Tricky but Easy Electrical Engineering!
For better understanding of advantages and disadvantages of Short-pitched winding, we shall first understand the meaning of short-pitched coil and full-pitched coil. It will take some 10 minutes of your precious time to go through the write-up but it will really help you. Full Pitch Coil: A full pitched coil is defined as the coil … Read more
In principle, of course transmission lines can be rated in kW. There is some upper limit as to the power they can transmit. If the Power exceeds that power level then the lines would overheat, leading to breakdown of insulation and perhaps to the lines melting. But such a method of rating is pretty impractical. … Read more
Hydrogen is used for the cooling of Rotor winding i.e. field winding and Rotor Core in Turbo Generator. As shown in figure below, there are small windows on the Rotor structure which allows the passage of Hydrogen. This hydrogen cools the Rotor structure and filed winding. This hydrogen after cooling becomes hot which in turn … Read more
The Indian Electrical Industry is one of the leading electrical markets in the world, involved in the manufacturing and development of electrical equipment. The electrical industry consist of production of transformers, motors, generators, switch gears, home appliances, transmission lines, etc. This post describes about the top 8 Electrical Companies in India: 1. BHARAT HEAVY ELECTRICALS LIMITED … Read more
Before going to the mark difference between Dry Type Transformer and Oil Filled Transformer, it is worth to have some discussion on Dry Type Transformer. Dry Type Transformer: Dry Type Transformers find use in locations where the use oil Filled Transformers increases the fire hazard such as shopping malls, Hospitals, residential complexes etc. In dry … Read more
Transformer Oil is basically an Insulating Oil. Insulating Oils or Transformer Oils are mineral electrical insulating oils processed from fractional distillation and treatment of crude petroleum. An Insulating Oil must have the following properties: 1) Excellent dielectric properties resulting in minimum power loss. 2) High resistivity leading to better insulation values between windings. 3) High … Read more
As we know, both Snubber Circuit and Crowbar Circuit is used for protection against Overvoltage using Thyristor but they way they protect the Thyristor has some difference. Crowbar Circuit: Power supplies are normally reliable, but if they fail then they can cause significant damage to the circuitry they supply. To protect against this it is … Read more
As we know that Demineralized Water (DM Water) is a good insulator so it can strike our mind that why don’t we use DM water for cooling purpose of Transformer in place of Oil? To find the answer, we comare the properties of DM Water and Transformer Oil. Electrical Conductivity: Both Transformer Oil and Demineralized … Read more
Thermal Overload is widely used for Motor Protection. Basically Thermal Overload Relay is an overcurrent protection of the simplest type. The working principle of Thermal Overload Relay is quite simple but interesting. Figure below shows a typical Thermal Overload Relay. An adjustment dial located on the unit allows the ampere trip setting.A manual test button … Read more
Transformer Overflux Protection is provided to protect the Transformer core from overfluxing. A Transformer is designed to operate at a particular flux level. In case the flux in the core of Transformer exceeds a certain level, the core loss increases which may lead to overheating of components which in turn may result into internal fault. … Read more