There are significant differences between molded case switches and molded case circuit breakers in many aspects
1. Definition and function
Molded case switch:
It is a push-button operated electrical appliance, mainly used to control circuits.
It has overcurrent, overheating and undervoltage protection functions, and can automatically cut off the current when the current exceeds the set value, thereby protecting the line and equipment.
It is suitable for low-voltage distribution lines, motors or other electrical equipment circuits to meet the requirements of power distribution, branch protection and cutting off fault circuits.
Molded case circuit breaker:
It is an automatic protection appliance used to protect circuits and equipment.
It has overload protection and short-circuit protection functions. When an overload or short-circuit fault occurs in the circuit, it can quickly cut off the circuit to protect the circuit and equipment from damage.
It is widely used in power systems and various electrical equipment.
2. Appearance and structure
Molded case switch:
The shell is often made of plastic material, which is easy to install and use.
The structure is relatively simple, usually including operating handles, contact systems, arc extinguishing devices and other components.
Molded case circuit breaker:
The shell also uses plastic material to isolate the conductor and the grounded metal part.
The structure is relatively complex, including multiple components such as contact system, arc extinguishing device, tripping mechanism, operating mechanism, etc.
3. Application scenarios and installation methods
Molded case switch:
It is more used in fields such as home, public places and industrial power control.
It is simple to operate and easy to install. It is usually mounted on the wall or installed in the control box. It does not need to be fixed in the power equipment and is relatively flexible to use.
Molded case circuit breaker:
It is widely used in power systems and various electrical equipment.
It is usually installed in a fixed type and needs to be fixed in the power equipment. There are various fixing methods, such as screw fixing and rail installation.
4. Performance characteristics
Molded case switch:
It has the advantages of compact structure, small size, light weight and safe use.
Safe design, such as flip cover design, double insulation, etc., to ensure the safety of operation.
Molded case circuit breaker:
It has high breaking capacity and adjustability.
It can provide a variety of protection functions, such as overload protection, short circuit protection, undervoltage protection, etc.