Welcome to our website! We are honored to introduce you to the Vacuum Circuit Breaker. High voltage circuit breakers are crucial equipment in power systems, primarily used for controlling and protecting the power grid. They are capable of handling voltage levels up to several thousand volts, thus playing a crucial role in transmission and distribution processes. Suitable for control and protection in power grids with AC 50Hz, rated voltage of 12kV, and rated working current of 630A to 4000A.

product description

The ZN139 series vacuum circuit breaker adopts advanced casting type solid sealed pole, and its special structure ensures reliable protection of the vacuum arc extinguishing chamber, avoiding the influence of mechanical impact, dust, and moisture.

Vacuum circuit breakers do not require arc extinguishing and insulation media. In fact, there are no ionizable substances in the arc extinguishing chamber. In any case, when the contacts separate, the arc channel between the contacts is only composed of the metal vapor of the contact material. When the main circuit current disappears at the natural zero crossing point, the arc cannot be sustained. At this moment, the rapidly decreasing current density and rapidly condensing vacuum metal vapor quickly restore insulation between the contacts.

The vacuum arc extinguishing chamber thus restores its insulation capability and the ability to withstand system transient recovery voltage, ultimately extinguishing the arc.

The contact material adopts high-quality materials, with cup-shaped longitudinal magnetic vacuum arc extinguishing chamber contacts and low current cutoff values; Adopting a one-time sealing process, the medium recovery strength is high and the leakage rate is low; High mechanical strength and long mechanical lifespan; Strong insulation recovery capability, greatly reducing reignition and TRV breakdown.

Features

Removable or fixed installation.

Durable and reliable, compact size, low maintenance workload.

Standard equipped with mechanical anti-bounce device.

Built-in operating mechanism energy storage rod.

Pole integral casting technology, lifelong sealing.

Vacuum breaking technology.

The vacuum arc extinguishing chamber is reliably protected from mechanical impact, dust, and moisture.

Complete secondary accessory series available for optional selection.

The circuit breaker can be manually operated by rocking in and out, and can only be operated when the cabinet door is closed.

The safety lock located on the operating mechanism and handcart chassis can prevent erroneous and dangerous operations.

The opening and closing buttons can be equipped with padlocks or protective covers.

Application areas

Widely used in industrial and mining enterprises, substations and other places, especially suitable for places with frequent operations.

Technical Parameters

Main specification model table of ZN139-12 High Voltage vacuum circuit breaker