What is difference between MCB and RCCB?


What is MCB?

MCB stands for Miniature Circuit Breaker. It automatically switches OFF electrical circuit during any abnormal condition in the electrical network such as overload & short circuit conditions. However, fuse may sense these conditions but it has to be replaced though MCB can be reset. The MCB is an electromechanical device which guards the electric wires &electrical load from overcurrent so as to avoid any kind of fire or electrical hazards. Handling MCB is quite safer and it quickly restores the supply.

What is RCCB?

Residual current circuit breakers are circuit protection devices used to isolate the circuit during earth faults, earth leakage and most importantly during electric shocks. They work by sensing the current imbalance between the phase and neutral conductors. RCCBs sense such imbalances and trips the circuit. RCCBs are insensitive to short circuits and heavy shorts circuits can potentially damage RCCBs.

Difference Between MCB and RCCB:



MCBs can provide protect during overcurrent and short circuits only

RCCBs can protect during earth leakages and electric shock only.

Insensitive to electric shocks.

Insensitive to short circuits and overloads.

Selected on the basis of short circuit and overload currents.

Selected on basis of leakage current.

MCBs are available in ranges of single-pole, two poles, three poles, and four poles

RCCBs can have two, three, and four poles. They are not available as single-pole variants.

Current ratings: 6A – 125A

Trip current sensistivity: 10mA, 30mA, 100mA and 300mA

MCBs can be used in residential, commercial as well as in industrial settings

RCCBs are used chiefly in residential settings for preventing electrical accidents.

No Test Operation

We can Test the device Working Condition using Test switch

Homes, Commercial, Industrial etc.

Mostly used in Homes

Less Cost

High cost

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