Answer / kali krishna

MCB Rating = 3* Full Load Current of that Motor, calculate the full load current by taking the hp Rating of that particular Motor.

Answer / b soni

calculate the line currant of motor if it it 25A

phase cuurant = line currant/1.73

get the mcb of phace cuurant's rationg

25/1.73= 14A
get the mcb of 15A

What is Nominal voltage?

3 Answers   Bhel, Equate,

---

what are factors to be consider to design a HT & LT motor?

1 Answers  

---

How the surge voltage can be arrested in electronic devices

1 Answers  

---

what happen as when voltage drop(or may decrease) ? in case of atomic base theory?

0 Answers  

---

What is the name of oil which is used in transformer?

3 Answers  

---

A 500 V shunt motor runs at its normal speed of 250rpm when the armature current is 200A. The resistance of the armature is 0.12 Ω. Calculate the speed when a resistance is inserted in the field reducing the shunt field to 80% of normal value and the armature current is 100A.

0 Answers   VECL,

---

only some transformers and some generator requires NGR why?

1 Answers  

---

Can a 50-Hz designed transformer be used at 60-Hz system? Is the same remains true, when a 60-Hz designed transformer be used at 50-Hz system? Consider only frequency variation. The voltage remains as rated value in all cases. Justify the answer.

2 Answers  

---

what is the main difference between power devices and signal devices

0 Answers   Wipro,

---

how to remover corona effect and hysteresis losses from contactor

0 Answers  

---

what is let through energy of mccb

2 Answers  

---

i HP = ?? 746 watts or 735.5 and how??

1 Answers  

---