Summary
ZW8-12 type outdoor HV AC vacuum circuit breaker is used to make and break load current, overload
current and short-circuit current in
the power system with rated voltage 12kV, three-phase AC 50/60Hz. It is applicable to substations,
industrial and mining enterprises,
unban and rural electric power networks, especially to the occasions with frequent operation and automatic
power distribution networks
for power network control and equipment protection. It can be also used as a sectionalizing switch after
equipped with a disconnect
switch, thus the installation space and working hours can be saved more. The product conforms to the
standards of IEC62271-100 &
GB1984: AC high voltage circuit breaker, IEC60694 & GB/T11022: HV general technical requirement of
switch and control apparatus.
Ambient conditions
1. Altitude: ≤3000m;
2. Ambient temperature: -40℃～+40℃；diurnal temperature rang ≤25℃;
3. Wind speed: ≤35m/s;
4. Earthquake intensity: ≤grade 8;
5. Relative humidity: monthly average ≤90%; daily average ≤95%;
6. Ice thickness: ≤10mm
7. Pollution degree: ≤Ⅳ(GB5582);
8. Applicable occasions: no fire and explosion danger, no chemical corrosion and no frequent severe
vibration
Model
Main function features
1. The product can be equipped with an external isolator according to users’requirement;
2. The operating mechanism equipped with an anti-trip device and counter can be convenient for the users
to accurately know the operating life of the product;
3. Iron or stainless steel body, manual or electric mechanism is available for free chioce;
4. The product can be equipped with 3-sectional type anti-surge device and quick-breaking protection
device;
5. External PT and controller can realize automatic recloser function. Recolsing times can be set according to
users’requirement;
6. The product can be equipped with simple remote control device to realize remote operation;
7. The product can be provided with metering tank to realize electricity consumption monitoring.
Technical specification
|
No.
|
Item
|
Unit
|
Data
|
|
1
|
Rated voltage
|
kV
|
12
|
|
2
|
Rated insulation
level
|
1min P.F
withstand voltage
|
Dry test
|
42/48
|
|
Wet test
|
34
|
|
Lightning impulse withstand voltage(peak)
|
75/85
|
|
3
|
Rated current
|
A
|
630、1250
|
|
4
|
Rated short-circuit breaking current
|
kA
|
630、1250
20、25
|
|
5
|
Rated operating sequence
|
|
O-0.3s-CO-180s-CO
|
|
6
|
Rated short-circuit breaking current times
|
times
|
30
|
|
7
|
Rated short-circuit making current(peak)
|
kA
|
40
|
50
|
63
|
|
8
|
Rated withstand current(peak)
|
40
|
50
|
63
|
|
9
|
Rated short-time withstand current
|
16
|
20
|
25
|
|
10
|
Rated short-circuit duration
|
s
|
4
|
|
11
|
Opening time
(shunt trip)
|
At max. operating voltage
|
ms
|
15~50
|
|
At rated operating voltage
|
15~50
|
|
At min. operating voltage
|
30~16
|
|
12
|
Closing time
|
ms
|
25~50
|
|
13
|
Complete breaking time
|
≤100
|
|
14
|
Arcing time
|
≤50
|
|
15
|
Mechanical life
|
times
|
10000
|
|
16
|
Rated operating voltage and rated auxiliary loop
current
|
V
|
DC 220/AC 220
|
|
17
|
Contact gap
|
mm
|
11±1
|
|
18
|
Contact over-travel
|
3±1
|
|
19
|
Average opening speed
|
m/s
|
1.0±0.2
|
|
20
|
Average closing speed
|
0.7±0.15
|
|
21
|
Contact close-bouncing time
|
ms
|
≤2
|
|
22
|
Three-phase opening / colsing non-
simultaneity
|
≤2
|
|
23
|
Resistance for each phase loop
|
μΩ
|
≤150(200 with isolator)
|
|
24
|
Net weight
|
Manual type
|
kg
|
152(180 with isolator)
|
|
Electric type
|
162(190 with isolator)
|
|
Outline and installation dimension
4009-616-916
