The ZW68-12 outdoor high voltage AC circuit breaker is a three-phase AC switchgear with a frequency of 50Hz and a rated voltage of 12kV. It is primarily used for breaking and making load currents, overload currents, and short-circuit currents in power systems. The product fully complies with GB11022, GB1984, DL/T402, and the State Grid Corporation of China's procurement standards for 12kV~24kV outdoor pole-mounted circuit breakers. It has passed all tests and is suitable for use in substations and industrial and mining enterprise distribution systems for protection and control. It is also particularly suitable for rural power grids and locations with frequent operations. Additionally, it can be used as a sectionalizing switch in power grids, and with the addition of a controller, it can achieve distribution network automation.

The circuit breaker uses environmentally friendly dry air as the insulating medium, eliminating the use of SF6, with no risk of low-temperature liquefaction. It is a green, environmentally friendly product that is safe and maintenance-free. The pole-mounted circuit breaker and the associated FTU feeder terminal can operate normally at air temperatures ranging from -40°C to +55°C, with features such as anti-condensation and anti-pollution, making it specifically designed for outdoor operating environments. The circuit breaker is fully insulated, fully sealed, and has a compact design, with the vacuum circuit breaker, isolating switch, current transformer, voltage sensor, and operating mechanism all sealed within a single enclosure. This design is compact, has a high protection level, and is easy to install and transport.

All external components use military-grade aviation connectors, ensuring reliable connections and convenient plugging. The current loop has an anti-open circuit function, allowing for plug-and-play operation while the line is live.

The product has intelligent functions, capable of line loss measurement, ground fault line selection, and line protection, which are essential for distribution network automation. The FTU feeder terminal supports multiple power communication protocols, including wireless public networks and fiber-optic Ethernet. The configuration includes a backup power supply to ensure switch control and communication power for up to 48 hours after a power outage.

Key Features:

1. Integrated, Fully Insulated, Fully Sealed Design: The solid-sealed vacuum circuit breaker, direct-acting isolating switch (non-disconnectable), current transformer, voltage sensor, and operating mechanism are all sealed in a single enclosure. This enhances corrosion resistance and extends the lifespan of the main components.

2. Aluminum Alloy Enclosure: The enclosure is filled with high-performance, environmentally friendly dry air, enabling maintenance-free operation.

3. Built-In Sensors: The built-in phase current, zero-sequence current sensors, and bushing-type voltage sensors offer high measurement accuracy and easy installation, meeting the needs for line loss measurement and line protection.

4. Configurable FTU Distribution Automation Terminal: The FTU can be equipped with various communication modules, supporting multiple power communication protocols, including wireless public networks and fiber-optic Ethernet.

5. Mechanical Interlock for Misoperation Prevention: The circuit breaker body and isolating switch have a mechanical interlock to prevent misoperation.

6. Manual and Electric Operation: The isolating switch is manually operated, while the circuit breaker can be operated either electrically or manually. The enclosure has a handle with installed lifting rings, making it convenient for maintenance personnel to carry out on-site inspections and operations.