what is miniature circuit breaker?

Answer 1

A mini breaker is mainly used in panels that are full of breakers and have no extra spaces left. A mini breaker is only 1/2 the width of a normal breaker allowing you to install 2 breakers in the space of 1 normal breaker. The mini breaker should only be used in panels that have been approved for them and care should be taken not to overload your electrical service.

Answer 2

Miniature Circuit Breaker or MCB is a load dependent automatic switch which turns off if the load (current, or say-amount of power ) exceeds its rated limit. They have an electromagnetic or a bimetallic thermal trigger. The MCB is resettable--can be switched on after tripping within seconds. It gives a fixed predetermined current limit . It is much cheaper than a starter, but it lacks the integration of overload amount with time. So even if the increase in current is small, it will not wait even for a second to see if current falls back within limit. This may cause unwanted repeated tripping sometimes.

Answer 3

A circuit breaker is an automatically-operated electrical switch which is designed to protect an electrical circuit from damage caused by overload or short circuit. 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 varying sizes, from small devices which protect an individual household appliance up to large switchgear designed to protect high voltage circuits feeding an entire city.

Answer 4

It is a circuit breaker.

That means it will open the circuit and prevent the damage to the equipment, very likely a board.

Miniature because it is very small.

It is a very, very small circuit breaker.

Reason :

Eg

In 1964, the computer that you have, to day to ask yahoo Q? would have taken up a sky scraper and still may have to have room for people to work, and would have required few people to operate and monitor, change tubes from time to time.......

In space application the mother board in your computer is the size no more then few millimiter square. There are integrated circuits that fit on a pin head.

So the size matters and smaller the batter, less weight.

Answer 5

A circuit breaker is an automatically-operated electrical switch which is designed to protect an electrical circuit from damage caused by overload or short circuit. 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 varying sizes, from small devices which protect an individual household appliance up to large switchgear designed to protect high voltage circuits feeding an entire city.

Operation

Magnetic circuit breakers are implemented using a solenoid (electromagnet) whose pulling force increases exponentially as the current increases. The circuit breaker's contacts are held closed by a latch and, as the current in the solenoid increases beyond the rating of the circuit breaker, the solenoid's pull releases the latch which then allows the contacts to open by spring action. Some types of magnetic breakers incorporate a hydraulic time delay feature wherein the solenoid core is located in a tube containing a viscous fluid. The core is restrained by a spring until the current exceeds the breaker rating. During an overload, the solenoid pulls the core through the fluid to close the magnetic circuit, which then provides sufficient force to release the latch. The delay permits brief current surges beyond normal running current for motor starting, energizing equipment, etc. Short circuit currents provide sufficient solenoid force to release the latch regardless of core position thus bypassing the delay feature. Ambient temperature affects the time delay but does not affect the current rating of a magnetic breaker.

Thermal breakers use a bimetallic strip, which heats and bends with increased current, and is similarly arranged to release the latch. This type is commonly used with motor control circuits. Thermal breakers often have a compensation element to reduce the effect of ambient temperature on the device rating.


Thermomagnetic circuit breakers, which are the type found in most distribution boards, incorporate both techniques with the electromagnet responding instantaneously to large surges in current (short circuits) and the bimetallic strip responding to less extreme but longer-term overcurrent conditions.

Circuit breakers for larger currents are usually arranged with pilot devices to sense a fault current and to operate the trip opening mechanism.

Under short-circuit conditions, a current many times greater than normal can flow (see maximum prospective short circuit current). When electrical contacts open to interrupt a large current, there is a tendency for an arc to form between the opened contacts, which would allow the flow of current to continue. Therefore, circuit breakers must incorporate various features to divide and extinguish the arc. In air-insulated and miniature breakers an arc chute structure consisting (often) of metal plates or ceramic ridges cools the arc, and blowout coils deflect the arc into the arc chute. Larger circuit breakers such as those used in electrical power distribution may use vacuum, an inert gas such as sulfur hexafluoride or have contacts immersed in oil to suppress the arc.

The maximum short-circuit current that a breaker can interrupt is determined by testing. Application of a breaker in a circuit with a prospective short-circuit current higher than the breaker's interrupting capacity rating may result in failure of the breaker to safely interrupt a fault. In a worst-case scenario the breaker may successfully interrupt the fault, only to explode when reset, injuring the technician.

Small circuit breakers are either installed directly in equipment, or are arranged in a breaker panel. Power circuit breakers are built into switchgear cabinets. High-voltage breakers may be free-standing outdoor equipment or a component of a gas-insulated switchgear line-up

Answer 6

The molded case circuit breaker is often bolt fixed and has various ratings and interrupting ratings and frequently is enormous in length. The miniature circuit breaker is often smaller in length and is often fixed on a DIN rail for user-friendly withdrawal. If the load circuit is an same, it can function clone of the MCCB. it frequently has a score as a lot as one hundred amperes really and reduce interrupting score thanthe MCCB.

Answer 7

same thing as a circuit breaker in your home electrical panel
or same principal I should say only in miniature. you mostly find them in small appliances or circuit boards or electronic devises that need over current protection.

Answer 8

Miniature circuit breakers protect installations against overload and short-circuit, warranting reliability and safety for operations. System pro M compact S 200 series are current limiting overcurrent protective devices. They have two different tripping mechanisms, the delayed thermal tripping mechanism for overload protection and the magnetic tripping mechanism for short circuit protection.


Main benefits:

1.Extra-wide and complete range of MCBs to cover most applications and markets
2.Meeting worldwide standards
3.Certificates, documentation, training or background information to support customers due to their daily work
4.Space and time saving thanks to the unique bottom-fixing auxiliary contact

Main features:

1.MCB range offer the possibility to select among different characteristics (B, C, D, K, Z), configurations (1P, 1P+N, 2P, 3P, 3P+N, 4P), breaking capacities (up to 25 kA) and rated currents (up to 63A).
2.Compliance to the worldwide product standard:
• IEC/EN 60898-1
• IEC/EN 60947-2
• UL 1077
• UL 489
• CSA 22.2 No. 235
• CSA 22.2 No. 5
allowing the use for residential, commercial and industrial applications.
3.35 mm2 and 10 mm2 cylinder lift twin terminals for challenging industrial use. Cross wiring can easily be realized by inserting the bus bars into the rear terminal part and the incoming wires into the front part.
4.Real contact position indication, directly connected to the moving contact, for more comfort and safety

Electrikals..

Answer 9

it's a kind of circiut breaker(a little like a fuse) that use generally in the houses and home and it's resetable when it jumps out and cut the electricity amper.

Answer 10

Small breaker that is fixed on to your distribution board in place of fuse wire/fuse holder.