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Graduate Assessment Test GAT™-GENERAL is for admissions in MS / M.Phil programs. The test result will remain valid for “TWO YEARS” for admissions. Candidates with a minimum of sixteen years of education are eligible to appear in the test. Candidate intending to improve their previous GAT™ score can also apply.  The candidates will have to […]

Electrical Engineering Objective Type By M. Handa & A. Handa Index Electrical Current & Ohms Law Source of EMF AC Fundamentals RLC Circuits Network Theory Control System Engineering Materials Electrostatics Magneto Statics Electromagnetics Vacuum Tubes Semi-Conductors Transistors Amplifiers Oscillators Digital Electronics DC Generators DC Motors Transformers Synchronous Generators Synchronous Motors Induction Motors Single Phase Motors

INTELLIGENT: capable of sensing system overloads and rerouting power to prevent or minimize a potential outage; of working autonomously when conditions require resolution faster than humans can respond…and cooperatively in aligning the goals of utilities, consumers and regulators EFFICIENT: capable of meeting increased consumer demand without adding infrastructure ACCOMMODATING: accepting energy from virtually any fuel

A protective relay is a device that detects the fault and initiates the operation of the circuit breaker to isolate the defective element from the rest of the system. The relays detect the abnormal conditions in the electrical circuits by constantly measuring the electrical quantities which are different under normal and fault conditions. The electrical

The use of semi-conductors in place of mechanical switches is what makes a circuit “electronic,” because they enable electrical signals to be switched at extremely high speeds, which is not possible with mechanical circuits. There are many different semi-conductor. DIODE: Like a one-way valve for electrical current, this device enables only electrical current to pass

There are several ways in which the system and the generator may interact with subsynchronous effects. A few of these interactions are basic in concept and have been given special names which are discussed here. •Induction generator effect • Torsional interaction • Transient torque 1) INDUCTION GENERATOR EFFECT: Induction generator effect (IGE) is caused by

Pilot bus or weak bus is defined as the bus which, when supported, improves voltage profile at all the buses and also ensures additional security to the system, in terms of increased loading margin. Usually, placing adequate reactive power support at the weakest bus enhances static voltage stability margins. The bus which is close to

Since the development of interconnection of large electric power systems, it has been the spontaneous system oscillations at very low frequencies in the range of 0.2–3.0 Hz. After starts, it would continue for a long period of time. In certain cases, it continues to develop causing system separation due to the lack of damping of

The UPFC has many possible operating modes. In particular, the shunt inverter is operating in such a way to inject a controllable current, Ish into the transmission line. The shunt inverter can be controlled in two different modes: 1) VAR CONTROL MODE: The reference input is an inductive or capacitive VAR request. The shunt inverter

UPFC concept was proposed by GyuGyi in 1991. The UPFC was devised for real time control and dynamic compensation of ac transmission systems. It provides multifunctional flexibility to solve many of the issues facing the power delivery industries. UPFC is able to control synchronic or individually all the parameters (i.e. voltage, phase angle, and impedance)