Thermal Magnetic Circuit Breaker Schematic

Circuit breakers may also use the higher current caused by the fault to separate the contacts such as thermal expansion or a magnetic field.

Thermal magnetic circuit breaker schematic.

These circuit breakers are ideal for extreme ambient conditions feature fast breaking time and superior shock and vibration resistance. Thermal magnetic circuit breakers contain two different switching mechanisms a bimetal switch and an electromagnet. 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. In american homes today thermal magnetic circuit breakers are the most common type.

The thermal unit is comprised of a bimetal element located behind the circuit breaker trip bar and is part of the breaker s current carrying path. The first component is an electromagnet that is sensitive to large surges in electrical currents. The bimetal serves as a means of handling overcurrents. Thermal magnetic circuit breaker definition.

Thermal circuit breakers are also available as self resetting which in some unusual circumstances could also be a deciding factor. Magnetic circuit breakers have slightly higher interrupt capacity when running dc loads and some are also rated for either ac or dc currents. The thermal trip unit protects against a continuous overload. Designed for panel or plug in mounting.

These are circuit breakers which utilize two components to detect electrical faults.