ZN28-12 Vacuum Circuit Breaker
Item:ZN28-12 Vacuum Circuit Breaker①Strong arc extinguishing ability②Long electrical life③Small size and light weight④Anti-condensation, maintenance-free⑤Protection and control circuits
Please hurry! Only 0 left in stock
Limited-Time Offers, End in:
151D
8H
23M
0S
ZN28-12 Vacuum Circuit Breaker
Our ZN28-12 Vacuum Circuit Breaker it is mainly used for breaking and closing the load current,overloadcurrent and short circuit current in the electronic system.The utility model is suitable for protectingand controlling the power distribution system of thesubstation and the t mine enterprise,and the place where the rural powe network operates frequently.it can also be used as the sectionalized switch of the power network,after the control is installed,the distribution network automation can be realized.
Model Description
Z:Vacuum circuit breaker
N:Indoor
28:Design Number
12:Rated voltage:10kV、11kV、12kV
▢: Rated current:630A、1000A、1250A、1600A、2000A、2500A、3150A
▢: Rated short-circuit breaking current:20kA、25kA、31.5kA、40kA
Working Environment：
◆Ambient air temperature: upper limit +40C, lower limit -30C; ;
◆Altitude: ≤2000m (if the altitude needs to be increased, the rated insulation level should be increased accordingly);
◆Wind pressure: no more than 700Pa (equivalent to wind speed of 34m/s);
◆Amplitude: earthquake intensity 8 degrees;
◆Contamination level: Class I;
◆Maximum daily temperature difference: no more than 25C.
Main Technical Parameters
|
Parameter |
unit |
20kA |
25kA |
31.5kA |
40kA |
|
|
Rated voltage |
kV |
12 |
||||
|
Rated current |
A |
630, 1000，1250 |
1600 |
2000, 2500 |
3150 |
|
|
Rated short-circuit breaking current |
kA |
20 |
25 |
31.5 |
40 |
|
|
Rated short-circuit making current (peak value) |
kA |
50 |
63 |
80 |
100 |
|
|
Rated peak withstand current |
kA |
50 |
63 |
80 |
100 |
|
|
4S rated short-time withstand current |
kA |
20 |
25 |
31.5 |
40 |
|
|
Rated insulation level |
Power frequency withstand voltage (before and after rated breaking) |
kV |
|
42 (fracture 48) |
|
|
|
Impact withstand voltage (before and after rated breaking) |
75 (fracture 85) |
|||||
|
Nominal Operation Sequence |
|
Points-0.3s-Combined points-180s-Combined points |
||||
|
Mechanical life |
Second-rate |
10000 |
||||
|
Rated short-circuit breaking current breaking times |
Second-rate |
30 |
30 |
30 |
20 |
|
|
Rated closing voltage of operating mechanism |
|
110, 220 |
110, 220 |
220 |
220 |
|
|
Rated closing current of operating mechanism |
A |
71 |
71 |
71 |
128 |
|
|
Rated opening voltage of operating mechanism |
|
AC/DC110, 220 |
||||
|
Rated opening current of operating mechanism |
A |
3.01.5 |
||||
|
Contact Spacing |
mm |
11±1 |
||||
|
Overtravel (contact spring compression length) |
mm |
4±1 |
||||
|
Three-phase opening and closing of different periods |
ms |
≤2 |
||||
|
Contact closing bounce time |
ms |
≤2 |
||||
|
Average opening speed (just 6mm high) |
m/s |
1.2±0.3 |
||||
|
Average closing speed |
m/s |
0.6±0.2 |
||||
|
Opening time |
at the highest operating voltage |
S |
≤0.06 |
|||
|
at minimum operating voltage |
≤0.08 |
|||||
|
Closing time. |
S |
≤0.1 |
||||
|
Main circuit resistance of each phase |
µΩ |
≤50 |
≤50 |
≤50 |
s35 |
|
|
The dynamic and static contacts allow the accumulated thickness of wear |
mm |
3 |
||||
|
Oil buffer buffer stroke |
mm |
10 |
||||
Structure And Mounting Dimensions
Product Real Shot
FAQ:
Q1:Is it possible to visit your factory?
A1:Our company is located in Zhejiang, China, near Shanghai. It is very convenient to visit us. And all clients from all over the world are highly welcome to us.
Q2:Can I order a ZN23-40.5 Vacuum Circuit Breaker sample?
A2:Yes, we accept any sample orders
Q3. What is your terms of delivery?
A3: EXW, FOB, CFR, CIF.
Hot Tags: zn28-12 vacuum circuit breaker, China, suppliers, manufacturers, factory, wholesale, cheap, high voltage electrical equipment, medium voltage switch, vacuum circuit breaker types, vcb switch, 11KV Indoor Vacuum Circuit Breaker, ZN28 12 Vacuum Circuit Breaker
- Choosing a selection results in a full page refresh.