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Triple Pole-MCB

Easysparepart.com offers Triple Pole MCB of most popular brands including Havells, LT, Schneider, Siemens, GE with heavy discounts. We provide excise Modvat on order above INR20000.

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PRICE LIST LINKS OF HAVELLS MCB, L&T MCB, SCHNEIDER MCB, SIEMENS MCB

HAVELLS MCB Price List w.e.f 4 March 2015 (VIEW)      HAVELLS Customer Care No:+91-120-4771000

L&T MCB Price List w.e.f 1st January 2015 (VIE W)               L&T Customer Care No:18002094545

SCHNEIDER MCB Price List w.e.f 20thDecember 2013 (VIEW)  SCHNEIDER Customer Care No:18001030011

SIEMENS MCB Price List w.e.f 1stNovember2010(VIE W)        SIEMENS Customer Care No:+91 22 3967 7000

Introduction of Miniature Circuit Breakers (MCB’s)

circuit breaker is a manually or automatically operated electrical switch designed to protect an electrical circuit from damage caused by overload or short circuit. Its basic function is to detect a fault condition and interrupt current flow.

Categories of MCB’s:

     –MCB’s manufactured to IS/EN 60898 (IEC 689) are of three types; B,C, D.

    –MCB’s manufactured to IS/EN 60898 (VDE 0641) are of two types; L and G

 

WORKING PRINCIPLE OF CIRCUIT BREAKER

The circuit breaker mainly consists of fixed contacts and moving contacts. In normal "on" condition of circuit breaker, these two contacts are physically connected to each other due to applied mechanical pressure on the moving contacts. There is an arrangement stored potential energy in the operating mechanism of circuit breaker which is realized if switching signal given to the breaker. The potential energy can be stored in the circuit breaker by different ways like by deforming metal spring, by compressed air, or by hydrolic pressure. But whatever the source of potential energy, it must be released during operation. Release of potential energy makes sliding of the moving contact at extremely fast manner. All circuit breaker have operating coils (tripping coils and close coil), whenever these coils are energized by switching pulse, the plunger inside them displaced. This operating coil plunger is typically attached to the operating mechanism of circuit breaker, as a result the mechanically stored potential energy in the breaker mechanism is released in forms of kinetic energy, which makes the moving contact to move as these moving contacts mechanically attached through a gear lever arrangement with the operating mechanism. After a cycle of operation of circuit breaker the total stored energy is released and hence the potential energy again stored in the operating mechanism of circuit breaker by means of spring charging motor or air compressor or by any other means. Till now we have discussed about mechanical working principle of circuit breaker. But there are electrical characteristics of a circuit breaker which also should be consider in this discussion of operation of circuit breaker.

MCB Overcurrent Detector

MCB Overcurrent detection:

            –Thermal Tripping

            –Magnetic Tripping

Thermal tripping: 

–In this type of tripping mechanism the current is passed through a bimetal strip connected in series with a magnetic coil.

Magnetic tripping:

–When a short circuit occurs, the heavy current in the magnetic coil produces a strong magnetic field which instantly opens the breaker

Arc Extinction:

–facilitated by guiding the arc (via self-induced magnetic fields) on splitter plates

–facilitated by guiding the arc (via self-induced magnetic fields) on splitter plates

    The V-shaped metal splitter plates increase the length of the arc, splits it up, cools it and d-ionises it

Importance of MCB

A circuit breaker is an automatically-operated electrical switch designed to protect an electrical circuit from damage caused due to excess passage of current. Its basic function is to detect a fault and, by interrupting continuity, to immediately discontinue electrical flow. Unlike a fuse, which operates once and then has to be replaced, a circuit breaker can be reset (either manually or automatically) to resume normal operation. Circuit breakers are made in various sizes, from small devices used to protect an individual household appliance up to large switchgear designed to protect high voltage circuits to supply an entire city.

A MCB is a mechanical switching device which is capable of making, carrying and breaking currents under normal circuit conditions and also making, carrying for a specified time and automatically breaking currents under specified abnormal circuit conditions such as those of short circuit. In short, MCB is a device for overload and short circuit protection. They are used in residential & commercial areas. Just like we spend time to make a thorough check before buying appliances like washing machines or refrigerators, we must also research about MCBs. Also, if you are still using a fuse then you must replace it with MCB.

Our Major Brands of MCB are

Havells MCB, L&T MCB, Schneider MCB , Siemens MCB