Air Blast Circuit Breaker is those kind of circuit breaker which operates in air at pressure of 20-30 kg/cm2. It is also good choice to avoid the risk of oil fire, in case of oil circuit breaker. The aim of all kind of circuit breaker is to prevent the re-establishment of arc after current zero by creating … Read more
What are Valve Regulated Lead Acid (VRLA) Batteries? These batteries are popularly termed as maintenance free lead-acid batteries. Each cell in VRLA battery will have a value (automating operating) to allow the gas to escape if developed by the overcharging the cells and to hinder the entrance of oxygen from the air into the cell. … Read more
Definition A generating station which utilizes the potential energy of water at a high level for the generation of electrical energy is known as a hydro-electric power station. Hydro-electric power stations are generally located in hilly areas where dams can be built conveniently and large water reservoirs can be obtained. In a hydro-electric power station, … Read more
A generating station in which nuclear energy is converted into electrical energy is known as a nuclear power station. In a nuclear power station, heavy elements such as Uranium (U235) or Thorium (Th232) are subjected to nuclear fission. in a special apparatus known as a reactor. The heat energy thus released is utilized in raising … Read more
A generating station in which diesel engine is used as the prime mover for the generation of electrical energy is known as diesel power plant or diesel power station. In a diesel power plant, a diesel engine is used as the prime mover. The diesel burns inside the engine and the products of this combustion … Read more
Q. What is meant by “energy loss” in a machine? Answer. Whole of the input energy to the electrical machine is not converted into useful output energy but a part of the energy is converted into heat and is lost for the useful purpose of the machine. The energy converted into heat is called the … Read more
Q. What are the requirements of good electric braking? Answer. The requirements of good electric braking are: (i) The braking should be quick and reliable in action. (ii) The braking must be controllable. (iii) Some suitable means must be provided for dissipation of kinetic energy of the moving parts of the motor and its driven … Read more
Tellegen’s Theorem This theorem states that algebraic sum of the power’s in any circuit (linear, non-linear, unidirectional, bi-directional, time-invariant and time-variant elements) at any instant is zero. It was published in 1952 by Bernard Tellegen. For verification of Tellegen’s theorem, KVL and KCL equations are used. Tellegen’s theorem works based on the principle of the law of … Read more
Millman’s Theorem Case-1 The theorem states that if several ideal voltage sources V1, V2, V3,……., Vn in series with resistances R1, R2, R3,…….., Rn, are connected in parallel then the circuit may be replaced by a single voltage source Vout in series with the resistance Req. Let us consider a circuit having three sources i.e. n=3. … Read more
Nuclear power is the fifth -largest source of electricity in India after thermal, hydroelectric and renewable sources of electricity. 1. Gorakhpur Atomic Power Station (under construction) Operator: NPCIL Establishment Date: Location: Fatehabad, Haryana Reactor Units (MW): 4 x 700 MW Installed Capacity (MW): 2. Kaiga Nuclear Power Plant Operator: NPCIL Establishment Date: November 16, 2000 Location: Kaiga, Uttara Kannada, … Read more