The ARM5 is a double breaking type high icu=ics MCCB. Its main features include a pneumatic protection device and a magnetic blow design, both engineered to handle large breaking currents efficiently and minimize system damage.

When the circuit breaks under a large current, the gas inside the contact unit box is rapidly pressurized. Under this strong air pressure, the pneumatic protection device quickly fluctuates the operating mechanism latch to break the current swiftly.

By rapidly fluctuating the operating mechanism latch under strong air pressure, it greatly reduces the duration and impact of the breaking current, thereby protecting other electrical components and buses from severe damage.

The magnetic blow design uses the current flowing through the fixed contact to generate an electromagnetic source. This forms an annular magnetic field arc with the iron core, drawing the arc quickly into the arc extinguishing chamber to facilitate rapid current breaking.

High icu=ics indicates that the service short-circuit breaking capacity (Ics) is equal to the ultimate short-circuit breaking capacity (Icu). This ensures the ARM5 MCCB maintains high reliability and performance even after interrupting maximum fault currents.

Our manufacturing process relies on advanced automated assembly devices, professional molding and metal stamping production lines, and high-precision processing units to ensure robust and consistent product performance.