Electrical

  This picture is the easiest way that I’ve found to understand Ohm’s law. Ohm’s law describes the amount of resistance the current has to face while it travels between two points. Definition: Ohm’s law states that the current through a conductor between two points is directly proportional to the voltage across …

Electrical engineering is a very broad field. Just in the electric power industry alone, there are relay protection, communications, substation, distribution and transmission engineers. This industry began around 1885 and over its history, the infrastructure has been built and rebuilt over the years. The most obvious reason for the rebuilding, …

Dioder is a semiconductor device with two terminals, typically allowing the flow of current in one direction only. Diodes allow current to flow when the anode is positive in relation to the cathode. It is sometimes useful to summarise the different types of diode that are available. Some of the …

Every Electrician has a pair of pliers in their house. But u will surprise that how many pliers exist and u are not aware of them. 1.Crimping Pliers     These pliers have the fulcrum at the far end and are used similarly to a nutcracker. Wires are fed into the …

When an electrical contractor is racing against the clock to provide timely service to customers, every minute counts. As such, many contractors are equipping their electricians with a fully stocked “warehouse on wheels.”   For service contractors, vehicles can serve as rolling billboards. As such, companies must not only keep …

Air Circuit Breaker (ACB) is an electrical device used to provide Overcurrent and short-circuit protection for electric circuits over 800 Amps to 10K Amps. These are usually used in low voltage applications below 450V. there are two types of air circuit breakers 1.Air-Break Circuit Breakers In Air-Break Circuit breaker the contact separation …

Fundamental difference is that Relay is a sensing device where as Circuit Breaker is a fault interrupting equipment. Relay is a protective device which senses the faulty conditions in a power system line and initiates the operation of circuit breaker to isolate the faulty part from the rest of the healthy …

As a general rule, construction of an induction motor consists essentially of two main parts : a) a stator and b) a rotor In rotor construction, there are two types of motors are coming.. Squirrel cage rotor motor Phase wound or wound rotor motor   Let’s know something about the …

Different types of cement are manufactured to meet different physical and chemical requirements for the specific purposes.   The different types of cement are as follows: Ordinary Portland Cement It is used for all general purposes and widely used for all ordinary concrete work, mortar, plaster etc. Portland Pozzolana Cement It is also …

Power transformers are used for transmission & receiving purpose, whereas distribution transformers are used only for distribution purpose. Power transformer voltage ratio varies b/w 756 kV to 11kV. Whereas the distribution transformer voltage ratio varies b/w 33kV to 430V. Power transformers usually have higher MVA rating compare to distribution transformers. …

DC motors are classified into shunt motor Series motor Compound motor The compound motor is again classified as Long shunt motor — in long shunt, the shunt field is parallel with both the armature winding and series winding. Short shunt motor- in short shunt, the shunt field is only parallel …

  The figure shown explains the difference between AM & FM. A high-frequency carrier is used in both the modulation schemes. In AM, the amplitude of the carrier signal is modulated according to the varying amplitudes of the input signal (Black color), maintaining constant frequency for the resultant AM signal …

Aside from the fact that they have totally opposite effects on the current in a circuit, capacitors and inductors are two totally different but equally important components of modern electronics. An inductor is nothing more than a coil of wire, with as few as two loops up to hundreds of …

Single phase and three phase are two forms of alternating current which involve a sinusoidally varying voltage or current. The single phase is used in a place where less power is required and for running the small loads. The three phases are used in large industries, factories and in the …

Current Transformer If the CT is under service the secondary of a C.T cannot be open circuited on any condition. The CT can be regarded as a series transformer. The current in the primary side of a C.T is independent of the secondary also known as the burden. The primary …

A current transformer is a device which produces an alternating current in its secondary which is proportional to the alternating current in its primary. A current transformer (C.T.) is used where the current is too high to measure directly, or the voltage in the primary circuit is too high, so …

The universal motor is nothing but dc series motor. When dc motor is supplied with AC supply then torque generated is positive for both half cycles. Because during the negative half cycle, armature current reverses and flux also reverses so that resultant torque is in the same direction as that …

Let’s start with this. There are three types of power. Apparent power (KVA), Reactive power or wattless power (KVAR) and Active power or useful power(KW). Let’s take an example of the motor. Electricity board provides us KVA. As we know we need to set up magnetic field within motor for …

A power transformer is usually employed for the purpose of converting power, from one voltage to another. If it is used for converting power from a high voltage to a low voltage, it is called a step-down transformer. The conversion efficiency of a power transformer is extremely high and almost …

what is armature winding? The winding from which you will get the output will be termed as armature winding . and the other winding will be called a field winding. Let me explain How? In case of D.c machines, we say that field winding is present on the stator field …

No electrical engineer sucks if he definitely has ultimate interest or passion towards it. There are many students who don’t see them fit for electrical engineering. It’s because of lack of knowledge in the concerned department or lack of interest. Engineering is not just the study for 4 years. it’s …

The lightning arrester protects the electrical equipment from lightning. It is placed very near to the equipment and when the lightning occurs the arrester diverts the high voltage wave of lightning to the ground. The selection of arrester depends on the various factors like voltage, current, reliability, etc. The lightning …

There are main three categories of insulator that is used as an overhead insulator: Pin Insulator Suspension Insulator Strain Insulator Pin Insulator Pin Insulator is one the youngest overhead insulator, that has a capacity up to 33 KV system. It has one part, two parts, and three parts type, which totally depends …

The motor is an electromechanical device, which consists of rotating conductors and magnetic field to transform electrical energy into mechanical torque. Whereas pump is a hydro-mechanical device that converts mechanical torque into hydraulic/pressure energy. Motoring action ( electric one ) obtained based on Faraday’s law of electromagnetic induction and motor …

A DC motor works in the same principle as an AC motor, with a mechanism to allow it to rotate even if the supply is not alternating. After all, simple motors work because the direction of current reverses (alternates) every half cycle, rendering the armature to rotate. Now, why does the …

A transformer is a device working on mutual inductance principle to convert electrical energy from one voltage/ current level to another. There are different types of transformers used for different purposes. (1) POWER TRANSFORMER Laminated core Transformer Toroidal Transformer Auto transformer Variable auto transformer Induction regulator Transformer(high voltage transformer) Polyphase transformer …

A contractor is an electromagnetic device which is used to make or break of an electrical circuit. there is two type of contractor. power contactor. auxiliary contactor. Power contactor is used in power circuit like switch on/off of a motor capacitor. while auxiliary contactor is used to switch on or off of a control circuit. a power contactor have 3 main contacts while an auxiliary contactor has many contacts like 1no+1nc 2no+2nc ect..power contactor is generally used where we required to make and break a large current carrying circuit. The Relay …

Here is some Basic Electrical Terms Full Form that Every Engineering Should know this:   1. HT = High Tension (Transformer HT Side) 2. LT = Low Tension 3. AB Switch = Air Break Switch 4. DO Fuse = Drop Out Fuse 5. ACB = Air Circuit Breaker 6. VCB = …

There are so many differences between these two by feature and application, however, few of them are as below: 1- MCB(Miniature Circuit Breaker) is for basic protection device to limit the current and fault in a circuit whereas ELCB(Earth Leakage Circuit Breaker) is advanced one which responds only when the …

The stator is an unmoving component of an electrical machine that’s going around the rotor. It’s derived from the word ‘’stationary’’ as the ‘’stator’’ implies. It contains the windings and provides mechanical support and protection for the motor.                             …

People walking one behind the other in a long chain are walking in Series. People walking side by side across a broad front are walking in Parallel. The same terminology applies to whatever it is that you are connecting up. You don’t say what context you are in. Series Circuit  …

There are some basic formula of Electrical Engineering Formula Every Engineer Must Know this      

In This video, you will get how to test Big Ac Motor At Work Read More: Difference between PLC and SCADA

How inverters work. In this video, we take a look at how an inverter works to convert direct current (DC) into Alternating current (AC). Inverters are used increasingly throughout the industry as well as building services for HVAC systems to achieve precise control of AC induction motors connected to AHU …

In this video we learn how electricity works starting from the basics of the free electron in the atom, through conductors, voltage, current, resistors, led, to capacitors and transformers  Read More: How Does Transformer WORKS

Current-carrying capacity: tables (Extract from VDE 0298 T4 06/13 tables: 11, 17, 18, 21, 26 and 27) Current-carrying capacity, cables with a nominal voltage up to 1000 V and heat resistant cables VDE 0298 T4 08/03 table 11, column 2 and 5 column 2 column 5 the way of laying in …

A true capacitor stores its energy in an electric field (akin to a magnetic field for a magnet). A battery cell stores its energy by creating a chemical that would happily decompose into a more stable chemical. If your question, though, is “What is the difference between an electrolytic capacitor …

A servo motor will rotate to an exact position, based on what it is being commanded to do. An example is the steering on a radio controlled car, where a servo is used to move the front wheels ‘to’ an exact angle A stepper motor will move forward or backward …

In general way of common people’s understanding: These both words are used interchangeably by persons belonging to a different field than power electronics. They essentially mean to convey the functionality of the device (DC to variable freq AC) and as long as this is done, power electronics people (like me) …

Different Types of Sensors We live in a World of Sensors. You can find different types of Sensors in our homes, offices, cars etc. working to make our lives easier by turning on the lights by detecting our presence, adjusting the room temperature, detect smoke or fire, make us delicious …

Let us come from basics. We call flow of charge is called current. And in order to create the flow, we need a force. That we are achieving the positive charge and negative charge. As positive charge and negative charge attract each other we create a circuit and makes it …

Neutral Vs Earth Neutral : Neutral is the normal ” return ” wire. In systems where the load is supplied from only one Hot (or “Live”) wire, the Neutral completes the circuit and carries current back from the load to the power station. Neutral is a conductor that carries current …