Give Me Information On An Industrial Circuit Breaker
Industrial circuit breakers are electrical devices used to break the electrical circuit during overload. It is used in commercial and residential purposes as
part of a safety process. Electric circuit breakers are automatically-operated switches to protect the electrical circuit from damage.
Several circuit breakers are classified according to voltage class, construction type, structural features and interrupting type. Under the voltage class,
three types of electric circuit breakers can be made. These are the low voltage, medium voltage and high voltage circuit breakers.
The low voltage industrial circuit breakers, containing less than 1000 VAC, are used commonly in residential, commercial and industrial application.
There are two sub-types of low voltage circuit breakers, namely the miniature circuit breaker, and the molded case circuit breaker.
The miniature circuit breaker or MCB has a rated current of not more than 100A. It can be operated by thermal or thermal-magnetic operation.
However, its trip characteristics are not adjustable.
The molded case circuit breaker or MCCB has a rated current of up to 1000A. Like the MCB, this too can be operated by thermal or thermal-magnetic
operation. Its trip current may be adjustable in larger ratings.
Low voltage circuit breakers are made for direct current applications or DC. They have electrical motor operators, which can be opened and closed
under remote control. They can be mounted in multi-tiers in low voltage switchboards.
The medium voltage industrial circuit breakers are rated between 1 and 72 kV. They may be assembled into metal-enclosed switchgear line up for
indoor. They can also be installed in individual components for outdoors. The characteristics for medium voltage are defined by international standards
such as International Electrotechnical Commission 62271.
There are three sub-types under medium voltage. These are vacuum circuit breakers, the air circuit breakers, and the SF6 circuit breakers. The SF