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what is contactor/ What is add on block?/ and Applications

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Contactor there is an automatic switching device. Which is used for automatic switching of any motor supply. It is typically used to convert the motor supply from starter to automatic delta.  It is mostly used in the panel of the machine. Which plays an important role in making any machine automatic. By the way, there are many companies making Contactors. Out of which the main companies are Schneider, Havells, L&T etc.  Application of Contactor? 1) Automatic running of motor on star and delta  2) Automatic on and off of motor  3) Automatic interlocking in a panel    Why contactor is used to start any motor?  Whenever a 3 phase motor runs, it is run on star connection for the first few seconds until that motor comes to its full RPM. And after it comes to full rpm it is run on delta connection.   Contactors are used to switch the supply from star to delta connection. The contactor abruptly switches the supply to the motor from star connection to delta connection, the process being fu

what is two stroke engine and Four stroke engine?

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To know what is the difference between two stroke engine and four stroke engine, we have to know about 2 stroke engine and 4 stroke engine. So further we know what is 2 stroke and 4 stroke engine.  what is two stroke engine? 2 stroke engines are those engines in which once the fuel blast occurs, the piston moves once downward and once upward, and a complete revolution of the crank soft is 360 degrees. That engine is called a two stroke engine.  One stroke engine   Fuel blast occurs only once in this engine. After which one turn down of the piston is called a stock. And one turn up is called two stocks. Which you can see in the picture given below. This engine is used in light vehicles like motorcycles, autos etc.  In this picture, you can clearly see that after one turn of fuel blast, the piston is going down one turn and one turn upwards. During this, one cycle of Crank Soft is also being completed. So this is how a 2 stock engine works?  what is four stroke engine? In a four stroke e

What is Overload Relay?

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Overload relay  An overload relay is an electric component used to protect a motor or a machine from overload. Which prevents our machine from overloading. The amount of current we want to pass through it is set. Which you can set according to the power rating of your motor.  image source by Google.com For example:  Suppose you have installed a 10 ampere motor, and put this overload relay with it, whose setting is 12 amps. So if ever this motor will draw more than 12 amps of current, then in that condition the overload relay will turn off the supply.  internal working of overload relay? Whenever a motor takes more load than its normal load ie more ampere, in that condition the overload relay senses the overload and further sends tripping command to the circuit breaker. Thermal type overload relay is used in overload relay. It has a bimetallic strip, the overload condition is sensed by this bimetallic strip.  What type of protection does overload relay provide? 

Tesla car battery/Technology/Life and Price

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Tesla car is the best and new generation electric car in the world. Till now Tesla's car is being sold in 180 countries. Tesla is a USA company, which exclusively manufactures electric vehicles. Tesla's car is made of such advanced technology that you will not see any shortcoming in it.  Big size batteries are used in all the electric vehicles you have seen till now. Which is much bigger in size. And its life is also very short. Compared to a Tesla car battery.  Lithium ion cell has been used in Tesla electric car. A cell is of 4.2 V. A total of 2976 cells have been used in a car. 5.3 kW power is made by connecting all in parallel and series. 31 battery packs are made from the cells. Each battery pack contains 96 Lithium Ion cells.  The lithium ion cells for Tesla's electric vehicle are manufactured by the Japanese company Panasonic.  What Battery was used in Tesla's car?  Generally, a large size battery is seen in any electric vehicle, which is also very heavy. But Tes

what is Transformer?

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Transformer is a machine that can increase or decrease the voltage flowing in the line without reducing the frequency. Transformer always works on AC current only  Transformer is being used everywhere in today's time. From the charger of our phones to the electricity coming into our homes. Transformers are used in 99% of electronic machines.  as an example    Our charger which is between 5 volt to 6 volt, first 220 volt AC current comes in the charger, which is converted to 5 or 6 volt with the help of transformer. Then that 6 volt current is converted into DC current by the rectifier. And further it works to charge our phone. Thus there are many electronics components in which transformers are used.  How  types of transformer are there?  There are two types of transformers 1) Step Down and  2) Step Up Transformer.  1) In the step down transformer, we supply further by reducing the voltage of the line which comes in the line.  as an example    Suppose 220 voltage is coming in our l

What is MCB?

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The full name of MCB (miniature circuit breaker) is miniature circuit breaker. Which provides protection to our current-powered equipment. Whenever there is more ampere or voltage supply in our line, then the MCB trips and breaks the current flowing in the line. Due to which our equipment is saved from damage.  For example :       Suppose our fan runs on 4 amps 220 volts. And we have put a 6 ampere MCB in it. So if ever there is a sudden current flow of more than 6 amps in that line, the MCB in the case will trip within a few seconds, breaking the supply. Due to which our equipment will be saved from damage.  In earlier times, fuse was mostly used instead of MCB. Fuse also works with this parker. Whenever there is an over voltage in the line or a short circuit, the fuse blows, and prevents the supply from going forward,  But fuse is still used in many places. Fuse does not provide us as much protection as MCB does, because unlike MCB, fuse does not have any specific tripping rating.  H

Top 10 best Screw Compressor in the World

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Today in the era of technology everyone's work is being made easier with the help of machines. Technology is changing very fast, all industries are moving towards automation except manual, so to fulfill all these, air compressor is required, which is considered to be the heart of any industry. Without air compressor It seems impossible to make less easy in any industries, so today let's talk about such Top 10 Screw Air Compressor which is on top in the whole world.  Best Screw Compressor   1.Atlas copco Atlas Copco was founded in Sweden in 1873 and is a world-renowned provider of industrial production solutions focused on compressor technology, vacuum technology solutions and air handling systems. Atlas Copco continues to innovate in technology and lead the industry with expertise that contributes to a wide range of industries around the world.   Atlas Copco has been placed in the first place because of its model VSD+, which has not yet been equaled by any other compressor comp