A Star-Delta Circuit is a type of electrical circuit used to convert a three phase AC power supply into a single phase AC power supply. It consists of three resistors connected in a triangular shape, which resembles the Greek letter delta, and three resistors connected in a star shape, which resembles the Greek letter star.
In a Star-Delta Circuit, the three resistors in the delta shape are connected in series with the three resistors in the star shape. This creates two paths for the electrical current to flow: one path through the delta resistors and one path through the star resistors. By switching between these paths, the circuit can convert the three phase AC power supply into a single phase AC power supply.
The 6R resistor is used to measure the current in the circuit. It is placed in series with the load to act as a shunt resistor. This allows for the measurement of the current passing through the load without interfering with the circuit's operation.
To measure the current in a Star-Delta Circuit, the 6R resistor is placed in series with the load. The voltage drop across the resistor is then measured using a voltmeter. Using Ohm's Law (V=IR), the current can be calculated by dividing the voltage by the resistance (I=V/R).
One advantage of using a Star-Delta Circuit is that it allows for the conversion of a three phase AC power supply into a single phase AC power supply. This is useful for powering single phase devices in industrial settings. Additionally, the use of the 6R resistor allows for accurate measurement of the current in the circuit without disrupting its operation.