Start networking and exchanging professional insights

Register now or log in to join your professional community.

Follow

Give Three possible electrical reasons why a three-phase induction motor will not run when it is started ??

user-image
Question added by Ali Waqas Bhatti , Electrical Engineer , Lakson Group of Companies
Date Posted: 2015/02/23
Alaa Alsouradi
by Alaa Alsouradi , Service Engineer , Rieckermann services Ltd

1- The winding burnt 

2- loose on one or more in supplying phases

3-One or more of the winding coils is open 

Dattaram Rahate
by Dattaram Rahate , Agent , Star Health

1) Check power weight of induction motor.

2) Motor shaft key is missing or damaged.

3)  check all switches or motor starter  points or smell coil is damaged.

Faisal Patel
by Faisal Patel , Assistant Manager Electrical & Electronics , Premier Cables (Pvt) Ltd

1- Winding is short due to burn out.

2- Winding is open due to cuts.

3- Supply is open due to breakage of supply wire.

4- Slip ring is not properly providing the current to the rotor.

Himadri Roy
by Himadri Roy , MANAGER ELECTRICAL , STEAG ENERGY SERVICES

1) Locked Rotor.

2) Stall

3)Not fulfilling Start permissive.

4) Control fuse burnt.

5) Motor Burnt.

6) All3 or1 Power Fuse burnt

7)Motor tripped &  tried to start without Overload resetting.

8) Control cable loose/open/burnt

9)Motor Short circuited/ got Earthed

10) Push button Element got faulty / loose, Dust inside Push botton

SYED Noman Ahmed
by SYED Noman Ahmed , Meter Inspector Offiecr , K-Electric

Testing & troubleshooting 

This is my first step to cheek wiring. 

Second cheek the motor winding to the ma-gar meter.

after all will go to work shop open the motor cheek to the bearing.

where is missing to repair to maintenance. 

Costin Sirghei
by Costin Sirghei , LEAD ROTATING EQUIPMENT CONTROLS ENGG. , General Electric

1. Motor Control Center in Test position.

2. Internal protection activated (temperature by either true of faulty probes signal).

3. A lock-out it's present giving a past fault, and a timer it's counting back.

thiagarajan reddy
by thiagarajan reddy , shift electrical engineer , chemplast sanmar ltd

1)check all the three phases ara available

2)check the control supply present

3)wheather the motor tripped on overload

Omar Hayat
by Omar Hayat , Senior Electrician , Bestway Cement

Power cable can be flash, motor winding can be flash & motors router can be stucked

Dumadi Yusuf
by Dumadi Yusuf , Preventive Maintenance , PT. Perfetti van Melle Indonesia

1. One of phase is loose2. No power supply3. One of wire stator is broken

Khadim Hussain
by Khadim Hussain , Superintendent (Electrical) , Orient Energy Systems Pvt Ltd

If power supply is present then

  1. Open or short circuit in satator
  2. Open or short circuit in rotor
  3. Meachnically over load

Kalim Rahman
by Kalim Rahman , 3P Co Ordinator , Unilever Bangladesh Ltd

Before any of the suggestions given below, check the starting system overload if it is tripped. Then check the phase to phase voltage at the Magnetic contactor/overload output. 

More Questions Like This