Tricky but Easy Electrical Engineering!
Maximum Power Transfer Theorem states that, for any type of circuit whether ac or dc, maximum amount of power is delivered from source to load when the source impedance as viewed from the load terminal is equal to the load impedance. This theorem is used to find the value of load impedance for which there … Read more
Dependent Current Source is a four terminal active circuit element whose output current is dependent on circuit current or voltage. An active circuit element is one which can deliver power to the circuit. In this article, we will discuss the concept of dependent current source in detail with the help of circuit diagram. A current … Read more
Dependent Voltage Source is a four terminal source whose output voltage is dependent on circuit current or voltage. Unlike ideal voltage source, the magnitude of voltage output of this source is not constant. Rather, it is linearly related to input current or voltage. In fact, the output voltage of dependent voltage source is a scalar … Read more
Source Transformation is a technique to convert one kind of source into other. There are two types of sources: Voltage source and Current Source. Therefore, this technique will convert voltage source into equivalent current source and current source into equivalent voltage source. This kind of transformation is required to solve circuit network. Here, the sources … Read more
Ideal Current Source: Definition: An ideal current source is a two terminal device which supplies constant current irrespective of load resistance. The value of current will be constant with respect to time and load resistance. This means that the power delivering capability is infinite for this source. An ideal current source has infinite parallel resistance … Read more
Ideal Voltage Source An ideal voltage source is defined as the two terminal device capable of providing a constant voltage across its terminals. The voltage across the terminals of an ideal voltage source remains constant and is independent of load current. Symbol: The symbol of an ideal voltage source is shown below. Characteristics: As per … Read more
Islanding in Power System: Islanding is the intentional isolation of a part of power system during external widespread grid disturbance. This isolated part of Grid is called Island. Such a disturbance may lead to black out. Therefore, islanding scheme provides a mean to continue to supply power to the essential services in a zone or … Read more
A single phase half wave controlled rectifier is a thryristor based circuit which produces output voltage for positive half of the supply voltage. However, the phase relationship between the initiation of load current and supply voltage can be controlled by changing firing angle. This is the reason; it is called phase controlled half wave rectifier. … Read more
Ideal transformer is an imaginary transformer devised for sake of analysis of a practical/real transformer. The main difference between an ideal and practical transformer is that former is having an efficiency of 100% while the latter have efficiency close to 100% (around 99%). Let us now discuss some more differences between ideal and practical transformer. … Read more
PS Class CT is also known as PX Class or simply Class X Current Transformer. It is special type of current transformer meant for protection purpose. Various protection class CTs as described in IS 2705 part-3 is only useful for overcurrent protection. You may refer Accuracy Class of CT for detail. In many protection applications, … Read more