Thermal Magnetic Motor Circuit Breaker

The motor protection circuit breaker can be considered a subtype of a thermal magnetic circuit breaker but with additional functions that are specially designed to protect electric motors.

Thermal magnetic motor circuit breaker.

They install on a standard 35mm din rail and work with a variety of accessories to make wiring as easy as possible. Molded case circuit breakers in individual enclosures are also being used in numerous applications. Both these devices act mechanically on the trip mechanism. The first component is an electromagnet that is sensitive to large surges in electrical currents.

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. These are circuit breakers which utilize two components to detect electrical faults. However engineers and technicians found some problems coming out with this method. C3controls series 330 motor protection circuit breakers provide reliable overload and short circuit protection for all your motor control applications and are ideal for use in multi motor applications.

In case of overload or short circuit the breaker trips opening the circuit and protecting the conductors. The basic working principle is similar to all other circuit breakers. Thermal protection is used to guard the electric motor against overload. An mccb provides protection by combining a temperature sensitive device with a current sensitive electromagnetic device.

The traditional molded case circuit breaker uses electromechanical thermal magnetic trip units that may be fixed or interchangeable. There are two commonly used methods of motor control system used in the industry. Thermal magnetic circuit breakers which are the type found in most distribution boards in europe and countries with a similar wiring arrangements incorporate both techniques with the electromagnet responding instantaneously to large surges in current short circuits and the bimetallic strip responding to less extreme but longer term over current conditions. The series c circuit breaker is ideal for panelboards switchboards motor control centers and busway applications.

Choose from a premier selection of trip units including thermal magnetic electronic and magnetic only switches. Available for systems up to 600 vac or 250 vdc with current ratings up to 800a. Contact me about this product. Thermal magnetic circuit breakers contain two different switching mechanisms a bimetal switch and an electromagnet.

The conventional method is the 3 component system where circuit breaker magnetic contactor and thermal overload relay are installed to control and protect the motor.