Hi friends, in this article, I am going to discuss the polarity of transformer windings, if you are interested, keep reading. Unlike DC system, there are no fixed positive and negative poles in AC system, and hence, transformers cannot have fixed positive and negative terminals. The relative direction in which primary and secondary windings of a […]
The following connection schemes of the power distribution system are generally employed: Radial Distribution System In a radial distribution system, separate feeders radiate from a single sub-station and feed the distributors at one end only. A single-line diagram of a radial system for AC distribution is shown in the figure. Here substation supplies power to
Radial, Ring Main & Interconnected Distribution System Read More »
The distributors of AC and DC distribution system are generally classified as per the way they are being fed by the feeders. The main distributor types in power system are as under: Distributor Fed at One End In this type, the distributor is connected to supply at one end and loads are tapped at different
Different types of capacitors are found nearly in every electronic circuit. A capacitor is basically mean to store electrons (electrical energy) and release them whenever desired. A capacitor consists of two conductors separated by an insulator. The conductors are known as plates and the insulator is known as a dielectric. Capacitance is the
Hi friends, in this article, I am discussing the vfd working principle and hope you will find it very help full and informative. The squirrel-cage induction motors are the most common three-phase motors used in industrial applications. The preferred method of speed control for squirrel-cage induction motors is to vary the frequency of the supply voltage, and the system
Synchronous motors have their pole-shoes slotted for placing copper bars. The copper bars are placed in these slots and short-circuited at both ends by heavy copper rings (like squirrel cage rotor of induction motors). This arrangement is known as damper winding in synchronous motor. Role of Damper Winding in Synchronous Motor The damper winding in
Hi friends, In this article, I am going to discuss the capacitive proximity sensor working and inductive proximity sensor working and my article will increase your knowledge on this topic. A capacitive proximity sensor senses the presence of an object (usually called the target) without physical contact. They can detect both metallic and nonmetallic targets.
Hi friends, In this article, I am going to describe the advantages and application of synchronous motor. Some characteristic features of this machine are as follows: 1. It runs at a constant speed (synchronous speed). The only way to change its speed is to vary the supply frequency. 2. It is not inherently self-starting. 3.
Hi friends, In this article, I am going to explain the effect of excitation on the synchronous motor, V – curves and over excited synchronous motor. This article will help you to understand the behavior of these motors. When the rotor of the synchronous motor rotates an EMF is induced in its stator winding due
Since a synchronous motor is inherently not self-starting, the following synchronous motor starting methods are adopted generally: Synchronous Motor Starting Methods Pony Motor Starting Method: In this method, a small induction motor known as pony motor is used to bring the motor speed to synchronous speed. After the speed has reached up to its synchronous