A lead-acid battery is the most inexpensive battery and is widely used for commercial purposes. It consists of a number of lead-acid cells connected in series, parallel or series-parallel combination. A lead-acid cell basically contains two plates immersed in electrolyte (dilute sulphuric acid i.e. H2SO4 of specific gravity about 1.28). The positive plate (anode) is […]
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Hi friends, in this article, I am discussing about analog frequency meter working principle and hope you will find it informative and helpful. The action of moving iron analog frequency meter depends on the variation in current drawn by two parallel circuits – one inductive and the other non-inductive – when the frequency changes.
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Hi friends, in this article, I am going to describe the significance of vector group of transformer. It is very essential information for parallel operation of transformers and is very interesting as well. Connection of transformer windings can be made in a number of ways. Accordingly, different types of connections have been standardized depending upon
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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
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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
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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
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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
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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
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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
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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.
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