AC miniature circuit breakers

 
kaveh Miniature Circuit Breaker (MCB)
 
Miniature switch as a circuit breaker in most homes today and protect sensitive systems for phones and safety of persons and equipment against overload and short circuit currents are used to.
 

Miniature key structure is as follows:
 
Base & Cover:
 
 All parts inside are MCB and must be insulated with a Min. voltage of 2500 V and a thermal resistance of 960 ° C with a flare (Normally the Bakelite, melamine or a particular type of poliamid).
 
Magnet:
 
Copper coil, fixed and mobile core made ​​of ferromagnetic materials, springs, fittings and ... is composed that Several times of the rated current MCB (the MCB type lighting or motor or hard motor is than 3 times the rated current is equal to 20) or short-circuit reacts and MCB will cause immediate trip . The standard MCB  for each rated current, its own magnet.
 
Handel:
 
 Means for inserting a MCB is plugged in or disconnected mode
 
Bi-Metal:
 
Overload Relay used in MCBs is a kind of Bi-metal . When the MCB is generated by a miniature screws, precision switch nominal current is set by the factory polish . It works off the circuit against overload relay is responsible .
 
Arc chute:
 
Is composed of parallel metal plates , are separated by a layer of insulation , when trip into small spark to ignite dangerous sparks and noise and helps prevent overheating . The MCBs are usually of poor quality and cheap price, there's this piece is perhaps the simplest or most basic way to identify it, is the MCB to weight loss. .
 
Springs and connectors:
 
These components must be mechanically and possesses a special structure and are resistant to corrosion .
 
Terminals:
 
Stainless conductors must be designed to be comfortable in it .
 
AC – MCB:
 
Use protective equipment to avoid dangers such as fires in a circuit, overload and short circuit caused the error occurred in the system is required . One of these devices due to the unique characteristics such as being used after each cut, cut, etc. used today, has three phase synchronous automatic trip Switches, are or miniaturized .Usually two types of AC and DC will be produced.
 
 
 
Miniature Circuit Breakers Kaveh two types of alternating current brightness (B) and motor (C) in a variety of single-pole, single pole with neutral (1P + N), two-pole, three-pole, three pole and neutral (3P + N) and the four bridges are produced.
 
Currently, two international standard IEC / EN 60898 and IEC / EN 60947-2 in accredited facilities and building miniature keys are used. In our country, the national standard for Miniature Circuit Breakers No. 2611 foundation developed the standard IEC / EN 60898 is.
 
It should be noted that the AC switch in DC circuit can not be used under any circumstances that the risks, such as failure to stop short time (due to union contacts) includes, It's a slow burn also added several contacts resulting in improper connection of fixed and moving contacts and the heat is generated.
 
DC Miniature Circuit Breakers, in addition to having a natural magnet for the relay to operate on direct current is magnetic . So we can also use the DC MCBs in  AC circuit .