Miniature Circuit Breaker Symbol Of Mcb

In residential applications single pole breakers protect 20v branch circuits and two pole breakers protect 240v branch circuits.

Miniature circuit breaker symbol of mcb.

The frame of a miniature circuit breaker is a. 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. Miniature circuit breaker construction is very simple robust and maintenance free. A circuit breaker is an automatically operated electrical switch designed to protect an electrical circuit from damage caused by excess current from an overload or short circuit its basic function is to interrupt current flow after a fault is detected.

Circuit breakers symbols for use in electrical pneumatic and hydraulic schematic diagrams. What is miniature circuit breaker mcb. 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. This would be a version of the sumbol you are looking for.

Miniature circuit breaker s 280 ux k s 280 u k english pdf certificate miniature circuit breaker s 611 english pdf certificate miniature circuit breakers s 220k english pdf certificate miniature circuit breakers s230 english pdf certificate main circuit breaker s 700k s700e s700 accessories english pdf certificate. Thermal magnetic trip curve of mcb concept with the diffe. Mcb full form mcb symbol 3 types of mcb miniature circuit breaker is the full form of mcb. An mcb or miniature circuit breaker is an electromagnetic device that embodies complete enclosure in a molded insulating material.

The qualifying symbol the bit like a square wave addition to the contact arm indicates a thermal component to the cb. Nowadays we use an mcb in a low voltage electrical network instead of a fuse. The voltage rating of a circuit breaker can be higher than the circuit voltage but never lower. Learn miniature circuit breaker mcb working principle mcb types and use in hindi in this video.

Available in svg png jpg dxf dwg formats. This type of circuit breaker rated current is below 100 amps. Unlike a fuse which operates once and then must be replaced a circuit breaker can be reset either manually or automatically to resume. Frame of miniature circuit breaker.

A miniature circuit breaker has normally three main constructional parts. Generally an mcb is not repaired or maintained it just replaced by a new one when required. Looking at the iec symbol menu under circuit breakers 1 pole the second symbol is for a thermal circuit breaker. For typical miniature circuit breakers this rating is 2 to 125 a.