Electrical Engineering Answers

How far from the y-axis is the centroid of the area bounded by the curve y=x^3, the line x=2, and the y-axis.

Construction of Circle Diagram – Induction Motor

1. Introduction: A circle diagram is the graphical representation of the performance of an electrical machine drawn in terms of the locus of the machine’s input voltage and current. It can be drawn for alternators, synchronous motors, transformers and induction motors. The circle diagram is drawn using the data obtained from the no – load and blocked rotor test in terms of rotating electrical machines. 2. Instructions: Conduct a no – load test and blocked rotor test on the induction motor and calculate the per phase values of no load current I0, short-circuit current I𝑠𝑐 and the corresponding phase angles Φ0 and Φ𝑠𝑐. Also find short circuit current I𝑠𝑛 corresponding to normal supply voltage. With this data, the circle diagram can be drawn as follows see Fig: 3.17. 2.1 With suitable scale, draw vector OA with length corresponding to I0 at an

Give a brief description or definition of the regulations in relation to the following:

i. Control of supply to consumers' installation ii. Means of isolation iii. Detached buildings