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ZW8-12(G) Series Outdoor High Voltage Vacuum Circuit Breaker

Product Structure

ZW8-12 model outdoor AC vacuum circuit breaker is used to make and break load current, overload current and short-circuit current in 12kV,50/60Hz power system. Its applicable for substations, industry and mining, urban and rural electricity power networks, especially applicable in occasions with frequent operation and automatic power distribution network. It accords with the standards of IEC62271- 100 & GB1984: AC high voltage circuit breaker, IEC60694 & GB/T11022: HV General technical requirement of switch and control apparatus.

Ambient Condition

  1. Altitude: ≤2000mm;
  2. Ambient air temperature: -40℃ ~+45℃ ;
  3. Wind speed: 34m/s;
  4. Earthquake intensity: 8 degree;
  5. Relative humidity: monthly average 90%, daily average 95%;
  6. Ice thickNess: 10mm ;
  7. Pollution degree: IV;
  8. There will be have dew under the condition of high temperature low down hastily.
 

No.

 

Name

 

Unit

Data
16kA 20kA 25kA
1          Rated voltage kV 10
2          Max. operation voltage kV 12
3          Rated current A 630/1250
4          Rated short-circuit breaking current kA 16 20 25
5          Rated short-circuit making current kA 40 50 63
6          Rated short-time withstand current kA 40 50 63
7          Rated short-time withstand current kA 16 20 25
1min P.F withstand voltage

8          Rated Insulate level

Lightning impulse withstand voltage(peak

kV

 

)   kV

42/48

 

75

9          Rated operating sequence O-0.3s-CO-180s-CO
10        Mechanical life Times 10000
11        Rated short-circuit breaking current breaking times Times 30
12        Rated Operating Setup Closing Voltage V AC220,DC220,100
13        Rated Operating Setup Opening Voltage V AC220,DC220,100
14        Contact Stroke mm 11±1
15        Contact Over travel (Contact Spring Constringent Length) mm 3
16        Out Of Simultaneity Of Contact Closing And Opening ms ≤2
17        Contact Closing Bounce Time ms ≤2
18        Average opening Speed m/s 1.0±0.2
19        Average Closing Speed m/s 0.7±0.15
The Highest Operating Voltage

20        Opening Time

s 0.015-0.05
The Lowest Operating Voltage s 0.03-0.06
21        Contact Closing Time s 0.025-0.05
22        Current by Phase Circuit Resistance μΩ ≤120(≤200)
23        Contact erosion limit mm 3

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