Sudden Change in Mechanical Input
Applications of Equal Area Criterion Below figure shows the transient model of a single machine connected to infinite bus bar.
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The Exclusive NOR (EX-NOR) Gate
An EX-NOR gate is an EX-OR gate followed by NOT gate. The basic EX-NOR gate is a two-input and one
Read MoreThe Exclusive-OR Gate (EX-OR)
A basic EX-OR gate is a two input single output logic gate, whose output is assumed to be HIGH only
Read MoreThe NOR Gate
A NOR gate is a combination of OR gate and NOT gate. So we can say it is a NOT-OR
Read MoreThe NAND Gate
The NAND gate and NOR gate are called Universal gates because they can perform all the three basic functions of
Read MoreBasic Gates
The NOT Gate The NOT gate has a single input variable and a single output variable. The NOT operation is
Read MoreLOGIC GATES
Logic gates are the based building blocks of any digital system. They are usually constructed in LSI and VLSI circuits
Read MoreKarnaugh Map
The “Karnaugh map” is a graphical method which provides a systematic method for simplifying and manipulating the Boolean expressions or
Read MoreBoolean Algebraic Theorem in Digital Electronics
De Morgan’s Theorem These are very useful in simplifying expressions in which a product or sum of variables is inverted.
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Weekly Current Affairs for UPSC ESE, SSC JE, RRB JE & Other Exams Candidates preparing for government exams like UPSC
Read MoreLaws of Boolean Algebra
The Boolean algebra is governed by certain well developed rules and laws. Commutative Lawswell-developed The commutative law allows change in
Read MoreDefinitions of Operation
Most of the relays are restrained by spring so that they are at a pre-determined position when completely de-energized. At
Read MoreTypes of Protection
There are mainly two types of protection: Primary protection: It is the first line of defence and ensures quick acting
Read MoreTypes of Circuit Breakers
1. Air-Break Circuit Breakers (ACB) 2. Oil Circuit Breakers 3. Vacuum Circuit Breakers (VCBs) 4. Air-Blast Circuit Breakers (ABCB) 5.
Read MoreOperating Principle of a Circuit Breaker (CB)
A circuit breaker consists of two contacts namely “fixed” and “moving contacts” which touches each other under normal condition i.e.
Read MoreCOMPONENTS OF SWITCHGEAR
Switchgear has got mainly four components which are as follows: Fuse Lightning arresters Circuit breakers Relays The various components along
Read MorePower System Protection
In a power system protection, faults can occur in any components like generators, transformers, buses or transmission lines and so
Read MoreFactor Affecting Transient Stability
It has been seen that transient stability is greatly affected by the type and location of a fault, so that
Read MoreFault Subsequent Clearance by Circuit Breaker
Let us consider a single machine tied to infinite bus through two parallel lines as shown below in figure. Let
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