The Electron, Name of Electricity came from the Greek word elektron. But tragedy is we haven’t seen electron yet. But we can measure it by various measurement devices like meters, oscilloscope, etc. We have also found ways to make them turn motors, light up light bulbs, and power cell phones, computers,and thousands of other really cool things. What is electricity though? Actually, that is a very good question. First we have to understand fundamental of Atom. Atom is made up [...]
Here is the Scientists, mathematicians and physicists who have given their Valuable and remarkable contribution for electrical engineering which we have as on today. 1.) William Gilbert (1544 to 1603):- He was English Physician and founder of Magnetism. He is famous for his book “De Magnete.” 2.) Charles A. Coulomb (1734 to 1806):- He is well known for “Coulomb’s Law” and unit of charge is “Coulomb” named after him was the French physicist. 3.) James Watt Read more [...]
DC batteries are the heart of any electrical power station or electrical substation. Because most of protection, annunciation, indication and communication system of electrical power station or substation are work by DC power. In case of AC power failure the only best option for power source is DC battery set. That’s why DC battery has so much importance in electrical power system. Now, here is the method how you can replace Faulty DC battery cell without interrupting DC power supply [...]
Touch voltage (or Touch potential) and Step voltage (or Step potential) are the significant term of electrical power system and mainly in electrical substations. Touch potential (Touch voltage):- As shown in above figure, suppose there is a structure which is faulted and fault current flowing towards ground through that structure. If a person standing on ground raises finger and touches that faulted structure than potential or voltage difference between that person’s finger and feet known as Read more [...]
India has five regional grids according to geographical area which covers the different state’s electrical power system. Each regional Grid has its own control center known as Regional Load dispatch center also known as Regional Load control center (RLCC). Over these Regional grids, there is National Grid have control center in Delhi Known as National Load Dispatch center also known as National Load Control Center (NLCC). National grid of India is nothing but Interconnection between regional Read more [...]
Here are some remarkable years or land mark in electrical power sector of India. In 1887 First hydro based power plant was commissioned at Darjeeling in electrical power system of India. In 1890 first steam based power plant was commissioned at Calcutta in electrical power system of India. In 1955 first 132Kv AC transmission line was commissioned in electrical power system of India. In 1959 first Nuclear power plant at trombay in electrical power system of India. In 1961 first [...]
Suppose a single circuit AC transmission line. In Single circuit AC transmission line 3 conductors of all the 3 phases are unsymmetrical placed. Due to unsymmetrical spacing of the conductors Inductance and Capacitance of each conductors becomes different. Suppose we assume that resistance is same for all the three conductors thandue to difference in inductance and capacitance, all the three conductors willhave difference in Impedance. So, due to difference in impedance Voltage dropis different Read more [...]
Float charging is used where load is constantly connected with DC batteries. In Float charging Load, DC Batteries and Float charger are connected in parallel. Batteries are constantly connected with load. so, float charger provides load current and charging current to battery. In, Float charging the rate of charging is equals to battery self discharging rate. Battery chargers are providing with Float and Boost charging mode and also each mode with Auto and Manual Mode. Float voltage to be set [...]
Boost charging is used when Battery is discharged and we want to build up voltage quickly. In other words if battery water gravity is low, we can increase it by Boost charging. Boost charger can be operated in constant current mode or constant voltage mode. Boost charging can be applied weekly after discharging cycle of battery set. At the moment of Boost charging voltage applied to battery set is very high compare to rated voltage, if that will appear across [...]
Trickle charging can be used for charged battery not for empty battery. Battery has its internal resistance through which its discharges very slowly known as self-discharging of battery. To overcome that effect Trickle charging should be given to put battery in fully charged condition. Trickle charging Battery is not permanently connected with charger in trickle charging, but by one day, by a week or by a month trickle charging should be given to battery to get its fully charged condition. [...]