Thermal Magnetic Circuit Breaker Schematic

In american homes today thermal magnetic circuit breakers are the most common type.

Thermal magnetic circuit breaker schematic.

The first component is an electromagnet that is sensitive to large surges in electrical currents. Designed for panel or plug in mounting. These are circuit breakers which utilize two components to detect electrical faults. Thermal magnetic circuit breakers contain two different switching mechanisms a bimetal switch and an electromagnet.

Thermal magnetic circuit breaker definition. Thermal magnetic circuit breaker 2210 s2. Bulletin 1489 m thermal magnetic circuit breakers are ul 489 listed for branch circuit protection in the united states and canada and they are certified as miniature circuit breakers for iec applications. The thermal trip unit protects against a continuous overload.

Thermal circuit breakers are also available as self resetting which in some unusual circumstances could also be a deciding factor. Circuit breakers may also use the higher current caused by the fault to separate the contacts such as thermal expansion or a magnetic field. 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 bimetal serves as a means of handling overcurrents.

When there is an overload the increased current flow heats the bimetal causing it to bend.