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Induction Motor Interview Questions with Answers | Part-1

Do you know what is ELCB and how ELCB works?!!!

Do you know what is ELCB and how ELCB works?!!! Do you know what is ELCB and how it works?!!! ELCB stands for Earth Leakage Circuit Breaker. ELCB is used for safety purpose for installing an electrical device with using high earth impedance against avoid shock. Main purpose of earth leakage circuit breaker is to keep safe the animals and humans against electrical shock. Various Types of ELCB Voltage operated ELCB Current operated ELCB Oparating Principle ELCB is the current operated device. So when leakage current reach at predetermined value then ELCB is operates. Working of ELCB Let consider single phase circuit which has two wire one phase and second neutral. These two wire phase and neutral are fed through separate winding of a current transformer which is shown in below image. Basic Circuit Diagram of ELCB Tripping mechanism control by second another winding, Now the current through the two wire phase and neu

Comparison Between Fuse and MCB !!!

Comparison Between Fuse and MCB !!! Comparison Between Fuse and MCB !!! Comparison points between Fuse and MCB is given below: Comparison point 1: FUSE Cost of fuse is very less as compared to MCB. MCB Cost of MCB is very high as compared to fuse. Comparison point 2: FUSE Capacity of breaking is less in fuse. MCB Capacity of breaking is high in MCB. Comparison point 3: FUSE Operation of fuse is very simple. MCB Operation of MCB is complex as compared to fuse. Comparison point 4: FUSE Time of operation is less in fuse. MCB Time of operation is more in MCB as compared to fuse. Comparison point 5: FUSE It is used only on to break the current in faulty condition. MCB It is used to break and make the circuit in faulty as well as healthy condition Comparison point 6: FUSE Operation of fuse is not more accurate. MCB

How M.C.B. works???!!!

How M.C.B. works???!!! How M.C.B. works???!!! Basic information MCB is the one type of electromechanical device and which is used for protection purpose at various places. MCB is the also one type of switching device. So MCB is required for safety purpose. MCB operates and disconnect the circuit of home appliances against electrical short circuit and high current. Principle of Operation There are mainly two principle are used in working of MCB Magnetic Principle ( For short circuit protection) Thermal principle  ( For overload protection) Circuit Diagram of MCB Circuit Diagram of MCB Working of MCB When over current flowing then the heat will be produced then the thermal operation is achieved. So during thermal operation, the latch mechanism will be released and contact make be open. So we tell that MCB will be work by inverse time-current characteristics means short time required or greater current for o

Various Types of Fuse!!!

Various Types of Fuse!!! And How it works??? Various Types of Fuse!!! And How it works??? We know that the main function of fuse is the protection of electrical equipments against high load current and any fault. There are generally three types of Fuse which is shown below Rewireable Type Fuse Cartridge Type Fuse H.R.C. Type Fuse How Fuse is work??!! All the the three types are described in detail below.... 1. Rewireable Type Fuse KitKat Fuse | Types of Fuse This type of fuse commonly used in house wiring. It is also known as kit kat type fuse. This type of fuse made of two porcelain parts Base and Fuse carrier The base is connected with switch board. Incoming wire is inserted from the one side and directly connected to the terminal wire. Outgoing terminal is taken from the other terminal and also is called onward connection. In base area, two terminal are connected through fuse wire which held in th

How Fuse is work??!!

How Fuse is work??!! What is Fuse?? Fuse is a one type of protective device which is used for protecting electrical equipments against short circuit and overloads. Construction of Fuse  A Fuse is directly connected with equipments to be protected in series, circuit diagram of fuse working is shown in below image. Working of Fuse In normal working condition fuse carries the load current without overheating. Also, when faulty condition or abnormal condition occurs yhen the excessive current flow through the fuse. When any fault occurs then temperature will be increasing and heat will be produced due to losses or fault. So, At that time the fuse element or fuse wire will be melts due to high temperature and then it will be open the circuit. So, Fuse protects the machines and electrical equipments from damage which will be occured by the high or excessive current. Note: Fuse always should be connected with the fase wire

Construction of Cable and It's Classification

Construction of Cable and It's Classification is given below in detail Construction of Cable and It's Classification A cable is the made by solid conducting material i.e. copper or aluminium and it's coated by insulation material. Construction Of Cable Cable is construct by various parts which is mentioned below: Conductor Insulation Metallic sheath Bedding Armouring Serving Description of all the parts is described below in detail..   1. Conductor The main function of conductor is to carry the current in such a manner. There are different types of conductor are used i.e copper, aluminium, tin, etc.. We can use gold and silver, but these metals are very costly.   2. Insulation Insulation is required between the conductor and earth. There are different types of insulation are used such that PVC, paper, varnished rubber, metalized paper, etc... Insulation protect the conductor.   3. Metallic