Thermal Magnetic Circuit Breaker Diagram

Two mechanisms are used simultaneously to offer an end result that combines the response characteristics of each but the goal of both is the same.

Thermal magnetic circuit breaker diagram.

Both these devices act mechanically on the trip mechanism. Thermal magnetic circuit breaker definition. Small circuit breakers typically have a manual control lever to switch off the load or reset a tripped breaker while larger units use solenoids to trip the mechanism and electric motors to restore. The traditional molded case circuit breaker uses electromechanical thermal magnetic trip units that may be fixed or interchangeable.

Type lt or mt with thermal magnetic trip functions described in this instruction leaflet or type les electronic seltronic trip. Thermal magnetic circuit breakers contain two different switching mechanisms a bimetal switch and an electromagnet. Circuit breakers may also use the higher current caused by the fault to separate the contacts such as thermal expansion or a magnetic field. The first component is an electromagnet that is sensitive to large surges in electrical currents.

The bimetal serves as a means of handling overcurrents. The majority of circuit breakers are thermal magnetic which means they accomplish electrical protection by combining two mechanisms that respond to heat and magnetic fields respectively. 1 1 are available in two types. An mccb provides protection by combining a temperature sensitive device with a current sensitive electromagnetic device.

1 1 l frame and mdl frame series c circuit breaker thermal magnetic trip unit type lt general information trip units for l frame and mdl frame series c circuit breakers fig. Protecting the conductors and equipment connected to the.