Deepakkumar Yadav
Methods of Arc Extinction : Q. State and explain the two different methods of arc extinction in a circuit breaker. Q. Explain the principle of arc extinction in C.B. Explain the arc phenomenon. Q. State the method of arc extinction. Q. what are the two different methods of arc extinction in circuit breakers? Explain each … Read more
Electrical Circuit Breaker Arc Formation Process : Q. What is arc formation process? Q. Define circuit breaker. Explain arcing phenomenon in circuit breaker. Arc Formation Definition : Refer Figure (a) circuit breakers contacts are in closed position. And entire cross section of conductor carries the current. Now when fault occurs on system a heavy current flows … Read more
Types of Construction of Isolators : Q. Describe the vertical break isolator in brief. Q. Explain with neat labeled constructional diagram : operation of vertical pantograph type Isolator Q. With the help of a neat diagram, explain the working of pantograph isolator in brief Vertical break type Horizontal break center rotating double break isolator Pantograph … Read more
Electrical Isolators : Q. What is the function of isolator in a power system? Q. State the sequence of operation of isolator, circuit breakor and earthing switches : While closing the circuit While opening the circuit Isolator (disconnecting switch) operates under no load condition. It does not have any … Read more
High Rupturing Capacity (H.R.C.) Fuses : Q. Explain the constructional detail of high rupturing capacity cartridge fuse with neat sketch. Q. Explain the constructional detail of H.R.C. fuse. Q. Explain with neat sketch the working of HRC fuse. Q. Explain the construction and working of HRC fuse with diagram. HRC fuse Construction & Working : Figure (A) … Read more
LASERS : Construction and Working of LASER : Laser means “Light Amplification by Simulated Emission of Radiation”. Consider an atom when external energy (electromagnetic) is applied to it electron jumps from lower energy state to higher energy state. This electron emits electromagnetic radiation and light The colour of the light depends on frequency and wavelength. … Read more
LED light Working : (a) Electro luminescent lamps LED : Electroluminescence is the emission of light due to the interaction of an electric-field with a suitable solid. These solids may be panels, Light Emitting Diodes (LEDs), light emitting films. The panels employ microcrystalline powder phosphors based on the compounds like zine sulphide. whereas in case … Read more
Metal Halide Lamp : Metal Halide Lamps Working and Construction This lamp is known as mercury halide or metal halide lamp. It has a short arc tube. Inside it there are series of lamps combined within a single arc-tube with output characteristics of different mixtures of elements. When such metals (like thallium, indium, sodium, dysprosium) are introduced into … Read more
Compact Fluorescent Lamp (Tube) (CFL) : Q. Explain with diagram construction and working of CFL lamp. These are lamps of choice for those looking for an energy efficient alternative to incandescent lamps; they are paired for consuming and little as 1/5th of the power and lasting upto 13 times longer than incandescent lamps. Increasing variety … Read more
Halogen Lamps Halogen lamps are developed filament lamps and are free from drawbacks of filament lamps. Halogen lamp Principle : “Amount of radiations in visible spectrum increases as temperature of incandescent material increases upto 6000°C absolute”. Therefore, any material will be suitable and will have high radiating efficiency which has high melting point. Carbon and tungsten are better … Read more