High Voltage Vacuum Circuit Breaker (HV VCB)

The VXC1-12 series indoor trolley-mounted high-voltage vacuum circuit breaker is a three-phase AC 50Hz, 12kV rated indoor switchgear. It is suitable for control and protection in industrial and mining enterprises, power plants, substations, and electrical facilities, and is ideal for frequent operation. The operating mechanism is integrated with the circuit breaker body, allowing it to be used as a fixed installation unit or as a trolley unit with a dedicated propulsion mechanism. The main circuit utilizes an integrally sealed column, resulting in a compact, highly reliable, and maintenance-free circuit breaker. It is compatible with center-mounted trolley-mounted switchgear such as the KYN28A-12 (GZS), and can also be used with XGN series fixed switchgear in fixed configuration.

Normal Operating Environment
Ambient temperature: not exceeding 40°C, not below -10°C (storage and transportation at -30°C permitted).
Altitude: not exceeding 1000m. (If higher altitude is required, the rated insulation level will increase accordingly.)
Relative humidity: Daily average not exceeding 95%, saturated vapor pressure: Daily average not exceeding 2.2 × 10-11 MPa, monthly average not exceeding 1.8 × 10-11 MPa.
Seismic intensity: Not exceeding magnitude 8.
A location free from fire, explosion, severe contamination, chemical corrosion, or severe vibration.

The VZF-12 center-mounted, sealed vacuum load switch-fuse combination (hereinafter referred to as the vacuum switch) is a next-generation vacuum switchgear developed based on a unique design concept and market demand. It is widely used in indoor armored air-insulated switchgear and complies with standards such as GB3804-2004 and GB16926-1997.

Under normal operating conditions, within the technical parameters of the vacuum switch, the VZF-12 center-mounted, sealed vacuum load switch-fuse combination ensures safe and reliable operation in power grids of the corresponding voltage level.

Normal Operating Environment
1. Ambient Temperature: +40°C to -25°C.
2. Ambient Humidity: Daily Average Relative Humidity: ≤95%, Monthly Average Relative Humidity: ≤90%.
3. Daily Average Saturated Vapor Pressure: ≤2.2 x 10-3 MPa.
4. Monthly Average Saturated Vapor Pressure: ≤1.8 x 10-3 MPa.
5. Altitude: Not exceeding 1500m
6. Earthquake intensity: Not exceeding 8 degrees.
7. Applicable location: No dripping water, no risk of stagnation or explosion, no chemically corrosive gases, and no severe vibration.
8. If the product's operating environment exceeds the above requirements, the user can negotiate with our company to determine the appropriate location.

The VZD 12kV three-position vacuum circuit breaker integrates isolation, grounding, and interrupting functions, utilizes vacuum arc extinguishing technology, and features a compact design and easy operation. It supports both electric and manual control, features mechanical interlock protection, and is suitable for fixed or removable installation. Its high interrupting capacity, long life, and maintenance-free design make it suitable for substations, industrial and mining applications, and smart grids, enhancing power distribution reliability.

Product Technical Features
1. Compact/Flexible:
The air-based insulation method meets the electrical clearance and partial discharge standards of the power industry's technical specifications.
The compact cabinet dimensions (standard cabinet dimensions: 480*1000*1800mm (width x depth x height)) make the complete power distribution system extremely compact, saving space on expensive urban construction land.
Flexible busbar configurations and expansion options facilitate integration with other cabinet types.
2. Integrated/Encapsulated:
The integrated circuit breaker combination design integrates a disconnector, circuit breaker, earthing switch, and live sensor. The modular design provides simple, reliable interlocking and easy maintenance.
3. Visualization/High Efficiency:
The visual disconnector breakout design, rapid delivery, and overall modular design make assembly of the complete electrical system quick and easy.
The integrated structure allows all types of closing requirements to be implemented within a single unit, reducing the risk of locking failures caused by assembly process issues in the complete electrical system. 4. Stability/Durability:
Optional spring permanent magnet mechanism provides long mechanical life. The sealed vacuum interrupter provides dustproof and high insulation performance.

Product Technical Parameters
Rated voltage: 12kV
1-minute power frequency withstand voltage: 42kV
Lightning impulse withstand voltage: 75/85kV
Rated current: 630- 1250A (feeder)
Rated frequency: 50/60Hz
Rated short-circuit breaking current: 25kA/31.5kA
Rated short-time withstand current: 25kA/31.5kA
Rated peak withstand current: 50kA/63kA
Rated short-circuit current breaking cycles: 30
Mechanical life: 10,000 cycles (circuit breaker)
Power frequency withstand voltage for auxiliary circuits: 2000V
630-1250A (incoming line)
3,000 cycles (disconnector/earthing switch)
100,000 cycles (circuit breaker)

Applicable fixed switchgear structure:
The cabinet is constructed of 2.0mm aluminum-zinc coated steel sheets bent and assembled for high strength, light weight, and excellent corrosion resistance. It is divided into independent low-voltage compartments, busbar compartments, switch compartments, and cable compartments.

The FN7-12 indoor high-voltage load switch and fuse combination is a gas-generating indoor high-voltage load switch suitable for three-phase AC power systems with a 50 Hz frequency and a rated voltage of 12 kV. It is used for interrupting load current and closing short-circuit currents.

Normal Operating Conditions:
Ambient Air Temperature: Upper Limit: +40°C; Lower Limit: -10°C in general areas, -25°C in cold regions;
Altitude: 1000 m or less above sea level.
Relative Humidity: Daily average not exceeding 95%, monthly average not exceeding 90%;
Ambient air must be free from significant contamination by corrosive or combustible gases, water vapor, or other pollutants;
No frequent severe vibration.

The ZW32 12KV Manual and Electric Outdoor High Voltage Vacuum Circuit Breaker, is a robust and reliable switchgear device designed for use in 10kV outdoor distribution networks. It integrates both manual and electric operation modes, offering flexibility for local and remote control applications. The product features a three-phase design with color-coded operating levers for safe and intuitive identification, making maintenance and operation easier.

Its core vacuum interrupter technology ensures excellent arc extinguishing performance, high breaking capacity, and minimal maintenance needs. The insulating bushings are designed to withstand harsh outdoor environments such as rain, humidity, dust, and UV exposure, ensuring long-term stable operation.

This circuit breaker is widely used in urban and rural power grids, industrial and mining enterprises, and substations. It is particularly suitable for frequent operation scenarios and plays a critical role in system protection, load switching, fault isolation, and automatic reclosing. Its ability to be integrated with intelligent terminals allows for remote monitoring and control, making it an ideal solution for modern smart grid infrastructure. The ZW32 12KV unit enhances both operational safety and grid reliability, supporting efficient and secure power distribution.

12kV outdoor high-voltage disconnectors and vacuum circuit breakers are widely used in medium-voltage power distribution systems, primarily providing control, isolation, and protection. They are particularly suitable for substations, industrial and mining enterprises, and rural power grid upgrades.

Product Advantages:
High insulation performance: Utilizes high-voltage composite or ceramic insulators, suitable for harsh outdoor environments.
Safety isolation: Features a clearly visible disconnection to ensure safe maintenance.
Modular structure: Easy installation and easy integration with vacuum circuit breakers, lightning arresters, and other devices.
Multiple operation modes: Supports manual, electric, and remote control to meet the needs of smart grid access.
Low maintenance: Vacuum arc extinguishing design ensures long mechanical life and is suitable for frequent operation.

Typical Applications:
Rural distribution line segmentation; Industrial user line isolation; Boundary switches in urban distribution automation systems; Small substation inlet and outlet protection equipment.

Our ZW32 series 12kV outdoor high-voltage disconnectors and vacuum circuit breakers combine high-reliability operation with safe isolation, making them essential equipment for modern power distribution systems, helping to achieve efficient, safe, and intelligent power grid operation.

The PT/GL/JL 12kV High-Voltage Isolation and Metering Cart is a device designed specifically for power systems, primarily used for isolating and metering high-voltage circuits. Its compact design makes it easy to install and maintain. Constructed of high-strength materials, it ensures safety and durability in high-voltage environments. Its main components include an isolating switch, a metering device, and a trolley mechanism.

The isolating switch disconnects the circuit when necessary, ensuring the safety of maintenance personnel; the metering device accurately measures current and voltage, helping to monitor the operating status of the power system. The trolley mechanism allows the device to be easily withdrawn or pushed into the switchgear for easy operation and maintenance.

The overall design complies with relevant safety standards and is suitable for a variety of industrial and commercial power systems. Its reliability and efficiency make it an indispensable component of power systems.