High capacity and breaking capacity: Frame-type circuit breakers typically have high rated current and short-time withstand current, making them ideal for protecting large equipment and main lines.

Structural design: All components are mounted within a robust frame, often in an open configuration, facilitating easy replacement of contacts and components.

Protection functions: Capable of providing multiple protections including overload, short circuit, and under-voltage, and can achieve more precise protection through electronic or intelligent trip units.

Flexibility: Various accessories can be added as needed, such as auxiliary contacts and alarm contacts, and remote control and monitoring are possible.

Circuit Breaker Body: Includes core components such as main contacts, arc-extinguishing chamber, and operating mechanism.

Trip Unit: Responsible for detecting faults and issuing trip signals; can be electromagnetic, electronic, or intelligent.

Accessories: Includes auxiliary contacts, alarm contacts, shunt trip units, undervoltage trip units, etc., used to implement additional functions.

1. As the main switch in low-voltage power distribution systems, it is used for main power distribution and branch lines with large, important loads.

2. It is used in bus tie switches, high-capacity feeder switches, and control switches for large motors.

3. Suitable for the main outgoing line switch on the 400V side of large transformers.