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ZW7-40.5 outdoor High Voltage Vacuum Circuit Breaker
1.General Description
ZW7-40.5 series of outdoor High Voltage Vacuum Circuit Breaker with Central Operating Mechanism are 3 phase.AC 50(60) Hz outdoor high voltage distribution equipment with 40.5kV rated voltage,which can be used to open or close loading current. over-loading current and short-circuit current.it is widely used in rural electrical network and comply with GB1984-2003.Overall structure
of product adopt porcelain Insulator support type.Vacuum Interrupter is installed
inside. Upper insulator & bottom insulator is used for support insulator .three phases are amounted on same mechanism box.Moving end of vacuum interrupter is connected with operating mechanism through shaft and insulation lever.Operation mechanism is easy and convenient.
2.Applying conditions:
Ambient temperature;-30℃----+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 | 40.5 | ||||
2 | Rated power frequency withstand voltage/1min | Dry | kV | 95 | |||
Wet | 80 | ||||||
3 | Rated lighting impulse withstand voltage | kV | 185 | ||||
4 | Rated frequency | Hz | 50/60 | ||||
5 | Rated current | A | 1250 | 1600 | 2000 | ||
6 | Rated short circuit breaking current | kA | 20/25/31.5 | 25/31.5 | 31.5 | ||
7 | Rated withstand current(peak) | kA | 50/63/80 | 63/80 | 80 | ||
8 | Rated duration of short circuit | s | 4 | ||||
9 | Rated operating sequence | O—0.3s—CO—180s—CO | |||||
10 | Closing time | ms | 50～120 | ||||
11 | Opening time | ms | 20～60 | ||||
12 | Circuit resistance | μΩ | ≤50（not including mutual inductor） | ||||
13 | Rated short circuit breaking times | Times | 20 | ||||
14* | Rated single capacitor bank breaking current | A | 400 | ||||
15* | Rated back to back capacitor bank breaking current | A | 400 | ||||
16 | Mechanical life | Times | 10000 | ||||
17 | Operating mechanism | CT19W | CD10Ⅲ | ||||
18 | Max DC component | 40% | |||||
4.Overall drawing
4. Secondary connection diagram
Circuit breaker series 
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