Molded Case Circuit Breaker (MCCB) Basic Knowledge

A. what is molded case circuit breaker(mccb)?
Molded case circuit breaker (MCCB) - is a type of electrical protection device that can be used for a wide range of voltages, and frequencies of both 50 Hz and 60 Hz. Featuring a current rating of up to 1600 A, and with adjustable trip settings . MCCB provide circuit overload protection, short circuit protection (short-time and instantaneous), as well as ground fault and earth-leakage protection for your electrical distribution system.

B.Molded case circuit breaker(MCCB) functions
The traditional molded-case circuit breaker uses electromechanical (thermal magnetic) trip units that may be fixed or interchangeable. An MCCB provides protection by combining a temperature sensitive device with a current sensitive electromagnetic device. Both these devices act mechanically on the trip mechanism.Depending upon the application and required protection, an MCCB will use one or a combination of different trip elements that protect against the following conditions:

• Thermal overloads
• Short circuits
• Ground faults
• Thermal Overload