The main function of an mcb is to switch the circuit i e to open the circuit which has been connected to it automatically when the current passing through it mcb exceeds the value for which it is set.
Miniature circuit breaker box.
A miniature circuit breaker mcb automatically switches off the electrical circuit during an abnormal condition of the network means in overload condition as well as faulty condition.
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In residential applications single pole breakers protect 20v branch circuits and two pole breakers protect 240v branch circuits.
The voltage rating of a circuit breaker can be higher than the circuit voltage but never lower.
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Nowadays we use an mcb in a low voltage electrical network instead of a fuse.
What is miniature circuit breaker mcb.
Breakers load centers fuses.
The fuse may not sense it but the miniature circuit breaker does it in a more.
An mcb or miniature circuit breaker is an electromagnetic device that embodies complete enclosure in a molded insulating material.
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Unlike a fuse which operates once and then must be replaced a circuit breaker can be reset either manually or automatically to resume.
Miniature circuit breakers square d homeline hom250 miniature circuit breaker 120 240 vac 50 a 10 ka 2 poles thermal magnetic trip.