Our factory
We are professional manufacturer of current transformer ,voltage transformer, Vacuum Circuit Breakers/Recloser,Isolation switches,Dropout Fuse Cut-out,Lightning Arresters,High and Low Voltage Cabinets,Metering Devices,Power Distribution Transformers etc.
GENERAL
ZW8-12 (G) series outdoor high-voltage AC intelligent vacuum circuit breaker (hereinafter referred to as "circuit breaker only") is applicable to the three-phase power system with three-phase AC 50Hz and voltage of 12kV. It is used for breaking and closing load currents. It has overload and short-circuit protection, definite time-delay protection, and an automatic reclosing function, and can also be equipped with a lightning arrester or isolating switch according to user needs.
The intelligent circuit breaker meets the requirements of GB / T 1984-2014 high voltage AC circuit breaker, DL / T 402-2016 high voltage AC circuit breaker, and DL / T 403-2000 technical conditions for ordering 12kV ~ 40.5kV high voltage vacuum circuit breaker and DL / T 721-2013 remote terminal of the distribution automation system.
MODEL DESCRIPTION
USAGE: ENVIRONMENTAL CONDITION
- Altitude: ≤ 1000m, If the altitude is higher than 1000m, the rated insulation level shall be corrected accordingly.
- Ambient temperature: -40oC ~ +45oC,
- Maximum daily temperature difference: 25K
- Humidity: Average daily relative humidity: 95%, average monthly relative humidity: 90%.
- Sunshine intensity: not more than 0.1W/cm2
- Wind Speed: 34m/s
- Wind pressure: 700Pa
- Pollution level: e - level
- Icing thickness: Not more than 10mm
- Resistance to floor drain: horizontal acceleration 0.3g, vertical acceleration 0.2g
MAIN ADVANTAGES
☆ Ceramic vacuum arc extinguishing chamber is adopted, with strong arc extinguishing ability and short-circuit breaking ability;
☆ It has the advantages of being explosion-proof, anti-condensation, anti-pollution, and no environmental impact
☆Air silicone rubber and engineering plastic composite insulation are adopted to avoid the possibility of insulation accidents caused by oil deterioration in oil insulation;
☆ The body can be equipped with an isolating switch to form a "combined electrical apparatus" with obvious fracture. The user can choose to use a silicone rubber insulating sheath on the isolating switch. The sheath has the advantages of rain, snow, sand, and strong resistance to pollution and corrosion, which can effectively improve the anti-freezing and anti-oxidation ability of the isolating switch;
☆ It can realize three-stage protection, zero sequence grounding protection, reclosing, and remote communication.
MAIN TECHNICAL PARAMETERS
| No. |
Item |
Unit |
Data |
| 1 |
Rated frequency |
Hz |
50 |
| 2 |
Rated voltage |
kV |
12 |
| 3 |
Rated current |
A |
630 / 1250 |
| 4 |
Rated short-time power frequency withstand voltage |
Interphase, to earth(wet) |
kV/min |
34/1 |
| Interphase, to earth(dry) |
42/1 |
| Fracture (dry) |
48/1 |
| Secondary circuit to earth |
2/1 |
| 5 |
Rated lightning impulse withstand voltage |
Interphase, to earth |
kV |
75 |
| Fracture |
85 |
| 6 |
Rated short-time withstand current and duration |
kA/s |
20/4 25/4 |
| 7 |
Rated Short-circuit breaking current(Effective value) |
kA |
20 / 25 |
| 8 |
Rated short-circuit making current(peak) |
50 / 63 |
| 9 |
Rated Peak-withstand current |
50 / 63 |
| 10 |
Main circuit resistance |
Without Isolation Switch |
μΩ |
not less than 120 |
| With Isolation Switch |
not less than 200 |
| 11 |
Rated Short-circuit breaking current breaking times |
Times |
30 |
| 12 |
Rated operating voltage and Rated Voltage for auxiliary(control) circuit |
V |
AC/DC220
DC48, DC24 |
| 13 |
Mechanical life |
Times |
10000 |
| Note: If the altitude is over 1000m, the rated insulation level should be modified as appropriate. |
OUTLINE AND INSTALLATION DIMENSION
Test Reports
All products have undergone professional testing and certification.
Our Customer
Our customers are located all over the world.
Photos of Product
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