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The VD4 is a classic medium-voltage vacuum circuit breaker from ABB, suitable for 12–46kV medium-voltage power distribution systems. It features a modular spring-operated mechanism and solid-sealed pole design, offering high reliability, maintenance-free operation, and strong adaptability. With over 2 million units installed globally, it is widely used in power plants, industrial power distribution, building power supply, and special applications (such as capacitor bank switching and marine applications), making it one of the benchmark products in medium-voltage switchgear.
The VS1 (ZN63A)-12 is a three-phase AC 50Hz, 12kV indoor high-voltage vacuum circuit breaker. Its core design features a vacuum arc-extinguishing mechanism combined with a spring operating mechanism. It boasts advantages such as compact structure, high interchangeability, low maintenance, and excellent "five-proof" adaptability. Compatible with both truck-mounted and fixed switchgear, it is widely used in 12kV power distribution systems for power receiving, feeding, transformer/motor protection, and busbar connections. It is one of the mainstream benchmark products for 12kV medium-voltage switchgear in China.
The ZN28-12 is a 12kV indoor high-voltage AC vacuum circuit breaker, which is one of the common switching devices in power systems.
Applicable scenarios: installed in handcart-type/fixed switchgear, used for the protection and control of electrical equipment/lines in industrial and mining enterprises, power plants, and substations, especially suitable for places with frequent operation.
ZW8-12 is a 12kV outdoor pole-mounted high-voltage AC vacuum circuit breaker, which is one of the core switching devices in the distribution network (especially rural and urban networks).
Applicable scenarios: installed on the poles of 12kV lines, used for switching load current, overload current, and short-circuit current. It can also be used with controllers to realize distribution network automation (such as reclosing and four remote functions).
The ZW20-12 is a 12kV outdoor pole-mounted high-voltage vacuum circuit breaker, a commonly used device in distribution network automation scenarios.
Applicable scenarios: installed on the poles of 12kV overhead lines for line segmentation/connection and transformer protection. It can be paired with an intelligent controller to achieve "four remote" (remote measurement, remote signaling, remote control, and remote adjustment), and is one of the core switches in distribution network automation.
The ZW32-12 is a 12kV outdoor pole-mounted high-voltage vacuum circuit breaker, one of the most widely used pole-mounted switches in current power distribution networks.
Applicable scenarios: Installed on power poles of 10kV overhead lines for line segmentation/connection, transformer protection, and customer boundary demarcation; suitable for conventional and automated scenarios in rural and urban power grids.
