Hi @memamun, thank you for participating in the Industrial Electrical Homework. We have assessed your Homework post , and the below captures our assessments.

---

A. Your definition of industrial automation is correct. You have covered the basics of industrial automation. Automation is the method of completing large tasks in less time using computer programming. (0.5 Mark)

B. After the advent of automation technology, the production of goods has increased manifold. I have seen from my experience that our company used to produce one hundred tons of rods daily manually. After the advent of the automation system, now three hundred to four hundred tons of rods are made daily. (1 Mark)

C. You have drawn the block diagram of the PLC and written the functions of the various parts. A nicer presentation would have been if you had described the block as well as the device name. (1.4 Marks)

D. You have named five input and output devices of PLC. If the input and output device selection time is wrong, then the PLC will not work, so it is very important to determine the device correctly. (1 Mark)

E. Your transformer calculation is correct. But you won't get 14,600 KVA or 14.6 MVA transformers. You need to purchase a 15 MVA transformer. (1 Mark)

For a 5 kW motor, you have designed a star delta starter, which will increase your cost. Since the motor is small, the cost will be less if you use a DOL starter. (0.5 Mark)

Star Delta starter for 45 kW motor made the right decision. 45 kW motor will take more current, so the star delta connection is correct. But you haven't worked out the motor's current rating or made the specifications. (0.4 Mark)

A forward reverse starter would be required to drive a 15 kW motor in both directions. Your answer is not correct. (0 Mark)

F. You have not checked the motor and reviewed it good or bad. I checked the motor with a multimeter and found it broken. We assume the motor is bad because the kilo-ohms value is showing on the multimeter. (0.5 Marks)

You tried to learn about industrial automation and motors, which you understood by reading your homework. This week's lesson will make you a skilled electrician. The starter circuit is selected based on the motor's current rating. If it is wrong, the cost will be high.