Series outdoor high voltage vacuum circuit breaker

ZW8 Series Outdoor High Voltage Vacuum Circuit Breaker is a new type of outdoor high voltage switch equipment with a rated voltage of 12KV. It is mainly used in the distribution systems of urban and rural networks for carrying, connecting, and disconnecting load currents, overload currents, and short-circuit currents. It is an ideal product for achieving oil-free operation and replacing oil-immersed circuit breakers. The external insulation of ZW8-12 vacuum circuit breaker is made of reliable silicone rubber material, ensuring reliable insulation and strong pollution resistance. Equipped with a spring-stored energy operating mechanism, the ZW8-12 vacuum circuit breaker supports manual, motorized, and remote-controlled opening and closing operations. It can also be installed with an isolating switch on the side, forming an assembly of outdoor high voltage vacuum circuit breaker and isolating switch, which provides a visible isolation gap and reliable interlocking operation. Upon user's request, it can be combined with a corresponding controller to form an AC high voltage vacuum automatic recloser, automatic sectionalizer, with its own operating power supply, making it an ideal equipment for achieving automation in power distribution networks. The high voltage voltage transformer structure can be either external or internal. ZW8A-12 is a combination circuit breaker composed of a ZW8-12 circuit breaker and an isolating switch, serving as a sectional switch.

Product Model Name: ZW8-12 Series Outdoor High Voltage Vacuum Circuit Breaker (also known as Pole Mounted High Voltage Vacuum Circuit Breaker)

Model Meaning: 

Z W 8 -12/630 -20

│ │ │  │ │ │ │ └── Opening Current 

│ │ │  │ │ └───── Rated Current 

│ │ │  └──────── Rated Voltage 

│ │ │ 

│ │ └───────── Design Serial Number 

│ └────────── Outdoor 

└──────────── Vacuum

Main Application: The ZW8-12 Series Outdoor High Voltage Vacuum Circuit Breaker (referred to as "circuit breaker") is used in three-phase power systems with an AC frequency of 50Hz and a rated voltage of 12kV. It is designed to carry, connect, and disconnect load currents, overload currents, and short-circuit currents. The circuit breaker can be equipped with a reclosing controller, which recognizes current characteristics and achieves automatic reclosing or permanent fault isolation. With its own voltage transformer as a power supply, it becomes an intelligent circuit breaker capable of outputting voltage and current signals and being controlled. Equipped with an electronic voltage transformer, the circuit breaker can provide power and achieve three-stage composite protection for overcurrent delay, surge current delay, and short-circuit rapid tripping.

Key Features: 3.1 ZW8-12/T Type Outdoor High Voltage Vacuum Circuit Breaker The ZW8-12/T Type Outdoor High Voltage Vacuum Circuit Breaker is equipped with a spring operating mechanism, providing basic functionality such as opening, closing, load current handling, overload current handling, and short-circuit current handling. It serves as the basic model of the ZW8-12 series. By combining the circuit breaker with an isolating switch, the "composite circuit breaker" is formed, which has a visible isolation gap. Users can choose to use a silicone rubber insulation sleeve on the isolating switch, which has the characteristics of rain, snow, wind, and sand resistance, as well as resistance to pollution and corrosion, effectively avoiding freezing and oxidation of the isolating switch. The circuit breaker can be equipped with surge arrestors, which can be installed on either the incoming or outgoing side according to user's request. The circuit breaker can be equipped with a surge controller, enabling it to have surge avoidance and overcurrent rapid tripping functions. The circuit breaker can be equipped with 2-3 measuring or metering current transformers.

3.2 ZW8-12/C Type Outdoor High Voltage Vacuum Circuit Breaker The ZW8-12/C Type Outdoor High Voltage Vacuum Circuit Breaker possesses all the functionalities of the basic model. When combined with a reclosing controller, it becomes an intelligent circuit breaker of the recloser type. The basic model combined with the reclosing controller is suitable for scenarios where power supply is easily available. The PT model combined with the reclosing controller is applicable to scenarios without power supply. The intelligent circuit breaker is suitable for radiating power supply and ring network power supply systems, helping the system eliminate momentary faults, automatically restore power, and isolate permanent faults, thus achieving automation in the power distribution network. The intelligent circuit breaker features 1-3 reclosing functions, with adjustable reclosing parameters. The intelligent circuit breaker features three-stage composite protection functions: surge current control during reclosing, overcurrent protection, and short-circuit rapid tripping, with continuously adjustable parameters. The intelligent circuit breaker features small current grounding protection, with continuously adjustable parameters. The intelligent circuit breaker can be operated through wired remote control and wireless remote control beneath the pole.

3.3 ZW8-12/PT Type Outdoor High Voltage Vacuum Circuit Breaker The ZW8-12/PT Type Outdoor High Voltage Vacuum Circuit Breaker possesses all the functionalities of the basic model. This type of circuit breaker is equipped with a voltage transformer, which is supplied with power from the high-voltage side of the line. The voltage transformer can provide voltage of 220V, 110V, or 100V to itself or other control devices, as needed. The circuit breaker (hydroelectric type) can be used for monitoring line voltage. When overvoltage or undervoltage occurs, the controller automatically opens the circuit breaker, which can be widely used at the connection point between small hydropower branches and the main grid, achieving network monitoring and automatic fault isolation. The circuit breaker (metering type) can output voltage and current signals with accuracy level of 0.2, making it an ideal choice for agricultural distribution substations, external scattered switches, and simple metering switches.

3.4 ZW8-12/Electronic PT Type Outdoor High Voltage Vacuum Circuit Breaker The ZW8-12/Electronic PT Type Outdoor High Voltage Vacuum Circuit Breaker possesses all the functionalities of the basic model. This type of circuit breaker is equipped with an electronic PT and is charged by the battery through a CT in the absence of voltage. It can perform multiple energy storage and opening-closing operations in case of voltage loss, and can provide operating power to external devices. The circuit breaker features three-stage composite protection for surge current control during reclosing, overcurrent protection, and short-circuit rapid tripping, with adjustable protection parameters. The circuit breaker can be operated through wired remote control and wireless remote control underneath the pole.

In conclusion, the ZW8 Series Outdoor High Voltage Vacuum Circuit Breaker provides reliable and efficient solutions for power distribution systems in urban and rural networks. With its innovative design and advanced features, it ensures reliable insulation, flexible operation, and protection capabilities. The various types and models available offer customization options to meet specific requirements and achieve automation in power distribution networks, making it an ideal choice for modern power systems.