ZW8-12D/630A Outdoor High-Voltage Intelligent Vacuum Circuit Breaker, 10KV Pole-Mounted "Watchdog" Vacuum Switch

ZW8-12 outdoor high-voltage vacuum circuit breaker is a high-voltage outdoor switching device with a rated voltage of 12kV and three-phase AC 50Hz, used for switching load current, overload current and short-circuit current in rural power grids, urban power grids and small power systems. The product adopts a three-phase common tank structure, with a vacuum interrupter placed in a metal tank, and phase-to-phase and ground insulation is achieved through SMC insulating materials. This circuit breaker is equipped with a CT23 spring energy storage operating mechanism, supporting electric, manual and operation, and can be combined with a disconnector to form a combined circuit breaker with visible fracture. The permanent magnet model adopts an epoxy resin integral casting solid insulation process, with maintenance-free characteristics, and the external insulation material has anti-pollution flashover and ultraviolet resistance properties. Its rated short-circuit breaking current reaches 20kA, and the intelligent version can be equipped with automatic reclosing and three-stage composite protection for overcurrent, inrush current and short circuit, suitable for radial power supply systems and small hydropower grid-connected scenarios.

1. The overall structure is three-phase common tank type, the tank is usually filled with dry air, and the three-phase vacuum interrupter is placed in the metal tank. Phase-to-phase and ground insulation can use SMC (sheet molding compound) insulating materials or composite insulation.

2. The vacuum interrupter usually adopts a ceramic shell, with a cup-shaped longitudinal magnetic field contact structure inside, and the contact material is copper-chromium alloy.

3. The spring operating mechanism is usually equipped with a CT23 spring energy storage operating mechanism, which can realize electric energy storage, electric switching on and off, and also manual energy storage and manual switching on and off operations, with a mechanical life of up to 10,000 times.

4. The external insulation of the insulation system is mainly realized through the silicone rubber high-voltage bushing injected outside the incoming and outgoing conductive rods, with strong pollution resistance (adapted to Class III pollution environments). The internal insulation is mainly composite insulation material.

5. The conductive circuit is composed of incoming and outgoing conductive rods, dynamic and static conductive plates, conductive clips and vacuum interrupters.

6. Current transformers are optional, and 2 to 6 bushing-type current transformers can be built-in, with a transformation ratio range such as 50/5 to 1000/5.

7. Accessories and options can be configured. According to user needs, the circuit breaker can be equipped with various accessories: operating mechanisms include manual operating mechanisms or electric operating mechanisms; protection and control units include anti-inrush feeder protection devices, reclosing controllers (which can achieve 1-3 automatic reclosing times), intelligent controllers (with protection functions such as overcurrent, instantaneous trip, and small current grounding); measuring elements include built-in bushing-type current transformers and external or built-in voltage transformers; other electrical appliances include arresters that can be installed on the incoming and outgoing sides, and disconnectors that form a combined electrical appliance in series with the circuit breaker, with reliable mechanical interlocking between them. The tank has undergone special anti-rust treatment, and fine-particle silica gel desiccant is installed at the bottom, which needs to be replaced when its color fades

The ZW8-12 outdoor high-voltage vacuum circuit breaker adopts a vacuum interrupter, with strong arc extinguishing ability, high short-circuit breaking times, and no fire or explosion danger. This product adopts vacuum breaking technology, with the characteristics of long electrical life, reliable breaking and long-term complete maintenance-free, and is completely oil-free, SF6-free and maintenance-free, without polluting the environment. The external insulation of the product adopts silicone rubber materials or imported outdoor special epoxy resin integral casting process, with reliable insulation, and has the advantages of ultraviolet resistance, flashover resistance and pollution resistance, which can adapt to harsh climates and polluted environments. The circuit breaker is equipped with a CT23 spring energy storage operating mechanism, supporting manual, electric and operation. The permanent magnet model adopts a permanent magnet mechanism, with a mechanical life of more than 20,000 times, and has the characteristics of double-state non-demagnetization and maintenance-free. The intelligent version has 1~3 automatic reclosing functions, and has three-stage composite protection functions of closing inrush current control, overcurrent protection, short-circuit instantaneous trip and small current grounding protection. This product supports the "four remote" (remote measurement, remote signaling, remote control, remote adjustment) functions, and can cooperate with FTU to realize distribution automation and SCADA system monitoring. The product adopts a three-phase common tank structure, with compact structure, small size and light weight, which is convenient for installation and transportation. A disconnector can be added to form a combined circuit breaker, and current or voltage transformers can be configured as needed