Free Expert Guides on Power Systems, Circuit Design & Electrical Troubleshooting

Like capacitor bank, we can use an overexcited synchronous motor to improve the poor power factor of a power system. The main advantage of using synchronous motor is that the improvement of power factor is smooth.When a synchronous motor runs with over-excitation, it draws leading current from the source. We use this property of a synchronous motor for the purpose.Here, in a three-phase system, we connect one three-phase synchronous motor and run it at no load.Suppose due to a reactive load of t

A capacitor bank is a group of several capacitors of the same rating that are connected in series or parallel to store electrical energy in an electric power system. Capacitors are devices that can store electric charge by creating an electric field between two metal plates separated by an insulating material. Capacitor banks are used for various purposes, such as power factor correction, voltage regulation, harmonic filtering, and transient suppression.What is Power Factor?Power factor is a mea

We defineinsulation resistanceas the ratio of applied direct voltage across an insulation to the corresponding current through it.Mesaurement of inslation resistance is quite important. We normally take the reading of the measurement at a certain time after application of test voltage. The standard duration of voltage application are 1 minute or 10 minutes. Because of that, insulation resistance can also be referred as 1 minute insulation resistance or 10 minute insulation resistance depending u

To ensure the desired performance of an electrical insulator, that is for avoiding unwanted insulator failure, each insulator has to undergo numbers of insulator test.Before going through testing of insulator we will try to understand different causes of insulator failure. Because insulator testing ensures the quality of electrical insulator and chances for failure of insulation depend upon the quality of insulator.Causes of Insulator FailureThere are different causes due to which failure of ins

Insulation Coordination in Power System was introduced to arrange the electrical insulation levels of different components in the electrical power system including transmission network, in such a manner, that the failure of insulator, if occurs, confindes to the place where it would result in the least danmage of the system, easy to repair and replace, and results least disturbance to the power supply.When any over voltage appears in the electrical power system, then there may be a chance of fai

Type of Insulators Used in Transmission linesThere are 5 types of insulators used in transmission lines as overhead insulation: Pin Insulator Suspension Insulator Strain Insulator Stay Insulator Shackle InsulatorPin, Suspension, and Strain insulators are used in medium to high voltage systems. While Stay and Shackle Insulators are mainly used in low voltage applications.Pin InsulatorPin insulators are the earliest developed overhead insulator, but are still commonly used in power networks up to

What is an Electrical Insulator?An electrical insulator (also referred to as an insulator) is used in an electrical system to prevent unwanted flow of current to the earth from its supporting points. The insulator plays a vital role in the electrical system. An electrical insulator is a very high resistive path through which practically no current can flow.In transmission and distribution systems, the overhead conductors are generally supported by supporting towers or poles. The towers and poles

We can first go through the description of dielectric materials. It actually does not conduct electricity. They are insulators having very low electrical conductivity. So we have to know the difference between dielectric material and insulating material. The difference is that insulators block the flow of current but the dielectrics accumulate electrical energy. In capacitors, it performs as electrical insulators.Next, we can come to the topic. The dielectric properties of insulation include bre

Basic Insulation Level DefinitionWhen lightning impulse over voltage appears in the system, it is discharged through surge protecting devices before the equipments of the system gets damaged. Hence, the insulation of such equipment must be designed to withstand a certain minimum voltage before the lightning impulse over voltage gets discharged through surge protecting devices. Therefore, operating voltage level of surge protecting devices must be lower than the said minimum voltage withstanding

Design of Foundation of Transmission Towers in Different Soils All foundation shall be of RCC. The design and construction of RCC structures shall be carried out as per IS:456 and minimum grade of concrete shall be M-20. Limit state method of design shall be adopted. Cold twisted deformed bars as per IS:1786 or TMT bars shall be used as reinforcement. Foundations shall be designed for the critical loading combination of the steel structure and or equipment and/or superstructure. If required prot