Difference between MCB and MCCB?
1- Circuit breaker (MCB):
The Miniature Circuit Breaker is an electromechanical device that shuts off a circuit when an irregular condition occurs. Effectively eliminates overcurrent caused by short circuits.
The principle of operation of a smaller-than-usual circuit is extremely simple. Their main function is to protect the devices from overcurrents. It has two contacts, one universal and one fixed. When the current increases, their general-purpose contacts are separated from the fixed contacts, opening the circuit and disconnecting them from the primary supply.
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2- Molded case circuit breaker (MCCB)
There are MCCBs left for molded case circuit breakers. It is a shielding device that protects the circuit from excessive load. It is mainly used where a flexible trigger is required. The current rating is up to 2500 amps. It is fundamentally utilized for high-current applications. The MCCB has a physically worked switch for stumbling the circuit.
The MCCB has two courses of action. One of them for the oven temperature and the other for the overcurrent. It contains a bimetallic contact that expands and contracts as the temperature of the MCCB changes.
Under normal operating conditions, a contact allows current to flow through the circuit. In any case, when the current increases above a certain value, their contacts heat up and rise until the contacts open. Properly isolates the circuit from the main power and protects the transmission from damage.
– Key Differences Between MCB and MCCB: –
The MCB is a kind of circuit breaker that protects the chassis from excessive load current, while the MCCB protects the chassis from excessive temperature and short circuit current.
The interference circuit of MCB
is solved while it is complete in the MCCB.
Note: The interference circuit is switched off and the current flows. When the surge current flows through the MCB and MCCB, it turns off the circuit breaker, protecting the device from damage.
The MCB is available in one, two, or three shaft versions, although there are also one, two, three, or four matching versions for the MCCB.
Note: The pole in the MCB indicates the number of steps the electrical switch uses for replacement and insurance.
The interference current is 1800 A for MCB and 10,000 to 200,000 for MCCB. Note: Interference current is the largest current that an electrical switch can withstand without interference.
Remote ON/OFF is not possible in MCB while it is possible in MCCB via drop cable.
The rated current of an MCCB is 100A and the rated current of an MCCB is between 10 and 200A.
Note: Rated current is the maximum current an electrical switch should draw.
The MCB is mainly used in low-power circuits while the MCBB is used in main-power circuits.
MCCB is used for residential purposes and MCCB is used for larger construction projects.
MCB and MCCB are thermomagnetic devices and are placed under the low-voltage circuit breaker.