A complete Electrical Engineering portal
Transformers are rated in kVA or VA and not in kilowatts. While electric loads such as motors, lamps, heaters, etc. are always rated in kW, equipment used for power generation and transmission (generators and transformers) are rated in kVA. This article illustrates why are transformers rated in kVA and why not it is rated in … Read more
Here are the most frequently asked transformer interview questions and their answers What is a transformer? By definition, a transformer is a static electrical device that transforms electric energy from one level to another level. Normally transformers are used to step up or step down voltage and current levels, impendence matching and providing electrical isolation … Read more
Safety is the primary element of any circuit or electrical connection. Whether it is electric iron or refrigerator or any other home appliances, everywhere safety has to be ensured to protect the people getting in contact with them from electrocution. The question, “why one of the pins in a three-pin plug is longer and thicker … Read more
This article focus on explaining the similarities and dissimilarities between neutral and earth (ground). Understanding the difference between neutral and earth may be difficult in the beginning. A Lot of safety and protection-related aspects need to be carefully studied for a better understanding of the difference between them. Note: For this article, let us consider … Read more
Over-current and overload are abnormal conditions occurring in a circuit. This article well explains the difference between over-current and overload. Difference between over-current and overload Over-current Any situation in which the current flow through a device or conductor exceeds the desired value is known as over current. Both overload and short circuit can cause excessive … Read more
Short Circuit A short circuit occurs when two or more current-carrying conductors of different phases or different voltage levels or different terminal (in DC circuits) come in contact with each other or with the ground. It is an abnormal condition during which current shoots up several times the permissible limits. Read about short circuits in … Read more
An Ammeter is a device used to measure the current flow through a conductor. The name is derived from the unit of current, Ampere. This article explains why is ammeter connected in series but not in parallel. An ammeter is either connected in series to the line along which the flow of current is measured … Read more
The circuit breakers and isolators serve a common purpose of circuit interruption. The primary difference between them lies in their behavior during faults in the circuit. In this article, let’s discuss the difference between a circuit breaker and an isolator. Isolator/ Disconnectors An isolator or disconnector, as the name indicates, is a switching or isolation … Read more
Transformer action is a phenomenon by which EMF(Electro-motive force) is induced in from one coil to the other coil by electro magnetic induction. It is the basic principle of electric transformers. When a certain AC voltage is applied to a coil, current, proportion to the applied voltage and inversely proportional to the impedance, flow through … Read more
MCB (Miniature circuit breaker) is a re-settable device designed to protect a circuit from short circuits and overcurrents. The trip curve of an MCB (B, C, D, K, and Z curves) tells us about the trip current rating of Miniature Circuit breakers. The trip current rating is the minimum current at which the MCB will … Read more
