what will happen if one of the phases from a 3-phase motor
is disconnected?? stop/run at 2/3rd speed or run at same
speed????

Answer Posted / niranjan

The motor will keep on running for a while but the current will rise on the other two phases and the overload relay will fall out, if its properly set and the motor will stop if the overload relay is set to high the motor will burn out

in the start Motor will start to shake the if there is no protection devices for over-load on the motor it will simple explode:)
Three-phase motors also vibrate less and hence last longer than single-phase motors of the same power used under the same conditions.

Is This Answer Correct ?    5 Yes 0 No



Post New Answer       View All Answers


Please Help Members By Posting Answers For Below Questions

Why magnetic flux produces an induced current?? what is the detailed procedure ?? ans plz

3376


what parameters should we check to reduce the power bill

1920


what is power factor ? how we can calculate the low power factor and amount of capacitor for improve that low factor ?

1202


How do we calculate the Out put voltage of generator, after the excitation is being given?

1581


Draw the vector diagram and condition for the following: 1) Dyn1 2) Ynd0 3) YnYn0

3293






How RTCC panel is working and give single line diagram for RTCC with transformer?

2726


what is the principle of operation of CFL ??

2296


how to calculate the torque of a motor?

1697


why the projects getting loss?

1551


How a capacitor discharge weld power supply works? what is the use of a pulse transformer?

1660


sent to a site and asked to explain how you would like a twenty seven flour building should be supplied with lighting and sockets plus a water boiler.

1589


What is control system?

841


What is inrush current?

727


what is meant by star/delta voltages as 440/220 in a 3 phase induction motor, and why it should be connected on STAR IN 3 PHASE SUPPLY

1869


any application of back emf

1753