Answer / ahmed alyassi

My friend if we assume the normal.current is 7 amps
Then due to that split ac is considered it is inductive load
The starting current would be x5 or x4 more
So . 7 times 4 =28 amps

But even if your breaker is 25 lets assume
It might not trip. Immediatly cause the delay and the amps didnt increase alot
I would recommend 32 A for 1ton or 1.5ton

Answer / lalitha

1ton=3.5168kW,
I=p/vcos(theta)
I=3.5168/230*.95
=16.09
For power factor of 0.85 current is 17.98
So to even consider initial rush of current 20A breaker is used

Answer / pawan

dear friend 1TR - 1200WAT= 1.2 KILOWATT
AND watt=v*i

I= W/V =1200/240=5 AMP

YOUR ANS IS 5 AMP DEAR

Answer / raghavendran

A 1 ton AC consumes 3.5KW of power.so under running
condition we can estimate the current consumed as
3500/(230*.8 say)

Answer / nikunj

1 TR = 3.51 kw
Now as per formula, P = V x I x COSphi,
I = P / (V x COSphi) for single phase,
I= P / (1.73 x V x COSphi) for three phase, so you can
easily calculate the current rating required.

How would we calculate the no of earthing pits required for motor /panel

5 Answers   APGenco, National Engineering Industries, Practical Viva Questions,

---

what are 3 factors when selecting a contactor for a job?

1 Answers  

---

Tell me about yourself. ……………………………………. Why did you leave your last job? What do you see yourself doing five years from now? Ten years from now? What are your long-range career objectives? Why did you choose this career? How well do you work with people? Do you prefer working alone or in teams? How would a good friend describe you? What would your last boss say about your work performance? Why should I hire you? What makes you qualified for this position? What do you think it takes to be successful in a company like ours? In what ways do you think you can make a contribution to our company? What's the most recent book you've read? What two or three accomplishments have given you the most satisfaction? Why? Describe the most rewarding experience of your career thus far…………… Why did you decide to seek a position in this company? What can you tell us about our company? What do you know about our competitors? What two or three things are most important to you in your job? Are you willing to travel for the job?

0 Answers  

---

What is the difference between earthed and unearthed power cable.

1 Answers  

---

75kw drive operated motor current fluctuation from(85-130)ampere.current setting in drive is 130amp.sometimes motor trip when current limit cross 130amps.I change the drive. still current fluctuate between 80-130amps but in this time motor not trip,current setting in drive is 130amps.where is the problem?

1 Answers  

---

---

What are test values for an 63 KVA and 100 Kva Distribution Transformers for the following typical tests 1)Magnetic balance 2)Short circuit test 3)Open Circuit test 4)Vector group confirmation test .please give me the standard values for all the above tests.

0 Answers  

---

Difference between Lugs and Thimbles

0 Answers   ABB,

---

How the frame size of a flange mounted AC induction motor is calculated?

0 Answers   APCPDCL,

---

Can we use Ccapacitive voltage transformer directly for metering purpose?

0 Answers  

---

What is the effect of positive feedback on the stability of the systems?

0 Answers  

---

How does an oscillator differ from an amplifier?

0 Answers  

---

WHAT HAPPENS IF STARTER OF A FLUROSCENT LAMP IS SHORT CIRCUITED AND WE PUT THE SUPPLY ON?

1 Answers  

---