..a) Draw the circuit diagram using BIS symbols to measure the power and energy in single
phase AC circuit with unity power factor.
Answers
Answer:
Rajesh Sharma chairman TRAI the power
The circuit is either opened or closed and the closed circuit is when everything is connected.
We saw in our tutorial about Electrical Power that AC circuits that contain resistance and capacitance or resistance and inductance, or both, also contain real power and reactive power. So for us to calculate the total power consumed, we need to know the phase difference between the sinusoidal waveforms of the voltage and current.
In an AC circuit, the voltage and current waveforms are sinusoidal so their confines are constantly changing over time. Since we know that power is voltage times the current( P = V * I), maximum power will do when the two voltage and current waveforms are lined up with each other. That is, their peaks and zero crossover points do at the same time. When this happens the two waveforms are said to be “ in phase ”.
The three main factors in an AC circuit that can affect the relationship between the voltage and current waveforms, and therefore their phase difference, by defining the total impedance of the circuit are the resistor, the capacitor, and the inductor.
The impedance,( Z) of an AC circuit is original to the resistance calculated in DC circuits, with impedance given in ohms. For AC circuits, impedance is generally defined as the rate of the voltage and current phasors produced by a circuit element. Phasors are straight lines drawn in such a way as to represent a voltage or current breadth by its length and its phase difference concerning other phasor lines by its angular position that's relative to the other phasors.
AC circuits contain both resistance and reactance that are combined to give a total impedance( Z) that limits current flux around the circuit. But an AC circuit's impedance is not equal to the algebraic sum of the resistive and reactive ohmic values as pure resistance and pure reactance are 90 degrees out-of-phase with each other. But we can use this 90 degrees phase difference as the sides of a right-angled triangle, called an impedance triangle, with the impedance being the hypotenuse as determined by Pythagoras' theorem.
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