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Thermal magnetic type high circuit breaking capacity

Thermal Magnetic MCCB 200KA - 250A to 400A, 3/4 Poles, 400V/690V | China Suppliers & Factory

Rated Current: Available options include 250A, 315A, 350A, and 400A, ensuring compatibility for various applications.

Number Of Poles: Choose from 3P or 4P configurations to suit your specific needs.

Rated Working Voltage: Designed for operational efficiency at 400V/690V.

As a leading China supplier and factory, we pride ourselves on delivering high-quality electrical components tailored to meet industry standards. Our products are engineered with durability and performance in mind, making them a preferred choice for businesses worldwide. Partner with us for reliable solutions that enhance your operations.

Product Detail

MCCB Highlights

ARM5double breaking type high icu=ics mccb Main functions and features

Pneumatic protection device

When the circuit breaks with large current, the gas in the contact unit box is rapidly pressurized, and the pneumatic protection device rapidly fluctuates the operating mechanism latch under strong air pressure, greatly reducing the damage of the breaking current to other electrical components and buses.

Magnetic blow design

The current flows through the fixed contact to generate an electromagnetic source, which forms an annular magnetic field arc with the iron core and quickly enters the arc extinguishing chamber under the action of the magnetic field, which is conducive to quickly break the current.

ARM5

Frequently Asked Questions

What are the main features of the ARM5 double breaking type MCCB?

The ARM5 double breaking type MCCB features a high Icu=Ics rating, integrating advanced pneumatic protection and a magnetic blow design to ensure reliable circuit interruption and protect critical components.

How does the pneumatic protection device operate during a high current break?

When a large breaking current occurs, the gas inside the contact unit box rapidly pressurizes. This strong air pressure activates the operating mechanism latch, minimizing breaking current damage to buses and other electrical parts.

What is the purpose of the magnetic blow design in the ARM5 MCCB?

The magnetic blow design utilizes the current passing through the fixed contact to generate an electromagnetic source. This forms an annular magnetic field arc with the iron core, guiding the arc rapidly into the extinguishing chamber for quick current interruption.

Why is a high Icu=Ics rating beneficial for circuit breakers?

A high Icu (Ultimate Short-Circuit Breaking Capacity) equal to Ics (Service Short-Circuit Breaking Capacity) guarantees that the MCCB can clear short-circuit faults repeatedly without reducing its operational performance or safety margins.

How does the ARM5 MCCB prevent damage to electrical buses?

By combining a fast pneumatic protection device and an efficient magnetic blow arc extinguishing system, the ARM5 MCCB clears faults rapidly, reducing both thermal and mechanical stress on the electrical buses.