Magnetic Circuit Breaker Diagram

Circuit breakers cbs are designed to carry 100 of their rated current yet the national electric code nec dictates an 80 application.

Magnetic circuit breaker diagram.

2 0 circuit breaker design. Thermal magnetic circuit breaker definition. Electrical surges can cause short. There are other devices able to break a circuit during a surge or short circuit each with its own limitations.

This is done when the current passes through the solenoid magnetism develops in it due to changing magnetic flux and a magnetic field is created around the solenoid. 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. Overloaded circuits loose or faulty wiring and lightning can cause the circuit breaker to trip. 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.

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. So in case of a magnetic circuit breaker a solenoid or an electromagnet is attached to the trip unit. This information sheet discusses the difference between 80 and 100 rated circuit breakers. The function of the solenoid or the trip unit is to generate a magnetic field.

The first component is an electromagnet that is sensitive to large surges in electrical currents. These are circuit breakers which utilize two components to detect electrical faults. Circuit breakers may also use the higher current caused by the fault to separate the contacts such as thermal expansion or a magnetic field.