Learn Electrical engineering onlineLearn Electrical engineering onlineLearn Electrical engineering online

Right Of Way / Way Leave Clearance for various Electrical Power Transmission Line

Width of maximum right of way permitted as per forest conservation act ‘1980 and its subsequent amendment dated 25th October, 1992, are as per Table 1.  Researches are being carried out for further optimizing the Right of Way. Guidelines of forest environmental rules shall be followed to avoid excessive tree cutting i.e. all the trees should be cut from root level in the 3 m corridor below each line conductor / earth wires.  In the balance corridor, trees branches are […]

Roles and Responsibilities of SLDC-State Load Dispatch Center in India

As per section 33 of Electricity Act – 2003 (Central Act 36 of 2003), SLDC-State Load Dispatch centers performs:- SLDC- State Load Dispatch Center suppose to carry out following functions or Roles and Responsibilities of State Load Dispatch Center. Scheduling: All Open Access users (excluding wind and mini hydel and generating stations having total capacity not less than 5 MW and up to 15 MW opting for injection under UI) that are connected to the Grid shall schedule and dispatch […]

Procedure to isolate 400KV Electrical Power Transmission line from system

1) Requisition form for 400Kv Line Clear Permit duly signed by maintenance engineer should be obtained. 2) Ensure that outage of the proposed line is confirmed. 3) Inform opposite end of the 400Kv transmission line and all other concern  before switching OFF breaker. 4) First switch off load end breaker & than Source end breaker of 400Kv Transmission line. 5) Check the Lamp Indication, semaphore for opening of breaker. 6) Check Current transformer relay switching and Potential transformer Read more […]

What is Electricity???

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 […]

Scientists, mathematicians and physicists in History of Electrical engineering

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 [...]

How to Replace Faulty DC Battery cell from working set in electrical power system

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 and Step voltage | Touch potential and Step potential

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 [...]

National Grid and Regional Grids in India| Power system Grids

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 [...]

Remarkable years in electrical power sectors of India | Landmarks

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 […]

What is Transposition of Electrical Transmission line?

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 [...]