A circuit can be connected or disconnected using a circuit breaker by manually moving the operating handle to the ON or OFF position. The mounded-case circuit-breakers are used in industrial and civil low voltage plants with service currents from 1 to 1000 A. They are used in direct and alternating current distribution switchgear, for motor protection (Motor Control Center), generators, capacitors and for end users. It is normally installed very close to the energy meter and should be readily accessible to the consumer.
Mounded Case Circuit Breaker (MCCB) |
The over load and instantaneous tripping elements are adjustable over the wide band make. The molded case circuit breakers are the important units used in electrical protection and control. The switching mechanism is enclosed in the mounded case. Molded case circuit breakers come in a wide range of sizes and current ratings. There are six frame sizes available: 100, 225, 400, 600, 800, and 2,000 amps. The size, contact rating, and current interrupting ratings are the same for all circuit breakers of a given frame size. The continuous current rating of a breaker is governed by the trip element rating.
