt embedded poles in main circuit,modularized mechanism ,integrated stored energy
hand shank and reasonable whole structure Meanwhile,it own long mechanical life,excellent breaking property and strong suitability.
Equipped with fuse handcart,disconnector handcart and voltage transformer handcart.
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 | 24 | ||||||
2 | Rated frequency | Hz | 50/60 | ||||||
3 | Rated insulation levels | Rated power frequency withstand voltage/1min | kV | 65 | |||||
Rated lighting impulse withstand voltage | kV | 125 | |||||||
4 | Rated current | A | 630 | 1250 | 1600 | 2000 | 2500 | 3150 | |
5 | Rated short circuit breaking current Rated short time withstand current(4s) | kA | 20 | 20 | |||||
25 | 25 | 25 | |||||||
31.5 | 31.5 | 31.5 | 31.5 | 31.5 | |||||
6 | Rated short circuit making current(peak) Rated withstand current(peak) | kA | 50 | 50 | |||||
63 | 63 | 63 | |||||||
80 | 80 | 80 | 80 | 80 | |||||
7 | Rated duration of short circuit | s | 4 | ||||||
8 | Rated operating sequence | O-0.3s-CO-180s-CO | |||||||
9 | Mechanical life | Times | 30000 | ||||||
10* | Rated single capacitor bank breaking current | A | 400 | ||||||
11* | Rated back to back capacitor bank breaking current | A | 400 | ||||||
12 | Max DC component | 50% | |||||||
Remark:1.No.10 &No.11 are offered while user need.
4. Overall drawing
Overall of fwithdrawable circuit breaker
Overall of fixed circuit breaker
5. Secondary connection diagram
Circuit breaker series 
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