How to calculate rated currennt Of Mcb for 2hp motor...

Answer Posted / shri..

v = 415
hp = 2
PF 0.7
W = 1492

A = (1492)/(415*1.732*0.7)

A = 1044.4 /503.14

A = 2.96 Amps / Phase

Take a MCB c curve type

Is This Answer Correct ?    16 Yes 3 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

how does the rotating m.m.f is produced in the 3-phase induction motor and how the poles are created in 3-phase induction motor ?

2226


1. The DC generaror,s induced output emf is connected with a DC motor(as load). when increasing the load of the motor by using brake drum or any way. what are the parameters will changes in both motor and generator(voltage, current, resistance, frequency, speed, torque, power, flux etc...) 2. Similarly for AC generator and AC motor 3. similarly if using DC batteries instead of DC generator, What happens?

1695


Dear All we are having a problem in G120 BOP showing alarm A0503, F0052, F0060 we can not remove fault alarm ,Please any body help us. kowsar

1265


what is transformor oil gread

1975


Benifits of 3ph 4 wire metering over 3ph 3 wire

2012






What are the advantages and disadvantages of negative feed back?

644


what is calculation mathod/formaulla for deciding Size of busbar (Copper/ aluminum)for L.T. panel on Various Fault level like 50kA,25kA,10kA

2321


What is difference between YNyn0 and YNyn ??

1813


Why the efficiency of a three-phase induction is the motor is less than that of a three-phase transformer?

724


How to perform a DC resistance test In Alternator and their proceduces?

1076


The electrical energy required to raise the tempreture of a given amount water is 200 kwh. If the heat losses are 20%, the energy required is?

1519


If UG power cable both ends are to be earthed or what? If not why?

1503


what is the principle of the single phase energy meter? and,what is the advantages and disadvantages of single phase energy meter?

3961


Can we use shunt trip coil instead of trip coil with protection relay for protection?

1311


What is the maximum percentage voltage drop (vd%)for a motor control center

1553