Contactor LS model MC 12b coil 220V

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Contactor LS model MC 12b coil 220V


[LS contactor MC 12b coil 220V](https://www.automation24.ir/product-1099/%DA%A9%D9%86%D8%AA%D8%A7%DA%A9%D8% 25AA%D9%88%D8%B1-ls-%D9%85%D8%AF%D9%84-mc-12b-%D8%A8%D9%88%D8%A8%DB%8C%D9%86- 220-%D9%88%D9%84%D8%AA)

Contactors are electromagnetic switches and are considered to be one of the most important components of control circuits. Before contactors were made, connections were made by manual switches, which were of different types of blades, tongues and rollers, but with the arrival of contactors in the market, almost all the uses of simple switches Out of date, contactors were considered faster and more reliable.


## ** Compared to simple keys, the contactor has characteristics such as:

1-Command from several points

2- Remote control

3- Being economical

4- Automatic shutdown in case of power failure

5- The possibility of designing automatic circuits



Contactor building:

It can be said simply that the contactors are a series of metal contacts that are insulated from each other and also made of a bobbin to attract and repel these contacts.

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Contactor working principles:

When the fixed bobbin is energized by the control key, it acquires magnetic properties and attracts the moving part of the core like a magnet, since there are contacts in the attraction area that are in charge of disconnecting and connecting the electricity, when The attraction of the two cores of these contacts is connected and the contactor is connected.

There are springs between the two cores. The use of these springs is when the contactor is disconnected, so that when the coil is not fed by the control circuit, the electricity is cut off and the spring separates the two cores from each other.

### Some important specifications listed on the contactors nameplate:

1-Rated working voltage (ue): It is the amount of voltage that the contacts can withstand with the rated current Ie.

2-Rated insulation voltage (ui): specifies the insulation strength between connecting members.

3- Nominal supply voltage (uc): It is the voltage value that must be given to the contactor coil to trigger the contactor, and its value is usually written on the contactor.

4-Rated working current (Ie): The rated working current of a contactor is a current that expresses the condition of using the contactor and is related to the type and amount of voltage.

Things to consider when buying a contactor:

1-Bobbin supply voltage

2- Performance flow

3- Contactor power

4- Peripheral equipment



How to wire contactors

Contactors have several categories of terminals: A1 and A2 terminals, terminals No. 1-3-5 and 2-4-6, terminals No. 13-14 and 21-22.

There are two terminals marked A1 and A2 on the contactor, these two terminals are for feeding the coils of the contactor, that is, when you connect the phase (with the allowed voltage of the device) to A1 and the neutral to A2, the coil The contactor works.

Contactors have three input terminals 1-3-5 and three output terminals 2-4-6 so that we connect a single-phase consumer to the contactor.

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Industrial electricity

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