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The working principle of ELCB is quite simple, There is a relay coil inside the ELCB. If there is a current leak due to insulation failure, ELCB is used to detect and prevent this condition and prevent injury to the human body or animal from electrical shock.ĮLCB detects the earth leaks current and isolates the electrical power flow by just tripping the circuit breaker. Earth Leakage Circuit Breaker(ELCB):Įarth Leakage Circuit Breaker usually abbreviated as ELCB, widely used in commercial as well as industrial applications. The wide range of current allows them to be used in various applications in both low-power as well as high-power applications. MCCBs are available with a minimum current rating of 15Amps to a maximum current rating of 2000 Amps. The main difference between MCCB and MCB is that the current ranges of MCCB are up to 2000 Amps and its trip setting is adjustable. MCCB is used when the load current exceeds the capability of a miniature circuit breaker, it is also used in applications that require an adjustable trip current setting.Ī molded case circuit breaker(MCCB) is a device that can be used with a wide range of voltages. MCCB is also an electromechanical device that is used to protect the circuit from over current and short circuit protection. MCCB stands for Molded Case Circuit Breaker. MCB can work from 0.5 to 63Amp with a short circuit current range of 3 to 10000 Amp and can be work with 230 or 440 volts. MCB can be of two, three, and four poles with a neutral pole if necessary. There is a bimetallic strip to protect an overload condition and a solenoid to protect a short circuit. MCB works in a combination of a switch, overcurrent, and short circuit protection.
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MCB is used for low power domestic and industrial applications. MCB is better than fuse since it doesn’t require to replace when an overload or short circuit identified. In simple words, MCB’s function is to interrupt the electrical flow during an error event. MCB is a resettable protective device without the use of the fusible element. MCB is an electromechanical device that is used to isolate the electrical circuit during overcurrent and short circuit situations. MCB stands for Miniature Circuit Breaker. There are different types of circuit breakers, which are used at different levels depending on the current carrying capacity, breaking capacity, and other functions. The trip unit senses the abnormal current flow in the event of overcurrent/overload, short circuit,Īnd causes the operating mechanism to open the contacts. It extinguishes the arc while in fault conditions. The contacts allow the current to flow through a circuit breaker when it is closed. It opens or closes contacts of the circuit breaker. The frame provides insulation to contain the arc. The frame protects all the internal parts of the circuit breaker and also supports the components. There are mainly five components that play an important role in the electrical circuit breakers.
#Mccb circuit breaker rating full#
Short Circuit is an overcurrent that greatly exceeds the normal full load current of the circuit. An overload is NOT a short-circuit or ground fault. Overload is the operation of equipment in excess of normal, full-load rating or of a conductor in excess of rated ampacity. The effects of overcurrent include fire, conductor insulation damage, and equipment damage. Overcurrent occurs due to overload, short-circuit, or ground fault. Overcurrent is defined as the excess of rated current. It breaks a circuit automatically under fault conditions like overcurrent/overload, short circuit, etc.ĭifference between Overcurrent, Overload, and Short Circuits It can be controlled manually or remotely under normal and fault functions. There are different types of circuit breakers, which are used at different levels depending on the current carrying capacity, breaking capacity, and other functions.Ī circuit breaker(CB) is a device used in the electrical power system. They have activated automatically as well as manually to control and protect an electrical power system. Residual Current Circuit Breaker(RCCB):Įlectrical circuit breakers are like a switching device, which is installed and used for safety purposes in all electrical fields like residential, commercial, and industrial.Difference between Overcurrent, Overload, and Short Circuits.