MCB&MCCB

Similrity Between MCB and MCCB

Below are some of the features and functionalities that MCB and MCCB have in common:

• They both provide an element of protection
• The MCB and MCCB sense and protect the power circuit from the short circuit or overcurrent situation
• They are mostly used in low tension or low voltage circuit.

Differences Between MCB and MCCB

The main difference between the MCB and MCCB is their capacity. On the one hand, MCBs have a rating of under 100 amps with an under 18,000 amps interrupting rating. Moreover, their trip characteristics may not be adjustable since they cater to low circuits primarily.

On the other hand, the MCCB provides amps as low as 10 and as high as 2,500, depending on necessity. They have an interrupting rate ranging from 10,000 to 200,000 amps. Moreover, the MCCB features an adjustable trip element for the more advanced models.

Other differences between the MCB and MCCB include;

• The MCB’s tripping circuit is fixed and is movable in the MCCB.
• MCBs have less than 100 amps, while MCCBs have as high as 2,500 amps
• In MCB, the remote on/off is impossible, while in MCCB, it is possible by the use of shunt wire
• The MCB is largely used in low circuit current, while MCCB is used for the heavy current circuit
• The MCB is used for low energy requirements (domestic purposes), whereas the MCCB is used in high energy requirement regions (large industries).