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ZW32-12 Outdoor high voltage vacuum circuit breaker
1.General Description
ZW32-12 type outdoor high voltage vacuum circuit breaker is three-phase AC.50(60) Hz outdoor power distribution equipment with the rated voltage of 12kV.lt is mainly used to break and make the load current,over load current.and short circuit current in the electric power system.lt fits to be used to protect and control the circuit in substation. Mining and industrial enterprises.lt also can be used in the frequently operation places such as the rural power network.The product is accordance with GB 1984-2003. ZW32-12G VCB-Isolating switch combination consists of Vacuum circuit breaker body and isolating switch.
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）
Wind speed: ≤34m/s
Ambient pollution：III
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 power frequency withstand voltage/1min | Dry | kV | 42 | |||
Wet | 34 | ||||||
3 | Rated lighting impulse withstand voltage | kV | 75 | ||||
4 | Rated frequency | Hz | 50/60 | ||||
5 | Rated current | A | 630 | 1250 | |||
6 | Rated short circuit breaking current | kA | 20 | 25 | 20 | 25 | |
7 | Rated withstand current(peak) | kA | 50 | 63 | 50 | 63 | |
8 | Rated duration of short circuit | s | 4 | ||||
9 | Rated operating sequence | O—0.3s—CO—180s—CO | |||||
10 | Closing time | ms | 30～60 | ||||
11 | Opening time | ms | 20～40 | ||||
12 | Circuit resistance | μΩ | ≤50（not including mutual inductor） | ||||
13 | Rated short circuit breaking times | Times | 50 | ||||
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 | Special mechanism（manual or electric） | |||||
18 | Max DC component | 50% | |||||
4. Overall drawing
5.Secondary connection diagram
Circuit breaker series 
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