Tricky but Easy Electrical Engineering!
Electric Power can either be transmitted by means of AC or DC. Each system has their advantages and disadvantages. Therefore it is very crucial to have a comparative study of their merit and demerits and then decide which method should be adopted to transmit power. Advantages of DC Transmission: 1) The high voltage DC Transmission … Read more
Single Circuit Transmission Line refers to an arrangement of conductor over the Transmission Tower. In Single Circuit Transmission Line, three conductors corresponding to three distinct phases i.e. R, Y & B phase are run on the Transmission Tower. Double Circuit Transmission Line refers to the arrangement in which a total of six conductors are provided … Read more
GMD & GMR stands for Geometrical Mean Distance and Geometrical Mean Radius. This concept is very useful in Power System for the calculation of Inductance and Capacitance of Transmission Line. Basically, as we know that Geometrical Mean of n numbers a1,a2,a3,….,anis (a1a2a3a4….an)1/n The same concept is also used for the calculation of GMD and GMR. … Read more
Arcing Horn is basically projected conductors used to protect the Insulators in High Voltage Transmission Line from damage during flashover. Over voltage on Transmission Line may occur due to various reasons like lightning strike, sudden load variation, fault etc. Due to this high voltage a flash over may take place which will shatter the Insulator. … Read more
The conductor is one of the important item in a Transmission Line and proper selection of conductor and its size is very important for economy and efficiency point of view. A conductor used for Power evacuation and distribution must have the following qualities: High electrical conductivity. High tensile strength to withstand mechanical stress. Low cost … Read more
As we know that Transformer Open Circuit Test is conducted on LV side and that Short Circuit Test on HV side. To understand the reason behind this, we will consider a Single Phase Transformer of rating 3300 / 220 Volt, 33 kVA. Thus the voltage at the LV side of this Transformer is 220 Volt. Therefore, … Read more
The different types of structure that have been used for an Induction Type relay are commonly called: The Shaded Pole Structure The Watthour-Meter Structure The Induction Cup and Double Induction Loop Structures The Single Induction Loop Structure. The Shaded Pole Structure: The shaded-pole structure as shown in figure below is generally actuated by current flowing … Read more
All the relays operate in response to one or more electrical quantities either to close or to open contacts. There are really only two fundamentally different operating principles: Electromagnetic Attraction, and Electromagnetic Induction. Electromagnetic attraction relays operate by virtue of a plunger being drawn into a solenoid, or an armature being attracted to the poles … Read more
Short Circuit Test and Open Circuit Test are two important tests which are carried out on a Transformer to determine its equivalent circuit parameters, Voltage Regulation and Efficiency. Transformer Short Circuit Test Short Circuit Test of Transformer is performed on HV side and the supply voltage is so adjusted that rated current flows … Read more
Open Circuit Test and Short Circuit Tests are two important tests which are carried out on a Transformer to determine its equivalent circuit parameters, Voltage Regulation and Efficiency. Though theses parameters can also be found using the physical dimension of Core and Winding detail but using Open Circuit and Short Circuit Tests are quite easy … Read more