Thermal Magnetic Motor Circuit Breaker

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Thermal magnetic motor circuit breaker.

In case of overload or short circuit the breaker trips opening the circuit and protecting the conductors. The series c circuit breaker is ideal for panelboards switchboards motor control centers and busway applications. Molded case circuit breakers in individual enclosures are also being used in numerous applications. 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.

Choose from a premier selection of trip units including thermal magnetic electronic and magnetic only switches. An mccb provides protection by combining a temperature sensitive device with a current sensitive electromagnetic device. 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. There are two commonly used methods of motor control system used in the industry.

The bimetal serves as a means of handling overcurrents. These are circuit breakers which utilize two components to detect electrical faults. They install on a standard 35mm din rail and work with a variety of accessories to make wiring as easy as possible. In american homes today thermal magnetic circuit breakers are the most common type.

Thermal protection is used to guard the electric motor against overload. Minimum downtime downtime is reduced and fuse replacement is eliminated with circuit breakers. 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 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 traditional molded case circuit breaker uses electromechanical thermal magnetic trip units that may be fixed or interchangeable. 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. However engineers and technicians found some problems coming out with this method. The first component is an electromagnet that is sensitive to large surges in electrical currents.

Both these devices act mechanically on the trip mechanism.