Product Overview
Zhejiang Lvma Electric Co., Ltd. ZW8-12 Outdoor High Voltage Vacuum Circuit Breaker is a robust outdoor medium-voltage switchgear for 12kV, 50Hz three-phase AC power systems. It is designed to switch load current and break overload and short-circuit current, providing reliable control and protection for outdoor power distribution networks.
Optimized for frequent operation, the ZW8-12 vacuum circuit breaker delivers stable, consistent performance under harsh outdoor weather conditions and fits perfectly with standard medium-voltage grid systems. It is widely deployed in urban and rural power grids, substations, as well as industrial and mining facilities for outdoor power system protection and control.
Fully compliant with GB/T1984, GB/T11022 and DI402 industry standards, our ZW8-12 outdoor circuit breaker ensures high durability and long-term operational reliability. It supports coordinated protection with upstream MV switchgears, effectively enhancing the overall safety and stability of medium-voltage power distribution systems for global engineering projects.
Key Features
Excellent Outdoor Adaptability
Designed specifically for outdoor installation, the circuit breaker maintains stable working performance against severe weather such as strong wind, rain, snow and high temperature, ensuring continuous operation in complex field environments.
High Frequent Operation Capacity
Optimized mechanical structure and high-quality vacuum interrupter support frequent switching actions, making it ideal for power systems that require regular start-stop and adjustment.
Reliable Protection Performance
Effectively switches load current and cuts off overload and short-circuit current, providing comprehensive and stable safety protection for medium-voltage outdoor power distribution systems.
Standardized & Durable Structure
Manufactured in full accordance with GB/T1984, GB/T11022 and DI402 industry standards, featuring solid structure, strong shock resistance and long service life with low daily maintenance requirements.
Good System Compatibility
Perfectly compatible with conventional 12kV medium-voltage grid systems, it can cooperate with upstream switchgear to realize multi-level coordinated protection and improve overall power grid stability.
Applications
The ZW8-12 outdoor high voltage vacuum circuit breaker is specially designed for 12kV outdoor medium-voltage power systems, serving as essential switching and protection equipment for various overhead line power distribution projects. With outstanding weather resistance and frequent operation capability, it is widely adopted in urban and rural overhead power grids, outdoor substations, and power renovation projects to ensure stable and safe power supply for residential and commercial electricity consumption.
It is also well-suited for industrial and mining enterprises, chemical plants, and industrial parks with high power stability requirements and frequent equipment switching needs. The durable outdoor structure enables reliable operation in complex field environments, effectively protecting production power systems from overload and short-circuit faults. In addition, this model is applicable for municipal power infrastructure, rural power transformation, and remote area power distribution projects, becoming a cost-effective and reliable power protection solution for diverse outdoor engineering scenarios.
Technical Specifications
Zhejiang Lvma Electric ZW8-12 outdoor vacuum circuit breaker is manufactured strictly in accordance with GB/T1984, GB/T11022 and DI402 industry standards, with standardized and reliable technical parameters suitable for various 12kV outdoor power distribution projects.
Rated Voltage: 12kV
Rated Frequency: 50Hz
Applicable System: Three-phase AC medium-voltage outdoor power system
Core Function: Load current switching, overload and short-circuit current breaking
Operating Condition: Adaptable to harsh outdoor weather, support frequent cyclic operation
Installation Type: Outdoor overhead installation
Compatibility: Matches conventional 12kV medium-voltage grid and supports coordinated system protection
Quality Standard: Compliant with national high-voltage switchgear industry standards
We support personalized parameter customization according to customer project requirements to meet diverse power system and engineering application standards.
Related Products
Type and meaning
Main Technical Parameters
|
No. |
Item |
Unit |
Parameter |
|
1 |
Rated voltage |
kV |
12 |
|
2 |
1 min power frequency withstand voltage-dry test |
kV |
42 |
|
3 |
1 min power frequency withstand voltage-wet test(to earth,external insulation) |
kV |
34 |
|
4 |
Lightnlng impulse withstand voltage(peak) |
kV |
75 |
|
5 |
Rated current |
A |
630 |
|
6 |
Rated frequency |
Hz |
50 |
|
7 |
Rated short-circuit breaking current |
kA |
12.5,16,20,25 |
|
8 |
Rated operating sequence |
O-0.3S-CO-180S-CO |
|
|
9 |
Breaking times of rated short-circuit breaking current |
Times |
30 |
|
10 |
Rated short-circuit making current(peak) |
kA |
31.5,40,50,63 |
|
11 |
Rated peak withstand current |
KA |
31.5,40,50,63 |
|
12 |
Rated short-time withstand current |
kA |
12.5,16,20,25 |
|
13 |
Rated short-circuit duration |
S |
4 |
|
14 |
Mechanical life |
Times |
10000 |
|
15 |
Rated operating voltage and rated voltage of auxiliary circuit |
V |
220 |
|
16 |
Rated current of over-current release |
A |
5 |
Usage Environmental Conditions
1. Altitude should not exceed 1000m;
2. Ambient temperature: -35℃~+40℃;
3. Relative humidity: monthly average value should not be over 90%; daily average value should not exceed 95%;
4. Seismic intensity: ≤ 8 degrees;
5. Environmental pollution withstand: grade IV according to Gb5582;
6. Thickness of ice coating: 10mm;
7. Air pressure: ≤ 700Pa (equal to wind speed 34m/s).
Structural Features
1. Adoption of vacuum interrupter.
2. Adoption of air-silicon rubber, engineering plastic composite insulation, avoiding possibility of insulation fault caused by oil deterioration of oil insulation.
3. It can be used as automatic recloser or automatic sectionalizer after being combined with a controller.
Overall and installation dimension
FAQ
Q1: What is the rated voltage of the ZW8-12 vacuum circuit breaker?
A1: This outdoor circuit breaker is rated at 12kV, suitable for 50Hz three-phase AC medium-voltage outdoor power distribution systems.
Q2: Is the ZW8-12 model suitable for outdoor harsh environments?
A2: Yes. It is professionally designed for outdoor installation, with strong weather resistance, capable of stable operation under high temperature, rain, snow and other harsh outdoor conditions.
Q3: Can this circuit breaker support frequent switching operations?
A3: Absolutely. The optimized mechanical structure and high-performance vacuum interrupter enable reliable frequent switching, which is its core advantage for daily power regulation scenarios.
Q4: What main protection functions does it provide?
A4: It can safely switch normal load current, and effectively cut off overload and short-circuit current, providing reliable safety protection for outdoor power grids and industrial power systems.
Q5: Does the product comply with industry standards?
A5: Yes. It fully complies with GB/T1984, GB/T11022 and DI402 industry standards, with stable quality and long service life.
Q6: Do you support customized parameters?
A6: Yes. Zhejiang Lvma Electric provides professional customization services to meet different project and power system requirements.
Hot Tags: zw8-12 outdoor high voltage vacuum circuit breaker, China zw8-12 outdoor high voltage vacuum circuit breaker manufacturers, suppliers, factory