ALFHA Series Miniature Circuit Breaker

Support customized mass production ALFHA Series Miniature Circuit Breaker are recommended for use in electrical distribution panels of residential and public buildings.

-electric appliances, lighting – V characteristic switches;

- drives with moderate starting currents (compressor, fan group) – C characteristic switches;

- drives with high starting currents (hoisting mechanisms, pumps) – D characteristic switches;

Advantages

· Two types of short circuit protection.

· Wide range of operating temperatures from –40 to +50° С.

· Updated wider engagement lever with improved contact area.

· Notches on terminal clamps provide for lowering thermal losses and boosting the mechanical stability of connection.

What Is A Miniature Circuit Breaker?Have you ever imagined what happens to your household devices, fan, washing machine, oven, fridge, and many more when a short circuit or overflow of current happens? These devices get burnt and lead to fire accidents if proper circuit breakers are not installed in the devices. Miniature Circuit Breaker is a safety accessory with an electro-mechanical mechanism of action.

MCB is an automatic switch that opens when excessive current flows through the circuit. It can be reclosed without any manual replacement. In the case of a fuse, once it has been operated, it must be replaced or rewired, depending on the type of the MCB. Hence, fuse is known as one of the sacrificial devices. This is the main reason why MCBs are used as an alternative to the fuse in most of the circuits. Also, whenever there is a fault in the circuit, the switches in the MCB automatically shut down and the fault of the device can be easily detected.

Handling MCB is relatively safe, and it quickly restores the supply. MCB – Miniature Circuit Breaker can be reset quickly and does not demand more maintenance costs. MCB works on a bi-metal respective principle that protects against overload current and solenoid short circuit current.

The picture of MCB is shown below.

Types of Miniature Circuit BreakerMCB trip curve decides the type of MCB that must be used for different appliances or devices. There are 6 types of MCBs, they are:A TypeB TypeC TypeD TypeK TypeZ TypeA Type MCB trips off the circuit when the current exceeds 2-3 times the actual current rating. A type MCB – Miniature Circuit Breaker is highly sensitive to the short circuit, and hence we can find its application in the manufacturing of semiconductors.

B Type MCB trips off the circuit when the current exceeds 3-5 times the current flow and finds its application in cable protection.

C Type MCB trips off the circuit when the current exceeds 5-10 times the actual current flow and finds its application in domestic as well as commercial appliances like transformers, fluorescent lighting circuits, and IT equipment like personal computers, servers, and printers.

D Type MCB trips off the circuit when the current exceeds 10-20 times the current flow and offers high resistance. It finds its application in motors.

K Type MCB can withstand up to 8-12 times the current flow and finds its application in heavy-duty load devices like compressors, winding motors, and X-ray machines.