How MCB works and what’s inside a breaker and Types of MCB in tamil|Geninfopedia скачать в хорошем качестве

How MCB works and what’s inside a breaker and Types of MCB in tamil|Geninfopedia

In this video you can easily learned about How MCB works and what’s inside a breaker and Types of MCB. MCB – Miniature circuit breaker. A miniature circuit breaker is an electromagnetic device that carries a complete molded insulating material. A circuit breaker is an automatically operated electrical switch and its designed to protect an electrical circuit from damage caused by over current from overload or short circuit. Its function is to interrupt current flow after a fault is detected. MCB are time-delay tripping devices. MCB are designed to operate at less than 2.5 milliseconds when there are short circuit faults and between 2 seconds to 2 minutes in case of overloads. Short circuit current rating for normal 230V is 6000A (6KA) Short circuit current rating at 415V is 10000A (10KA) How MCB works and What's inside a breaker?.. 1. MCB overload protection During overload, the current Passes through the bimetal strip and it increases the temperature of the bimetal. And it causes a deflection in the bimetal. This is due to the expansion of metals. Then it releases the trip latch, and the contacts get separated. 2. MCB short circuit protection When there is a short circuit, the short circuit current flows through magnetic coil, the magnetic field created by the coil is strong enough to pull the spring holding the plunger in position, so when plunger moves it automatically activating the tripping mechanism. 3. Arc Chute purpose In MCB and other circuit breakers there is a combination of both thermal and magnetic tripping mechanisms. In both operations, an heavy arc is formed when the contacts start separating during live condition. Then this arc is forced into arc splitter. The arc splitter plates are also referred to as arc chutes. The arcs time and energy is extracted from the arc chutes and cools the breaker. Types of MCB: 1. B- type MCB In this type B , MCB trips instantly at a rate of three to five times it’s rated current. They are suitable for cable protection, small lighting loads, light commercial uses. 2. C-type MCB In this type B , MCB trips instantly at a rate of five to ten times its rated current. These MCBs are usually used for high inductive loads where switching surges are high such as in fluorescent lighting and small motors. Suitable for domestic and residential applications. 3. D-type MCB In this type B , MCB trips instantly at a rate of ten to twenty times its rate current. It is used for extremely high inductive loads such as motor with high starting current. They are suitable for special industrial and commercial applications. Some common examples are large winding motors, and industrial welding equipment, UPSsytems, X-ray Machines etc... ---------------------------------------------------------- Visit My channel link for more informative videos: http://bit.ly/geninfopedia Our Channel Facebook page Link:   / geninfopedia   ---------------------------------------------------------------- So , Watch this video fully & Don’t skip this video I hope you learned in this video. If you like this video please share your friends and subscribe my channel. --------------------------------------------------- Thanks for watching this video. Please leave a comment about my Video . Even negative comments and dislikes are most welcome, which will help to improve my channel. ----------------------------------------- #MCB #Miniature #Breaker #Circuit #Howcircuitbreakerworks ------------------------------------------- Playback music downloaded from Music : Autolife Musician : Hard fact URL : http://icons8.com/music -------------------------------------------- Copyright Disclaimer under Section 107 of the copyright act 1976, allowance is made for fair use for purposes such as criticism, comment, news reporting, scholarship, and research. Fair use is a use permitted by copyright statute that might otherwise be infringing. Non-profit, educational or personal use tips the balance in favour of fair use. --------------------------------------------