Thermal Magnetic Circuit Breaker Schematic

The bimetal serves as a means of handling overcurrents.

Thermal magnetic circuit breaker schematic.

Thermal magnetic circuit breakers contain two different switching mechanisms a bimetal switch and an electromagnet. Thermal magnetic circuit breaker 2210 s2. These circuit breakers are ideal for extreme ambient conditions feature fast breaking time and superior shock and vibration resistance. 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 thermal trip unit protects against a continuous overload. Designed for panel or plug in mounting. 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.

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. When there is an overload the increased current flow heats the bimetal causing it to bend. These are circuit breakers which utilize two components to detect electrical faults.

Magnetic circuit breakers have slightly higher interrupt capacity when running dc loads and some are also rated for either ac or dc currents.